Xu7 Head Polishing,porting,upgrading,how To?

[pugpete1108 62 1 Cars]

Heads all ported, ran into some trouble with the double springs as in I could fit them to the xu7 head because the guides wouldn't allow the smaller rs seals.

 

Have opted to fit the xu7 springs and seals with the rs cams, as after measuring the bind on both sets of springs the were identical anyway( didn't check actual spring pressure tho).

 

Was also advised that the xu7 springs are progressive being tapered? So would be harder at more lift (how true this is I don't know)

 

Anyway what's the worst that can happen

 

Should have the engine back in this weekend so will let you know

[welshpug 1,657]

erm, valve bounce

[pugpete1108 62 1 Cars]

But only at mega high revs?

 

I've got spares to rebuild if it all goes south anyway.

 

If I'd have know the hassle of this conversion I'd just have bought a good rs head and fitted that which is what I'll do if this goes wrong.

 

From reading a lot of posts on the gti6 register it seems its done quite a bit on the xu7 running rs cams with no issue.

Edited April 10, 2013 by pugpete1108

[gnw 0]

i know a XU7 with RS cams that was reving 7800 rpm, with stock head

 

 

174Bhp

 

and about the coil be progressive, it's possible, because they are conicals... and that makes them lighter, that, revs more too

 

oh! let me remind! it's very important polish the exhaust!!!! but not the admission.. polished admission is worse!!! they must to be little rough

Edited April 11, 2013 by gnw

[calvinhorse 870]

174bhp stock head, show me this

[gnw 0]

my head!

 

mounted today!

 

 

 

 

 

 

the RS manifold

 

 

[gnw 0]

and yes.. those are RS cams to

[welshpug 1,657]

that's no stock head.

[pugpete1108 62 1 Cars]

Xu7 valve train?

[gnw 0]

that's no stock head.

 

 

no man! this is my head!!!