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Need some initial tuning advice

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Old Sep 9, 2010 | 04:32 PM
  #1  
Artisan's Avatar
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From: Warrior AL
Car: 89 Iroc
Engine: 350/Dart heads/hotcam/TPI
Transmission: T56
Axle/Gears: 3.45 9bolt
Need some initial tuning advice

OK I am puting together a 5.7 L98 to replace my LB9. I have a LOT of mods done to the car. What I am wanting to know is what chip can I use or is there a chip that I can run at least for now that will drive OK and halfway idle right.

Here is what I have:

350 with GM Hot Cam and 1.6 roller rockers, porfessionally ported Dart Iron Eagles heads (72cc) 200 cc intake. Port matched to a felpro 1205 gasket. I have seriousely opened up a stock intake, just almost exactly to the 1205 gasket. The intake is ported all the way through and siamesed 3 inches in. I am switching to a set of ported and fully open/siamesed runners. (8 tubes made into 4 tubes). Ported/siamesed plenum stock throttle body with air foil, ( a set of LT1 injectors and a set of L98 corvette injectors which one will be better?) , screenless maf, gutted airbox with Hawks ram air Boxs, Edelbrock ses headers with 3 inch flomaster Y pipe, 3 inch exhaust into a magnaflow mufffler, EGR block off plate, Smog Pump delete, and pully kit. I am also running a T56 Transmission. The Vats have been defeated and it has the cooling fan switch comming on sooner.

So would a chip for a manual corvette work for now? The car is a factory 5 speed TPI.

Thanks for any help on this.
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Old Sep 9, 2010 | 11:33 PM
  #2  
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Re: Need some initial tuning advice

Probably want to get a chip cut for this. It's really too far from stock to use a production chip. You may be able to get away with it using FP adjustments but at the same time I would think it to be very ill advised. That's a huge increase in both head runner volume and cam size. I would also suspect strongly that with those heads you're going to find the stock injectors and maybe even the 24s inadequate.
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Old Sep 11, 2010 | 09:39 PM
  #3  
Artisan's Avatar
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From: Warrior AL
Car: 89 Iroc
Engine: 350/Dart heads/hotcam/TPI
Transmission: T56
Axle/Gears: 3.45 9bolt
Re: Need some initial tuning advice

Originally Posted by Drac0nic
Probably want to get a chip cut for this. It's really too far from stock to use a production chip. You may be able to get away with it using FP adjustments but at the same time I would think it to be very ill advised. That's a huge increase in both head runner volume and cam size. I would also suspect strongly that with those heads you're going to find the stock injectors and maybe even the 24s inadequate.
I can appreciate what you are saying but at least for the short term I was hoing to get the thing running with out starting out with a custom chip. It may be the only way.
I am hoping for around 330 rwhp 380rwtq . For noW I JUST NEED TO GET IT RUNNING.
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Old Sep 11, 2010 | 10:12 PM
  #4  
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From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: Need some initial tuning advice

stock manual corvette L98 chip should be a good starting point, but ideally want to make some adjustments to it before running it.
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