cruzplcs

I been had my 1988 camaro 5.7 iroc for about 2 years now and i want to upgrade the engine and have more power. my idea is to rank up to 400 HP or under but keep it TPI if not change to carb Plz Help. the only add on i have right now is a edelbrock intake manifold and runners. Im willing to spend 5000 or more.

vetteoz

iTrader: (13)

Good luck

Build a 383 with HSR intake.
Easy 400+ Hp

InjectorsPlus

iTrader: (1)

What Vette Oz said.

For that budget, you can buy a nice long block by an experienced builder and drop it in.

dspencer24

iTrader: (3)

there are people putting out 400 at the crank on here specially down in southern ca. But they have alot of money and time invested in there parts to do so. they are working on trying to get 400 at the wheels now.
If you put
bigger heads
xfi 280 cam
some 1 3/4 headers
holley steath ram
and get bigger injectors
and a tune i bet you would be pretty close to that with money to spare.

Or just buy or build a 383 like the others said

watson90z

iTrader: (1)

dito what they said 383 is the way to go

Stephen

iTrader: (12)

With a $5000 budget? Go LS. More power easier + lighter weight +++ good gas mileage while doing it.

If you wanna stay L98? Put a 383 long block under the stock throttle body, runners, intake & plenum & you can get your 400hp (and over 500ft lbs of torque!) With a little intake work, you can bump that towards 450hp with the sacrifice of some torque.

Seriously though....With a $5000 budget? LS1/2/3.

Or snag ya a LQ9.

d2harris

Is there no way possible to get 400 rwhp out of the stock block with bolt ons? Or do you have to go 383 to make that kind of power? I am planning on doing some work to my stock L98 during the winter, and found this thread.

Stephen

iTrader: (12)

What I listed was hp at the crank, on a dyno.

300 rwhp is doing good for a TPI. I doubt 400rwhp could be achieved at all, for TPI.

One a LT1/shortram/or any of those other intake are put on, it is no longer a TPI. TPIs biggest restriction is that what power it can put out, comes at the sacrifice of high rpm power. But lets be honest......Short of racing? How often do you go about 3000/4000 rpms? For a street car...Very rarely.

VincentZ28

iTrader: (2)

We have a guy here in SoCal with a stock block made 397whp@6300 in his 91Z28. He did it with a Stealthram, 280XFI and AFR's 195.

Stephen

iTrader: (12)

It is basically a LT1 engine now. No longer is it a TPI. No wonder he hit the 400 (397, close enough) for rwhp.

burnout88

This year one crate motor with a stealth ram will put out 410 hp at crank but not at the rear wheels. It's a vortec headed 355 with a hot cam.

http://www.yearone.com/serverfiles/f...archid=4868310

Orr89RocZ

iTrader: (20)

400 on crank is fairly easy with TPI...even 350's.

400whp is a far greater challenge...definately start 383 for best chance and ditch TPI.

355tpipickup

iTrader: (5)

i have a SR for sale that would help you get there if your interested!

cruzplcs

so with the 383 long block i have to make it carb then, and what bout the rear gears any ideas on that? it has to be street legal im a daily driver to.

Stephen

iTrader: (12)

What car is it? Toss the FI & go carb & there goes true legality for the street.

cruzplcs

so with the 383 long block i have to make it carb then or keep it TPI , and what bout the rear gears any ideas on that? it has to be street legal im a daily driver to. im going wit the 700R tran from monstertransmission.

cruzplcs

I am planning on doing some work to my stock L98 during the winter, and found this thread.

What type of work are u planning on your L98?

dspencer24

iTrader: (3)

your gears wont keep you from being street legal. auto trans it seems people like the 3.23 I believe

Stephen

iTrader: (12)

Street legal = TPI, no (legal) way around that.

For a daily driver rear gear, I'd keep it in the 3.23-3.42 range. I've had a 3.73 rear gear, but the car wasn't a daily driver and it had a T5 manual transmission.

For the easiest rear axle upgrade, grab you a 98-02 F-body rear axle. You'll be bigger than stock disc brakes + better calipers + a better center section. Its a win-win-win mod.

cuisinartvette

Go for a ride in someones built TPI once you feel what 450-500 lbs of torque feels like I bet you wont care if the hp# is 3.5

Torque is what the TPI is all about, more of that you make the hp is automatically going to increase and become whatever it is anyway.
I say stroke it, good heads and the a ported superram or TPI system youll love it.

cruzplcs

So what your saying just go with the carb its the easiest way to go.but then i have to make a switch for the fan dont I?

Stephen

iTrader: (12)

How what I not understood? Your not clear on the English language?


NO NO NO.....And to make sure I'm understood.....NO! Stay TPI! Stay TPI! Stay TPI!

