ZR-1 Net Registry Forums - View Single Post - Compression left bank to right bank diff?

Paul Workman · 12-18-2018

I concur with Hans.

FYI:

My stock compression average was in the 195± a point or two.
After Pete phased the cams as part of my porting and headers upgrade, my compression centers around 220#.
Pete and others who have phased the LT5 cams have mentioned that it is not unusual for the cam chain sprocket to slip a tad which results in a situation very similar to what you've described.
Your gauge may be at fault, OR two, it is "SOP" to have a battery charger bring the battery to full charge before doing the testing AND during the testing to keep the battery at full charge between cylinder tests - which you may already be doing - just sayin.

I'm suspicious too, regarding your gauge. But, I wouldn't be too concerned about it - especially if you have an upgrade in your plans: the phasing can be addressed then.

12-18-2018	#3
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,466	Re: Compression left bank to right bank diff? I concur with Hans. FYI: My stock compression average was in the 195± a point or two. After Pete phased the cams as part of my porting and headers upgrade, my compression centers around 220#. Pete and others who have phased the LT5 cams have mentioned that it is not unusual for the cam chain sprocket to slip a tad which results in a situation very similar to what you've described. Your gauge may be at fault, OR two, it is "SOP" to have a battery charger bring the battery to full charge before doing the testing AND during the testing to keep the battery at full charge between cylinder tests - which you may already be doing - just sayin. I'm suspicious too, regarding your gauge. But, I wouldn't be too concerned about it - especially if you have an upgrade in your plans: the phasing can be addressed then.