R33 Rb30 Conversion

[r33_racer]

I got a ride in Macgyers(StockyMcStock) car today.....woot for me and him and his twin charged car....it is the shit i tell you. The rain was lame though.

Jealous Cubes???

[Cubes]

I got a ride in Macgyers(StockyMcStock) car today.....woot for me and him and his twin charged car....it is the shit i tell you. The rain was lame though.

Jealous Cubes???

lol....

What did you think of the diff ratio in the VLT paired up with the 3ltr compared to your 4.11's?

Just a tad long or?

[r33_racer]

yeh it did seem to stretch out abit more then the skyline....but the power delivery is like nothing ive felt before......we were like 3rd gear 1500rpm and he goes like half throttle and then bam its like a jet turned on and were doing 80 from about 30km/h....fricken awesome so much more power down low and only from 9psi. Lots of wheelspin, but it was raining this morning so it was hard to get a real appreciation of the power and acceleration. Will definetely hit him up for a ride one day in the dry hehe

Also just a side note the car is the biggest sleeper....looks like your average commo all stockish looking just lowered. The only give away is the fmic and piping. I spose the massive whine from the blower might be a tad suspect...then the screamer well hell once that goes off then you know it aint some stocko commo.

Edited November 4, 2006 by r33_racer

[SLIMVLT]

your lucky it didnt have nice neat holes oiut the side of the block sorry to here lad.

all the ppl saying check your clearences ect if there not rite from the initial build it wouldnt have lasted this long and would have shat along time ago

the oil presure blead that he spoke of would have taken the top layer of bi-metal off and things can only get werse from there in a high power situation.

the poor litle berings would be geting a fair bit of force put on them each power stroke taking more metal off each time.

look on the brite side (if there is 1) you can fix any of the things u have wanted to change.

[platinum]

Pretty basic question -

Are the standard issue rb25 spark plugs suited for the rb30det?

Asked about them at repco, and they want $27ea for platinum "oem" sparkplugs, sounds a bit rich to me (used to paying about that for a set of 6 haha).

[StockyMcStock]

Hey michael, thanks for lettin me have a squiz at the racecar, top piece of work there. MAKE SURE YOU ASK ABOUT THE OPEN-COLLECTOR, SPLIT PULSE HOUSING DILEMMA! i want you to make an informed decision on the thing before putting it on your engine. it's an expensive piece of equipment, that new turbo. see what the experts have to say about it. at the very least, it won't be optimal for gas acceleration and turbulence through the housing. at the worst, it could melt your scroll separator bar and put bits of molten metal through the turbine wheel. just something to think about

definately need to take you for a ride in the dry, you can't really appreciate a twincharge otherwise don't worry it'll be tuned for 300kw soon, that will be more fun i promise. not quite as spastic as your racecar though.....

platinum - standard plugs are fine man. i use and recommend Cheap Shit Plugs®, they are doing fine so far.

edit: because i'm anal, i collected some quotes for ya:

The reason that you don't use a split turbine on an open collector is basic airflow and HP. Because of the design of a manifold, the airflow directed at the plate is never even, even in my manifolds, which are as symetrical as physically possible with the merge collector, with the gas directed at an agle accross the face of the split, the air can't make a decision which side to go up. This is probably a bad example of what I'm trying to at, but basically, the air is turbulent, and in most instances (as in not very well designed manifolding) the air will try and be forced more to one side of the split, effectively halving the cross sectional area the exhaust gas tries to pass through, kinda like putting a tiny rear housing on your turbo.

One of the companies i deal a lot with that has a 8sec turbo hemi, has tested many different turbos and housings over the years, and picked up 72rwhp and 9 MPH just by changing from a 1.32 split rear on his P trim T66 to a .96 single entry on his single entry manifold, as the .96 is smaller in equivelent size, so all of that power was due to better gas flow, it also picked up 900rpm of spool up time. Basically, airflow will never be even in a divided housing, with an open collector.