Your car will not be street legal anymore, if you switch to a carb.

A stock fan is 100% independent of Fuel Injection or carb. It 100% relies on a thermal switch that screws into an engine, or the aftermarket fan setups use a probe that fits in the fins of the radiator.

Orr89RocZ

iTrader: (20)

One of the fans is on the thermal switch..the other is programmable via ECM chip control

cruzplcs

Ok i think im asking way to much from a 350 engine to reach 400 HP and still keep it TPI so what is the most power i can get from it? not including the steathram and mini ram im not that much of a fan of those intakes?

DAREDEVIL 1

with a 5 K budget. i see no problem getting this out of a well build 350 TPI !!

The power is all in the internals and 100% THE HEADS, CAM and EXHAUST !!

But its a waist of money IMO..because for way less u can buy a 383 on e-bay NEW !!!!

dspencer24

iTrader: (3)

I think he is better pulling his motor and taking it to a good machine shop and have them do stoke it to a 383. You hear alot of horror stories from people buying engines off internet that arent new crate engines with gm warrentys. Also its a great learing experience for you and your car.
Rebuild and stroke your engine = maybe around 2000 or less depending
buy good flowing heads can be had for 1000 give or take a few 100
buy hsr or super ram or ported tpi 1000
and spends rest on exhasut and little things 1000
Or go ls

Stephen

iTrader: (12)

ARGH!!!! What did I say in Post #6??? (hint...A L98 is a TPI)

If you put a STOCK TPI (intake, runners, plenum & throttle body) on a 383, with the right heads, cam & tuning, can get you 400+horsepower & 500ft lbs of torque. http://xtremecarzone.com.au/index.php?showtopic=386

cruzplcs

ok thanks stephen for all your help and for the link to it help alot. ill just stay with the edelbrock intake since i already have it and for the tuning i can go with the painless wiring? would that help me. and maybe in the long run ill go with the big mouth system. ill go with the same head and cam that they use on the link you provided me.

vetteoz

iTrader: (13)

Changing the wiring is going to do nothing for the tune.
You will be up for a custom tune no matter what head/ cam / wiring setup you run ( unless you put a carb on it )

cruzplcs

what kind of tune do I have to do? sorry for the questions i just want to get all the info before i start working on it. what type of heads do you recommend and cam for this set up.

DAREDEVIL 1

I would recomend an enginebuilder !!!!!!!!!

it will safe u in the end !! BIG TIME !!!

Orr89RocZ

iTrader: (20)

please dont build a 383 and shove stock TPI on top.

remember, 400 on motor is easily doable...400whp I dont think anyone has done that here yet without a power adder or ridiculously modded welded/ported TPI that would cost 600+ dollars to do just the PORTING and a extremely well matched cam/heads package. It would be far easier to build a HSR/Proflo setup or find a used miniram.

DAREDEVIL 1

TPI porting , + shiping 350-400 bucks and very good...WORKS 100% !!!!

dspencer24

iTrader: (3)

yes exactly why put on something stock and that can barely breath on a 350 on an air hungry stroker. If anything port the heck out of your aftermarket tpi that you already have and use that that way you can save money on buying a new intake, But can can find good used hsr set up for cheap as well. Either way your horsepower and torque will go up if matched properly

VincentZ28

iTrader: (2)

What we found with the Stealth Ram is that you will lose lots of torque. We have one guy in SoCal with a Stealth Ram, AFR 195 and 280XFI on a stock L98 short block made 397whp@ 6350 and 350wtq at 5000. But another guy running a 355 made 393whp@5750 and 414wtq@ 4800 with a Super Ram, 280XFI, weld up manifold fully ported, runners are not ported and Trick Flow heads 195 semi ported.

So which way would you want to go?

DAREDEVIL 1

I dont know how the dino's work in cali, but a 383 with a stock intake made 390 HP and 405 tourge @ 4950 RPM !!!! Oh, in Florida !!

( on the flywheel )

VincentZ28

iTrader: (2)

That goes to show you a 383 is not necessary in most cases. It's a waste of money if you're not going to let it breathe.

Who out there has a 383 TPI making over 400whp with out power adders? I'm talking about using a TPI style manifold.

DAREDEVIL 1

I understand, but a stroker kit is only ~ 800 Bucks....how much do u need to spend on a 350 to make 380+ HP and that much tourge ?????



So then if u port the intake for lets say 400 u got 1200 in a 450+ HP 383....without any other mods.
JUST SAY'N

VincentZ28

iTrader: (2)

Ok $800 more to build a 383. $600 more for major port work for 355. Which on is more impressive? Depends on which intake system you use you will not make that much more torque. Its cheaper to build a 350 over a 383 and make the same amout of power. All the cars in SoCal have stock GM short blocks parts except for the pistons making 375+ whp. Most other people are trying to do the same thing but spending major money on forged internal and it's an everyday street car. So know who is spending the most money?

