R33 Rb30 Conversion

[proengines]

how is it only 1 in 10 are suitable? arent the blocks all made the same? or individually cast.....lol but seriously hows that possible?

<{POST_SNAPBACK}>

The RB30 block doesn't have the boss cast into it to take the squirter or the locating lug. It's a lot thinner through to the oil gallery also, with core shift in the castings it can end up too thin to tap a decent thread into by the time you have machined a flat for the squirter to sit against. It needs to be a very accurate job to locate the squirter in the correct position. I did a 3S toyota not long ago to take 3SGTE squirters and it was a 3 hour job by the time it was finished. I'd say around 4 hours on a RB30, thats $400, it makes coatings pretty well priced.

[StockyMcStock]

hi guys - haven't checked in on this thread for a while now but good to see some progress from the new 30DET guys.

my engine is physically in now, i have fabricated the dump pipe and am in the process of making up the cooler piping now. i'll take some photos of the state it's currently in for future reference. as cubes mentioned i'm twincharging this engine, however i will be running it in with the turbo only until i get the blower mounted and driven - which is surprisingly difficult i assure you.

Parts list:

3ltr block

ACL casties, standard bore size, ACL race series rings.

rods - standard. Crack tested, cryo treated, beam polished then shot peened.

bearings: Nissan mains, clevite 77 rods.

R32 GTR oil pump.

(EDIT: for the love of god, don't start this conversion with a series 1 block!)

R33 RB25DE head

lightly ported exhaust side

fully rebuilt, new valve guides, reseated valves etc

stock cams

stock cam springs <--- probably not for long, we'll see.....

RB25DET 380cc injectors for now.

Custom JD plenum

XF throttle body (3 inch)

Hot side:

Stocky Racing Industries tubular, split pulse exhaust manifold

50mm HKS racegate off turbine housing.

Full house GT40 turbo. 1.34 exhaust A/R, split pulse. 0.72 A/R compressor. 4 inch inlet.

Stocky Racing Industries 3.5 inch dump pipe.

Stocky Racing Industries 3 inch cat-back mandrel bent exhaust.

Stocky Racing Industries 3 inch stainless cooler piping.

Eaton M90 supercharger, custom shortened drive snout for clearance. 1.8x crank speed drive.

Garrett 32mm wastegate setup as a bypass valve for the blower.

Hybrid front mount.

PowerFC.

Q45 AFM in the piping.

As you can guess i've done 90% of the work on this engine myself, to the point of building the bottom end and making my own exhaust manifold. overall, a great learning experience i must say!

I have oil pressure, spark and fuel now so my wiring job has worked, just waiting on my mate's TIG to finish the piping and a few little things, then she'll be ready to go. will update with pics soon.

Edited February 17, 2006 by StockyMcStock

[lukits01]

wow, impressive list. Just a minor question, what do people do with throttle cables when they change to front facing plenum? does the standard one just fit? I'll be using sub zero plenum with XF throttle body.

[DORIFUTO_The Future]

When i read stocks list and saw the turbo and supercharger there i had a funny feeling in my pants. With that said isnt tunning a supercharged and turbo'd engine supposed to be a right prick? Would love to see some photos of the engine and supercharger install.

Edited February 18, 2006 by DORIFUTO_The Future

[danielson]

When i read stocks list and saw the turbo and supercharger there i had a funny feeling in my pants. With that said isnt tunning a supercharged and turbo'd engine supposed to be a right prick? Would love to see some photos of the engine and supercharger install.

<{POST_SNAPBACK}>

shouldnt be any different to tune, its just like having an automatic dual stage boost controller, such as the factory rb25det job... runs a cirtain boost level to a specd rev, then turbo boost kicks in to cover the rest of the range... unless you are using a afm, then its slightly different... i think

[StockyMcStock]

it's not really any different to tune, just pull some timing out below 3000rpm, add more fuel everywhere and away you go. being able to run a giant exhaust housing is a nice positive to this setup.

as a reference, the exhaust housing i have is recommended for a 13B rotary drag engine producing 700-800hp at the wheels. i've never seen one this big on an RB30. it was very very very carefully selected after much debate and turbine flow chart analysis. i hope that it is small enough, the next step up was a GT42 but the smallest compressor i could get on that would be surging due to only having to supply 7psi pressure @ 500hp worth of flow. as it is, my compressor stage will be skating on thin ice to do this.

i haven't mounted or driven the blower yet, it is still in the machine shop getting modified. i'll take some photos next weekend if i can, with just the turbo in there.

as you can guess, packaging is a big issue.....

[BOVed]

What kind of exhaust system would you use on an RB30/RB25det hybrid?

[Cubes]

One to suit your power level.

[paulr33]

touche

[Cubes]

lol

[paulr33]

[Drift Freak]

Hi Guys,

I've got a mate who had an RB30DET in his VL Calais using an RB25DET head (Stock), he told me he used a stock crank(balanced and blueprinted), stock RB30 rods(shotpeened), forged JP pistons with BMW gudgeon pins, an extra cam chain tensioner for the timing chain, a Wolf 3d computer and T04e turbo.Which was good for 300+ conservative horsepower at the wheels. When I asked him about oil pressure and reliability he told me he used a stock RB30 oil pump with reliable oil pressure the whole time he owned it (3 yrs). To back that up he used a Twin plate clutch and VL Turbo greabox (not sure if the box would fit in a skyline though).

[[200]]

GTR with twin GT3037's

Interesting??

[conan7772]

Anyone ever seen or know of a successful low mount of a GT30/40 or GT35/40 in an R33 ?

These two turbos apparently use the same size housings.

I'm trying to avoid changing my plenum and all my piping.

The stock turbo is already quite close to the strut tower.

I've seen various low mount manifolds available which appear to push the turbo further down, but might only suit R32 & R34.

Can anyone confirm...

[2BNVS]

i had a td07s low mounted on a trust manifold, could only fit it withthe rb30 bottom end that worked well, i just changed for a hi mount and front facing plenum

ben...

[R31 POWER]

Mmmm im leaning towards the dark side eg 30det

I can get a R32 25de head and rb30e block quite easy and then use my pfc,gtr injectors,nismo fpr,z32 afm? or will it max out,25det gb.Then parts i would get is bigger turbo,stronger valve springs and thats it? how does that sound.

Would be interesting to see how the hks gt2535 goes on it thou

[Bl4cK32]

im usinga 25det gb with bearing noise and its held up for roughly 15,000 kms no probs.

The 2535 on it would suck balls, like mine. Full boost @ 1500rpm makes 218rwrkw on last tune, but should go higher.

the rest of the parts is ok.

if i did it over, id go 26det head.

[R31 POWER]

Ok cool.The thing is i have the money to spend on it but would rather not lol,house is more important! So thats why id like to use the r32 de head so i can use all most my parts bar some,eg turbo.

I'm still thinking what i should do atm.

[lukits01]

The 2535 on it would suck balls, like mine. Full boost @ 1500rpm makes 218rwrkw on last tune, but should go higher.

Shouldn't the 2535 be performing better than that on a RB30? I mean it makes 250rwKw on a RB25. What RPM does the power peak at?

[Bl4cK32]

Im only going by an old dyno sheet, so from memory my rb20 is a highflow, sort of like a t3/t4 hybrid thing. Similar, maybe a little smaller than the 2535 in sizing. The cc's move the power band of mine back to 1500 rpm, and still pulls past 6k. If it had cams/manifold, it would make more and rev a bit better, but the turbos too damn small. Minimal for the motor id say is a GT30 or similar.

That, or drop your diff ratio as 1st gear is useless