Guys-
I'm putting a '88 GTA L98 in my '91 GTA that has a 305PTI/5-spd right now. The mods so far to the L98 will be: Hypertech stage 2 chip, 160* thermo, Accel coil/wires, TB! bypass, Flowmaster exhaust(2.5" or 3") Edelbrock headers, port-matched TPI, AFPR, 22lb. injectors, a K&N on the TB, 1LE alum. DS, and a polyeurathane tranny mount. What cam should I use? I was thinking about a Crane Compucam, a STOCK LT4 (not hot cam), or what else. Which one should I use (what valve springs too) and who has it for a good price. I don't want an expensive cam from TPIS or SLP either! My car has the T5 w/ 3.08's right now but a T56 and 4.10's are in its future. I drive it quite a bit and am in college, but I just want it to run pretty f*#%@?g good and be able to eat some of those pesky 5.0 Rustangs! Well, let me know what you guys think... THANKS FOR THE HELP!!!

 

Hey . I have a brand new ZZ9 I havent installed yet. I'm not sure if I'm going to be using it anymore.

I may go with 08-304-08 Competition Cams.
Everyone tells me the ZZ9 is to big for a 305.

But the cam is brand new, still in box. If I don't use it, you can have it for $225 shipped. It will definitely be ok in a 350.

------------------
'92 Formula
305 TPI 5speed
1LE package
Mods: SLP headers,SLP catback,SLP air foil,ported plenum,Crane AFPR (42psi),MSD6AL,homemade cold air,K&Ns,3:73s,JET fan switch, Macewen white face gauges...ZZ9 cam (i still have to install it )

[This message has been edited by theformula (edited November 14, 2000).]

 

I tell you what I have heard great things about using the SLP TPI cam. Thouugh you can get the same cam profile from Summit at a lower price. Do this and put 1.6 full roller rockers and you will have what you need for your set up. Now if you want to go wild on the heads you can use a bigger cam, but then you need a custom PROM. Also that SLP cam is designed to run with a stock chip or slight after market chip like Hypertech or ADS. Hey Check my mods and I can take a LT1 6-speed without too much trouble, just not out of the hole becaue I only have a 2.77 gear, but once I get up above 2500rpm and out of 1st gear I really pick up. Just my $.02

------------------
86 Trans Am 355 TPI Rebuilt 700R4 with Corvette servo, modified valve body, and a B&M Torque Converter (2000 rpm stall w/ lock up), 87 350 block bored .30 with new crank, bearings, rings, and magnafluxed rods. Reworked 305 heads with 3-angle valve job. Added in the rebuild was an SLP TPI cam, BBK 58mm Throttle Body,SVO 24# injectors,MSD 6A, Hypertech Power Coil, 1.5 Crane roller tipped rocker arms, SLP Intake Runners and Port matching in upper intake including fully ported plenum, TPIS adjustable fuel pressure regulator @ 46psi, Hooker shorty style headers w/ Thermotech heat wrapping, Custom 3” exhaust with Flowmaster muffler and chrome quad tips, Hypertech Thermomaster Computer chip, K&N open element cone filter on modified MAF per TPIS specs, MSD Wires, removal of A/C hardware and a 1LE firewall cover installed. Also there has been a PST front suspension kit with Hotchkis strut tower brace
http://geocities.com/SunsetStrip/Garage/9548/kyle.html

Kills:
95 Talon TSI, 96 Probe GT, 91 T/A L98, 89 RS, 86 Mustang GT, 88 Mustang LX 5.0, 92 Thunderbird V8. couple or ricers that I think were Civics or Preludes not sure what year, 95 Celica GT-S, 94 Chevy 1/4 ton 350, one of those NASCAR F150's

 

Anyone else have an opinion?? THX

 

ZZ4, LPE211, LPE219

How about going to the cam tech article and reading those recommendations?

