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Moanie

By Moanie,
in New South Wales

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sh@un Grand Master

sh@un

Posted
Posted
Class capacity restrictions is one off the top of my head.

Hmm...I should google that up, i guess.

Did Toyota ever use the 7MGTE or 2JZ in the Japanese touring car championship? or did they need to stick with engines around 2.5L due to turbo equivalency regulations?

wilch Grand Master

wilch

Posted
Posted

I am yet to see anyone who is in the RB30 camp tell me exactly why it's better... As per one of my original posts.

Yet every where I turn there's RB26 information thrown in my face. I know which I would be buying if I needed to (rb26), but that's only because I've spoken to several ppl on sau and several workshops that have nothing to do with sau that all tell me to go RB26 for the same or similar reasons as what R32R had mentioned before.

By posting the information I posted earlier I was no way intending there to be a war between the camps. What I want is information from both sides as to why they're better. That's all.

...oh, I also think this sort of discussion would benefit moonie :(

BU5TER Grand Master

BU5TER

Posted
Posted

once you've had real life experience with both maybe you'll understand

I've had 330rwkw rb25 and 450rwkw rb30 so maybe I know something about it?

I never argue they are better I never argue they are worse but one thing I do know is that I see a lot of parrots posting about the RB30 down falls that just have no idea :(

You say the reasons they are bad is because of what R32R posts but who on here is building Japanese championship touring car or 3rd quickest GTR in the world mmm that would be bo one and as for it being old technology it doesn't seem to hold me back does it? and I very much doubt the hp Mona is aiming for it would hold her back either but then again neither would a RB25

What I'm trying to say is yeah you may be right but in reality at our level of modifications your arguement doesn't matter

wilch Grand Master

wilch

Posted
Posted

Now this will be a bit hard for me as I don't have the "vocab" needed but...

A few things that were brought up at a workshop I go to were

issues with oil and water?? Something about oil in an RB30 naturally wanting to stay up around the head and come down really slowly... etc etc, and this causing issues with reliability for prolonged use on a track (ie, not 400m sprints).

They also mentioned that there is a way to rectify this, BUT for a track car they wouldn't recommend it. One of the mechanics at the place was actually in the process of building up an RB30 w/25 head. He said if all I want to do is do drag racing, then there's no problem, but he wouldn't use it on a hot day around a track.

Is this all utter crap?

(looking to gain knowledge here, not start fights)

wilch Grand Master

wilch

Posted
Posted

hmmm...

it was something about the oil and water lines (??) in the block that lead up to the head.

It's all too confusing. So many ppl saying different things. I should just buy a GTR :

or copy you Bu5ter but with a manual box :O hehe.

white s2, big engine...I already have the big turbo... yeah, why not! :)

DoughBoy Veteran

DoughBoy

Posted
Posted

Yeah but Bu5ter's car hasn't scratched the surface of what it is capable of doing, if you toned it down alot you could still have a 400rwkw motor that peaks at 7,000rpm.

There are a million threads about the oil issues RB's have, I think the unmodified RB30 would be excacerbated by the fact it runs 2 large supplies to the head, the RB26 unmodified has 1 blocked off. But again this is all covered in a alot of threads already on SAU.

A good example of RB25 to 30 is 88sil's car (Mark) - the 20Ghad full boost under 3,000rpm (was it 2,500?) and was all over by 6,500rpm. On an RB25 it's more like full boost at 4k, all over by 7500. Hang on will dig up dyno graphs.

Roy Grand Master

Roy

Posted
Posted
... but one thing I do know is that I see a lot of parrots posting about the RB30 down falls that just have no idea :)

But RB30s dont rev, they have weak blocks and the cranks are weak and they wable and resonate and stuff when you rev them harder then 5,500rpm :):O>_<

A 20B would be such a better option, some nice cams and valvesprings so it can rev and a 20B will leave any RB30 for dead

Swiper the Fox Grand Master

Swiper the Fox

Posted
Posted
But RB30s dont rev, they have weak blocks and the cranks are weak and they wable and resonate and stuff when you rev them harder then 5,500rpm :):O>_<

Yeah....and why you would put a Holden engine in a Skyline is beyond me. :)

Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted
Cubes are for kids who cant play with the other kids on the block...

How about we settle this with a race.

The only gear allowed to be used is 5th gear from a standing still. whoever gets to 100km//h first wins.

GTRgeoff Grand Master

GTRgeoff

Posted
Posted
But RB30s dont rev, they have weak blocks and the cranks are weak and they wable and resonate and stuff when you rev them harder then 5,500rpm :):O>_<

A 20B would be such a better option, some nice cams and valvesprings so it can rev and a 20B will leave any RB30 for dead

And I'll be taking a drive in a 20B Cosmo soon too. Be nice and I'll invite you.

Enough on the 25 vs 26 vs 30 stuff guys. We're here to commiserate the passing of Moanies highly thrashed and trashed donk and support her on her choice of motive excitement.

Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted
And I'll be taking a drive in a 20B Cosmo soon too. Be nice and I'll invite you.

Enough on the 25 vs 26 vs 30 stuff guys. We're here to commiserate the passing of Moanies highly thrashed and trashed donk and support her on her choice of motive excitement.

she will be the fastest chicky on the block. and 20 x faster then roy =)

MR331307 Experienced

MR331307

Posted
Posted (edited)

hello mona

Sorry to hear about you motor.

I got some parts laying around at my shop if you need something. Standard cranks,rods,ETC.

As for the engine, I wouldnt really blame the Tuner.Sounds & looks more to an oil surge which could of been a long thing comming.

As for this rev limit business,I sit on the limiter which is 8200RPM doing my burnouts with the standard motor on 18 psi.As doughboy and buster have seen.I wouldnt blame hitting the rev limiter.

What is you rev limit set on mona and do you have an oil Pressure guage in the car.What oil do you use in your car.

my opinion on the cause is either

-Rod gave up

-Oil surge

For this to be caused by pinging the pistons would of all been rounded on the edges due to detention.

Good luck with your new build.I would stick to the RB25.RB26 if you want to spend the money. I wouldnt recommend going to the RB30 stage till you wanna run in the 9`s.

Edited by MR331307

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