I should of posted this in the first place. IM haveing someone rebuild my motor. Im getting new heads, cam, and pistons. Now I dont know much about what works best with the 305tbi. That is where I need the help. 1-Im down to 2 diff. heads, SB-Chevy S/R Torquer 305 heads or Edelbrock centerbolt heads(like njspeeder). 2-I was thinking LT1 or LT4 cam, unless someone knows a better compucam. Pistons I dont know much at all. I was going to get new ones to support NOS if in the future. Any help would be great! Along with anything I forgot or need to think of. THANKS!

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92 Firebird
305TBI, Edl.Tbi Perf.Manifold, Full exhaust, Mac muffler, air intake, 16" wheels.

 

for the love of God don't rebuild a 305 and then expect to get big power from it. rebuild a 350 or something.

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-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

Soon to be installed:
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz

 

Amen TAS!

Bt, if you must rebuild a 305, stay AWAY from that lt4 cam. Damn, that thing is not even ground right for a stock LT1. Too damn big. Just stick with a compucam, one of the low end boosting ones as you will be giving up some serious low end off the line torque with that buildup. I am talking about the kind of torque that when your cruising in 2nd or third around 2000 rpm, blip the throttle and it puts you in your place without waiting till 2500 rpms. You will give that up both of your cam choices.Either way make sure you get gears in the rear end to compliment you new motor's breathing ability and keep it in the sweet spot for the best results.
Jerry

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1989 Lt. Blue RS 5-speed
355 crate motor, Compucam 2040,
PST Front suspension,
Hotchkis rear suspension,
EDL T.E.S., 3" Flowmaster
Harwood cowl hood

1994 Black Z28 6-speed
Nothing major, but FUN!

 

If you get a copy of Camero Performers Magazine- Summer 2001 page 68 They are doing a build up of a 305. They used World Heads and a cam from Comp Cams. The hp gain with the heads alone was 51hp.

Also Chevy High Performance Magazine August and September 2000 did a buildup of a 305

A TPI or TBI 305 is not as bad as people as people think. It is not that hard to get a 305 to be 300hp.


Ronald

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85transam 305 TPI 210hp

 

LT4 cam should be fine. LT4 Hot Cam is too much for a 305.

 

I am wondering if a Torker II could be made to sit atop the Vortec heads...?wouldnt that be better than a dual plane (fuel injection doesnt rely on vacuum pressure)

 

Shane B put a torqer 2 on his 350 Vortec. I'd get the weiand version though. check the post with the guy asking about a carburator in the title. The weiand small single plane is the same money and has more material on the wall if you wanted to grind on it for a bigger TBI. the Torquer 2 wall is thin,and is angles inward towards the top.

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-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

Soon to be installed:
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz

 

Well I made my mind up. Im selling my car and getting a 4thgen TransAm. Thanks for the help though!

 

lol, sellout

 

Thats your option.. but I personally like
the 3rds better than the 4ths.. the only
4ths I really like are the fully decked out transams, just the plain firebirds dont really catch my eye..
Should have just gotten a 350crate motor and through that in there

 

Ok, well Im keeping the 3rdgen in the family. My did is going to buy it from me when I find a 4thgen T/A I like. Best of both worlds!

 

Click here

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1992 Pontiac Firebird
- 305ci V8 TBI / Automatic Trans / Loaded
- MODS: Edelbrock 14x3 Open Element Air Cleaner, Dual outlet exhaust