------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

Kevin-
I've already been there and it didn't really help. I see all the cams but don't know which one to use. THATS WHY I ASKED FOR SOME TECHNICAL ADVICE. I can't decide what to do and I'm planning on purchasing in the next few weeks. I thought about the LT4 Stock cam, but don't know if it will effect my prom, idle, or anything else. I have SD TPI too, so what do I have to recalibrate or set?(tpis or iac) It seems as if no one has done this before or they don't want to share info!?!? Oh well... I just don't want to get the wrong cam and be stuck w/ a motor that SUCKS!

 

A stock LT4 cam wont be much better than what you have now. I would go for the ZZ4 cam, the LPE211 cam, or a ZZ9 cam if you can find one used. I do think you will need new valve springs to go along with these cams, on the stock heads.

 

LT4 hotcam is not made for TPI . You may only find negative results unless you change the heads.

Try crane 104224 or comp cams 08-305-08, or even a ZZ9. I'm thinking of selling mine

You'll need a custom chip regardless of what cam you choose.
The key in choosing a cam is the cams ability to open up the valve quickly and to allow cylinder pressure to build up with less crankshaft rotation.
------------------
'92 Formula
305 TPI 5speed
1LE package
Mods: SLP headers,SLP catback,SLP air foil,ported plenum,Crane AFPR (42psi),MSD6AL,homemade cold air,K&Ns,3:73s,JET fan switch, Macewen white face gauges...ZZ9 cam (i still have to install it )

[This message has been edited by theformula (edited November 15, 2000).]

[This message has been edited by theformula (edited November 15, 2000).]

[This message has been edited by theformula (edited November 15, 2000).]

 

I AM NOT GOIN TO USE THE LT4 HOT CAM! How will the stock LT4 cam not be much of an improvement over the one I have. The numbers are way off from each other. The Lift is like a .490(1:5's) compared to the L98's .413 and the lobe seperation is better and it has more duration too. I figured this would be a good choice but I guess not. Where can I get the LPE cams and how much? Also(kevin) where can I get that ZZ4 cam at a cheaper price? I think you mentioned it before but I can't remember. Also, I am wanting a NEW cam, not used. THX

[This message has been edited by GTA91 (edited November 15, 2000).]

 

Don't use the LT4. It's configured for an LT1/LT4 engine. Not a good idea.
Too much of a difference in lift. Your heads won't support that and it will hurt you in the end. Like I told you before, go with 08-305-08 from Comp cams.

But I guess you can only lead a horse to water.

The cam I have for sale is brand new in the box.
Not used.


------------------
'92 Formula
305 TPI 5speed
1LE package
Mods: SLP headers,SLP catback,SLP air foil,ported plenum,Crane AFPR (42psi),MSD6AL,homemade cold air,K&Ns,3:73s,JET fan switch, Macewen white face gauges...ZZ9 cam (i still have to install it )

[This message has been edited by theformula (edited November 15, 2000).]

 

THX the formula! I just want to get it all straight!

 

The .490 lift of the stock LT4 cam is with 1.6 rockers, not 1.5's.

You can get the ZZ4 cam from any online GMPP dealer, like Scoggin Dickey, or Pace, or Sallee.

The LPE211 cam is from Lingenfelter.

I said to look at a used ZZ9 cam, because they're $375 from TPIS. Too expensive. Used they're about $200, or less.

Or, you can buy that cam from theformula.

 

Buy that cam from "the formula"...enough said.

------------------
TPI 305,
Gutted airboxes,
gutted MAF,
K&N filters,
Corvette Servo.
14.9@93mph

"Speed kills, wanna live forever, drive a Ford."

 

Theformula-
You said $225 shipped? I may take you up on that. How long will you have it? I looked at the specs on it and it looks good. I don't have to use TPIS valve springs do I? It may be a little while before I could buy it though. What your email address, I'll talk to you more then. THX
BTW- Those LPE cams are about $350 too...WOW!

