First mod: PPE Headers... +35WHP
 

I've had these headers laying around for quite a while, and finally got a chance to get them installed and on the dyno.

I bought them second hand from another forum member. PPE headers are normally mild steel, but these were special ordered as stainless and ceramic coated. Then I had them wrapped with DEI Titanium wrap.
Pic of the headers after wrapping and before install(linked for hugeness) :yum:

Before and after dyno chart
Before: Stock
After: PPE Headers + UpRev tune
RunFile_005.drf: 86.47 °F 28.68 in-Hg Humidity: 46 % STD: 1.07
RunFile_019.drf: 68.51 °F 29.16 in-Hg Humidity: 30 % STD: 1.03
Final pulls done in 5th gear. These things showed decent gains across the board with peak gain of about 35WHP!!!





The pull in the vid was just in 3rd gear for tuning purposes.

As far as sound, I usually don't care too much about that sort of thing as long as it's not obnoxiously loud. I did notice a bit of rasp on cold starts, but seems to get better as the engine warms up. Standing oustide of the car during a pull, it was not too terribly loud, quieter than I expected actually. Of course I still have stock catback in place.

Before getting it on the dyno I was hoping for +20HP or so, though in the back of my head I thought maybe that was a bit optimistic. Needless to say these headers have far exceeded my expectations. The quality of fabrication and engineering that went into these headers is top notch, and I would recommend them to anyone else looking for the best for their car. Props to PPE for an awesome product. :driving:

35whp.... hmm...... sounds too good to be true...

I agree... ^

Heh, I figured people would be skeptical. I will say one caveat, that the "after" dyno was done in cooler weather which may have affected the results some, though the dyno software should have corrected for that somewhat. Even with that in mind, it's still quite clear gains.

You don't have to believe it though, doesn't affect me the slightest. Either way I'll be having a blast driving my car. :tiphat:

Run numbers tell you all you need to know

How big of a difference in temp?

Don't dynojets read higher anyways...? :confused:

im actualy not surprise with the gain ,
remember the OEM header arent that good with a very bad collector
also remember the OEM cats are very restrictive , people are easily getting 15whp just with test pipe
then next he got an Uprev tune that can maximise his gain by atleast 5-15whp ...


so no im not surprise with that but the dynojet seem to read quite high for a a stock baseline. gaing is gain anyway !

35whp does sound pretty nice, I've been seeing that LTH do make a lot more power. You did get them coated and wrapped so it drops intake temps too, that may be part of the reason for such high gains.

With an exhaust I could believe it more.. however I would imagine most of the gains are getting choked up when entering the CBE

Yes & no, a bit might be, but he also had the car tuned with the headers which will help a bit.
A lot of variables here, his car from factory could be a slug and a tune could opened it a lot and throw in the headers and you see great gains. Honestly, based on seeing a lot of 20+whp from first mods on this forum, I could see this LTH+tune combo netting 30whp since he went from stock.

RunFile_005.drf: 86.47 °F 28.68 in-Hg Humidity: 46 % STD: 1.07 Average Gear Ratio: N/A
RunFile_019.drf: 68.51 °F 29.16 in-Hg Humidity: 30 % STD: 1.03 Average Gear Ratio: N/A
STD corrected

Edited first post to include info.

Also in case anyone thinks the baseline is high as well, I attribute that to my manual tranny which are a bit more efficient than automatic, and non-sport package, which means less rotational mass from wheels/tires/brakes. Oh and I followed the Nissan recommended breakin procedure to a T. :stirthepot:

there is a small advange with those header for the top end , they are step headers not like the FI headers which will give a broader range in power but lower in the top end to compare with the PPE

you definatly see it on his dyno sheet

you should up your rev limiter, I made peak power at 7800rpm with my PPE's, car just keeps pulling with these headers.

As long as you are happy with the results who cares..... I gained 22whp just from exhaust and Test pipes, So I could see adding longtubes with a tune and getting 30+....







DAN