I want to change out my 305 4bbl(87conv Iroc)for a bigger engin which will be a everyday driver.I want some performance and I have a 327 out a 66 corvette but people are telling me to go bigger 383 or 406(for real power). What are my limites?

 

Go buy a 350 block, get a 383 rotating kit for it, AFR heads, etc.

While you're putting that together, ship the 327 to me.

Limits? Like the old saying goes: "How fast do you want to go? All it takes is money."

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/LB9 block, ZZ3 cam and intake, WP 305 heads ported & polished, Hooker headers & y-pipe, 3" Catco cat).
57 Bel Air, my 1st car. 0.030 over 396, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.

 

How big of an engin can i go without tearing up the car? (The 383 is my first choice)


[This message has been edited by scott87conv (edited February 22, 2001).]

 

Scott

All GM SB's are the same dimentions. So A 283 to 434 ci Sb's will fit w/o any problems. To elaborate on The cost issue. Do you want to spend $500 or $10,000. Cost is a big factor on performance. You have to look at it this way, Good parts and maching work costs $$$$, I am building a 408 (i.e. 400sb bored.040 over, 408.7ci actually), this winter I already have $3000+ in it, Thats just machine work and parts. And its now even together. Look at your finances and how fast you want to go.

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82 Firebird,355,Cam 224/234, .466/.488,TH350 Tranny,650 HolleyDP,Hooker Headers(I.E. POS) Manual steering
Best 8th et 8.62@80mph.
NEW for 01
A 408,dart iron eagle heads,street dominator intake, 750 SD,cam 229/239, .497/.520, Also a big hole in the hood.
Shooting for 12's.

 

I think what you're asking is how much power you can make before you start breaking things on the car. The answer is, just a little bit over stock. 1st thing you should do is beef up the suspension, which means subframe connectors (could be "issues" with a convertible) and poly bushings. The rear could use some help, see the tech articles on that. Then if you can't get any traction with your newfound power, consider LCA lowering brackets, tubular torque arm, etc.

 

Five7Kid thanks for the info,it looks like i need to get some suspeneion work before i get the engin installed.

 

Hey, no sweat. You didn't mention what tranny you have, but some upgrades to a TH700R4 would help it live as well. If T5, then perhaps you take it pretty easy off the line, or consider a T56.

When should I expect the 327 to arrive?

 

i know i'm a little late with this but why not give the 327 to a moderator and gets some thirdgen.org bonus points? the 383 would be a more logical choice for your car and you could sell the 327, or give it to me. i know for a fact 5.7 kid has way too many 327s laying around the garage now.

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ICON Motorsports

1st & 3rd

 

Thanks ede and five7kid, i think i will hold onto the 327 for a project a little later.You both have been a big help and i will keep you updated on the 87conv project.

 

If only it was so. I've offered many times to take them off people's hands, but no response to date...

 

forget the 327 great engine yes, but then theres no relacement for displacement!! do a 406 roller you wont be dissapointed!!!!! forget the 383 even! well....you could make a 327 into a 383 i guess!!! just put a 3.75 stroke crank in a there ya go a 383 stroker!!! but by all means build something better than a 327!!!

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1989 firebird formula

Mods: converted from T.B.I. to a carburator 305 to a 350. Flowmater exhaust,hedman shortie hedders,202 160 (882) heads,.447/.447 lift 222@.050 duration speed pro 327/350hp cam 350 .40 over (356) edlebrock performer rpm intake and a 600 edlebrock manual choke (1405) Proform H.O. distributor slightly revised 700r-4

Future mods comp extreme energy roller cam, world products sportsman 2 heads, msd 6al ignition, billet distributor, blaster 2 coil and a 406 engine is in the works soon!!!!

 

if you do have the T5 go with the 327. it has HIGH RPM's. i wish i could get my hands on one. i would replace my lowly 5.7 and kill anything on the street. as long as you are FORGED and FREE FLOWING HEADS. you will kill. just make sure the intake is open also. and no puny exhaust. it is all a combo. one bad link and you are out. so make it all work together.
if you have the A4 go with displacement. your tranny wont allow such high range as would a manual so go with the 383 or 406 or even a 377( 400 block with 350 crank). just have fun with it. and build it to last dont go cheap.. it will kick you in the a$$ later if you do.
God knows i keep thinking about buying a destroking kit and making a 302 like the 67 camaros. and being able to rev to 7000. but that would involve a 3" stroke. and i think i am going to stick with a 355. its easy and replacable. so its all good, have fun man.

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1990 IROC-Z L98/G92 350 TPI
5,507 IROC's; 2,415 5.7L IROC's Produced in 1990

DAILY DRIVER: 1991 S10 2.5L/5SPD WITH CAMARO RIMS
MUSTANGS...ONLY 4 LUGS....HAHA THAT IS HILARIOUS.

 

Thanks for all the comments. I will take my time and do this one right. I have a 700R tranny and i know that will need some work if i keep it. Thanks ( I really like this site)