Definitive Guide To Building 300-330awkw Gt-r

[zebra]

Factory Maf-less ECUs FTW

Ps Steve-o...measure radiator kthx!

[SiR_RB]

Yeh my afms were tuned around too, but running nismo/z32 afms just gives you an extra level of security

[Count Grantleyish]

Currently running -9s with 335kw, nismo 600cc injectors and fuel pump, with a max injector duty cycle of 86%

Just for reference

Dyno graph please!

[levinboy]

What air flow meters are using to get up to that figure? Are the standard still coping or have they been changed to Nismo or Z32?

My car is getting tuned in just under two weeks with -9s and 720cc injectors so i'm thinking the AFM's are going to be the next limiting factor.

I'm using Z32s works well recommend upgrading or like stated earlier mafless ECU

[levinboy]

Dyno graph please!

Graph is near the bottom of page 16 of rb26 dyno thread, will post up when I get home, on phone at work

[Count Grantleyish]

Will look into that.

[joeyta22]

Just last weekend i make 311kw on my 32gtr. -7 turbos, tomei cams, supposed head porting, turbo back exhaust, 750cc injectors, fuel pump, pfc. I bought brand new z32 afm's, messed around getting them all fitted up nicely; when it came to getting tuned the tuner basically said we were reaching only maybe 20% of the z32's efficiency and had bigger jumps in voltage vs trim than the original so much harder to get a steady afr. Ended up swapping back to the original afm's and instantly became better to tune (smaller voltage steps meant more refinablilty) and still have 0.5v to spare. Spools up quickly and pulls harder that a professional thaiwanese girl

Edited October 7, 2011 by joeyta22

[levinboy]

Dyno graph please!

as requested

[Count Grantleyish]

Thanks.

[smithy85]

For everyones information, I have compiled this spreadsheet of all the results from the RB26 dyno thread here:

SAU_dyno_comparisons.xls

This only includes results that aren't from standard turbos, but heaps of results from -7's/N1's, -9's/GT-SS, and -5's/2530.

I have also added this to the dyno thread.

And yes I did get really bored to find the time to come up with this one lol.

[siba33]

Just last weekend i make 311kw on my 32gtr. -7 turbos, tomei cams, supposed head porting, turbo back exhaust, 750cc injectors, fuel pump, pfc. I bought brand new z32 afm's, messed around getting them all fitted up nicely; when it came to getting tuned the tuner basically said we were reaching only maybe 20% of the z32's efficiency and had bigger jumps in voltage vs trim than the original so much harder to get a steady afr. Ended up swapping back to the original afm's and instantly became better to tune (smaller voltage steps meant more refinablilty) and still have 0.5v to spare. Spools up quickly and pulls harder that a professional thaiwanese girl

Hey mare do you have dyno graphs with rpm etc? If not when do you hit full boost and what boost are you running? Cheers

[vspecIInur]

Just got my dyno result back from racepace. Got 316kw running 17-18psi with n1's, fuel pump, ID 1000c injectors (53% duty), nismo afm's, pfc, racepace 3.5" full custom exhaust and cam gears. This is a really safe tune. Can post up dyno sheet if you want.

Car is mega responsive and still kicks out with 285's all around 1st and 2nd gear.

[joeyta22]

Hey mare do you have dyno graphs with rpm etc? If not when do you hit full boost and what boost are you running? Cheers

Is running at 17psi max and hits that at 4500rpm, could be much better but the actuators are piss weak (only about 8psi) which is why the power becomes a little wavey around the top of the graph aswell. Overall im stoked with it tho, 200kw at 4000rpm is a great result in my eyes.

[Hadouken]

@VspecIInur - what n1's are you running?

[R31Nismoid]

It'll be R34 N1s

[vspecIInur]

^This

[dori34]

joeyta22, nice results mate. im still deciding whether to go -7s or -9s as an upgrade.

how much better are the -9s in terms of response compared to -7s?

is there any -9s dyno sheet with RPM instead of speed.

is there anyone in sydney with -7s or -9s on an unstroked motor who are willing to take me for a test drive? worth a shot asking anyway lol

[SimonR32]

Just to throw a spanner in the works for low mounts, here is a direct comparison between a -7 set up and a GT3582R on 6boost manifold

I dislike 35R's because they are so lazy but even a lazy single appears to kill the low mounts everywhere

haha i got the exact same setup tuned on my car 2 days before you posted this..

Unopened rb26dett (115,000km)

tomei 260 9.15mm poncams type b

gt35 0.82 rear

6boost mani

tial 44mm w/g

700cc sards

stock rail

044 intake

tuned on BP98

485hp @ 20psi on a safe tune (at hubs)

full boost at 4300rpm, love it! shits all over my old twin setup in every way

thick line is gt35 + poncam tune, thin line is -7 tune

Apologies for the poor phone pic of my dyno graph!

[R31Nismoid]

Not really a spanner. It's already been established, the -7 setup was 100rwkw down @ 4500rpm compared to every other -7 set-up. That ain't no dyno variance

http://www.skylinesaustralia.com/forums/topic/379561-gtr-r33-v-spec-build/

So whilst a direct 'comparison', it's totally wrong to compare a working set-up with one that has major issues.

Very misleading info, although it wasn't intended that way of course.

[SimonR32]

Not really a spanner. It's already been established, the -7 setup was 100rwkw down @ 4500rpm compared to every other -7 set-up. That ain't no dyno variance

http://www.skylinesaustralia.com/forums/topic/379561-gtr-r33-v-spec-build/

So whilst a direct 'comparison', it's totally wrong to compare a working set-up with one that has major issues.

Very misleading info, although it wasn't intended that way of course.

It's not misleading at all, if you look at ANY result on the ALLSTAR dyno they are always down on midrange compared to most other dynos...

For instance my car only makes 127rwkw at 4000rpm on the Allstar dyno but 196rwkw at the same rpm on a Dyno Dynamics dyno. That was on the same tank of fuel with about 50km driving between the 2 dynos!

Another RB25 neo makes 135rwkw at 4000rpm on the Allstar dyno but 220rwkw at the same rpm on a Dyno Dynamics dyno...

Then we could compare my set up to batterys, both same motor, same fuel, same turbo, same manifold, same gate... Same top end power on the same boost on the same type on dyno. Plus same boost response and build up on the road. His makes 200rwkw at 4000rpm (funnily enough almost exactly the same as mine on a dyno dynamics) and mine makes 127rwkw...

Take from it what you will, I have no idea why it is like that but every single result I see off the Allstar dyno appears to have shit mid range compared with other dynos which explains most of the "100rwkw down @ 4500rpm"

Edited October 11, 2011 by SimonR32