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need some advice.

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Old Apr 6, 2009 | 11:37 AM
  #1  
noboostnogo's Avatar
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From: Mechanicsville Virginia
Car: 1989 Turbo Trans Am gta
Engine: 383 78mm turbo
Transmission: Th350 rmvb with brake
Axle/Gears: 9 bolt 3.45s
need some advice.

So my goal is to go 11s. high, mid, low 11s makes no dif. The fastest so far is 13.4 @ 99mph w/ 1.8xx 60ft with the 700r4. I was able to get a 1.7xx 60ft but missed a shift.


My current setup is pretty basic, 350 block stock bore, flat tops, 64cc iron heads,1.6" rr, a hydraulic roller cam 212/218 @50 ~.500 lift,6a msd, cheapy summitracing brand shorty heades and lt1 intake conversion with the tpi computer. 3" borla catback, gutted out cat, t56, 3.73, adjustable torque arm, LCA, relocation LCA, KyB shocks, 275/50r15 mickey thompson
My comp. is around 9.5:1

I plan on:
1- replace Fuel Injection with a carb.

2- replace my badflowing heads with pro-comp 190cc 64cc aluminum heads.
http://cgi.ebay.com/ebaymotors/Small...Q5fAccessories
3-replace headers with shorty 1 5/8"

4-replace cam with bigger one

5- replace dizzy with http://cgi.ebay.com/ebaymotors/Chevy...1%7C240%3A1318

My Qs are

1- should i go with an air gap intake mani or victor jr mani?
2- should i mill the 64cc heads down to 58cc or 60cc or 62cc?
3- will a 750cfm double pumper be enough?
4- what cam specs would i benefit from? hydraulic roller? flat tappet?
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Old Apr 6, 2009 | 05:48 PM
  #2  
noboostnogo's Avatar
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From: Mechanicsville Virginia
Car: 1989 Turbo Trans Am gta
Engine: 383 78mm turbo
Transmission: Th350 rmvb with brake
Axle/Gears: 9 bolt 3.45s
Re: need some advice.

i was recommended milling the heads down to 60cc, 750 carb was ok, and the comp cam XR288HR, and air gap

what do you think? where would that get me? it will be a weekend car mainly and run on 93 octane

Last edited by noboostnogo; Apr 7, 2009 at 01:53 PM.
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Old Apr 7, 2009 | 01:54 PM
  #3  
noboostnogo's Avatar
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From: Mechanicsville Virginia
Car: 1989 Turbo Trans Am gta
Engine: 383 78mm turbo
Transmission: Th350 rmvb with brake
Axle/Gears: 9 bolt 3.45s
Re: need some advice.

ttt
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Old Apr 7, 2009 | 02:03 PM
  #4  
91interceptorZ's Avatar
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From: boise, ID
Car: 91 B4C "police special service"
Engine: L98 494hp
Transmission: tko-600 on order
Axle/Gears: 3.23 true trac
Re: need some advice.

Originally Posted by noboostnogo
i was recommended milling the heads down to 60cc, 750 carb was ok, and the comp cam XR288HR, and air gap

what do you think? where would that get me? it will be a weekend car mainly and run on 93 octane
which heads....don't mill the heads...yes it will increase your compression ratio...but it ruins the head quence (spelling, sounds like kw-inch), and your better off buying the correct cc head to start with and not messing with that......better cam good....like AFR heads would be good....I prefer fuel injection myself..I use a Ported HSR....If your under lets say 10.8 to 11:1 ratio you can run premium...with fuel injection anyway..I don't know about carb with that compression ratio.
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Old Apr 7, 2009 | 06:30 PM
  #5  
noboostnogo's Avatar
Thread Starter
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Joined: Nov 2007
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From: Mechanicsville Virginia
Car: 1989 Turbo Trans Am gta
Engine: 383 78mm turbo
Transmission: Th350 rmvb with brake
Axle/Gears: 9 bolt 3.45s
Re: need some advice.

what kind of pistons are you running? and whats your compression?

Originally Posted by 91interceptorZ
which heads....don't mill the heads...yes it will increase your compression ratio...but it ruins the head quence (spelling, sounds like kw-inch), and your better off buying the correct cc head to start with and not messing with that......better cam good....like AFR heads would be good....I prefer fuel injection myself..I use a Ported HSR....If your under lets say 10.8 to 11:1 ratio you can run premium...with fuel injection anyway..I don't know about carb with that compression ratio.
i would keep fuel injection but ive been having this random problem with my car and ive replaced every sensor and relay there is and still nothing. It bogs down when warm and i give it some gas, i have gone through everything twice. new everything including dizzy plugs wires, all new Intake mani. gaskets incase of a vacuum leak, new injectors.

The cam im interested in is the XR288HR and heads are the procomp 60cc 190cc.

would that be a good combination with the 350 and flat tops??

Last edited by noboostnogo; Apr 7, 2009 at 06:53 PM.
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