2004Black350z

iTrader: (37)

What sound are you looking for? Maybe i can give you some advice and nudge you the right way

doshoru

iTrader: (3)

The reason I'm asking is that in the g35driver thread, the guy that was testing the PPE headers noted that they were definitely different than the ones for the 370z. Visually, the location of the stepping was different. There was also a huge loss of power down low (30+ ft-lbs) which is as of yet, unexplained.

KA24DE

True, but the difference between equal length and unequal is less between shorty and long tubes. I will never put a set of shorty headers on my car. Long tubes are better power producers (over a large rpm range) compared to shorty headers.

The reason DEs don't make power from headers?
Cams
The headers made are shorty headers, not long tubes (better scavenging, more peak/overall power)

512_Z

iTrader: (1)

Yeah my headers took a little longer when i ordered it to fix the stepping so we would have to wait and see hopefully make more gain. lol

doshoru

iTrader: (3)

Don't forget to weigh them! Weight reduction is important!

512_Z

iTrader: (1)

Yeah for sure i will weight them.. this saturday will be the install day with everything stock and later will provide results with Y pipe and exhaust..

doshoru

iTrader: (3)

bumpage!

512_Z

iTrader: (1)

Doshoru sorry man been a little busy and weigh them at 18lbs on a home scale LOL

will be installed tomorrow and ill weigh them againin a better scale...

SoCal07HR

iTrader: (17)

This has been a long time coming. You said the car is going to be dyno'd before with the stock exhaust then after with the headers. Are you going to be getting it tuned as well? All this is happening today? I'm waiting impatiently.

512_Z

iTrader: (1)

yeah sorry for the hold up been really busy with work and school. so i went to the shop where i was going to install the headers and one of my buddies wasnt done fabricating some work so he had to use the lift...


i posted a little copy of the before dyno pulls and it was pushing 276 HP stock with just Injen Cold Air Intakes. my goal now is to try to get around to it by the end of the week.. Sorry man but will post a few pics of the fitment and the way it sits with the header and a before and after vid clip.. not going all out in making a nice vid since i dont time for that...

denchan350gt

iTrader: (4)

Those look identical to mine. I have to get my dyno redone found out my lowend issue was my floormat under my pedal. I had a dyno done last week locally and there were no lowend losses compared to before headers and cams on the same dyno.

I'm going back to the original dyno next week that showed the losses to be sure.

0jiggy0

iTrader: (13)

Floormat under the pedal? WTF?

denchan350gt

iTrader: (4)

on the G coupes there is a retaining ring that holds the floor mat place. Mine is missing so it allowed the mat to slide under the pedal preventing the correct voltage to go WOT fully.

Here are dynos from 3 differents shops RT and CIN tried to tune out my loss of power, but the floor was slid under the pedal.

The Hill's dyno done last week is with the floormat removed. The blue line is before I added PPE headers/ JWT S1 cams on their dyno.

I had momentum shorty headers/ ART pipes before.

Voboy

iTrader: (58)

any nitrous on the latest dyno?

denchan350gt

iTrader: (4)

Here is the original same day before and after dyno and pics to compare mine to 512 Z's headers.

same day before and after with headers. I'm going to RT next week to make sure my issue is resolved. Seems that way from the Hill's dyno.


comparing to before cams and LT headers before was done back in 2009


My headers the design is different from the 370z headers especially after the collector just like 512 Z's

denchan350gt

iTrader: (4)

no I didn't want to risk it due to my tune possibly now being off. I will retune at RT next week if my lowend issue is solved hopefully.

Here is my current nitrous dyno comparing N/A, Zex nozzle and NX nozzle.

512_Z

iTrader: (1)

what year is your ?


been super busy and still wating for shop to clear a car out to install.. only day i can intall are tuesday.. CAnt wait...

nice dynos and pics..

denchan350gt

iTrader: (4)

04 5AT G35 coupe if I was 6mt I might of made 300 on hills dyno.

Mods before anyone asks

06 revup airbox w/k&n filter
Z1 3in MAF housing
Samco intake tube
DMK intake (ported lower collector, lower plenum, and raised top) http://g35driver.com/forums/intake-e...-manifold.html
JWT S1 cams (with HR valve buckets)
UR crank pulley
PPE longtube headers
Gemini invidia exhaust (maybe losing a little power here exhaust is 2.3in outlet for headers is 2.5)

SoCal07HR

iTrader: (17)

Bump, Waiting for the install and dyno's on an HR.

denchan350gt

iTrader: (4)

Numbers should be good on a HR compared to my DE. Hopefully 512 Z can get them installed today according to his last post.