I have a friend wanting to soup up his 92 3.1L v6. To help advise, I need more info. I need cam specs, valve size, head flowbench data, CR, CFM flow of intake, etc, etc, etc. Anything you have would be helpful, I know jack about these engines. Thanks.

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[This message has been edited by Jester (edited September 10, 2000).]

 

I dunno specs sorry... *points to TomP* Maybe he knows?

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89 RS
305 TPI...

Previous:
2.8 s/c'd firebird

 

*looks around nervously* Who, me? I don't know many specs on the 3.1.. hell, do I know any? Hm. All I can think of is that the 3.1 has a one-piece rear seal (started in the 60 degree blocks in 1985). I don't even know the compression ratio!

The heads should be the same as the 2.8, as would be the intake's flow specs. It seems the 2.8's "High Output" heads arrived in 1984. They then lost the "HO" designation in 1985. I don't know of any other changes. Fiero 2.8's might (that's -might-) have heads with larger valves, but I'm not sure. I think their throttle bodies flow more, but as I'm aware, I don't think anybody's flow tested a 2.8/3.1 TB.

-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards

 

140 hp. 180 ftlbs.
valve size. 1.6 intake 1.3 exhaust.
3.3 inch stroke 3.5 inch bore.

tell him to put in a cranecompucam, 2 1/2" carback, K&N cone intake(custom build it with PVC pipe) shift kit, pulleys, and a custom chip for the cam,he will have to custom make headers, or modify 3.4 camaro/firebird headers for the 4th gens...... 3.73's..........or if has has ballz try a 4.10! should be running low/mid 15's after all this.

 

damn i wish i could do all this to my 3.1l haha i just dont have the money

 

CR = 8.5:1

That's all I know.

 

damn bumping threads that are 9 years old

 

I'm kinda glad this came back up. I wasnt searching for it but it remined me what the valve sizes were LOL. I would like to know the exact stock cam specs though.

 

Hi, That is hard to find.. U can look and if U R lucky U can find some information.. I have it somewhere but can't seem to put my hands on it.. Anyway I did find this information on an 1993 Beretta Type (T) engine, which I believe is Generation 2..
I have an 1995 Gen 3 Type (M) automatic that I am planning to restore..

 

Why was this brought back again?

 

Hi, Because I just joined 3rd Gen. and I found the question of someone looking for specs for the OEM Camshaft and I did Not see any answer or response.. So I found some information and replied with a link to this information.. What's the problem??

 

Look at the dates, the thread was started 13 years ago, then for some reason replied to again 4 years ago.

These are referred to as "dead threads" and should be left that way.

You also did not add any new information which made your reply pointless and unnecessary.

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