2JZ-GTE VVTi compression specs

[dori dori]

Its a long one, but does anyone have the factory specs for compression testing a VVTi 2JZ?

Cheers

[cambelt]

a tad more than a non vvti so say 165 psi per pot would be ok.
Dave

[dori dori]

Cheers Cambelt1.

While it does sound right (thats what the motor comp tested to last year) i just want to know the exact specs.

Anyone else?

[Draven]

if you want to pay, I'll get mine tested for comparison (60K kms)

165-175 rings a bell from the UK supra forums.

There's a guy on there called Paul someone (I think), he's a 2jz-gte vvti guru, he'd be the guy to ask.

[Draven]

ps: I'm round at lindens very regulkarly, so if you have a compression testing thingy, I can pop by after work one day.

[dori dori]

Cheers Draven, i'm doing mine today.

[Draven]

results? 10chars

[1JZ-Rolla]

Unless you know that you have a particularly accurate compression gauge, i'd not be too concerned about the number readings, just the variation between cylinders (unless its wildly below spec of course )

[dori dori]

Results in:
1) 157psi
2) 152psi
3) 160psi
4) 155psi
5) 153psi
6) 145psi

A bit all over the place and slight down on number 6. Before the cams all cylinders were 160 or 165psi.

Apparently number 6 is the cylinder to let go so i'm going to look a little more closely at it.

Cheers

[Draven]

interesting, a bit lower than I would have expected.
years/kms on the engine?

[The Real Roadrunner]

may be due to cam duration, throttle closed-open, plugs in or out, or battery voltage also so its hard to say exactly if they are high or low.

no6 seems suspect but you would have to do a leakdown and wet vs dry test also to ba accurate

cheers
linden

[dori dori]

WOT, all plugs out and battery booster in place.

I will know more by the end of the week.

[The Real Roadrunner]

cam specs and timing? the more overlap the less static comp it will make on the guage as the air has more time to escape.

cheers
linden