R33 Rb30 Conversion

[r33_racer]

was a .82 rear.

[Craved]

was a .82 rear.

sweet, been trying to guage the response from my HKS version 3040 with the 0.86 rear once the motor is built (prob another year at this rate) same cams etc

[psi]

yea.. thats the go.

I had a good look at the tomei cams. You just convinced me!

I have the 0.86 turbine..

i will be fitting the greddy type plenum with the Q45 Throttle and AFM.

My fuel system is almost finished, so then I'll start on a rebuild I guess!

How much power did you make with that set up @21psi?

Cheers

[r33_racer]

with water/meth made 370rwkws.

[psi]

Thats perrrrrrfect!

That will pull like a freight train and be so easy to drive!

I was looking to get it to build boost earlier and be very flexable.

Its not too bad now, but the bigger cubes will be welcomed!

add the effect of the cams, and other breathing stuff.. it will be quite a strong set up.

My wife gives it a squirt now and then, so I can't make it toooo unfreindly.

Besides which, it will be so much MORE fun at my skid pan days.. Useless, but fun!

I hope to put it down the strip a few times after that.

Thanks a heap for you input!

Aaron

Edited April 13, 2007 by psi

[Cubes]

psi,

I went with the slightly smaller GT3076r .82 but in IW.

Will be interesting to see the spool comparison.

[Al]

psi,

I went with the slightly smaller GT3076r .82 but in IW.

Will be interesting to see the spool comparison.

Same here

[psi]

I went for the 3040 for the reason that I am never happy with the horse power...

The slightly larger turbo will give me a little bit of spare flow should that be the case again!

and I'm sure it will be!

It will take me awhile to do what I want to do, about a year I guess. But that is where I'm heading,

I have bought my list of parts with a 420~460 rear hp figure in mind.

the 3040 will be up to the tast without too much lag.

I read on a Donaldson truck mufflers site yesterday about exhaust flow,

I chrunched some numbers and damn near died! I am now upgrading the

exhaust to a full 4inch. At the moment it is 4" off the turbo and the

WG joins just before the cat. 3" cat back..

I've read alot of your posts 'Cubes' and it will be very interesting to compare the engines!

Cheers.

[Cubes]

Definitely run some decent 100ron fuel + water/meth injection and you'll see the figures your chasing.

[StockyMcStock]

for 450rwhp and good response, i'd definately go the 35/40 with .86 rear. the 3040 will probably *just* do it, but it will take a lot of boost, and that's not as safe as the slightly larger turbo with less back pressure.

[Cubes]

for 450rwhp and good response, i'd definately go the 35/40 with .86 rear. the 3040 will probably *just* do it, but it will take a lot of boost, and that's not as safe as the slightly larger turbo with less back pressure.

The difference is the gt3540 will do 450rwhp on pump fuel.

The GT3040 won't, I feel ~400-410rwhp is max on pump with the gt3040 but every dyno and individual setup is different.

[Scooby]

Hi Cubes;

you might wish to make an addition to the Guide that indicates when fitting an RB30 to an R32 GTR, the twin turbo pipe and the bonnet reinforcing does not allow the bonnet to close. I think there is an expectation out there that there is no problem.

I'm looking into fixes such as cutting away the reinforcing.

Also on the guide, it suggests a cam belt tension of 20kg as in the manual, but 20kg measured against what? in the absence of a deflection measurement f some kind i'm not sure how the 20kg is applied?

Cheers

[Cubes]

Hey Scooby,

Cheers.. I haven't had many/any report back on the issues of the rb30dett in a gtr so appart from the small issues mentioned by Antony and Sky30 I am none the wiser. Both Antony and Sky30 have gone with a single turbo setup, the only issue they have came across is the cam belt cover fouling the bonnet which requires slight trimming of the bonnet support.

The 20kg's its been some time but I remember it was the deflection on the belt, not 100% sure I would have to check the engine manual again.

Any pics of a GTR/GTS4 setup would be nice.

