Thread: 88mm on a budget!! (Not on budget anymore!!!) New Dyno!!

Head gasket have never been a problem with 88mm builds since I myself did the VVL lubrication externally and I use Cometic head gaskets that are available for SR20DE in 88.5mm bore in different thickness. The myth of the stock sleeve not holding 88mm bore has been broken!!

This is why we say people need to start trying these kind of things. Theory can only take us so far.

Not saying its not possible to do 88mm, clearly its possible. But for now, nobody really knows how long it will hold. Lets see after 10-50k miles. But looks like it will be ok as 1mm on the outside isnt too much.

I first stated that it should be fine at 88mm when i dropped a valve shattering the piston in my ve, that put the small end of the rod through the cylinder wall. After looking at how thick the cylinder wall actuall was I mentioned that 88 mm should be fine. Its crazy that it took this long to get one running and done.

88mm been done before, this little forum is narrow scope when you consider the whole world....

I thought the BTCC engines utilized a 88mm bore.

There are a few 88mm turbo cars around for some time also.

i agree jagy... payu better take care of this one. hes the community's rep on this type of project

I think it is still too early to conclude that the myth has been broken. We need to observe the stresses applied over a longer period of time. Additionally, I think they this may only hold true for the lower cylinder pressure N/A applications.

yeah, there isnt alot of cylinder wall left at 88mm and definitely wouldnt do a turbo build on one thats for sure. But for n/a purposes I dont think it will have any downfalls.

From my own measurements I took of my chunk of cylinder wall is that the stock cylinder wall is about 3mm thick so 1mm off on each side to bring it to 88mm bore would leave about 2mm of cylinder wall left.

I am all for progress and improving constantly, a few comments were throwing me off acting like 88mm is a brand new bag.



Sure were! Nice memory, also. I hope you are catching up on sleep that is much needed and deserved!

88mm x 82mm the BTCC engines were but they have a rev limit of 8500 RPM. Something not all of us have to deal with. (lucky you!) The engine for the BTCC cars was not the strong point. The suspension absolutely crushed the competition. Any time you see videos of the races in the winning seasons they had you can see in the straightaways, the little Nissan was being passed and in corners, it was just carving the other cars/drivers up.