Jump to content
SAU Community

Recommended Posts

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

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

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

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


  • Similar Content

  • Latest Posts

    • Hi. Can someone tell me what brakes(and mainly WHERE) can i buy brakes on R34 GTT? I bought some EBC which SHOULD go on my car(i have GT but it has GTT brakes) but it does not fit, Brakes are "too" small(296mm) Are 310mm be good or? I have 17 inch wheel so no "big boys" but for me driving i just need one that fits and i can get here in EU/Czech.
    • Since winter isn't that harsh anymore in Poland, i will definetely drive it 365 days a year 😉. But if the snow hits i will try it for sure and let U know. Only swap i am planning to do is of course R34 GTR front 😍.
    • Hey. Very valuable information about pitwork, I will pay attention when buying any consumable parts 🙏 As for the carpets - I got a handful of information from nengun, from which it appears that indeed the carpets for the driver's side are OEM. They are not able to show me any pictures due to the long chain of different sales entities but after I place the order, as soon as the goods arrive at the nengun warehouse from which they will send the shipment to me they can send me photos and if my purchase differs from OEM I can immediately return it / cancel the purchase. I think I will give it a try 😉. Of course i'll let you know what's what as soon as i get them P.s. I know the topic is not relevant to the thread, but both nengun and amayama have these SICK 😍 trunk room lamps available. Do you know anyone who ordered them? I need to have one in my car
    • I've managed to find this: Nissan_Stagea_AutechVersion260RS (1).pdf
    • I believe @Duncan has given it a crack at Mt Buller before (in actual race conditions)
×
×
  • Create New...