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TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

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Old 07-13-2006, 12:51 PM   #1
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Car: 1986 Olds Cutlass Supreme
Engine: 350
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stock TBI with a big cam?

Im gonna be buying back a TBI camaro I sold to my friend last year. I want to drop my 350 right in and use the stock TBI setup if possible. Buts it got a big cam, 234/242, .539/.558. I just want to know if the stock TBI stuff and computer can be tuned to run decently. Im talking a 13.99 tune. For the amount of money I put into the motor I might as well reuse it than sell it for a fraction of what I spent, so dont try to talk me into using different setup, I dont have the money. my only other alternative is an Edelbrock 600cfm carb and regular dual plane intake. Plus I love the choppy idle it has.

So, either it can be tuned, or it absolutely cannot. Whos got the answer?

Last edited by Shake Zula; 07-13-2006 at 12:54 PM.
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Old 07-13-2006, 03:48 PM   #2
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It most certainly can be tuned, but I wouldn't try it without learning the ropes on a stock setup first. Also with a cam that big the stock code is a little lacking, actually with that cam you're going to have to accept some limitations. Lucky for you Rbob's new EBL fixes all of this, the alpha-N mode will pretty much eliminate the need to fool around with MAP filtering at idle.

I tuned a 218*/226* cam on a completely new engien combo with no prior experience and it was difficult. It took me 3 evenings worth of tinkering to get it moving under it's own power and a week to get it to the point that I wasn't afraid to pull into traffic. It took me almost 6 months to get it "right". I can get it "right" in about a week now. So most of that time was spent learning how to tune the computer rather actually tuning the motor.
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Old 07-13-2006, 04:15 PM   #3
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Two of my friends are pretty good at tuning, thats why Id like to keep the TBI. No way I could do it myself.
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Old 07-14-2006, 07:59 PM   #4
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I second that answer - Do it! One thing I ran into was lack of fuel on the top end though, so be prepared to get bigger injectors or up your fuel pressure.
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Old 07-14-2006, 07:59 PM
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