lthlcamaro

Hey i was wondering if anyone here with a stock 305 carb can spin thier tire / tires on dry road from a stop?

EvilCartman

iTrader: (1)

When I drove my car home after buying it, it was bone stock with 4 flat lobes on the cam. That sucker still just bearly spun the tire with 3.08 gears. Had no power above 3500 rpm though lol. Now I can spin both at half throttle

RB83L69

Mine's not stock any more, and won't do it any more, due to better tires and suspension work; but when I got it, with the POS Goodyear 215/65-15s on it, it would smoke them both all the way through first gear and halfway through second.

I'm glad it won't do that any more. I don't miss it one bit.

five7kid

iTrader: (14)

My carb is a stock 305 piece.

I can spin the tires on dry pavement. :lala:

85_ZED28

I can spin 'em, the 5 speed helps though

RedDragon

Me too. (It's an automatic as well...)

blacksheep-1

Uhhh. why wouldn't you be able to spin them with a 305, it's all technique.
For instance have you ever smoked the tires on a *****?
It's easy, lock up the emergency brake, and drop that front drive pig in gear and hammer it, you leave 2 long black stripes from the rear tires.
Like I said, technique.

George

1983 no power LG4, with 100K miles - oil rings and valve seals shot. 3:23 gears

With 235s it will spin them fairly good. With 275 KDWs it will spin them a bit on most surfaces.

MrDude_1

but how do you do it on a rear wheel drive car with less power then a **** burner?


of course i can brake TQ my car..... but its not the same as being able to punch it from a roll and smoke the tires.

SLP IROC-Z

iTrader: (1)

itll take a lot more then a stock 305 carb to be able to roast em from a role with nuthing other then matting the gas. my 89 is a 13 second car i can roll in first and mat it and just get some wheel hop outta first caue its lowerd with stock lcas and the like. when it was stock height and engine it wouldnt either. dpends alot on tires my new toyos are great they hook real good on the street.

Air_Adam

When I got my car, the dead L69 had no problem lighting 'em up. The 350 in it now has even less trouble.

kfoley

From a role... not even close, stopped.... yes if I dump the clutch at about 3k. Of course I have 255 tires and my clutch doesn't grap well from a dump.

Oh ya, LG4, 3.23 posi, T5 (busted currently, but WC T5 on it's way)

I'm building a 500hp 404 soon here... don't think I'll have any problem with that motor... just hope i don't blow the tranny and rear...

lthlcamaro

Thaks for the responses - but i am saying like from a stop w/o using the e-brake. And also my car seems to bog down a bit. What may cause that? On wet pavement it is no problem but on dry thats a different story - nothing - can anyone tell me why?

lthlcamaro

RedDragon, How many miles are on your car? I also have an auto with like no power. Will a semi-clogged catalytic converter cause some of the power loss. Where can i get a catco (i think thats what there called) catalyitic converter? - oh yeah and i have 2.73 gears. (probably answered my own question here hey?)

Berlinetta82

I have the exact same problem as you, lthlcamaro, we need to figure this out lol.

I can barely beat my buddies neon(2.0 four door 5spd) and I cant spin the tires on dry pavement. It wouldnt spin the 215/60 and obviously wont spin the 235/60's.

Auto as well.

08141980

I have a 3800 (Buick 3.8 Turbo) TTA

I can spin them also :lala:

Berlinetta82

08141980, some how I dont doubt it....

gilley's86

My 86 305 can do it with a little help from just the brake, not the e-brake. I don't consider it too bad for it having 190,000 miles on the original engine, and no overhauls, just valve guide seals and a new alternator.

lthlcamaro

Berlinetta82, glad to hear i am not he only one with this problem. If someone knows why let us know!

Berlinetta82

Please do.

