R32 Gtr Gt2530s Dyno Results Lacking

[berzerkled]

Finally got all my parts in and took the car to the dyno and the results were less than I expected (although, isn't that always the case ). I was under the assumption that the HKS GT2530s would spool much much faster than they did and I was expecting around 450 whp. Let me know what you guys think..

A/F ratios: started off weak but were spot on after moving around the fuel map and we peaked injector duty at only 74%.

Boost: we went up to 1.4 bar to play it safe on the GT2530s, and when it finally got to full boost, it held steady there moving around +/- .2 bar.

Power Mods:

2 x HKS GT2530 Turbos

2 x 300zx MAFs

Ogura Twin Plate Clutch

Greddy Front Mount Intercooler

Sard 722cc Fuel Injectors

Sard 276lph Fuel Pump

NGK Iridium Racing Spark Plugs

Apexi PowerFC Stand Alone Engine Management

Apexi PowerFC Boost Control Kit

Apexi PowerFC Commander

Greddy dual dump pipe /w decat

Apexi exhaust damper control

5Zigen Exhaust

Notes: Dyno sheet is in yankee hp not aussie . It was done on a RWD dyno with AWD fuse pulled, no AWD ones around here. Normal pump fuel was used the whole time.

Not sure why it's showing the image as dead below, but it opens when you click it.

Edited August 13, 2006 by berzerkled

[The Dan]

I know a GTR running N1's / power FC / Injectors / exhaust getting 385rwhp on 1 bar. Something is wrong there mate.

[blk180]

CAMs and what is normal fuel over there. we use 98 or 100 RON over here.

[Driver]

CAMs and what is normal fuel over there. we use 98 or 100 RON over here.

yeah

im getting 405hp with pfc, n1 turbos

[Abo Bob]

Not only is the fuel over there different but it's graded differently too. Can't remember the conversions.

[Beer Baron]

is there a graph with boost pressure against RPM? torque peak at 6500 seems to be like it's very laggy, guessing it doesn't hit full boost until after 5500.

[fat200sx]

they use 91 octane, there premium is around 94. Still far to laggy something must be wrong

[berzerkled]

Thanks for the replys guys..

CAMs and what is normal fuel over there. we use 98 or 100 RON over here.

The 91 I was using is spot on to your 99.

is there a graph with boost pressure against RPM? torque peak at 6500 seems to be like it's very laggy, guessing it doesn't hit full boost until after 5500.

I don't have any sort or graph, but yeah full boost was very very slow. I'm thinking it's one of three things:

1) I have the PowerFC (PFC Boost Control Kit installed) set for 1.4 bar @ only 60% duty, should I bump up the % and lower the boost I'm asking for?

2) The actuators are way off on the turbos for whatever reason and just need to be tightened? I don't know if the gt2530 actuators can even be tightened..

3) Boost leak?

I really have no clue on this one, just throwing some ideas out there.

Thanks again guys.

Edited August 14, 2006 by berzerkled

[Sydneykid]

My first guess would be not enough ignition advance. How much knock are you seeing?

cheers

[berzerkled]

My first guess would be not enough ignition advance. How much knock are you seeing?

cheers

15 was the highest

[Amaru]

they use 91 octane, there premium is around 94. Still far to laggy something must be wrong

Their octane ratiung however is calculated on RON+MON/2, whereas ours is just RON.

American 91 octane is basically equivilant to our 98 octane, and the 94 octane well surpasses out premium fuels.

Edited August 15, 2006 by Amaru

[berzerkled]

Anyways, beyond gas differences. Anyone suggest any ideas as to what the problem could be?

[blk180]

bump some people must have ideas

[berzerkled]

Well something is definatly wrong.. I just did a 13.09 @ 105mph in the quarter mile, with a peak boost of 1.35 bar and everything appeared fine on my Apexi Commander.

So my only 2 thoughts on what could be wrong:

1) The actuators are way off on the turbos for whatever reason and just need to be tightened? I don't know if the gt2530 actuators can even be tightened..

2) Boost leak?

Any ideas?

[rob82]

If you base ignition set right?

Have you checked for blockages ie broken up catalytic converter, rag in the intercooler?

Are the cams in the right spot?

Boost leak?

[Swiper the Fox]

we saw 404awkw (540awhp) on pump gas with a similar set-up and over 450awkw on race fuel...what total timing are you running?? with correct camshaft selection and tuning there is no reason why you shouldn't crack 350awkw (470awhp)

[Busky2k]

AFAIK Mustang Dyno's read pretty damn low?

[Swiper the Fox]

AFAIK Mustang Dyno's read pretty damn low?

The 1/4 mile dyno didn't lie though 13.09 @ 105 MPH

our car was the test car in HPI way back when it was bog stock and i think Ben Ellis managed to reel off back to back 12.9's

[berzerkled]

we saw 404awkw (540awhp) on pump gas with a similar set-up and over 450awkw on race fuel...what total timing are you running?? with correct camshaft selection and tuning there is no reason why you shouldn't crack 350awkw (470awhp)

I'm on stock cams and cam gears. I know that will slow spool but it shouldn't be nearly this bad.

The 1/4 mile dyno didn't lie though 13.09 @ 105 MPH

our car was the test car in HPI way back when it was bog stock and i think Ben Ellis managed to reel off back to back 12.9's

I had another GTR last year and pulled nearly the same time as this one..which has the hks 2530s.. this doesn't add up.

[rb26s13]

i'd say its all in the tune.. or blocked exhaust or something alone those lines