Idle concerns - ZR-1 Net Registry Forums

Jim Nolan · 12-07-2009

I bought a set of plugs with the intent of changing them regardless of their condition. The car had been set up by a tuner after full heads up porting. What I found was all the plugs looked as plugs should look with 500 miles on them. The disappointing part was the passenger side was gapped to .042 and the drivers side had plugs 1,3 and 7 gapped to .035 and plug 5 gapped at .030. The passenger side took some effort to break them loose but the drivers side no effort at all. This tells me two people were working it at the same time. It runs much better now.

The car was dynoed with the plugs like this. Would this have effected the dyno numbers. Based on what I read I was expecting 410-420 RWHP but came up with 397 RWHP or was I being too optimistic.

12-07-2009	#11
Jim Nolan Join Date: Jan 2007 Location: Florida Posts: 241	Re: Idle concerns I bought a set of plugs with the intent of changing them regardless of their condition. The car had been set up by a tuner after full heads up porting. What I found was all the plugs looked as plugs should look with 500 miles on them. The disappointing part was the passenger side was gapped to .042 and the drivers side had plugs 1,3 and 7 gapped to .035 and plug 5 gapped at .030. The passenger side took some effort to break them loose but the drivers side no effort at all. This tells me two people were working it at the same time. It runs much better now. The car was dynoed with the plugs like this. Would this have effected the dyno numbers. Based on what I read I was expecting 410-420 RWHP but came up with 397 RWHP or was I being too optimistic.