Jproz1167

iTrader: (3)

I have a little input here, my 82 trans am had the 4 barrel LG-4 bone stock, had the awsome 2.73 posi rear end, and yes the car lacked the ability to spin it's tires on glare ice, after switching to TPI, edelbrocks headers, flowmaster catback, and 373's and a five speed, it does extremly well now and has absolutely no trouble torching its tires, second gear start (except on a hill) it can do without a problem.

here are a few things I found while doing the conversion ... stock LG-4 exhaust manifolds have a opening of 1 3/4 inch, the factory Y pipe which I section has a inner liner to it, where bends are made this inner liner collapsed in a few areas, the LG-4 is a low 8.5 to 1 compression engine, 32 degrees max timing, and the cam is pretty lousy as well, however I left it in the car, since I want to build a nice 406 for it, the very early catbacks were also a design disaster.

the LG-4 can run if you let it breath, before the TPI I had a edelbrock intake I believe a 2701 which help the car above 2500rpm, the next thing I did was add a 86 cat back exhaust that helped it alot.

so far with just tpi and edelbrock headers and flowmaster catback, twin electric fans, serpentine belt, and 373's the power increase makes the car a blast to drive compared to what it was before, my next step is to try and port and polish the induction system and make a ram air system for it. will probably never take the car to a track, but will try and run it on a dyno to see what kind of improvements I've gotten from the mod's

hope that helps you a little to get a few more ponies out of your LG-4's

blacksheep-1

While we're at it does anyone know if the LG4 and the L69 (HO) exhausts are the same?

Zepher

iTrader: (1)

I was able to roast my tires up with my 86 LG4. I think having a 5 speed helped out a lot.
Here is a classic video from 2000,
http://www.transamws6.com/video/86WS6.mpg

RB83L69

LG4 & L69 exhausts are very different. That is one of the major reasons for the LG4 being such a slug.

George

I think the later LG4s (85 / 86 etc ) got flat tops pistons as opposed to the dish jobs in the earlier ones.

So the LG4s did improve somewhat but I think the heads were always a major problem as well as the cam.

Zepher

iTrader: (1)

This is a piston from my 86 LG4,

blacksheep-1

I'm freshening up a 84 L69 for my 83 Z28, it has flat top pistons as well, did only the L69 have flat tops?
RB83L69..tell me more about the differences in the exhausts, please.
Zepher.. that doesn't look good.

Zepher

iTrader: (1)

Piston ring(s) fell apart from running super rich for 6 weeks.

83 Z28 HO

MY K&N'd only L69 H.O. can and WILL spin the living hell out of its tires, but they are the 20 year old original tires, and they MUST be replaced soon . Whens its dorve a lil more.

lthlcamaro

So from what i gather in these helpful posts here is that to increase power a bit you need to let the motor breath more. So if possible dual snorkel air cleaner, headers, possible a custom y pipe, cat, and exhaust? Will that help free up a few more hp?

Zepher

iTrader: (1)

For an LG4, carb, intake, open element air cleaner, headers, 3" catback will wake it up a lot.
This was my old LG4,


I didn't have headers on at the time. Did that when I went TPI.

RB83L69

L69 & LG4 heads were always the same. That's not among the differences.

Look at the exhaust in the pic; notice the 4-olt flange at the cat with the big oval pipe; the Y-pipe is that size and shape frome where the 2 banks join, to the cat flange. The LG4 one is 2¼" round in that place. The L69 head pipes are 2¼ whereas the LG4 ones are 2". The exhaust manifolds are different. The LG4 has 2¼: through the car all the way back to the muffler, and 2" tailpipes; the L69 has 2¾" to the muffler, and 2¼" tailpipes. The LG4 had the old highly restrictive pellet-bed cat, at least for its first few years; the L69 had the honeycomb catalyst. The brackets for the one won't even fit on the other.

Other than the fact that every single piece is radically different, they're just about the same.

Best way to wake up the LG4 is the exhaust first; every single piece, from the heads to the street, as a unit. DO NOT get ANY part that will work with your stock LG4 exhaust. Get a set of chassis-specific headers with their included Y-pipe, such as Edelbrock or SLP; and a cat and cat-back exhaust for some other motor, such as a TPI 350.

The next thing it needs is a cam. The Comp XE256 and XE262 are very good choices. Use the greater one only if you have a 5-speed or a loose (not stock) converter, and a better set of gears than what came in it.

Gears are next. The best gears that came in LG4 cars as standard were 3.23s. Most of them have 2.73s. 3.42 or 3.73 make a HUGE difference.

