Oh, you're saying it's limited for na cars, not limited to only being useful for na cars right now. So if you can tune vvel you could maybe get more power out of a stillen sc kit with headers versus stock cats since stillen was saying that was the reason why their kit makes more power with stock cats.

Sounds good. I was considering EcuTek but for some reason went with UpRev. Still, my tuner actually said EcuTek is more powerful and he does EcuTek, too. Now that I cashed out on the UpRev license already and wanting to go TT this year, I'll wait and see what the TT kit comes with. Since GTM let me down real bad Im considering F.I., but still don't know if their kit is for RHD. Wish I lived in :usa: lol

Btw, after the dyno runs my dash showed a DTC (red lamp for open bonnet) and clearing the DTCs with UpRev didn't help. My his EcuTek cable (which he only got for the GTR as of now) DID clear the DTC :)

I.e, another +1 for EcuTek

That had to be a problem of more flow potential than the blowers could handle.

Too small, bottle neck; too big, everything slows down. Getting it just right is the hard part on designing these sorts of things.

Same goes for the IC piping and core, BTW...

Stillen said it was due to overlap or timing or so ething related to vvel. I don't think the issue is that the blower came move enough air.

For you dynojet people, I'm curious of the wheels and tires.

my first dyno i was running stock gear 3.36 with 20 inch vossen with 245/35/20 hankook
second dyno 4.08 gear 20 inch vossen with 255/35/20 BFG G-Sport pro comp 2

What happened with power? Dynojet compensate or did your number change?

number change with the gears there is no 1:1 or anything close to it with the gear change
my tuner said that the dynojet is simulate driving on the street so its load based.





320whp-268tq 3.36 gears
301whp-249tq 4.08 gears


red was 4.08 4th gear
yellow was 3.36 4th gear
green was 4.08 5th gear

http://i22.photobucket.com/albums/b3...11/image_1.jpg

interesting, so my number might be higher if i were running stock gears

it absolutely would be..as you see I saw a loss of 19whp and TQ with the gear change..
as my tuner said don't get stuck on numbers its just for tuning and such..
I wouldn't switch back to the stock gear for anything I love the 4.08
im going to try and hit the track within the next few months and get some trap times

^ Agreed, I've been told the same thing in regards to my 4.08 FD since 5th gear is now under 1:1. The engine still makes the same power, but it will read lower than it actually is. Makes me want to slap a factory FD in the car just to see what it makes now...I'm making 345whp now on the 4.08's.

Wow those are some great numbers on the 4.08 gears

That doesnt exactly make sense.

The 5th transmission gear is still 1:1, no matter what you do with the final drive.

The reason you lose power with the 4.08 on the dyno is because the final drive ratio is now further away from 1:1 (independent of the transmission). The further you go from 1:1, the greater the losses through the gearing in the final drive itself.

So 5th gear is still 1:1, its just that you have increased losses in the differential.

Also, I believe that the quicker rate of acceleration on the dyno will cause power reading to go down. But that one I am still on the fence about.

I'm not switching back unless I go TT, just good to know since my numbers seemed a bit low for my mods.

My latest retune (after switching from Motordyne M370, Injen CAI to Z1 upper/lower intake manifold and AAM intakes)

Top line is the before, middle is the final product, bottom is the new mods minus the tune.


http://i1091.photobucket.com/albums/...psaoae4zqn.jpg