Ok so I understand that revups have variable valve timing on both intake and exhaust... I have a revup.

So if I found some ported/polished heads with all upgraded springs and valves, would I be able to put my revup components onto that head?

 

just be careful of the springs. there's a TSB as I recall....

 

http://www..com/forums/149-forced-in...-up-motor.html
ah...memories. Toykilla was a d!ck.

 

Non rev heads in a rev up, you will need to get the extra holes machined out. Not a big deal.

 

Tbs?

So pretty much just drill new holes? I think i could manage that lol. Thanks!

 

I'd suggest letting a machinist take care of it.

 

Haha well obviously. But I am glad it's at least possible. Haven't taken my heads off yet to compare

 

Oh and you were completely right. I had the holes for the sensors drilled in by a machine shop. I have almost 100 miles on the new engine with those heads and no problems at all. Thank you much!

 

Anyone have some pics that show the difference between revup heads and no revup heads?
I began a NA project and I'm interested to choose revup heads and no revup heads, but I don't know what's the difference for the OEM heads.
Thanks

 

2 extra holes in the back for sensors , that is it. They are easily drilled out for using non rev heads on a rev up and easily capped if you run rev up heads for a DE