Vortech TBI?
Thread Starter
Supreme Member
Joined: Dec 1999
Posts: 1,934
Likes: 1
From: Calgary
Car: 89 Formula
Engine: 350
Transmission: TH 700R4
Axle/Gears: 3.27
Vortech TBI?
Okay, the incredible slowness of my car is
really getting to me, 305 TBI auto- I see ads for used Vortech heads in the paper and figure they'd be a good deal.
1. What casting numbers do I look for (don't want 305 heads)
2. What mods need to be made to adapt to my engine?
3. Would I need a custom chip?
4. can I use 1.6 roller rocker?
thanks, I'll print responses and save them.
------------------
88 IROC the best RS ever made!
well except for the B4C
really getting to me, 305 TBI auto- I see ads for used Vortech heads in the paper and figure they'd be a good deal.
1. What casting numbers do I look for (don't want 305 heads)
2. What mods need to be made to adapt to my engine?
3. Would I need a custom chip?
4. can I use 1.6 roller rocker?
thanks, I'll print responses and save them.
------------------
88 IROC the best RS ever made!
well except for the B4C
Supreme Member
Joined: Jul 1999
Posts: 4,310
Likes: 1
why wouldn't you want the 305 heads? they bolt right on. the 350 heads need to be milled to go on a 305 with stock pistons. the 305 Vortec was rated at 230 Hp. the 350 Vortec truck was rated at 250Hp.
------------------
-Tas
'89 Formula WS-6
[soon to be Performace Red =) ]
305, TBI, auto, 14x3 chrome flat based open element with K&N, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....
Super GRK_Taz World
EFI & Intake Options
AOL IM: superGRtaz
ICQ 82881207
------------------
-Tas
'89 Formula WS-6
[soon to be Performace Red =) ]
305, TBI, auto, 14x3 chrome flat based open element with K&N, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....
Super GRK_Taz World
EFI & Intake Options
AOL IM: superGRtaz
ICQ 82881207
Senior Member
Joined: Sep 2000
Posts: 840
Likes: 0
From: Crystal Lake Il
Car: '98 Z
Engine: LS1/6
Transmission: 4l60E
dont get the 305 heads, theyre **** compared to the 350s. By the way they are vortec heads, lose the H as they are not a supercharger company 
. Mill the 350 heads .045 and you will maintain compression. They are 418 dollars assembled from jim pace GMPP.
------------------
91 RS W/carbed 350, Vortec heads, performer rpm, Comp cams Xtreme energy 280 grind. BFG Drag radials. 3.42 posi,Corvette servoed 700r4, ****ty stock converter
13.24@104
. Mill the 350 heads .045 and you will maintain compression. They are 418 dollars assembled from jim pace GMPP.------------------
91 RS W/carbed 350, Vortec heads, performer rpm, Comp cams Xtreme energy 280 grind. BFG Drag radials. 3.42 posi,Corvette servoed 700r4, ****ty stock converter
13.24@104
Thread Starter
Supreme Member
Joined: Dec 1999
Posts: 1,934
Likes: 1
From: Calgary
Car: 89 Formula
Engine: 350
Transmission: TH 700R4
Axle/Gears: 3.27
305 heads hmm....maybe. Gotta be better then
the crappy TBI heads I have.
Unfortunately i live in Canada, so $418 brand new heads from a dealer cost $950.
Used is typically $500...looks much more appealing. Sorry about the Vortech----Vortec
thing, I knew something looked funny!
------------------
88 IROC the best RS ever made!
well except for the B4C
[This message has been edited by 871LEIroc (edited November 13, 2000).]
the crappy TBI heads I have.
Unfortunately i live in Canada, so $418 brand new heads from a dealer cost $950.
Used is typically $500...looks much more appealing. Sorry about the Vortech----Vortec
thing, I knew something looked funny!
------------------
88 IROC the best RS ever made!
well except for the B4C
[This message has been edited by 871LEIroc (edited November 13, 2000).]
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