Then get yourself a dual-snorkel intake. The stock L69 intake is a good choice if you can find one. Cold esterior air is better then hot underhood air, so avoid an open element in favor of a cokd-air system.

blacksheep-1

Are you sure the LG4 and L69 heads were the same? I always thought that the LG4 had smaller valves.
FYI here's what I'm building, it's a budget 83 Z28/ 305 with 85,000 miles on it. It is in great condition, so I freshened it up with a set of rings and bearings, The cam is a Clevite #229-1730-s2019
SPECS: I-.420 204@050 on a 107 degree ctr
X-.443 214@050 on a 117 degreee ctr
I trimmed the heads and am using a thin head gasket to bump the c/r to 9.6 (no big deal, but I was there so why not) from 9.5
I can't do the header deal right now so I'm using the 305HO (L69) exhaust manifolds w/o cat and a flowmaster system (that's why the questions on exhaust).
The tranny is a T5 5-speed
The rear is a 7.5 with a 4.11 posi.
The suspension is Koni struts, shocks, springs and sway bars, and I've boxed the trailing arms and built an adjustable panhard bar.
The tires are 17X9.5 with Z rated goodyears from an SS
I may spray it in the future, but then who knows, and I'm going to install subframe connectors since it's a t-top car.
I don't think I'll have over $3,000 in the car when it's done (I paid $400 for it, the body has a couple of dents, but NO rust)
I'm removing the A/c since it's not my primary vehicle, it's just to have fun with, maybe autocross a little and keep the Hondamitsuyotas at bay.

RB83L69

I'm positive. The heads are the same.

They both came with 416 casting, 1.84"/1.5" valves. Indistinguishable, identical in every way.

That's a pretty common cam, it's in almost every cam grinder's catalog. It's about the same as the L69 cam, should work OK. Still, if I was doing it and spending money and all that, I'd get something a bit hotter than stock.

blacksheep-1

Well I didn't want to get too carried away, I'm using the stock computer and q-jet. If I decided to get frisky later on I could put 1.6 rockers on it.
I-.448 204@050
x- .480 214@050
Again. I'm using almost stock exhaust so the results will be limited. By the way, I have all of the stock dual snorkel ram-air stuff for it.

Jproz1167

iTrader: (3)

blacksheep

I think your making a grave mistake running 4.11's .... I have 373's right now and 2nd gear starts seem to work the best, when taking off in 1st gear it's just to low and tire spin is a major problem now, I'm sure yours will be quite a bit worse, and even with 373's my car should run with or beat a h.o powered car with ease.

how much does it cost to run a car on a dyno, I'm very interested in seeing what my simple mods have done.


here is a LG-4 manifold and it's awsome 1 3/4 inch outlet

Zepher

iTrader: (1)

Dyno runs for non-tuning generally run $50-$100 for 2 -3 pulls.
Tuning on the dyno is $100-$125/hour with you supplying the tuning.

sorch60

Umm... I'm running 4.10's with a posi and I'll tell you what, it's all about how you drive it. If you know your car well you car get a hard launch w/o lighting up your tires and beat the pants off any stock 305. Otherwise, with a little footwork you car also roast your tires.

Anyway, my 87 LG4 Camaro with a carb running on 7 cylinders can keep up with one of those Si Civics, and yes it does spin tires and generally well. No, it wasn't my fault it was on 7 the kid I bought the car from put on new wires and apparently couldn't push the boots all the way onto the plug.

Oh, my other car with the 4.10's is a '83 HO Trans Am and it can spin tires in the first 3 gears before and after I put in the 4.10's, with the stock T5 and taching it up less than 4000 RPM.

SLOWFIVEOH

iTrader: (2)

Mine will light em up...I got a built trans and it will Bark 2nd too.... Ohh But new motor will be in within 2 weeks....Then I hope to chirp 3rd!

blackgold84

iTrader: (1)

i can burn fine, so much fun on the u turns, chirps second and sometimes third, go to my web page and youll see proof of my burning burn out pics that was a fun day i left some markings on the pavement

SLOWFIVEOH

iTrader: (2)

Dern, this post is back from the dead! Since then I finished my motor swap, She'll roast em from a roll now, Break sideways hitting second and chirp third. Now I need a megashifter,Cause shifting with the stock auto shifter cut down 2 inches, sucks!