Pinto head re-seated. No valves!

nuckenfutsmk1 · 01-05-2010, 09:06 AM

Picked up a head thats been ported, polished and reseated. Its a bare head with cam removed ( which i have that he said has a pritty serrious grind - I wont be using) Where and how could i get valves that are cut to the same degree as the seat to match. Can an engineeer determine what degree its been done and match or what. The original guy that did the work has since gone out of business, not because of his workmanship - so theres know more contact with him. I think it worth while pursuing as theres about 20hrs work that been done to it. I have spare heads and parts could these be used!

Stainless valves????

Engine Guy · 01-05-2010, 02:45 PM

The valve seats will be cut to 45 degrees... as long as the diameter of the seat has not been changed then any standard valve will fit.

Don't bother with stainless valves.

Cheers
Engine Guy

nuckenfutsmk1 · 02-05-2010, 09:12 AM

Na therve been opened up by around 2mm, both inlet and exaust. there are 2 types of degrees that have been seated in. one at 45' and the othe at about 25'. Would this be easily worked out and copy that grind to the new valves

Les · 02-05-2010, 06:40 PM

Any engine mod workshop should have a gauge to check the seats and sizes and should be able to put you on the right track
Cheers
Les

Billit1000 · 02-05-2010, 10:17 PM

By two types of degrees do you mean different inlet to exhaust, or there's two angles on each seat? There will normally be a 70* under the seat, a 45* seat and a 30* top cut in your basic seat job. The only variables to this are some diesels and real early (pre '70ish) engines had a 30* seat and some high performance (pro stock and the like) use a 50*-55* seat for increased performance thru better transition to the chamber, but your head wont have this.

Valves only seat on one angle, some people cut a 30* angle and others, behind this to increase flow, but this does not affect the seat, only helps air flow over the valve.

You can get oversized valves for these heads but be careful on overall lengths as this greatly affects valve train geometry. Always use new followers with a new cam, and don't mix them up after it has been running.

nuckenfutsmk1 · 04-05-2010, 05:07 PM

http://cgi.ebay.com.au/ws/eBayISAPI....=STRK:MEWAX:IT

any good any one?

2T Institute · 04-05-2010, 10:47 PM

Why do people continualy refer to ports as being 'polished' ? There is only 1 thing worth polishing and it ain't ports

Billit1000 · 08-05-2010, 12:10 AM

Don't buy no name brand parts off ebay. 99% of the time you end up with incorrect fitting parts, junk, or both. Go buy some tuff-trided EVL valves, they will be fine for you. Many people put bigger valves in their heads, but I think this ruins the short turn of the heads. I stick with the standard sizes.