6BOOST

okay so i can't find any more cause i suck at the internet. just ask around and see what the "experts" say.

Edited November 5, 2006 by StockyMcStock

[r33_racer]

Yeh thanks for that neill...definetely will look into that issue before we get it all going. Dont want to take the risk with the new stuff on the new engine.

[r33_racer]

Well the oil pump was opened up and checked out and its all good and in one piece. So cant blame the N1 pump for this one. Further inspection has revealed the girdle is cracked around no.6 piston.

Well were stripping down another rb30e long block tonight to get it machined asap to put together this new engine. Two weeks to do this. Gonna be hectic

[shanef]

was no.6 piston the one that spun the bearing? is there some way u can crack test the girdle, like u do a crank etc?

[Cubes]

was no.6 piston the one that spun the bearing? is there some way u can crack test the girdle, like u do a crank etc?

When I had the bottom end of mine crack tested the engine builder pointed out a few spots on block, rods, crank and girdle where they tend to crack if they do at all.

I think in r33_racer's experience it was just pure bad luck.

[r33_racer]

no.6 did and 5 with 6 being worst. But it cracked around 6 because as everyone knows 6 always runs the hottest. But weve put it down to a definete oil surge issue that started all this a few races ago. We thought we had gotten away clean but we didnt So dry sump now, so no more oil issues.

Yup bad luck, but thats motor racing for ya

[Cubes]

BIGGER AND BETTER!

[r33_racer]

We can rebuild it. We have the technology. The next rb30 will be better then before. BETTER, STRONGER, FASTER!

[Nate79]

We can rebuild it. We have the technology. The next rb30 will be better then before. BETTER, STRONGER, FASTER!

Good to hear it wasn't the Oil pump, was a little worried. I can assure you I have everything crossed for my passenger ride at QR . Good luck with the rebuild mate. Onward and upwards.

[cordiapower]

Hey everybody,

just got rb25/30 combo dropped in my car, it has been freshly rebuilt with forged WISECO pistons, has heavily ported head and it made 414rwhp at 18psi with ITS 57 turbo which is equivalent to GT30 I think, now it made a lot of power, it uses standard head gasket but did compression test after maybe 1500km and it has compression ratios between 110-115psi, is that too low even for wiseco pistons? I was told it is built for 8:1 compression ratio but this compression results seem low? It has VCT setup as well. Anyone used WISECO pistons on here and what is compression on their engines?

[shanef]

woah man that's bad as! factory compression is 171 with 8.5:1 (RB26)

[Rolls]

Maybe the meter isnt calibrated properly, my ancient redtop rb20det got 110 even on all cylinders and 105 on one and its still making ~140kw with stock everything.

[Cubes]

I think you used the wrong wiseco pistons.

Possibly the pistons they list for the RB30DET that yield a comp ratio that is simply way too low. From memory they achieve a comp ratio of around 7:1.

I used the RB25 wiseco 87mm pistons with a 14cc dome and cometic 0.55" head gasket. With that combo I've got just over 160psi in all 6 when the motor is warm. When cold its just under 160psi. And awesomely.... after 45,000km's all cylinders are the same except for cyl 3 thats a whopping 1psi down, the last comp test it was the same but the motor was tested only when cold.

I'm stoked with how even the comp test came out.

[crack]

I think you used the wrong wiseco pistons.

Possibly the pistons they list for the RB30DET that yield a comp ratio that is simply way too low. From memory they achieve a comp ratio of around 7:1.

I used the RB25 wiseco 87mm pistons with a 14cc dome and cometic 0.55" head gasket. With that combo I've got just over 160psi in all 6 when the motor is warm. When cold its just under 160psi. And awesomely.... after 45,000km's all cylinders are the same except for cyl 3 thats a whopping 1psi down, the last comp test it was the same but the motor was tested only when cold.

I'm stoked with how even the comp test came out.

so the one you used cubes was the one 3rd from the bottom

not the bottom one

here

[Cubes]

Thats right.

I've attached a pic of them. You can see the part number.