I never mentioned the L27, it was never in an F body.



There are too many probably'*, and "we talked about it" etc going on here. No one out West has one it, so the only way to know for sure is to get some dyno time...

I'm with Bonne Me MN on this, but wouldnt 3" press bent pipe be alright cause it would be narrower in the bends and there is a lot of bends under our car, not to mention the 180* one just before the muffler.

Keep in mind that BonneMeMN has a "non-supercharged" car.

Any of you that are willing to do it, by all means, go with 3", with dyno before and after.

I know of an L27, an L36, and an L67 (series1)that have gone to 3" and regret it now.

We have several cars in the 13'* now. What are they running?

I never said an L27 went into an Fbody. I was suggesting that an L67 is going to have some serious scoot in comparison to your car, whether it'* 2.5" or 3" exhaust or not.

I have TOG headers with a 3" flex joint into a 3" cat then a reducer to 2.5" into the resonator, thereafter the stock intermediate pipe at 2.5" into a Dynomax Super Turbo muffler with 2.5" inlet and outlets.

There is absolutely no way I would consider a larger intermediate pipe until I'd be well into the 12s.

Cheers,

Exactly what I'm talking about. You can't argue with success, and Foghorn is one of our 13-second cars. Nobody without MAJOR mods has successfully "3-inched".

Until someone proves experience wrong, it'* an extremely bad investment, especially for the L27, L36, and S1 L67.

dang i guess i opened it up to much from the sounds of this, ok then, i was thinkin of adding a glass pack up stream to knock a bit of the sound off any way, what if i used a 2.5in to choke it down some say about 30-36in long? and yes most of my build ups have been V8 and some 4cyl stuff. this is my first venture into the V6 area.
ok back to the orignal question should i get the 2.2in pulley or?

Oh i know that it would have more scoot, but it was without a doubt, a major improvement over even stock levels.

On l27 hell no, but a pulley'd l67 sure.

If I were you, I'd get the CAI done first. Then, after that, I see no reason why you couldn't go to the 2.2". Oh, and when you do, you're gonna love it...

No. Not on a pulley'd L67. On a Headered, cammed (or rockered), pcm'd, intaked, intercooled Series 2 L67, MAYBE. At some point, yes, but not until you're in the 12'*, as Foghorn stated.

Exactly. 92/93 should go 2.2", but also upgrade the SC idler to the larger ZZPerformance idler to improve belt wrap around the SC pulley and keep the stock belt length. You will lose performance going from 2.2" to 2.0" unless you intercool or water inject. And water injection may not be enough.

To fix your exhaust, a 2.5" glasspack in the intermediate pipe may help. You need to really discuss this with an exhaust expert, or start a new post in Performance with a detailed description of your exhaust (and pics if possible) for us to team up on in order to find a solution.