Quote:
Originally Posted by Lee
You went from one transverse system to a different transverse? What is the best ANYONE has ran with a transverse? Every time I've heard of somebody going from transverse to a quality true dual, they have gained performance.
I refer back to my testing earlier this year, documented at http://forums.maxperformanceinc.com/...d.php?t=814803
This was a very mild motor. Very low compression, mild cam, un-ported heads, Performer intake, Q-jet. HP peaked at just 4500rpm.
Yet a full 3" exhaust made a rather significant increase in both HP and TQ, I doubt my motor would break 350hp at the flywheel, yet the exhaust made a substantial difference in performance.
With a similar exhaust system to my own (and giving the EFI computer time to re-learn) I believe FunRide's car will gain AT LEAST 30rwhp, maybe closer to 50. |
Little more going on there.
For starters, the PS rules dictate a stock style exhaust system must be used, with the only exception allowed is upgrading to 2 1/2" pipe.
In other words, my 70 Formula has to maintain it's transverse system.
The other factor I was getting at was the muffler itself. The Flowmaster transverse is still a large case chamber muffler, the same muffler everyone says kills HP.
The Pypes transverse is actually a dual muffler system in disguise. If you look at it's design, each pipe is a straight through design and separate from each other, with it's own packing, it's just wrapped up in a single case package. Each pipe continues as it's own. It's not even close to being like a real transverse muffler system, yet it's in a transverse package that provides excellent ground clearance on these vehicles that were really never designed to have mufflers hanging off the floor boards.
As far as how fast people have gone with it??? I've seen quite a few in the 10's at 125+ mph. It's an excellent transverse system. However at our power level (1funride and myself) it's not worth anything over the Flowmaster transverse. Been there done that.
Would it pick up with a 3" system??? Maybe, but rules dictate 2 1/2" in my case. Besides that, it wouldn't be an honest comparison between mufflers if the pipe diameter was change too. 1funride isn't going to see any gain with the exhaust system whether he sticks with transverse or a dual muffler setup, unless he increases the pipe size. My car is an excellent example of that with about the same power level.