SPOautos

If you ran 17ish psi with ALL the bolt ons and a good street port with upgraded fuel sys you could hit 400 but you wouldnt want to drive all the time with 17psi of boost. It would probably be ok at the track though.

Run 13-14daily and 17 just for a 1/4mile.

You'd probably be ok with a set up like that as long as it was properly tuned. You should also be non seq. The transition would be to hard on the 2nd turbo due to the huge amounts of force being applied to the turbo almost instantly.

Later,
STEPHEN

jimlab

Hey, now...

jr

368 rwhp at 15psi on stock sequential twins - https://www.rx7club.com/forum/showth...light=dyno+psi
He'd be pretty damn close to 400 with 17lbs.

dznutzuk

iTrader: (1)

No they weren't J-spec crap, and yes it's worth it, especially when everyone looks under the hood and see everything like the stock setup, btw non-sequential. Jeff at Pettit knows what Garretts I'm talking about!

Silver93T

I dynoed at 358.7 @ 15psi. This is with a KDR mildly ported motor, SR upgraded sequential twins, intake, full exhaust, intercooler, power fc, 1200cc secondaries, RP main pulley, stock ignition with 9's all round. Tried doing a pull at 16 psi but it was too rich and bogged. By the time Dave took the fuel out it was too late to do another run. I've since added a greddy pulley kit and took out the airpump. I figure I'm probably around 380 rwhp at 16 psi. I also put in the NGK 10.5's last night and it pulls like a **** top end. I'm going in next month for some datalogit tuning and too see what power I can make. I'm not sure how much the SR turbos help. They have slightly bigger compressors and clipped exhaust wheels. The wastegate is also ported. Supposed to be more efficient at higher boost.

ech

Stock 99 spec are not that much different - and they help the low end better than the high end (I have them). I like them alot but they are not a vehicle for big power.

"my friend made 387rwhp on stock twin turbos. He has a ported motor, IC, airbox, dp, cb, ported
motor"

No fair using two motors! :p

1FooknTiteFD

When the guy at XS was tuning my friends car, they said that running 13 psi was ok for street that made about 358rwhp, and 17psi was only good for drag racing 387rwhp and not good for running long track times

artguy

as far as the m2 garret set.....Ill post my dyno sheet soon...I have an appt on the nineteenth as soon as my motor is broken in.

Ill let you all know how the m2 ballbearing twins work out. so far...just early in my pussyfooting around to break in the sucker...Ive noticed that spoolup time is much much quicker. its surprisingly faster actually...

on the other note...no way that running 13-14lbs of boost daily is ok...unless you like replacing turbos every six months....I went thru three sets in two years running 13lbs.

Ill be running fifteen lbs on the m2s...and 18lbs at the track (waiting on IC install for that)

its just a waste of money to push the stock set to 375 plus hp....

good luck

j


ps...to the guy that is running twin garretts..what turbos are they? gt30 ballistics?? gt35s??

thanks

dznutzuk

iTrader: (1)

Sorry I can't-won't tell anybody, they are my own design and I'm very secretive, When I get back to Greece I'll post up some dyno sheets for all you non-believers!

95R2-89TII Ground Zero

He ported his motor twice....LOL Anyway, I would think that you could get at least 350rwh from the stock turbos.

kwikrx7

probably only a handful of peple have every gotten 400 rwhp out of their stock twins. I'm sure you'd have to be very aggressive with tuning and run atleast 18-19 lbs through them to eclipse the 400 barrier. Atleast with upgrades running parallel you can get 400 rwhp at 15-17 psi and be much safer than running incredibly high boost through a sequential setup.

SPOautos

I'd say when xs used the term "long track times" they are probably refering to road racing. I'm refering to drag racing when your only going to be runing full boost for 1/4. You certainly could NOT run 17psi on a road coarse for any length of time with the stock twins.

There is a guy here on the forum that dynoed 400 RWHP and ran a 11.1 with the twins in non seq form. I think his name is AnthonyNYC but cant remember if its him for sure or not.

There are other things to consider on the dyno like intake temps that will be lower on the street.....especially during the cooler months.

Later,
STEPHEN