PPE Engineering LongTube Headers
Joined: Oct 2003
Posts: 2,729
Likes: 84
From: Owings Mills MD
Dssyline, is PPE having a non-stepped header made for you? I decided to ask them if they'd done any more testing on a DE and they haven't. But I was told a non-stepped header was being made up for testing to see if it would make a difference on a DE. Even on the HR there is a slight dip at 3500rpm. I have a feeling aggressive cams will pair well with these headers.
I upgraded my exhaust to 2.5in piping up from the 2.36in before now using a G37 factory option muffler (IPL muffler).
Plan to go to RT tuning next week for a couple of pulls to see if my exhaust change made a difference before the non stepped headers arrive.
The reason I changed my exhaust is the test SG did with their headers on pg 5.
http://api.viglink.com/api/click?for...13317326115571
My dyno looks similar to the 1st one with the inefficent 2.5in dual exhaust and coast fab headers.
Last edited by Dsskyline; Mar 14, 2012 at 09:58 AM.
dsskyline, good luck on that exhaust change. wishing the best for you. What Y pipe did you go for? One funny fact i just realized is that everyone (SGM's test car, gabe3d, prgdriver, kacz07, 512_z) with SGM or PPE on the DE/HR are running MD's XYZ including you now, what a coincidence.
Joined: Oct 2003
Posts: 2,729
Likes: 84
From: Owings Mills MD
dsskyline, good luck on that exhaust change. wishing the best for you. What Y pipe did you go for? One funny fact i just realized is that everyone (SGM's test car, gabe3d, prgdriver, kacz07, 512_z) with SGM or PPE on the DE/HR are running MD's XYZ including you now, what a coincidence.
Also every exhaust was 2.5 or higher I'm hoping sasha was correct that 2.5 dual would of made more with a tuned x-pipe.
The dyno 512z did was with the stock HR pipe he had very little lowend loss compared to me.
I can handle a 3-5hp/tq loss down low not 15-20hp/tq.
My new exhaust with a IPL muffler
Last edited by Dsskyline; Mar 18, 2012 at 10:00 PM.
Nice exhaust. Any reason why you stuck with using cats? Smog test?
A turn of events may be coming my way, for the better, but may delay my install of the headers since I want to do everything at once. By this weekend I may secure myself a spare set of heads. If I get them I'm gonna completely rebuild them with over sized valves + port work. The goal will be to try to break through the 300whp mark!
A turn of events may be coming my way, for the better, but may delay my install of the headers since I want to do everything at once. By this weekend I may secure myself a spare set of heads. If I get them I'm gonna completely rebuild them with over sized valves + port work. The goal will be to try to break through the 300whp mark!
Look at the pic again, those are cats half way down the exhaust. That's what I was referring to.
Joined: Oct 2003
Posts: 2,729
Likes: 84
From: Owings Mills MD
Correct they are flat mufflers made by hushpower for clearance. I haven't had cats on my car since 06.
Joined: Oct 2003
Posts: 2,729
Likes: 84
From: Owings Mills MD
Idle and cruising yes, but at WOT it's completely different.