 

One more thing:
I won't be able to use my chip that I have now with the ZZ9? Its a hypertech Stage 2. If not, will I be best off with a custom one... if so, from who and also how much? THX AGAIN

 

Email me man.

For a custom chip, there are a lot of places that will do it for you. Speed density's stock PROM doesnt like cam changes. And with the ZZ9 a lot of people report a rich/lean problem. An AFPR would be a band-aid for that problem. The chip would be the answer. Performanceresource.com, nextgen.com, tpis.com, and fastchip.com all burn custom chips that are good. However, Performance resource charges $400. TPIS charges $475!, fast chip charges $350....and nextgen charges $300.

Honestly any one of them will work. Just as long as your car "runs good" with the chip (meaning it will correct any driveability problems). Don't expect it to do miracles for performance just because it's an expensive mod. What makes it even harder to swallow is that the chip itself only costs $2.

------------------
'92 Formula
305 TPI 5speed
1LE package
Mods: SLP headers,SLP catback,SLP air foil,ported plenum,Crane AFPR (42psi),MSD6AL,homemade cold air,K&Ns,3:73s,JET fan switch, Macewen white face gauges...ZZ9 cam (i still have to install it )

 

Look I have the ZZ9 cam and for $225 I would buy it and you'll love it! It really pulls at 3000 rpms to 5500 rpms on my car.
You will need a custom chip no two ways around it. And you'll need new springs for the heads that will have 120 lb seat pressure ( I think at 1.75 inches ).
Anyway a new aftermarket intake manifold will be good to get for better air flow.
Do a search for custom chip manufactures and see which one is the better but if you are thinking of doing your own check the PROM form. Traxion The moderator of that board has do alot to help everyone, just check it out.

In any case Good Luck!


------------------
89 IROC 350 Auto
DUAL Exhaust
Edelbrock Performer Aluminum Heads
ZZ9 Cam
TPIS Level 5 Chip
14.01 @ 97.0mph with 2.77's gears

 

OK, but what will happen if I run the ZZ9 w/ my hypertech chip? Maybe just until I can afford the custom chip. Isn't there a guy named Ed Wright or something that does CHEAP custom chips? Thanks for all the help. Will this cam have any down low power, and will my 3.08 gears be ok w/ this cam for now? THX AGAIN

 

Ed Wright is at Fast Chip.

The hypertech chip will work, but it wont be perfect.

How do you have 3.08 gears?? Get an SLP take-off torsen posi for $99 (on their internet specials page) and then get 3.23 or 3.42 10-bolt gears.

Gosh I love spending other people's money.

 

lol kevin.

GTA91, you may have a rich/lean problem until you get the custom chip


------------------
'92 Formula
305 TPI 5speed
1LE package
Mods: SLP headers,SLP catback,SLP air foil,ported plenum,Crane AFPR (42psi),MSD6AL,homemade cold air,K&Ns,3:73s,JET fan switch, Macewen white face gauges...ZZ9 cam (i still have to install it )

 

I agree with Kevin and theformula on using a ZZ9 without a custom chip. The problem will be the reduced vacuum at idle with the SD system. At low rpms it will run like crap. With enough fuel pressure, you'll get reasonable WOT performance. But you'll be posting "Why does my car idles and runs so poorly with my ZZ9 cam?" in a short period of time.

 

Thanks guys-
I don't know what to do. The chips are going to be over $300 for sure. I thought about just putting 1:6's on the stock cam but that will be a lot of money so I may as well just get a cam while I have th engine out. I looked at the Compucam, I think its 104224 and its like $260 from Summitt. Is that a good price? With it, I'd just need heavier valve springs right? I'd like that ZZ9 too, but that kind of money for it and the chip,just won't work for me right now...oh well. So, I guess it may be the Compucam for me right now... what do you guys think about that? I guess I could go GMHPP ZZ4 cam, but I don't know what else I'll need besides new springs and also if it will be ok with my chip and mods? Thanks again for all the help... I just want to figure it out for sure this time!(unlike previous quotes)

Kevin-BTW it has the peanut cam and 3.08's because the G92 apparently wasn't mandatory like they said for the GTA's. It has the Y84 option which is for "GTA", but has no G92. I've seen a '92 in our area with 305TPI, auto,2.73's and rear drums. I looked at its codes too, and it was a TRUE GTA also. I guess we all don't get want we want!

