Jump to content
SAU Community

Recommended Posts

One of the most common mechanical failures in RB engines is the smashing of the oil pump driven gear.

This is due to the std size, wear and slop on the std crankshafts, the std snout not being long enough even for the standard pumps!!

std is about 5mm.. drive on a 18mm oil pump gear..

where is these collars drives it on the full 18mm..

this is a serious design fault which was resolved in the r33 and r34 rb26 engines..

but was not resolved in any other models!

all rb30s need one.. all r32 gtrs need one.. and all rb20&25 cranks need one

this enables reilability at 8-9000rpm

without a std oil pump would shatter due to the uneven load on the drive gear.. quite common in high reving r32 gtrs..

if you are rebuilding any RB engine, and fitting a twin cam 20 25 26 pump. this collar is a must..

the only reason pumps fail apart from engine blow ups.. is the drive shattering (collar) or low pressure (backing bolts loosen up and bleed oil)

this also replaces the oil pump seal seat which can become very warn and not seal without a fresh collar.

Requires machining of your crank to fit.

Sell for 200 dollars, and comes with an oil restrictor

Link to comment
https://www.sau.com.au/forums/topic/215478-jun-crank-collar/
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Yep, the closest base tune available was for the GTT, I went with that and made all the logical changes I could find to convert it to Naturally Aspirated. It will rev fine in Neutral to redline but it will be cutting nearly 50% fuel the whole way.  If I let it tune the fuel map to start with that much less fuel it wont run right and has a hard time applying corrections.  These 50% cuts are with a fuel map already about half of what the GTT tune had.  I was having a whole lot of bogging when applying any throttle but seem to have fixed that for no load situations with very aggressive transient throttle settings. I made the corrections to my injectors with data I found for them online, FBCJC100 flowing 306cc.  I'll have to look to see if I can find the Cam section. I have the Bosch 4.9 from Haltech. My manifold pressure when watching it live is always in -5.9 psi/inHg
    • Hi My Tokico BM50 Brake master cylinder has a leak from the hole between the two outlets (M10x1) for brake pipes, I have attached a photo. Can anyone tell me what that hole is and what has failed to allow brake fluid to escape from it, I have looked on line and asked questions on UK forums but can not find the answer, if anyone can enlighten me I would be most grateful.
    • It will be a software setting. I don't believe many on here ever used AEM. And they're now a discontinued product,that's really hard to find any easy answers on. If it were Link or Haltech, someone would be able to just send you a ECU file though.
    • Yes sir am asking is there possible way from aem tuner from wiring pins 
    • Have you checked cam to crank timing and confirmed balancer marks are correct?
×
×
  • Create New...