R33 Rb30 Conversion

[Cubes]

Here's a pic of the RB30 lower cam belt cover after it has been manipulated.

[Jaws]

Im just gunna fit the grex kit ive got to cover the oil issue

Did you mean the GREX oil pump? http://www.nengun.com/product_info.php?cPa...74e49fa44e1e62b

Or is there a kit for it too?.

I'm assuming this oil pump would need the JUN adaptor.

[Bl4cK32]

Nah, i meant the Grex oil cooler. Ive used the rb20det oil pump, and Joel used an rb25det oil pump he sourced (his rb20det is still going)

Our engine builder said its not a good idea to increase oil pressure, without increasing flow as well...sounds logical to me.

[Cubes]

Increasing oil flow is benificial as more oil = cooler running bearings.

There's no real point spending $$ on an oil pump that is only going to offer a higher pressure to what you already have. The Twin cam RB's have good oil flow from std. pumps.

It also appears to depend on the purpose of the engine, RPM operating range etc.

[Jaws]

Grex oil cooler

What are the dimensions of your one and is it alloy?.

SK in the past has mentioned that the biggest problem with oil is keeping the temperature down.

[Wilso R32]

GTR Ben, out of interest how much has the RB30/26 cost u minus the tubby?

is that a custom manifold?

got loads of question is u got the time as im tryin to source the parts for my conversion, not sure wether to go tt ot T?

wich loom and ecu are u plannin on usin?

[GTR-Ben]

GTR Ben, out of interest how much has the RB30/26 cost u minus the tubby?

is that a custom manifold?

got loads of question is u got the time as im tryin to source the parts for my conversion, not sure wether to go tt ot T?

wich loom and ecu are u plannin on usin?

I have MSN if it makes it easier. [email protected]

Couldn't really say how much it all cost. I basically bought a GTR and took the bits I wanted and made the car stock again.. so didn't buy parts brand new.

That is a custom Subzero Manifold. Actually a Split pulse designed for a T88 etc.. I am just using a small turbo at the moment so have an adaptor.

All depends what you do to the engine. The GTR head has ended up costing me quite a lot more for no real gain. But I wanted the 6 throttles etc. Needed all new valve guides and had to be planed.. as it was not a stock head. (engine place should have told me that first... )

Single Turbo is easier and cheaper if your going larger.. TT would be better for a street car though.

I am using a GTR loom as it is a GTR head. Best to go with the loom to match the Head. I will be running a PowerFC.

I have added trouble with installing all this into a S13.. must be loopy. :headspin:

[Cubes]

In a S13... Power to weight ratio... It will be worth it in the end.

[Bl4cK32]

i think with the rb30det power to weight never comes into it It ALL power

oh yer oil cooler core is roughly 300 x 140 x 50, dunno if its alloy though...feels light enough. I might buy a new core if its not what i need though...

[SmItLeR]

Ben.. just curious (i just addded u to msn btw - so i'll be having a chat to you when i get home )

do you have any pics of the engine in the silvia? or is it yet to enter the engine bay

i'm just curious because my car has just been through rb25det conversion - and i want to see the height of the RB30 in the S13 engine bay

cheers

BRAD

[R32 GTSTT]

Has anyone put a RB30DET in an R32 with the bonnet closing. My Engine has been dropped 25mm and the bonnet still cant close, hits the intercooler pipes which run across the top of the engine. By the way alot of people doing this conversion have been told the block is only 3cm taller, but in fact its 4cm taller.

[Cubes]

My measurements are 40mm also.

So the inlet pipe that hits the bonnet is the one that attaches to the throttle body and crosses over the rocker covers?

Darren, How much was your motor dropped so the bonnet can close?

Only 15-18mm wasn't it?

[R32 GTSTT]

We dropped my engine 25mm, and the sump is touching the swaybar. So i guess 25mm is the lowest you can go. I am going the have to lower the swaybar. I took the intercooler pipe of that crosses over the rocker cover and it just about closes, like properly 2-3mm. Have to check but i think its the top of the plenum where you bleed the air out of the radiator. Ive got a GTR bonnet so i dont know if that is lower the the GTS bonnets

[Sydneykid]

Let's do the numbers;

An RB30 conrod is 152.5 mm long

An RB25/26 conrod is 121.5 mm long

That's 152.5-121.5 = 31.5 mm taller

An RB25 crankshaft has a stroke of 71 mm

An RB30 cranksahfts has a stroke of 85 mm

That's 85 - 71 / 2 = 7 mm taller

An RB25 has a piston deck height 2.7 mm higher than an RB30.

So 31.5 + 7 - 2.7 = 35.8 mm taller

For the guys fitting one to an R32 ( with or without a GTR bonnet) we did that about 4 years ago. I used a Sub Zero style cylindrical plenum on top of the standard lower inlet manifold of the RB25DE top end that we used. Then everything fitted in nicely. Standard engine mounts etc etc.

Hope that helps

[R32 GTSTT]

well i just got a tape measure and measured from the top of the sump to the bottom of the head and it was pretty much exactly 4cm taller

[Bl4cK32]

so your all arguing over 4.2mm?? :bahaha:

Well i think Shaun said he got 12 mm one side and 15 mm on the other side to sit the engine as low as he thought it would be ok. This is with only redrilling the holes in the bracket. I dont know for sure if the bonnet closes, but he didn't say if it did, so id assume it did

The ic pipe where it comes up into the engine bay, back from the inner guard, hit the bonnet at the 90 deg. bend to the right....just before it goes into the stock bov pipe. I have seen the bonnet closed on a r32 with only the mounts being re drilled. Also near the tb if i remember....too many bourbons

Id say you people have to lower the rubber mounts that are in the car (they do go up and down a few mm...but you are arguing over 4.2mm :bahaha:), then redrill the holes on the bracket where it bolts to the engine to get it in the r32. Make sense??

[Clint32]

there will be a problem for people who wont to run the cooler pipes across the front of the cambelt cover, this pipe normally just rubs on the heat shield of the bonnet so up another 20mm will cause a problem im thinking. This will mean the cooler pipes will need to be done in stock location or use a different plenum

[Bl4cK32]

yer, so go the Bathurst design of pipework with the 120 degree bend or use a front facing plenum if you want it to clear all together...not just rub the heat liner

The r32 i saw with thr rb30det had the stock intercooler pipe work route (might have been slightly larger dia. pipes because of a bigger turb) but it still rubs on the liner of the bonnet

[Wilso R32]

I havnt got much experience with the RB30 setup, in fact i have none! but how would you go about achieving 450bhp from an RB30 using a RB26 head with a twin setup? gona be using a set of standard R33 tubbys and upgrade to 2530's in about 6months., and will ne using standard prepped pistons, rods ect.

any suggestions welcome!

[Cubes]

2 x R33 RB25 turbo's should be able to pull at at least 350rwkw.

Thats more or less 470hp at the wheels. Thats around 550hp+ at the flywheel.