 

I have some interesting news for you. I have a GM factory shop manual and there is only ONE cam listed for the LB9. Guess what, it has the same cam specs as the L98.

My factory shop manual does not list the duration but the lift (.415I/.430E) is the same for the LB9 and the L98. If there were a second cam based on different equipment (ie. automatic), my GM Shop Manual would list it.

As far as 1991 is concerned, there is no peanut cam for the LB9 automatic.

 

First it was spoken.... then it was written.

How long have I been saying this for?

Glad to finally be proven right.



------------------
91 Trans Am WS6
Bright White
5.0 TPI auto
Flowmaster 3" 2 chamber catback
Trans Go shiftkit
2000 stall converter

supposed 'peanut cammed' car (yeah, right)

Built on Wednesday

 

There is more than just one resource out there. There are peanut cams in '91 and '92. I OWN ONE! I know so because a friend has a similar '91 Z28 w/ G92 and 5.0 5-spd. He has the higher output gauges, 2 cats, better gears, and it runs circles around mine. This '92 GTA 5.0/auto/2.73 WAS a peanut cam car. It had the 5,000rpm redline and is SLOW. Thats all I gave to say. I know my car and that '92 both are not the L98 cammed LB9's. I'd bet a lot on it!

 

Is it stock? It's probably slow because it's stock. The GM Factory service manual isn't going to lie. If there was another stock cam profile for the 305 TPI, it would be there.
Mine isn't slow at all.

------------------
91 Trans Am WS6
Bright White
5.0 TPI auto
Flowmaster 3" 2 chamber catback
Trans Go shiftkit
2000 stall converter

supposed 'peanut cammed' car (yeah, right)

Built on Wednesday

 

The 92 GTA stock, but mine isn't. Mine runs pretty good... like yours, and mine has the small cam. As far as the Factory Service Manual, if you're going to believe everything that GM says then thats fine, as for me (and others I'm sure) I (we're) not! I've seen countless places where they stated that 90-92 had the 205-215hp LB9 AND the 230hp LB9. I still say they made both, and I can guarantee mine is the peanut cam. When I pull the motor for the 350, I may just check the Part # on my cam. BTW- I'm sure your car isn't slow either, but IT'S NOT STOCK, with your mods, even w/ a peanut cam, I'm sure it would be fast. As far as your car having the L98 cam in it... ??

 

Why are you so damn close minded? The reason for the difference in power between the 205hp motor and the 230hp motor is the dual cats. According to GM, the dual cats are worth a 12.5% power boost over the restrictive single cat.

Just for you, I'll break it down into simple terms.
205 x .125 = 25

205 + 25 = 230

There's your difference in HP. Don't tell me what I do and don't have, I have timeslips and the victories on the street to prove my point. That, and the fact that it pulls hard all the way PAST redline... I shift 1-2 at 5300rpm when racing.


The GM service manual was designed for dealership technicians working on these vehicles. IF THERE WAS A DIFFERENT LB9 CAM, REST ASSURED THAT IT WOULD *DEFINATELY* BE NOTED IN THE MANUAL.

 

When you look at performance difference, consider a few things...dual cat, automatic and 2.73s. Of course a 5-speed G92 will be faster. I would be stunned if it wasn't. It has dual cats and 3.42s.

Also, I cannot say for sure, but I would suggest the G92 probably has the same exhaust as mine. Stock (and I had it measured by a muffler shop with a caliper) I have virtually a 3" exhaust. It was just shy of 3" on the ID and 3" on the OD.

