Jump to content
SAU Community

Recommended Posts

Did a compresion Test this afternoon, on a COLD engine. I know it is suppose to be warm but couldn't do it then.

So i got

Cylinder 1 = 150 psi

Cylinder 2 = 152 psi

Cylinder 3 = 153 psi

Cylinder 4 = 151 psi

Cylinder 5 = 150 psi

Cylinder 6 = 150 psi

This was on a cold, well possibly sligtly, slightly warm engine. SO looking good.

Also got some shots inside each cylinder boore (photos), all look spot on, no leaning out spots, all the same. Plugs looked all the same, but cylinder one, propably a bit ritcher then any other.

So all good, new ecu seams ok. Adjusted the timing to 18 degress and will see what happens. All plugs are now 0.75mm and no missfire. YEEHHHAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA.

Gone try and get a hold of a leak down tester and see what's what. But happy so far. Engine has done 80K and has had a bit of a hard life the past 10K or so with me behind the wheel.

Link to comment
https://www.sau.com.au/forums/topic/153261-got-my-compression-tetsed/
Share on other sites

One thing, i read this on another forum, does it actually matter.

"""""Yep as the others said, variance is definitely more important because the absolute readings of every gauge are different. I would try disabling the injectors as I found they deflated the readings by upto 10psi. So pull the fuse to the ECU or disconnect each injector if its accessible! Oh and, dont forget to have all 6 sparkies out when you do it, and also have the throttle wide open"""""""

I had the injectors pullsing still.

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

    • The cross sectional area of a circular hole scales with the square of diameter. So a 2mm diameter hole is 4x the area of a 1mm hole. Not double. The 1.7mm hole is nearly 3x the area of a 1mm hole. You do not need restrictors at both ends of the oil supply line. If you have new, additional restrictors at the turbo end, that you did not have before, then you do not need a restrictor at the inlet end.
    • Hi all. Been a while but things are moving along. I just have something that I am wondering about. Since I will use OEM turbo oil pumbing, I got myself a new bolt, the one that goes into the engine block oil feed. As I recall (and see visually) this bolt comes restricted with I think a 1.7mm hole? Not quite sure but it was something around that size. The turbos have 1mm restrictor bolts installed, as necessary due to ball bearings and my higher oil pressures. Can I now just use that OEM bolt with the 1.7mm hole in for the engine block or will this actually be too much oil flow restriction and I have to drill it out first? In my head it would make sense for the bolt to be at least 2mm wide as both turbos take "1mm of oil flow". Do let me know if my logic is flawed here, I just want to make sure I don't kill my turbo bearings with too little oil. Don't know if I can trust the saying I read somewhere that ball bearing turbos essentially only need an oil mist
    • There are several aftermarket options available, from not-too-painful moneyhttps://justjap.com/collections/driveshafts-bearings/products/d-max-reinforced-replacement-rear-driveshaft-set-fits-nissan-s13-s14-s15-r32-r33-r34-c35 and  https://justjap.com/products/crank-motorsport-billet-rear-axles-fits-nissan-skyline-r33-gts-t-r34-gt-t?srsltid=AfmBOorQk4xkGUa98kO7v2ePLUiNt-HRrM2AwWNw9mbSIVE1ujBVwY__, all the way up to The Driveshaft Shop https://driveshaftshop.com/skyline-cv-axles/
    • Yeah based on old XRC5964S specs, it looks to be roughly GTX3576R sized? But this 5964S compressor will flow 90lb airflow somewhat similar to the compressors in both the GTX3584RS or G35-1050.. I fully expected the 0.64 rear A/R to choke up top - seems way too small from typical convention - but these are seemingly beneficial over the prior 0.82 results.. Be interesting to see if he comments on the EFR question in that thread - he mentioned in a prior video that BW EFR's were the "cats pajamas 10 years ago", but by the sounds of things all his kits have been using Xona for quite a while now.
    • Yeah it’s still got the oem manual gearbox and clutch, only kinda mods are a blow off valve, coil overs, and a aftermarket intercooler. Also had it for about 2 months now with a lovely midnight purple paint on it.
×
×
  • Create New...