Cylinder leakage test

rebelrouser · 11-08-2024, 09:48 AM

Yes, a NA engine with tight end gaps should test better than 10% on a warm engine a cold engine will read slightly more leak down. A large gap nitrous or blower engine will leak more cold. What I do is leak my engines on the stand when fresh right after taking them off the dyno cold, save those numbers. Then you have a baseline, when leakage starts to increase, I know it is time to save my pennies for a rebuild. I don't race class just bracket and index, but I see very little loss in ET until leakage gets about 30%

11-08-2024, 09:48 AM	#14
rebelrouser Junior Member Join Date: Apr 2023 Posts: 7 Likes: 0 Liked 8 Times in 3 Posts	Re: Cylinder leakage test Yes, a NA engine with tight end gaps should test better than 10% on a warm engine a cold engine will read slightly more leak down. A large gap nitrous or blower engine will leak more cold. What I do is leak my engines on the stand when fresh right after taking them off the dyno cold, save those numbers. Then you have a baseline, when leakage starts to increase, I know it is time to save my pennies for a rebuild. I don't race class just bracket and index, but I see very little loss in ET until leakage gets about 30%