Engine compression

bernhard · Post by **bernhard** » Sat Jun 10, 2006 5:53 pm

What is the compression of a Good Pinz engine in PSI? Both my Pinz measure 160-163 PSI. I’m guessing this is fine but just wanted to confirm with other owners out there.

Thanks

Bernhard

Jim LaGuardia · Post by **Jim LaGuardia** » Sat Jun 10, 2006 6:14 pm

That is the top end of the scale, I find most to be around 125-145psi

hkmp5 · Post by **hkmp5** » Sat Jun 10, 2006 6:22 pm

Hello Bernhard,
My pinz engine runs between 150 to 155 psi.

bernhard · Post by **bernhard** » Sun Jun 11, 2006 11:42 am

Thanks guys,

Looks like both my engines are in good condition.

My 712 always pinged on regular gas so now I run supper or supreme. I was under the impression you could run these engines on very low octane gas? I guess what is considered low octane in Europe is high octane here.

2012 · Post by **2012** » Sun Jun 11, 2006 12:06 pm

don't you just have to retard the timing a bit to use 87 octane?

Charles · Post by **Charles** » Thu Jun 15, 2006 11:23 am

Hi Guys,
That seems like pretty awesome compression to me! Last time I did a leak-down I had compressions of about 145-150ish (with a cold engine though)...

Also, I've been running 87 octane in my Pinz for a long time with no ping/knock at all (and I am a scooch advanced in timing). I do have the civ ignition / spark though so maybe that makes a difference as well.