Piston ring size question

ASSISTANCE Hybrids & Advanced Aftermarket Engine Performance
1

Hello. I’ve got a set of 11.5:1 SRP pistons in a 0.5mm bored over B18a1, making a total bore of 81.5 mm. (Or equivalent to 3.20866 inches.) The engine burns oil, and I’m changing out the piston rings. Now, after we hone the cylinders, would I still use 3.209" (+0.002) piston rings, or should I use a slightly bigger sized ring to compensate for the new hone?

In terms of the piston ring I am replacing the part number is as follows:

SRP Piston Rings: 867-JXC0F4-32092

Ring specs are as follows:
top ring: 1.0 mm
2nd ring: 1.2 mm
3rd ring: 2.8 mm

Thanks!

-Andrew

2

honing the cylinders doesn’t take away enough to need larger rings. use the same size.

3

and have someone more competent hone the cylinders this time. its obvious your rings never seated right, or you wouldnt be burning oil.

4

The LSvtec came WITH the car when I bought it a few weeks ago. The original owner bought the block off of ebay. And thanks for the advice. I actually was planning on having the bum sleeping at a bus stop hone my engine cylinders.

5

I don’t think a bum would do a very good job.

It’s a good thing you’re taking my advice.

6

:rofl:

it’s not just the hone either…not being properly broken in will cause poor ring seat. but hey, if it’s fucked up this time at least we’ll know for sure it was your fault. :up: