Thread: DE to Ve head swap question.

I think none. With the complete VE motor you dont need fabrication for the oil feed, you already have the strongest Oil Pump and whatever is not better than the DE will hold up just fine anyway.

If you use the DE block, you have a 8 counterweights crank vs the 4CW on the VE. Opinions are divided here, but some say the 8CW is better to bring to higher rpms (8500-9000 rpms+).
The DE rods look also slightly "stronger" than the VE ones, but you may have problems with the cams/valves touching the pistons. And since you want 200WHP, you will need the biggest cams and some cam gear adjustment: this is not going to happen on DE pistons that dont have valve notches.

Hey guys, I have a sr16 pistons (1mm dome shaved for lower RC) on a DE block, and VE head, Can I use sr16 n1 cams?

Thanks

Yes you can!

Ok, then no problem with N1 cams, right? no valve issues (hit the pistons), right?

Thanks you

Yes the pistons in the 2L sit at the same height at TDC as the 1.6L so they are fine with the big valve notches in the 1.6L pistons. Lots of people have done this before.

Here's something to think about: the SR16 piston has shallower valve reliefs/notches than the standard 20VE piston. It's between the 20VE and 20V when it comes to valve notche clearance. The N1 piston has the deepest valve notches. Forget what you heard or read in the past.

With such a big dome, the SR16 piston gives an illusion that it has deep valve notches. What really counts and the area you need to look at is the outer area of the piston also called the piston quench/squish zone.

It's interesting what you find when you measure things for yourself instead of reading internet "facts".

That sure is interesting! I did wonder about this in the past but so many people seem to have used them I figured it was true so proves again there is only one way to be sure!

For interest how much less clearance is there than stock SR20VE pistons?

Then, What do you think? Can I put a N1 cams in my sr16ve head, and sr20DE block, without valve issues (hit the piston)?

I don't want buy a N1 cams if doesn't work inmy set up!!!

Thanks a lot

Roughly .020". Piston to valve clearance is closest around 10BTC and -10ATC.



To get the most out of the N1 cams you will need to play with the cam timing. The DE pistons won't allow you to set it at the optimun setting(a little bit more overlap). I would say save your money and run the regular SR16 or 20V cams. Upgraded valve springs are a must if you plan on running DE pistons. Look at all the blown VE engine threads, most of them were running stock valves springs with the stock cams.

Thank you 5speed, but right now I have a sr16ve pistons (No DE pistons) in my sr20DE block, and sr16ve head. Can I play with the N1 cam timing with this pistons (and this setup)?

If yes, If I can put the N1 inmy setup, and play with the timing, CAn I rev safe to 8.500 rpm with stock springs and retainers of my sr16ve head?

Thanks a lot