[Wareagle]

Originally Posted by ponjohn

Think there is any power to be had if he went up to a 3" exhaust?

Could be but for Hillclimbs etc. a little back pressure could help .

[Bigger is Better]

Originally Posted by ponjohn

Think there is any power to be had if he went up to a 3" exhaust?

I think old school standards would say yes but I dont think I have seen anyone/supplier really build an "equation" for a X-Pipe system which shows both pipes to each bank at some point (most just show one graph). I have a custom stainless system that we put the x pipe as close to the collectors as we could. Hindsight I might have gone 3inch to the xpipe then 2.5 inches.

I think the numbers are pretty good, certaintly on the high side of what Dave and I originally discussed so I am thinking (hoping) I didnt leave much on the table.

[ta man]

When I first drove my new combo which is similar to yours I had a 2 1/2 inch x pipe on it.Then I switched to a 3 inch x pipe through my same 2 1/2 inch ultraflos and tailpipes and it felt stronger. Just the pipe volume is a huge difference when you compare them side by side.

[Wareagle]

Heres a 3 inch system --does look big .

[ta man]

Looks like crap too!I used a pypes 3 inch crossover to replace a pypes 2 1/2 inch crossover,really easy swap and zero ground clearance issues.

[Cliff R]

Pontiac large cid engines respond well to a 3" "H" or "X" pipe system over 2.5". For the most part, it really doesn't seem to matter what's after the mufflers. I've never done any back to back dragstrip testing, just too difficult to mess with that sort of stuff at the track. I do know that my car's track performance improved significantly after upgrading, but difficult to say exactly how much, as I made several other changes around the same time......Cliff

[Wareagle]

Originally Posted by ta man

Looks like crap too!I used a pypes 3 inch crossover to replace a pypes 2 1/2 inch crossover,really easy swap and zero ground clearance issues.

The guy that was selling this actually put a 3 1/2 inch system in his Supercharged GTO -Pontiac power of course .

[Silver Judge]

Congrats on winning the hill climb @ Kelowna Johnny.
Wow, those KRE heads are looking better all the time, great performance !

[Wareagle]

Just did this up on Google Earth for KNOX Mtn. road hooks around the pic .
Again Congrats Johnny - on the WIN.

[Wareagle]

Heres a pic of were my friend races his T/A's in SWITZERLAND - You'll see the HILLCLIMB Road that snakes out of Reitnau.
Johnny did you get any vids done up yet for this years KNOX MTN . .

[Wareagle]

Heres a cool pic were SDRoger will be racing at their HillClimb ( Reitnau ) - should have the 70 RACE T/A ( 71 T/A ) There - lets keep this thread going -- what TRANS AMS were ment to do .

[David Jones]

Awesome video of a cool ride.

[Wareagle]

A cool vid of SDRoger [ 70 RACE T/A ] getting together with some of his race car friends .
http://www.youtube.com/watch?v=h2RICT-wOwU