I found this out when I took the car in to buy a 3" cat back and the muffler shop said I already had one. He measured mine and a 3" catback and they were identical.

But the best way to resolve this is when you take your cam out, have it measured. You are right, GM does do some funny things. I think I am the ONLY person with a stock L98 GTA that has aluminum drum brakes. I have the code on my SPID and it was confirmed by GM of Canada's Vintage Services when they gave me a report on all my RPOs.

On the exhaust system, I have always been led to believe that the largest F-body exhaust on a 3rd Gen was only 2 3/4". Mine is not 2 3/4". I would be curious is some of the G92 dual cat 5-speeds got a larger than the 2 3/4" exhaust system that is suppose to be stock.

 

MrJ beat me to the reply...but I firmly believe that all LB9s got the L98 cam (in 1991 at least). If an LB9 from 1991 didn't get the L98 cam, then it was a fluke/screw up by GM (which is known to happen). Much like SOME 1987+ SBC blocks don't have a roller cam (which they are suppose to)...and SOME don't.

Also, as MrJ knows, there were some performance differences from car to car. The biggest difference always seems to be in the fuel pressure. There were some large production variances from car to car...but with some modding, those variances could be corrected.

 

h Well, I guess all TransAm and Z28 convertibles were screw ups then. They all had the "peanut cam".And MrJ, how do you explain dual cats adding 25 horsepower in 91 where in every other year it only added 10.The 25 horsepower boost is supposedly 15 from L98 came and 10 from dual cats.




------------------
1990 Trans Am GTA
Bosch plat+4 plugs,SLP plug wires,Hypertech coil kit,Fastchip,SLP 160 therm,T-body bypass,Breathless AFPR,ported plenum,SLP crankpulley,SLP runners,SLP flowbooster,SLP cold air,K&N,SLP 3"catback,SLP torqueconverter,SLP shiftkit,Mobil 1
14.3@96 stock
13.5@102 w/mods

 

Black5.7GTA took the words out of my mouth. Either the 305's are underrated at 205 HP, or there is something else to account for the 25 HP difference. Its not dual cats, because the difference between a dual cat and a single cat car is a 10 HP rating from the factory. 88 305 5-speed TPI = 220 HP, single cat. 89 305 5-speed TPI = 230 HP, with dual cats. 89 350 auto TPI = 230 HP, single cat. 89 350 auto TPI = 240 HP, dual cats. Why do you say dual cats are worth 25 HP in 90-92 cars? It just doesnt add up. And what I find REALLY surprising, is that in all this time, NOBODY has come forward and said they pulled out their 305 cam and measured it. What gives?

 

Interesting, people take the HP ratings from GM as gospel (and these vary from source to source), but not what GM writes in their 1991 Factory Shop Manuals?

Guess if you take your 1991 LB9 automatic into a dealership, they'll accidentally swap the L98 cam in since that is the cam the Factory Shop Manual calls for.

 

black5.7 and Kevin91z-THANKS FOR THE BACKUP!!
Guys-
It doesn't make sense to me either that there would be a 25hp difference with dual cats... come on! There were 2 different, cams I still believe(from '87-92). GM wouldn't just give the 91's one cam choice and the rest of the years give them 2 choices. I also do not believe that GM tells the truth. I do expect a difference between my buddies G92 car w/ 3.42 compared to my non-G92 with 3.08's, but that big of a difference is not do to his gears and cats only! NO WAY!!!!! It is way too much faster than mine to say mine has the L98 cam too. I still say they did make a PEANUT CAM IN '91-'92! I guess I'll have to check mine when we pull the engine next month. I'll post data then for sure. I still have seen other paper work and stats/data that says that 90-'92 5.0 autos/T5's could get the small cam, just becuz GM says different doesn't mean anything. They also say that they didn't make any 90-92 350TPI's with ttops, but we all know that isn't true either.
MrJ- I didn't say what you had or didn't have but I did suggest a few things. Even if you car has the peanut cam in it, with your mods it could still be fast! And just because you say it pulls 5,300 rpm really isn't valid because I pull about 5,200rpm's or so and I think I have the peanut cam. Plus our factory electronic tachs are NOTORIOUS for being off at high rpm's from what I've heard on message boards. As a fact before I switched my 120mph/6000rpm cluster for the 140mph/8000rpm cluster, my engine wouldn't go past 4750 rpm or so, but now it magically goes over 5,000rpm?!?!?! Either way, I never insulted your car or said it was slow, it is maybe fast(I'm not disputing that), but its NOT STOCK and I know that stalls and a shiftkit in L98/auto cars show good improvements. No hard feelings to anyone!

