speedaddic

iTrader: (10)

dyno'd the GS400 again today with the prototype JPI Headers and came up 5 hp short of 400whp @ 395whp. Will post up pics and video of the dyno shortly....

Very impressed with the JPI prototype headers..... All in all not bad for 8psi...


dyno #1




dyno #2

LexFather

Wow, that is pretty awesome!! Get out there and push the car on the dyno next time for the extra power lol

Stage3

iTrader: (3)

Damn... that's one hell of a number!!!!

As to what can get you the other 5 hp... well, short of laughing gas, I really cant' think of much. Maybe some higher octane gas... If coming up with 5 hp was that easy... we'd all be doing it.

Kaiser

iTrader: (1)

Lighter wheels.

LEXUS_KID

iTrader: (4)

JPI Racing

I will get all the details and videos. These headers actually wake this 1uz up.
JPI

GSteg

iTrader: (15)

So what's the final count for hp/tq increase with the headers?

I can't remember the before numbers.

Are you still running on the stock exhaust setup from the cat all the way back to the axle?

speedaddic

iTrader: (10)

running cats and a mode parfume exhaust which is mainly cosmetic I'm thinking....

#'s before were 376whp and 330 tq.... final #'s are 394.something with 337 tq...but we have to compare the dyno sheets for the usable gains in the power band from the headers...not just the peak...doing that now as we type

JPI Racing

Thomas please remember that we are running a Vortech s/c not Rotrex. I haven't actually test the Rotrex s/c but from all the datas that we see it does flow better and cooler than Vortech unit.
JPI

speedaddic

iTrader: (10)

well....can't compare the dyno sheets because the data is different...one is mph and the other is rpm...Jason says he's going to get the full comparison this weekend.

JPI Racing

I'm going back to the dyno place this weeknd to pull out all the datas. Anyone up for a Rotrex s/c kit? I would love to post the dyno sheet and compare the tq numbers with thomas.
JPI

Lexizm

iTrader: (2)

Wish I was in Texas, to help you get those numbers Jason.

bugeyeGS

any pulley upgrades ?that def make a difference in power

JeffTsai

iTrader: (1)

Just wait a month or two for the weather to cool down. Trust me, that's gonna net you a really nice increase in power

chrispy

iTrader: (21)

Slap on a Type R sticker and call it a day. It should add 5-6 whp.