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Old 12-22-2020, 09:57 PM   #1
JoeCool108
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Default Possible new Class build - need opinions

I have the chance to buy a 1989 Camaro 5.0L TBI with an auto. Looks like Its a natural O/SA car. Its a street car with no title and missing some interior parts, but I can buy it cheap.. Can this combo be competitive?
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Old 12-23-2020, 07:04 AM   #2
Glenn Briglio
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Default Re: Possible new Class build - need opinions

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I have the chance to buy a 1989 Camaro 5.0L TBI with an auto. Looks like Its a natural O/SA car. Its a street car with no title and missing some interior parts, but I can buy it cheap.. Can this combo be competitive?
The cam and heads aren't the best. Better combo is the 1990 5.0 TPI rated at 241.Better heads and camshaft and intake manifold.
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Old 12-23-2020, 07:20 AM   #3
Billy Nees
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Default Re: Possible new Class build - need opinions

I almost built one of these. It's so bad on paper that it's the kind of thing that I would do. Small cam (which doesn't seem to matter, lots of small cam 305s going fast),weird intake runner and not-so-good intake manifold. It makes tons of torque in a street car. I think that Tom Reese ran this combo for a while but switched to PFI combo.
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Old 12-23-2020, 08:18 AM   #4
JoeCool108
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Default Re: Possible new Class build - need opinions

I wonder if the 6 cylinder would be better, or maybe even an earlier year with a carb instead of the TBI? PFI might be better, but harder to find this cheap..Guy only wants 600 bucks for a complete car.
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Old 12-23-2020, 08:26 AM   #5
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Default Re: Possible new Class build - need opinions

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I wonder if the 6 cylinder would be better, or maybe even an earlier year with a carb instead of the TBI? PFI might be better, but harder to find this cheap..Guy only wants 600 bucks for a complete car.
I guess that this would all depend on what you're comfortable dealing with. There's plenty of info available on any of the V8s so are you more comfortable with a carb or FI? With the 4 or 6 cyl., you're going to be pretty much on your own.
For $600, I'd be buying the car anyway. Check the lower cowl and the rear frame and wheelwells for rust.
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Old 12-23-2020, 10:07 AM   #6
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Default Re: Possible new Class build - need opinions

Iím attempting to complete a 6 cylinder project, but Iím concerned that I canít get enough HP out of the cubic inches available. Basically I donít know that I can get to 1.3 hp/cubic inch to mathematically get to the index. I would think it would be much easier to run a 302 V8 which is factored the same as my V6. They already have 30% more cubic inches, no mind the additional torque.. Either way I guess Iíll still be able to bracket race it on Saturday night..
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Old 12-23-2020, 10:53 AM   #7
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Default Re: Possible new Class build - need opinions

The hurtle with TBI is injector size. Once you get to the point of needing more fuel there is nothing larger available. Am sure the TB will flow plenty of air fuel demand needs to be overcome.
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Old 12-23-2020, 12:23 PM   #8
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Default Re: Possible new Class build - need opinions

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. It makes tons of torque in a street car..
That thing will move a full sized Caprice with no problem.

I'm sure it will run under in P/SA.

You have to maximize torque and then set the car up for it. (Small tri-y headers, etc.)
You might want to invest in a dyno test so you can figure out the converter and gearing...unless you're really good at this ;-)
Go for it...
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Old 12-23-2020, 10:43 PM   #9
JoeCool108
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Default Re: Possible new Class build - need opinions

So question, if its a natural O/SA car and you say it should run under in P.. is it safe to assume it will also run under in its natural class and its "Light" class?
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Old 12-23-2020, 11:17 PM   #10
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Default Re: Possible new Class build - need opinions

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So question, if its a natural O/SA car and you say it should run under in P.. is it safe to assume it will also run under in its natural class and its "Light" class?
Just do the math... 13.15 vs 13.45

O to P , a full pound break, thus 210 pounds for three tenths.
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