 

MrJ-
Also, which gauge cluster does your T/A have? What rear gears also? G92 perf.pack.? JG1 Aum DS? THX!

 

GTA91, what are the exhaust pipe dimensions on your car and the G92 car? GM did put different exhaust systems on these cars in 1991, more than just the single cat.

 

It has the 120 speedometer and the 4500/5000 tach. 2.73 posi rear. Non G92. Steel driveshaft. The stock catback and Y-pipe were the same size as a stock TBI 305 exhaust, that I can tell you for certain.


------------------
91 Trans Am WS6
Bright White
5.0 TPI auto
Flowmaster 3" 2 chamber catback
Trans Go shiftkit
2000 stall converter

supposed 'peanut cammed' car (yeah, right)

Built on Wednesday

 

If you keep your stock heads don't go any bigger than a 487 lift cam and don't use the 1.6 roller rockers that a cheep way of adding lift the stock heads can't flow more lift than that. opening the valves too far will make air flow worse and finally make your car slower than stock. call slp they will tell you what will work best.

 

MrJ-
If you have those gauges and such... that points to a peanut cam. I am still confused as to why you say your car has the L98 cam, just because it runs good? It has the 2.73's and steel shaft also? What are your timeslips and ET's? Let me know, I'm curious as to what you're running at the strip.

 

Also-
I have the small exhaust w/ 1 cat. I think its like 2" or 2.25", probably the same as my buddies '92 Formula TB car. I put a flowmaster on it though, and when I put the L98 350 in, I'm putting the Edelbrock headers and 3" w/ flow out the back.

 

the formulas "stock" (from gm) is 3" OD I know because I looked It up. not sure but I think 2 5\8" ID?

 

GTA91, are you now starting to see MrJs point for the difference in HP. The G92s had a bigger exhaust along with the dual cat setups like the L98 cars. On the ENTIRE exhaust system, I can agree with MrJ's accounting for the 25HP difference.

That is why the Vettes always have higher HP than F-Bodies, their exhaust system is more efficient.

Maybe there was cam differences in earlier years. I know the L98s have had a variety of cams over the years. But the fact is, according to GM's own Factory Shop Manual (which is far more accurate than any advertising brochure they ever produced) states one (count them ONE) camshaft for the LB9...and that is the same cam as the L98.

I have had a variety of GM Shop Manuals over the years for a variety of cars and they have ALWAYS listed any differing parts from one engine to another if there are any differences. I can ask a friend I know who works at a GM Dealership if their are any "addendums" to my Shop Manual. But I know from talking to him, unless there is an "addendum" or revision, the Manual is what REALLY is on the car. The brochures are the LEAST reliable of any source of info.

As I said, ALL brochures says a 1991 GTA L98 is a 4 wheel disk brake car. This is in fact false. I have aluminum drum rear brakes, something NOT stated in any brochure. But it is in my Shop Manual.

 

Best time to date is 14.9@93.5mph, on a 2.36 60 foot. Should be faster now, with the rebuilt tranny, shiftkit, and converter.

 

I looked it up in my shop manual, its for a 1992 Camaro, and it lists one cam for the 305 LB9 TPI. It also says the 305 cars are 9.1:1 compression ratio, and the 350 is 9.75:1. Crazy stuff. We'll never know for sure until several people pull their 305 TPI cam and measure it.

