isy_nismo

iTrader: (1)

Hi, I just wonder witch one will suit better for my 350z 2006 rev up, with amuse r1 muffler +y pipe, 75mm throttle body, 75mm intake tube, modified intake and future cams and bigger inyectors.....which one will be better.....

terrasmak

iTrader: (8)

PPE long tubes, they will perform the best

Chinky4U

+1 on what Terrasmak said. It's been proven to yield amazing gains...untuned. Tuned, with your set up, even more gains are to be had!

isy_nismo

iTrader: (1)

Thanks for the info....I will go for the PPE.....I'm thinking to get the stainsteel option without the crome coating and I will wrap it up....

RobPhoboS

What about if the car is on test pipes already, is there any difference then ?

03threefiftyz

iTrader: (25)

I've had both....the Tomei's are very good. PPE will make a little more power, though.

RobPhoboS

Thank you for the clarification, another slightly daft question - why is that ?
As I'm guessing the test pipes are the same diameter at the exit for the Tomei.
I have no hard-on for one or the other, pure curiosity at the moment

MicVelo

Rob, I don't have SPECIFIC experience with headers on a Z however....

There is the old time adage/theory/maybe-maybe-not saying about the diff between short tube and long tube headers:

Short tubes = improved low-mid range gains

Long tubes = improved mid-high range gains

Again, do NOT know how much these general characteristics apply on Z car (good or not-as-good) but something to keep in mind when selecting.

One thing that seems to stand out (at least to me) is that the PPE are supposedly designed and built with equal length tubing from port flange to collector. That could contribute to the "betterness" described above. Not sure about the Tomei V2s.

My particular question - semi-related - is: what are real world/dyno gains, if any, that can be had with shorty headers (like the Tomei) running through stock cats (and a modest lower restriction catback, in my case, S-Tune). NOT that I'm looking to go headers (as I've always felt that gains on the street are modest given the amount of time and money invested), just curious. Anyone have before/after dyno on that?

RobPhoboS

I appreciate the input, I guess I'm just a bit baffled as to why if the shorties are on test pipes what the difference would really be
I'm thinking of going either, possibly long tubes as there is a fabricator here in the UK that's made a set or two already but to support the JWT C2 (+spring kit) cams.
I'll do water and oil pump (RevUp fits?) to, plus timing chain and tensioners.