Jump to content
SAU Community

R33 Compresion

PRO AERO

By PRO AERO,
in South Australia

 Share

Recommended Posts

Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted

It can be low or high for forgies. my engine read 120 in all cyl for a rb30det with forgies.

hey guys just running a compresion test from home whats the comp sposed to be i hear 140-160????now will it be lower for forgies???
Link to comment
https://www.sau.com.au/forums/topic/150775-r33-compresion/#findComment-2806364
Share on other sites
Cubes Grand Master

Cubes

Posted
Posted

Forgies or not.. It doesn't matter. What matters is what comp ratio the given piston returns.

Cam timing, engine temp, piston/bore clearance and the gauge its self all vary the read out.

Mine with was up over 150psi in all cylinders, all exactly the same apart from cyl 3 or was it 4!? :laugh: that was only 1psi down. BUT the motor was stone cold.

I'm just about to give it another comp test *with the same guage* after 50,000km's so it shall be interesting how it comes up.

Link to comment
https://www.sau.com.au/forums/topic/150775-r33-compresion/#findComment-2806509
Share on other sites
pkblade Experienced

pkblade

Posted
Posted
Raa told me 5 percent in their little box on the report. whatever that means. RB25Det was at 125,000kms. enlighten me...
Probably the compression results are within 5% of one another which is acceptable but, they should've still provided a reading for each cylinder in their report. Results for a stockish RB25DET in good condition are generally between 140 - 170psi(newish engine).
Link to comment
https://www.sau.com.au/forums/topic/150775-r33-compresion/#findComment-2807323
Share on other sites
Cubes Grand Master

Cubes

Posted
Posted

Its just a comp guage with 5 little lines between the big numbers. :( I crank until it stops moving.

Unsure on the brand have never taken notice. The old man bought it many years ago, he's not one to buy cheap, he always spends the little bit more to get the better one.

The guage reads out both in bar and psi.

I'm not concerned on the actual final number as it doesn't mean a lot, I'm just stoked how spot on each cylinder is. :D

The old rb20 varied by 5psi when it had supposively done 67,000km's.

Link to comment
https://www.sau.com.au/forums/topic/150775-r33-compresion/#findComment-2808204
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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • funkymonkey
      Howdy Y'all

      By funkymonkey · Posted

      Nice car! I’m glad folks in the US have gotten past the FnF and are buying real cool cars like the 260RS I was with a bunch of mates in Portland about a year ago and spotted a green Stagea (just a regular 2.5T AWD) parked about 2 blocks away and they were like “a what?” So I made a bet with them for a round of beers and said “ok one of you run down there and tell me if the steering wheel is on the correct side” 5 mins later the American comes trudging back up the hill and goes “he’s right guys. Ok what beer do you want?”
    • Dose Pipe Sutututu
      Starting again

      By Dose Pipe Sutututu · Posted

      Should replace OR drop the tank, give it's good clean. Might be worth replacing that entire fuel level/pump/cradle thing with this: https://frenchysperformancegarage.com/products/fpg-s13-180sx-r32gtst-single-pump-hanger-kit-billet-hat-6-v3-fpg-089?gQT=2  
    • R33_Guy
      Speed Sensor replacement

      By R33_Guy · Posted

      Thank you so much for the help
    • GTSBoy
      Speed Sensor replacement

      By GTSBoy · Posted

      Yes it is ATF. I quote @Duncan "it takes a good synthentic auto trans fluid like Castrol Transmax Z" It's not a diff. It's a transfer case. Totally different thing. Yes, fluid will come out the sender hole. No you do not really need to drain it. Just pull the old, quickly poke the new, clean up and top up. But realistically, you should probably take the opportunity to change it anyway.
    • R33_Guy
      Speed Sensor replacement

      By R33_Guy · Posted

      Hey all. I’m looking on replacing my speed sensor on my R33 GTR. Will the center differential need to be drained, and if so, the center diff uses ATF fluid D? I found information on the transmission, front diff and rear diff. Can’t find a for sure answer for the center diff. Any help will be greatly appreciated.
×
×
  • Create New...