 

there is a diff in the cams some one here had a list on what cam was used in what even down to the police package and 1le cars and for each year

 

I figured that the G92's had bigger exhaust, but didn't think that made a 25hp difference. I guess that you guys are saying that my car has the L98 cam in it then, right? As far as comparing cars, it was my '91GTA 5.0TPI/T5/3.08/NO G92 compared to a friends '91Z28 5.0TPI/T5/3.42/G92. The only differences are the cats,gears,the pipe size, and possibly the cams. This car runs 100 times better than mine, even though my car runs extremely well I would say for having the crappy 3.08's. My car will run with my friends LT1/6-spd for quite a while,and he's run like 14.1's or so at the track. This '91 Z28 has supposedly beaten more than 1 LT1/6-spd though. BTW- there is another '91 Z28 G92 in my area with a 6-spd instead of a 5-spd, and it beats LT1's all the time. The only mods are a T56,K&N, and flowmaster muffler... but I forgot to mention that its a 1LE!!!!! There is a '9 Formula 1lE w/ 5.0/T5 in my area also. Both 1LE's are extremely fast, and this G92 Z28 of my friends is vey fast too. It just seems hard for me to believe that his car is that much faster just because of the exhaust and gears. The "seat of the pants" difference is very big, and although we haven't raced yet, he has spanked my buddies 5.0/T5 'Stang that runs at the door of my car. That would equal a spanking for me from the G92 Z28! Also, my car doesn't rev near as high as his either... this also leads me to believe that my car has NO L98 cam in it. I can't wait to see what I have when I pull the motor! I will be extremely pissed if my car has the L98 cam, but I honestly & really do not think it does. Oh well, I guess I'l post when I do, probably sometime in December. In the end though I'll be happy when I get that 350 in my car with a few mods, the buddy with the G92 Z28 won't know what hit him!Should I tell him I swapped motors? haha Later!!

------------------
'91 GTA:5.0-5-spd, chip, K&N,Flows,Coil,Air Foil, 350 soon to come!
'39 Chevy coupe
'52 Chevy p/u

[This message has been edited by GTA91 (edited November 20, 2000).]

 

From your description, I would say they are quicker than any stock L98. Now, if you consider the 45 c.i., the bigger valve heads, the higher compression and larger fuel injectors; they are making a lot of HP, more HP than the L98s.

SD L98s are not slugs. They were rated around 14.5 @ 95 by many magazines when they came out. The 5speeds were rated a couple of tenths slower. So they are obviously much quicker than the typical TPI 5speed car if they can beat a 14.1 LT1.

Either they have modded their cars or they got one of those rare fast 3rd Gens.

BTW, Kevin, in 1991 I have the same 9.75:1 compression ratio for the L98 but the LB9s have 9.3:1 according to my Shop Manual.

 

Glen-
Thats what I thought too. I was surprised taht I could hang with that LT1 forvery long either. All I know is that the G92 Z28 runs very freakin' strong and those 2 1LE's are unbelieveable. Thats just a 305!!! I've talked to a few guys w/ L98 SD cars that run very well. A guy in Ohio I talked with had a STOCK '92 L98 GTA with a B&M shift kit and ran a 13.9 1st time out... NO JOKE WHATSOEVER! I know how good my car runs right now with its high miles and poor gearing, along with a small cam possibly. I can't imagine how a L98 car like mine would run. I guess I may find out when I put that L98 in my car with my SD setup. What do you think my car would run with a stock L98 SD and a T5? What about with the future mods and cam?

 

**88 350 TPI FORMULA*************

I noticed you said you had a list where it showed 1LEs and B4Cs getting different cams. Can you email me man. I want to know more bro
thanks

 

1LE's and B4C's have the same cam as LB9's and L98's do. There is no special cam for them.