Oh yea! By the way, most of those people are using Long Tube Headers. We are using shorty headers an all the smog equipment hook up. Those people deleted the smog. Now what!

Orr89RocZ

iTrader: (20)

Superam ported out aint bad, but its a PITA to work on IMO. I hated taking TPI apart, stealth ram was tons easier. Single plane even easier

But above is right... stock crank and rods arent really stressed at sub 6000 rpm levels. You can just upgrade pistons with a fresh hone or overbore if it needs it and have a decent bottom end on the cheap suitable for sub 6000 rpm operation yet can support a great deal of power. Not a bad way to go about it. 383 will need new crank and likely rods as I'm not a fan of 5.7 rods on 3.75 crank. just my opinion there but can certainly be done.
383's do make more torque and that can be worth it. 355 vs 383 can make same power with same cam/intake/heads, but 383 will do it at a slightly lower rpm and make more torque. Should make more average power and run faster...but again...kinda dependson the complete package build.

My 383 HSR was doing 392whp and 371wtq running over 200 deg on 90 deg shop air....heatsoaked all over. Torque was dropping off last 3 runs while still adding fuel to make it near 13 to 1 air fuel. Cooled down it was over 400whp/380wtq for sure. That is PLENTY of torque. Ran mid 11's at 118mph

KiLLJ0Y

iTrader: (1)

this is not directed to anyone who has posted or the original poster.. but a general observation!!!

i seriously dont see why people have to hit this "magic 400rwhp" number...

whats the point? Do you need it for a drag only car?
Is it needed to race in a certain road racing league?
Is it so you can swing your dong around and say you have a 400rwhp TPI?

i find it also funny that these same people who shoot for a certain high horsepower engine cheap out on things like GOOD STREET TIRES, GOOD SHOCKS (not cheap stuff like KYB or TOKICO)
you have these high HP engine cars but the car acts like a pig, not to mention the fact that the average enthusiast cant even use all that power even when they have it, they cant drive because they are not racers..

take a step back.. look at what the car will spend most of its life doing, then build it..

sorry, im off my soap box now..

VincentZ28

iTrader: (2)

Well for the original poster, for 5K he can build a complete mid to low 12 second car with used parts and do the trans, gears and suspension.

DAREDEVIL 1

Stock exhaust on 383 , no headers or such !!!

cruzplcs

how much $ did u spend on your camaro.

cruzplcs

well the reason im doing it is to show it off and do sum street racing in ca i got tried of those creap *** honda acting like they own the street and show them what real chevy power is know for.

cruzplcs

I show the setup u had on ur red camaro im just wondering how much $ did you spend on your car?

VincentZ28

iTrader: (2)

Its kinda hard to say. Every engine parts was bought over a 15 year period new. 1997 Super Ram amd manifold $700-$400, 2002 Trick Flow Heads $895, Stock short build except for forged pistons $1500, 280XFI $300, All port work $650. So far $4450. All this stuff you can buy now for dirt cheap used for about $3000.

Now the transmission will be more money and is needed depends on which trans you have $1500 for auto, $300 for Clutch(T5).

$450 on suspension. $200 on LSx front brakes. $1800 on wheels and tires(free if you can get a girlfriend to buy them for you like I did).

The money can add up very quickly. Some people has spend at least $12,000 up to $17,000 on their 3gen because they want everything brand new. Some people cut corners because they can do their own painting, labor, swap parts with other people and bought parts used for cheap.

$300 on Inland Impire Driveshaft

$850 on gears and posi and cover.

$7950 up to now.

Just got the car painted $2000 with some emblems.

I say about $10,000 over a period of time which includes labor.

So for $5000, what do you want to spend it on and include labor cost if you can't do it yourself?

VincentZ28

iTrader: (2)

The most you can get is about 355whp with just AFR 195, 268XFI, Fully ported TPI and the power should peak around 6000 meaning the manifold has to flow 300cfm's or more. About 370whp with a manual trans. I know this for a fact because i"ve seen it done. Just throw this stuff on the engine thats in your car now and enjoy.

SiCkRs

iTrader: (6)

You can swap in a ls1 with t56 just find a parts car, or if your located in cali heres a guys selling his front collision z28 with a ls1 and t56 for $2000 and just do some mods and youve reached your level.

cruzplcs

im ok with 355 HP i can do lil damage with that kind of power dont u think so with a lil work on the rear gears and sum edelbrock header to make to flow better would give good push. bcuz i know bout car but cant do the work myself. lol its the cheapest way to go. one more question do i have to port the edelbrock intake and runners or just the plenum? instead of the AFR can i go with the edelbrock heads