25t Lacking Power - 207rwkw.

[tarmac]

HI guys.

Ive recently had my r33 gts25t tuned on the dyno, it made 207rwkw @ 13psi. Setup is a power fc, 300zx afm, 500hp pump, hiflowed steel wheel standard turbo, 3" catback exhaust, fmic.

The gas used was only 95octane, so next time will use 98 (thought it had 98 in it) , and is running 18degrees advanced timing @ 13psi. Torque was something like 1520nm

Im going to take it back for a retune, as im really wanting at least 230rwkw.

Whats my best option of getting this sort of power with my current setup and by not having to change turbos and will upgrading my downpipe make much of a diff.

Thanks

[jenkies]

dump pipe front pipe and cat!!! will improve dramatically! cat backs dont do too much except tiny improvement and noise. thats still an impressive kw improvement... my gtr has similar mods making 200 awkw minus highflowed turbo and a cat back exhaust

good luck

[tridentt150v]

Best option = 98 octane. 1520nM???

[illusiVe]

u mean 520nm?

[The Mafia]

even 520nm sounds high.

Also, I had a 2.5inch dump pipe and that was a massive restriction.

[tarmac]

Ok well ill get onto that asap then..

Not sure what exactly is was, it was 1520 of some sort of measurement.

Will a hiflow turbo do 230rwkw?

[tridentt150v]

Yep

[Adriano]

Exhaust and more boost

[jase-r34]

Isn't torque increased through the gearing in the gearbox/diff?? My bad if I'm wrong

[paulr33]

the torque will be foot pounds or neutons instead of neuton meters

as the others have said

1. check afrs on the tune

2. use 98 ron

3. change the exhaust

4. more boost

5. post your ign and inj maps if you like

[tarmac]

I dont have the actually map on my PC, however know its running 18degrees advance at 13psi. The tuner believed could have gone as high as 21-22 degrees with decent gas.

AFR's at a perfect 12.0 straight through at WOT

I just picked up a cheap crackworthy chinese exhaust dumppipe, hopefully thatll help a tad. - no worries if it cracks, ive got a tig.

[R31Nismoid]

Until you use 98 RON fuel, your tune really counts for nothing mate.

You'll never know whats letting you down if you start off using sub-grade fuel

Put decent fuel in and THEN see what is lacking

[limpus]

Paying for a tune for 95 octane when theres 98 available is a waste of time and money...get some 98 octane in there and retune it...it results are still unsatisfactory then you can look at other issues...

[Granthem]

Isn't torque increased through the gearing in the gearbox/diff?? My bad if I'm wrong

Yeh. I believe the dyno needs to have all the gear and diff ratios of your car to accurately measure torque. Otherwise the figure will not has the actual correct number, however the curve you get is a correct indication still