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Rb28dett Turbo Choice.....

XRATED

By XRATED,
in Engines & Forced Induction

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XRATED Veteran

XRATED

Posted
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Ok chaps, it's like this.....

I have an R32 GTR, I have run 10.6@138mph in full street trim (full exh, street tyres, soundsystem pump fuel etc)... and I wan't to go faster BUT retain the same, if not better response for the street and track. I'm looking for low 10's in full street trim. I don't wan't to sacrifice weight or suspension, or upping the gas..... more power is my only option.

Previous set up: stock rb26 (still quite healthy) 396rwkw, T517Z 10cm's, 260 poncams, PFC, fuel syst, 50hp shot of N2O- at the track only NOT on the dyno, R3C and ppgdogbox, plus all the usual supporting mods... I ran on BFG street drag radials.

I have in stock, Tomei 2.8lt stroker kit, N1 block, ported head, 272 HKS cams etc....

What would YOU use for a turbo kit, maximising response on 98ron fuel, with a total power output around 450-460rwkw... I love my T517Z's but they were running 22psi flat out at 396rwkw.

Cheers

Justin

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R31Nismoid Grand Master

R31Nismoid

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People with 440awkw, stock shift gearboxes etc ... and have have run 10.40 or better, so cut out a few 10ths of a sec due to the dog box, and you *should* be running low 10's already without changing a thing.

So IMO you already have what you need, you just need to drive it to the time the car can run rather than chase power.

You wont get better response by upgrading turbos larger, even if you are going a stroker. Any gain from the kit will be well offset by the turbos.

If anything, just get a T04z, will do over 400rwkw on PULP.

The Dan Grand Master

The Dan

Posted
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If you can't run a 10.1 with a trap speed of 138mph then more power is not going to help you. You need to improve the vehicles dynamics and maybe driving style. The car has got it in it already, you just gotta bring it out.

What was the 60footer time?

rb26s13 Mentor

rb26s13

Posted
Posted
People with 440awkw, stock shift gearboxes etc ... and have have run 10.40 or better, so cut out a few 10ths of a sec due to the dog box, and you *should* be running low 10's already without changing a thing.

So IMO you already have what you need, you just need to drive it to the time the car can run rather than chase power.

You wont get better response by upgrading turbos larger, even if you are going a stroker. Any gain from the kit will be well offset by the turbos.

If anything, just get a T04z, will do over 400rwkw on PULP.

im suprised you didnt point it out.. but twoogle's runs were 10.3 at 134mph with his 2530's and its been 9.7's i believe at 139mph.. so this blokes definately got a low/flat 10 in his car already seeing as he's doin 138mph.. i wonder if he knows about the 140+mph thing with andra which is why paul holds twoogle in third in twoogle across the line for the 139mph

Swiper the Fox Grand Master

Swiper the Fox

Posted
Posted (edited)
im suprised you didnt point it out.. but twoogle's runs were 10.3 at 134mph with his 2530's and its been 9.7's i believe at 139mph.. so this blokes definately got a low/flat 10 in his car already seeing as he's doin 138mph.. i wonder if he knows about the 140+mph thing with andra which is why paul holds twoogle in third in across the line for the 139mph

this man speaks the truth...sort of...lol

correcting a couple of things said in thread...

Ash i assume the 440kw stock shift etc is me...i never raced with 440kw thats just a dyno comp figure (34psi, when racing we only ran 28psi) the car was raced with around 400-410kw.

rb26s13 you are slightly off the mark with the time stated...9.9's @ 139MPH but thanks anyway. Our car was capable of running quicker but couldnt race it to its full potential due to the ANDRA 140 MPH rule.

I think if you go GT-RS's and are willing to rev it (9500rpm) you could run a 9 with that MPH or at least a very low 10. You would have to get the cars weight including driver to around 1475kg to do the 9 though. Although you do have the dogbox so you might get away with being over 1500kg. Our car was almost as responsive as Racepace's 2.9ltr and was all over it in the midrange and ours was only running a STD nissan crank. So RS's are the proven route i think. Our car also easily made 455KW at the wheels at Newcastle Autosalon on 20psi with BP98 and over 500KW at final battle on Sunoco race fuel.

