So I had a bit of blowby... - ZR-1 Net Registry Forums

XfireZ51 · 09-04-2017

Quote:

Originally Posted by GOLDCYLON

Is that the Camaro clutch disc Dom ?

The one I am replacing is a stock OEM LT1 clutch disc. So will be using the Centerforce. With 345s in back, I probably could use the clamping force.

XfireZ51 · 09-07-2017

Below is a view of the top compression ring from #7. Also, motor is starting to go back together. Before Pete started, we discussed cc'ing the heads just to make sure we had all uniform chambers. Pete verified that they were uniform
40cc chambers. We did this on the suggestion of Marc H. Wanted to check if there was some other explanation for compression being overall somewhat lower on the driver's v passenger side banks. However, the FSM states compression should not vary greater than 15% from low to high cylinders. We're ok there (210 v 245). And FSM states that high end of adequate compression is 200psi. So we are over that by a significant number.

WARP TEN · 09-08-2017

Quote:

Originally Posted by XfireZ51

Below is a view of the top compression ring from #7. Also, motor is starting to go back together. Before Pete started, we discussed cc'ing the heads just to make sure we had all uniform chambers. Pete verified that they were uniform
40cc chambers. We did this on the suggestion of Marc H. Wanted to check if there was some other explanation for compression being overall somewhat lower on the driver's v passenger side banks. However, the FSM states compression should not vary greater than 15% from low to high cylinders. We're ok there (210 v 245). And FSM states that high end of adequate compression is 200psi. So we are over that by a significant number.

Did the little pieces of the ring stay in the groove or did you have to go fishing in the oil for them?--Bob

XfireZ51 · 09-08-2017

Quote:

Originally Posted by WARP TEN

Did the little pieces of the ring stay in the groove or did you have to go fishing in the oil for them?--Bob

Bob,

Fortunately, the ring pieces all stayed within the ring groove. No damage was done to the cylinder bore. U can still see the xhatch pattern on the Nikasil.

09-07-2017	#2
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: So I had a bit of blowby... Below is a view of the top compression ring from #7. Also, motor is starting to go back together. Before Pete started, we discussed cc'ing the heads just to make sure we had all uniform chambers. Pete verified that they were uniform 40cc chambers. We did this on the suggestion of Marc H. Wanted to check if there was some other explanation for compression being overall somewhat lower on the driver's v passenger side banks. However, the FSM states compression should not vary greater than 15% from low to high cylinders. We're ok there (210 v 245). And FSM states that high end of adequate compression is 200psi. So we are over that by a significant number. Last edited by XfireZ51; 03-08-2024 at 02:10 PM.