How big?
Thread Starter
Junior Member
Joined: Mar 2001
Posts: 4
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From: Jackson,Tennessee,USA
How big?
Ok guys I know you have been discussing boring a throttle body to 2 inches, may not work. So what is the max that you can bore it out? 48mm? Can the Edelbrock tbi manifold be bored to match? I know a guy that may pull his in favor of a carb, if this can be done may want to get it from him. Also would it be beneficial to port the manifold? Thanks in advance. Mike
Supreme Member
Joined: Jul 1999
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Ok guys I know you have been discussing boring a throttle body to 2 inches, may not work.
---
yes it will. Turbo city does it.
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So what is the max that you can bore it out?
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2"?
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Can the Edelbrock tbi manifold be bored to match?
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don't think so. walls too thin.
---
I know a guy that may pull his in favor of a carb, if this can be done may want to get it from him.
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lol carb = no more HP (if stock), less MPG.
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Also would it be beneficial to port the manifold?
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dunno
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------------------
-Tas
'89 Formula WS-6
[soon to be Torch Red with black hood and headlights =) ]
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....
Super GRK_Taz World
EFI & Intake Options
AOL IM: superGRtaz | ICQ 82881207
---
yes it will. Turbo city does it.
---
So what is the max that you can bore it out?
---
2"?
---
Can the Edelbrock tbi manifold be bored to match?
---
don't think so. walls too thin.
---
I know a guy that may pull his in favor of a carb, if this can be done may want to get it from him.
---
lol carb = no more HP (if stock), less MPG.
---
Also would it be beneficial to port the manifold?
---
dunno
---
------------------
-Tas
'89 Formula WS-6
[soon to be Torch Red with black hood and headlights =) ]
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....
Super GRK_Taz World
EFI & Intake Options
AOL IM: superGRtaz | ICQ 82881207
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Joined: Jul 1999
Posts: 2,184
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From: Tempe, AZ
Car: 92 RS, 02 Tacoma, 2 73 Porsche 914s
How far can the stock unit be bored?
answer: 2" if you add material, i havent done this yet, but have heard of guys jb welding the back of the tbi before boring.(that was on crossfire tb)
if i were you, i would go 48mm. That will leave the back wall VERY thin, like 3mm if that.
bore than manifold?
answer: get a spacer. dont worry about boring the manifold, only minimal gains from doing that. just use a spacer.
[This message has been edited by snflupigus (edited March 05, 2001).]
answer: 2" if you add material, i havent done this yet, but have heard of guys jb welding the back of the tbi before boring.(that was on crossfire tb)
if i were you, i would go 48mm. That will leave the back wall VERY thin, like 3mm if that.
bore than manifold?
answer: get a spacer. dont worry about boring the manifold, only minimal gains from doing that. just use a spacer.
[This message has been edited by snflupigus (edited March 05, 2001).]
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