Thread: 10:1 SR20de Lower end with VVL Head, what CR?

Looking to put a SR20ve cylinder head onto an up-manifold U14 bluebird 10:1 Sr20de compression block. A few questions:

1. Will the DE pistons need to be notched for valve clearance for
a. stock cams?
b. 16ve cams?

2. If answer to 'a' and/or 'b' is yes, by how many mm should they be notched?

3. What will be the estimated CR for such a build?

Thanks

Peace

Yeah, they wil need to be notched. Exactly by how much I do not know but it is quite a bit. I tried to install a ve wth stock cams on my 10:1 de, not even close to clearing.

Dont do it!!! Stock VE piston will yield better results!!!
Lighter piston
Low friction rings
And compression raise not worth it!!
It will clear stock VE cams @ 0,0
SR16 VE cams @ 0,0 will be too close to piston
You will need to notch about 1mm on the same angle as stock VE piston!!
After all that it will yield less power than a stock VE piston!!

Didnt know all the details where weight is concerned, but I told the guy who wants to do it that it would have been cheaper to get a complete vvl. I was looking at the labour cost involved and the fact that the motor will be pulled up. I thought the only gain would have been the slightly higher cr, but seems not even that would worth the effort.

Thanks for the input

Peace

Well, if its RR 10:1 DE then its same piston/ring style as VE.

Yes, they use the same rings, but the pistons are different.

Peace