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Roo

By Roo,
in Australian Capital Territory

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Roo Rookie

Roo

Posted
Posted

Hey guys and gals, i've just recently joined the the forums, and I'd like to introduce myself. My name is Roald, but you can all call me Roo.... its easier :)

Now, I don't drive a skyline, but i do have a RB30DET (25/30) in my VL Calais, and I figured this would be a good place to get some good info on the newer nissan tech, as the VL sites i've become accustom to are more 'SOHC oriented'....

I have some Q's regarding my setup etc. but I'll get to them at a later date (studying....)

Looking forward to getting involved,

Regards, Roo ;)

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  • 4 weeks later...
Roo Rookie

Roo

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Ok, so its been a while.... I've been busy finishing my CIT course - flat out!

Here are some pics and info from the prevoius owner. I would have loved to do the conversion myself, but this came along and was far more cost effective :)

Engine

7,000 km's old

3ltr, acid cleaned, crack tested

bored and honed 50 tho to suit oversized pistons,

shot peened rods. New mains, big ends, small ends, balanced etc.

genuine Nissan head gasket

reconditioned RB25DET cylinder head with extra provision for VCT,

ceramic T3 turbo driven only on 6 psi

3inch exhaust with high flow cat

New bosch 910 fuel pump

Custom braided lines for turbo

Nizpro engine bay mounted intercooler

Wiring harness professionally modified to suit vl

Gearbox

R33 turbo 5speed manual box

Pulled down for inspection before fitting

Short shifter

Harness and speedo modified to suit vl

Heavy duty clutch,

shaved flywheel,

Fully balanced and modified drive shaft to suit r33 box

148RWkW and 530Nm on 6 PSI, std. R33 computer :)

Will get more pics up later on some time.

Cheers, Roo

post-43945-1196227870_thumb.jpg

post-43945-1196227880_thumb.jpg

post-43945-1196227887_thumb.jpg

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Roo Rookie

Roo

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148rwkw? :huh:

Are you sure that figure is correct? You should be making a lot more than that...

No offence intended.

None taken :) .The reason for such odd Power vs. Torque figures is due to a rather restrictive intercooler. Between about 2100-3300 rpm I have access to full boost (10p.s.i), but by the time I've reached 4500 rpm its all the way back at 6 p.s.i :) You can see on the dyno sheet where the boost really falls off. Once its gets up on the revs, the cooler simply can't flow enough air.

Correct me if I'm wrong, but I think this setup should really start singing at around 4000/4500 rpm, right where its all over....

I'm condisering sending the cooler to Garrett for a recore (Nizpro tanks are good as far as I know?) and getting the turbo high-flowed/steel wheels. Any other recommendations? Will I need a fuel cut defender (sometimes it surges/cuts under boost at lower revs - i.e. full boost to manifold) or rising-rate reg?

Thanks for any input,

Roo

post-43945-1196474552_thumb.jpg

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Bullet32 Veteran

Bullet32

Posted
Posted (edited)
None taken :P .The reason for such odd Power vs. Torque figures is due to a rather restrictive intercooler. Between about 2100-3300 rpm I have access to full boost (10p.s.i), but by the time I've reached 4500 rpm its all the way back at 6 p.s.i :( You can see on the dyno sheet where the boost really falls off. Once its gets up on the revs, the cooler simply can't flow enough air.

Correct me if I'm wrong, but I think this setup should really start singing at around 4000/4500 rpm, right where its all over....

I'm condisering sending the cooler to Garrett for a recore (Nizpro tanks are good as far as I know?) and getting the turbo high-flowed/steel wheels. Any other recommendations? Will I need a fuel cut defender (sometimes it surges/cuts under boost at lower revs - i.e. full boost to manifold) or rising-rate reg?

Thanks for any input,

Roo

If I may voice my opinion... :)

Well if you want to get the most from your engine set up (RB25 / 30DET) then I would suggest a fairly large low mount turbo such as a Garret GT30 / 82R, dont bother high flowing the one you have.

Im using a GT30 / 71R (slightly smaller than the 82R) and it is good for about 250rwkw, the larger GT30 / 82R will be better for your engine because you have more down low power because of the larger capacity and it will probably spool a larger turbo pretty quick.

If youre going for out right power then you will need a fuel pump - go for a Walbro in tank or Bosch 040. You'll also need to upsize your injectors as the standard ones will max out pretty quick, go for some SARD 550cc brand new squirters, dont bother having the standard ones high flowed.

As for your intercooler, I have been using a Just Jap / Cooling pro 300 x 600 x 76 front mount for a while and Ive never had a problem, I would highly recommend one for the price.

Get in contact with GCG in Sydney for the turbo, Powerflow injection for the pump and injectors and Just Jap for an intercooler.

Im using similar equipment in my RB25DET (550cc injectors, 040 pump, GT30 / 71R and JJR front mount) and my car makes 230rwkw and 550nm at 18psi, very conservative AFR and it has bugger all lag.

:D

post-17958-1196919715_thumb.jpg

Edited by Bullet32
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Roo Rookie

Roo

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Great, thanks for the info :P

For the moment its on hold due to a matter of funds, but I will definitely take your advice into consideration. I have been considering dropping the whole lot into an R32, but again this is more likely to happen later rather than sooner, once I finish my apprenticeship :P

BTW, anyone know what a good R32 rolling shell might be worth, just out of curiosity?

Cheers, Roo

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