[psi]

i know an SR20 with the 3040 and has 400+rwhp and is still going strong on Pump fuel!

The overall HP is not so critical. But throttle responce is. If I only get to 405, that will do me.

3L, cams and 3040. it will be very strong lower in the rev range.. That is exactly what I want.

Thanks for your help..

Cheers.

Aaron

[Cubes]

i know an SR20 with the 3040 and has 400+rwhp and is still going strong on Pump fuel!

You'll find it won't have much more in it on 98ron pump fuel, 100ron pump fuel (not available here in SA) you can squeeze a little more.

I believe r33_racer managed around 320rwkwish on the gt3040 on the 100ron pump fuel + nice plenum + nice exh. manifold before going watermeth and pushing 370rwkwish.

[Sydneykid]

Hi Cubes;

you might wish to make an addition to the Guide that indicates when fitting an RB30 to an R32 GTR, the twin turbo pipe and the bonnet reinforcing does not allow the bonnet to close. I think there is an expectation out there that there is no problem.

I'm looking into fixes such as cutting away the reinforcing.

Also on the guide, it suggests a cam belt tension of 20kg as in the manual, but 20kg measured against what? in the absence of a deflection measurement f some kind i'm not sure how the 20kg is applied?

Cheers

I had never had any fouling problems.

What engine mount holes did you use on the block?

Did you use the RB26 alloy mounts or the RB30 streel mounts?

Have you redrilled the lower engine to subframe mount?

Have you spaced the subframe down from the rails?

cheers

[Cubes]

I had never had any fouling problems.

What engine mount holes did you use on the block?

Did you use the RB26 alloy mounts or the RB30 streel mounts?

Have you redrilled the lower engine to subframe mount?

Have you spaced the subframe down from the rails?

cheers

Garymeister,

So you do redrill the lower engine to subframe mount and also space the subframe down?

If you simply bolt the sump adaptor on and then bolt it all in using the std untouched engine mounts the cam belt cover always fouls. 2 in SA that I know of have had the same issue and a few others through PM's in their GTR's.

Never actually heard of (through PM's and the like) the twinturbo pipe fouling apart from scooby's.

Sky30 had the same bonnet fouling issues. I believe he origionally looked at lowering the engine/subframe but decided against for what ever reasons.

[shanef]

my concerns with lowering the subframe would be how much of an angle will the axles/susp components change? how much more strain would this change in angle put on the susp. components and would it magnify with decent hp, 700+?

[Sydneykid]

Garymeister,

So you do redrill the lower engine to subframe mount and also space the subframe down?

If you simply bolt the sump adaptor on and then bolt it all in using the std untouched engine mounts the cam belt cover always fouls. 2 in SA that I know of have had the same issue and a few others through PM's in their GTR's.

Never actually heard of (through PM's and the like) the twinturbo pipe fouling apart from scooby's.

Sky30 had the same bonnet fouling issues. I believe he origionally looked at lowering the engine/subframe but decided against for what ever reasons.

All of my questions are related, use the wrong engine mount holes on the RB30 block and you get fouling problems

Try and fix it with drilling the engine mounts and you get fouling problems

Use the wrong engine mounts and you get fouling problems

Keep in mind that the sump adaptor lowers the front dif (and drive shafts) 6 mm anyway.

Think about it, an RB20DET with cross over pipe (75 mm in diameter) fits under the same bonnet height as an RB26. The RB20 block and head are the same height as the RB26 block and head. The RB30 block is only 38 mm taller than the RB20/26 block, so you should have 37 mm free space.

My guess, some people use the wrong combination of bolt holes and engine mounts. Hence the questions.

cheers

[Sydneykid]

my concerns with lowering the subframe would be how much of an angle will the axles/susp components change? how much more strain would this change in angle put on the susp. components and would it magnify with decent hp, 700+?

You are concerned with drive shaft angles from lowering the sump a few mm, but I bet you lowered your car 40 mm and didn't even think about it.

cheers