Hi Guys; Havent been here in a while, but I still lurk around. All of my buick power plants are down at the moment but I am still working on a Buick with a cadillac power plant mind you. Any way, The motor is close to assembly and im at a loss for piston ring gaps with Nitrous. The bore size is 4.350 (+0.050 from stock) so its very very close to a buick bore size. The manufacturer (Probe) does not have a recommendation for gaps, but the bore clearance recommended is 0.0035 to 0.0055, mine were clearanced smack down the middle of the road. The motor is a 10.3:1 static compression BUT, with my cam, the DCR works out to 6.78:1, which leads me to beleive I can run regular 87 octane (not that im going to, but I can). The intended use for the car is 95% street duty, and 5% strip. It will see a 150shot of nitrous maybe twice a year (so like 4 passes per year). And maybe 13 passes on motor a year. I want to set a ring gap for the street, and have it be able to TOLERATE nitrous safely, not gapped for nitrous. What would you think is a good ring gap? If you need more info, I know everything about the motor for measurements, and have lots of pix. Nitrous is new territory for me, and im completely lost for the ring gap. Any help appreciated.
I use total seal rings alot on some of the motors I build for myself and others. They have a great spec sheat on there web site with recomendations for various uses. Id start there. or atleast look up on the brand of rings you have - and they may have there own suggestions and specs.
The box the rings came in say RPM Racing, no mention of gaps on their installation sheet. Ill check out the Total Seal reference.
Azeem, don't rely on Total Seal's gap info unless you can confirm it's applicable to standard ring sets. Total Seal's guidelines likely pertain to their "gapless" ring designs. Devon