Edited by DiRTgarage
rb26s13 Mentor

rb26s13

Posted
Posted
this man speaks the truth...sort of...lol

correcting a couple of things said in thread...

Ash i assume the 440kw stock shift etc is me...i never raced with 440kw thats just a dyno comp figure (34psi, when racing we only ran 28psi) the car was raced with around 400-410kw.

rb26s13 you are slightly off the mark with the time stated...9.9's @ 139MPH but thanks anyway. Our car was capable of running quicker but couldnt race it to its full potential due to the ANDRA 140 MPH rule.

I think if you go GT-RS's and are willing to rev it (9500rpm) you could run a 9 with that MPH or at least a very low 10. You would have to get the cars weight including driver to around 1475kg to do the 9 though. Although you do have the dogbox so you might get away with being over 1500kg. Our car was almost as responsive as Racepace's 2.9ltr and was all over it in the midrange and ours was only running a STD nissan crank. So RS's are the proven route i think. Our car also easily made 455KW at the wheels at Newcastle Autosalon on 20psi with BP98 and over 500KW at final battle on Sunoco race fuel.

come on.. it had a 7 in it somewhere 9.97 maybe? meh i cbf thinking to hungover i just remember one of your runs was 139mph and was a 9 but had a 7 after the 9. somewhere

Swiper the Fox Grand Master

Swiper the Fox

Posted
Posted (edited)
come on.. it had a 7 in it somewhere 9.97 maybe? meh i cbf thinking to hungover i just remember one of your runs was 139mph and was a 9 but had a 7 after the 9. somewhere

9.97...spot on...PB is 9.95 @ 139.6 MPH....0.4MPH from being logged for no parachute. The day the ignition DVD was filmed (WSID bracket meeting) ran back to back 9.96-9.97 then when they turned up with the camera's and insisted on massive burnouts the times went 10.0's. The last run of the day the ANDRA stewards allowed me to have one pass that they would turn a blind eye to (in regard to MPH) as it was bleeding obvious that i was holding 3rd too long. So with PB's to the 330 and the 660 in both ET and MPH on the run I looked set for a 9.8* at 140+ MPH i went to shift it into 3rd and the bastard would not go in and rolled over the line with my foot on the clutch....it ended up a 10.1 at 129 MPH.

Thats why you can see me rip my gloves off and throw them in the in-car footage on the DVD

Back on topic...a HKS T51R KAI BB has very similar charateristics to twin HKS GT-RS's in regard to airflow, power output and efficiency. On a 2.8ltr that would be my 2nd choice.

Edited by DiRTgarage
Swiper the Fox Grand Master

Swiper the Fox

Posted
Posted (edited)
He wants response!

T04Z. On song by 4000rpm for the win.

we have a to4z on our circiut car...its laggier than the drag car and doesnt make the power, might be ok on a 2.8 ltr though.

Edited by DiRTgarage
XRATED Veteran

XRATED

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Posted
this man speaks the truth...sort of...lol

correcting a couple of things said in thread...

Ash i assume the 440kw stock shift etc is me...i never raced with 440kw thats just a dyno comp figure (34psi, when racing we only ran 28psi) the car was raced with around 400-410kw.

rb26s13 you are slightly off the mark with the time stated...9.9's @ 139MPH but thanks anyway. Our car was capable of running quicker but couldnt race it to its full potential due to the ANDRA 140 MPH rule.

I think if you go GT-RS's and are willing to rev it (9500rpm) you could run a 9 with that MPH or at least a very low 10. You would have to get the cars weight including driver to around 1475kg to do the 9 though. Although you do have the dogbox so you might get away with being over 1500kg. Our car was almost as responsive as Racepace's 2.9ltr and was all over it in the midrange and ours was only running a STD nissan crank. So RS's are the proven route i think. Our car also easily made 455KW at the wheels at Newcastle Autosalon on 20psi with BP98 and over 500KW at final battle on Sunoco race fuel.

Cheers for all the input guys.

I might look into GT-RS's then. I don't really fancy a big top mount. Even though they look sweeeet!

Mr DGarage, I remember reading somwhere that you run "modified" GT-RS's. Was that for response or for more top end??? who did them?

Do you have a dyno sheet posted up anywhere I can have a quiz at?

Cheers

Justin

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