adictionbass

whats up guys, did a compression test on my built gsr. 84 mm, 9.1:1 pistons (head has been milled some, figure around a 9.3:1 c/r) Motor has ~75 miles on it with street tuning (15 psi) as a break in. Compression was as follows:

1- 172
2- 180
3- 175
4- 182

I think these number look pretty good, but about how long does it take for the rings to fully seat? or are they probably already there?

B18C1CYA

Rings normaly seat in about 15-20 miles , so I would say your seated

adictionbass

i was under the impression that they will seat more with more miles. For instance people always talk about their motors getting stronger as they put more miles on it. I just have no clue how many

trickeng

the first couple times you get in the gas and build some cylinder pressure your rings are going to seat.

and yes there is some truth to all the internal moving components wearing in over time resulting in small hp gains. but this is more of a thousands of miles thing and god knows i'm not waiting 1000miles to tune or race my car.

s2kdre

if the rings dont seat the first 20 miles then theres something wrong, when they seat, then ur ready for tunning.

99B16Si

there are a lot of variables in this. hone style, the grit of the honing stones, type of rings, etc. If youre worried do a leakdown test. itll tell you if your rings have seated

Justin Klemgold

Go to Benson's site and read how to properly break in his engines.