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Oil Control In Rb's For Circuit Drag Or Drift

Sydneykid

By Sydneykid,
in Engines & Forced Induction

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carl h Proficient

carl h

Posted
Posted

did you fit a crank collar to your rb30 bottom end, iirc the rb30 has the same short snout issues with the oil pump drive as the early rb26...

might have caused pump failure.

I am pretty sure my oil pump has been screwed for the last 6 months causing me these issues. Getting a GTR pump and hopefully installing it this weekend.
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iruvyouskyrine
iruvyouskyrine

Whoops, yes i did mean catch can, corrected it now. Yes i understand that now. The two goals are to reduce the amount of oil entering the head, and equalize crankcase pressure. The oiling issue is s

fatz
fatz

less thinking more doing shit that works in the getto Dash ten on pasengers side Two dash 12 on the drivers side, angles and spaced so as not to hit shit and be able to tighten the f**ker up note

SimonR32
SimonR32

I ran my set up right up to 8800rpm at 2 bar (740rwhp) around the track with sticky R-comps the other night and not a drop out of the catch can. This is with no oil restrictors to the head and a stoc

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r33_racer Grand Master

r33_racer

Posted
Posted (edited)

we get the same lifter noise occassionally when the revs drop right down to a crazy low rpm, like 600 or less. But it clears when oil pressure returns to normal. So a lack of pressure will cause the lifters to tick abit. There might have been no problem with them originally, as in not bad enough to replace but its infact your oil pump that needs seeing to.

Yes i think its pretty much a deadset certainty that you need the collar to avoid the oil pump cracking issue.

Edited by r33_racer
Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted

pulled down the engine and found that every piston had all the rings broken and in pieces except for one piston. Most of the bearings were scored and number 6 had spun and welded itself to the rod.

So its rebuild time. not going to bother with stock bottom ends anymore. waste of time

Cubes Grand Master

Cubes

Posted
Posted

Guilt Toy..

Any idea why the bottom end had such a catastrophic failure?

There must be a reason, not just because it was a stock bottom end.

If number 6 had spun... Usually that's a sign of rod bolt stretch from my understanding?

What rings are you going to look at this time around? King have a good rep with the rb30's. However its a must they run the HP bimetal bearings as trimetals are crap in a performance application.

Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted (edited)

Apparently my style of driving is enough to kill any engine. I like to hit the rev limiter and i like to hit it hard. I like to boost the engine hard on weekends.

Its got 350rwhp... so the stock bottom end was no up to the task ?? I am being forced to upgrade to forgies so this does not happen in the future but i dont know why i need forgies... stock should be enough but in this case it could not handle my style of driving

forgot to mention that i do 140ks a day in the car to drive to work and back and I aint shy on kickin people's ass

The car went hard even though it had the noise.. what cracks me up is that it went that good with a totally screwed engine.. so thumbs up all round - guess i gotta look on the bright side of the situation and build a tough engine this time.

Guilt Toy..

Any idea why the bottom end had such a catastrophic failure?

There must be a reason, not just because it was a stock bottom end.

If number 6 had spun... Usually that's a sign of rod bolt stretch from my understanding?

Edited by Guilt-Toy
Cubes Grand Master

Cubes

Posted
Posted

A lot of the rb30 blokes are running precision hypereutectic pistons with either nissan or king bearings, some run acl.

Apparently the acll hypereutectic pistons are shiet. :laugh:

There's a bloke here on sau s3girl, he's been pushing 373rwkw through his rb30 running std bearings, bolts and hypereutectic pistons with a GT40 bolted on the side for quite some time, I believe rev cut is around 7k.

Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted

make one yourself!

where can i buy a 1 mm restricter? why don't all the big brands sell restricters that size. how much bigger should i drill out the oil drainn holes in the block and head?
the_tonkau Community Regular

the_tonkau

Posted
Posted

Sorry for the bad news Guilt Toy :laugh: . Keep in mind that a failed oil pump will kill any engine even if it has forgies and good rods/bearings etc. My 25/30 vct engine has no restrictors but one oil feed blocked off. It had a set of new(apprently) lifters put in during the build but it tics quite loudly on one cyclinder ( I think only one) for a few seconds after start up..... I suppose I will have to try changing the lifters first but its super pricey for new ones and using s/h ones could be dodgy and doubling the job if they are stuffed too! In the past for me , s/h lifters have manage to suck in gunk when transferred from one head to another. As they fully extend with no load when you take them out, mine seem to have become clogged and you can't clean them!!

Good luck! :)

BezerkR32 Veteran

BezerkR32

Posted
Posted

i agree, and i dont think an oil pressure problem caused piston ring failure either, sounds like severe detonation.

If your spinning bearings, I don't think you need forged rods and pistons.
Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted

I did not give this engine a easy time. Its time to upgrade.. New engine specs will be

Aries Forgies

Spool Rods

Crank collar fitter to stock RB26 pump

fully balanced bottom end

Possible valve spring upgrade (does anyone know how much the stock rb25det head valve springs can handle before they start floating?)

Might push the power to 450rwhp then and more for dyno sheetoff's

Cubes Grand Master

Cubes

Posted
Posted
I did not give this engine a easy time. Its time to upgrade.. New engine specs will be

Aries Forgies

Spool Rods

Crank collar fitter to stock RB26 pump

fully balanced bottom end

Possible valve spring upgrade (does anyone know how much the stock rb25det head valve springs can handle before they start floating?)

For the price of the spool rods its pretty hard to say no. :D

I was talking to one bloke a little while back via PM that began experiencing float at 20psi through is r33 rb25det head. I believe he may of went with a set of springs from PerformanceSprings. ~$285 for a set.

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