R33 Dyno Results - POWER DIPS!

[damono]

yeh ive kinda convinced myself i have to go for the PFC now, just gotta find the $$

[leech_]

Finally got the dyno graph up the following is how it appears

Blue 4th Gear - Bone stock nothing done no AFR was done on this day 141ish. done 7 months ago - note the dual stage kicking in.

Red - 4th Gear - 3" dump pipe, high flow cat, hks super dragger exhaust, K+N Panel filter, Turbosmart bleed valve set to 9psi

Green - 3rd Gear - 3" dump pipe, high flow cat, hks super dragger exhaust, K+N Panel filter, Turbosmart bleed valve set to 9psi

Conclusion: In stock form looks pretty clean. add a bit more boost and a few other things the ECU decides to go into over protective mother mode and pump way to much fuel in by the end of the run it looks like it was running at about 10.5 which is wayyyyyyyyyy to rich but still making ok power though you cna also see it starts getting a bit wavey up top.

Putting the FMIC on soon will probably just make it worse too so yea i will be looking at least an SAFC if not something else. Does anyone have any feedback on a tuned r32 ecu as the 33's cant be tuned from what i have been told. i think one of the guys toshi posted up in the for sale area that he can re-program them for a couple of hundred dollars which would be alot better than a SAFC providing its tuned right wouldnt it ???

[Sydneykid]

Finally got the dyno graph up the following is how it appears

Blue 4th Gear - Bone stock nothing done no AFR was done on this day 141ish. done 7 months ago - note the dual stage kicking in.

Red - 4th Gear - 3" dump pipe, high flow cat, hks super dragger exhaust, K+N Panel filter, Turbosmart bleed valve set to 9psi

Green - 3rd Gear - 3" dump pipe, high flow cat, hks super dragger exhaust, K+N Panel filter, Turbosmart bleed valve set to 9psi

Conclusion: In stock form looks pretty clean. add a bit more boost and a few other things the ECU decides to go into over protective mother mode and pump way to much fuel in by the end of the run it looks like it was running at about 10.5 which is wayyyyyyyyyy to rich but still making ok power though you cna also see it starts getting a bit wavey up top.  

Putting the FMIC on soon will probably just make it worse too so yea i will be looking at least an SAFC if not something else. Does anyone have any feedback on a tuned r32 ecu as the 33's cant be tuned from what i have been told. i think one of the guys toshi posted up in the for sale area that he can re-program them for a couple of hundred dollars which would be alot better than a SAFC providing its tuned right wouldnt it ???

You can't use an R32GTST ECU in an R33GTST, no VVT for a start, plus the pin outs are totally different. I should point out that in my opinion any ECU tuning not done on line (ie; off the shelf chip) is a GUESS, and every engine is different.

I can't see how an FMIC will make it worse. If it lowers the inlet air temps, you may be able to run lower boost (decrease the airflow) and make the same (or maybe even more) power. Less airflow would mean the standard ECU would resort to a lower (or non existant) R&R strategy.

The only time an FMIC would make it worse is if you choose to allow the lower resistance to increase the boost. But that is your choice, not the FMIC's.

[leech_]

cheers sk as usual appreciate the advise yea will be trying a few different combos on the dyno next time just to see if i can run a lower boost thus maintaining better afr's

[D1B|itz]

Hey guys, i know this might sound side tracking abit...but im just curious, does it mean that running anything more than stock boost on standard ecu, will cause the car not to perform as well?

Assuming that the ecr33 has been modified with stock internals?

[leech_]

Hey guys, i know this might sound side tracking abit...but im just curious, does it mean that running anything more than stock boost on standard ecu, will cause the car not to perform as well?

Assuming that the ecr33 has been modified with stock internals?

how do you mean it wont perform as well naturally it is performing better as you are making more power however you are probably not doing it the safest/best way if you are not using some sort of fuel/engine management

[benl1981]

I was wondering would these power dips show up under WOT in 2nd gear aswell you think?

Also - I am thinking about getting a powerfc...

but I saw on the UAS website there is a graph for a car with more mods than mine and it is going well on stock ecu!!

208RWKW with good power curve!! What's wrong with mine and everyone elses??

FROM UAS site:

SKYLINE R33 GTS-T

* UAS RB25 Plenum & Intercooler

* 12 Psi

* Standard ECU

* Standard Turbocharger

* Cat Back Exhaust

* Pod Filter

208.4 KW AT THE REAR WHEELS

[paulr33]

its in shootout mode with an intake temp of 34 degree's so its rounded to compare what power it would make at 25deg inlet temp, so its probably reading higher than it normally would. the plenum wouldnt make an ounce of difference and the stock dump would be a nice big restriction. heck my stock dump is holding me back at 170rwkw with powerfc

[courier33]

Brought my Skyline 4 weeks ago. Was stock standard but now has:

K&N Pod filter

Jasma cat back exhaust

Split dump and front pipe

Ball type boost control valve

Had its first dyno run this morning in 14 degree weather and made 178 rwkw.

Boost was set to 12 psi and my dyno chart doesnt show any of these dips in the power. The torque is also quite flat.

The mixture was VERY rich though, and the tuner said there was another 20kw to be found by leaning it out in the upper RPM.

Looking at upgrading to a front mount intercooler next but still trying to find an aftermarket one that has the GTR style end tanks, not the ones that look like only the bottom 3 rows are being used.

[damono]

dunno about the accuracy (difference between figures) tho because its not a 'dyno dynamics' dyno

[leech_]

benl1981 that afr looks ok till the end then it richens right up again thats again what i think most people are pointing out wind to much boost in and a few bolt ons and no form of programable ecu and your afrs are going to be to rich

[benl1981]

It just seems like that is a lot better than the curve most people are getting. I think I am getting rich and retard at around the 10psi mark with only a R34 intercooler. If you compare the UAS graph to others it seems that it is a very good stock ecu. I'm not talking about power. I'm more looking at the shape of the curve..