Heads for a 2.0

ber911 · 05-11-2005, 01:29 PM

Is it possible to use 2.2-2.7 heads on a 2.0 motor in order to have larger valves without having to find 2.0S heads.
If so is any machining work required and what is the effect on the C.R ?

Robert

ErVikingo · 05-11-2005, 03:22 PM

You can get T heads and have them machined (not the most economical though)

ber911 · 05-11-2005, 04:44 PM

I assume you mean 2.0 T heads machined for larger valves. Will the later heads not work with 80mm P/C's?

Robert

ErVikingo · 05-11-2005, 05:37 PM

I meant 2.0 T's. I assume the later heads will not fit but I have no positive info.

neilca · 05-13-2005, 10:29 AM

Check out this thread. http://forums.pelicanparts.com/911-engine-rebuilding-forum/169250-2-0-heads-2-2-a.html#post1378094

ber911 · 05-13-2005, 04:37 PM

Thats great - thanks for the link.

Robert

Henry Schmidt · Henry Schmidt's Garage

Supertec Performance has a conversion that will allow you to run 2.2m 4.2 and 2.7 heads on a 2.0 cylinder.
The cost is $220 per set of six.
This conversion was designed to return 2.0 "S" heads to 2.0 specs after they were converted (cut to fit) 2.2- 2.7 cylinders.
This conversion has been race tested by to of the fastest vintage racers on the west coast and we have seen no collateral problems.
Five years testing with no failures.

ber911 · 05-15-2005, 03:20 PM

Thanks Henry

Will be contacting you for a set once I am ready to start assembling.

Robert

kenikh · 03-15-2006, 08:21 PM

Quote:

Originally posted by Henry Schmidt
Supertec Performance has a conversion that will allow you to run 2.2m 4.2 and 2.7 heads on a 2.0 cylinder.
The cost is $220 per set of six.
This conversion was designed to return 2.0 "S" heads to 2.0 specs after they were converted (cut to fit) 2.2- 2.7 cylinders.
This conversion has been race tested by to of the fastest vintage racers on the west coast and we have seen no collateral problems.
Five years testing with no failures.

The way I read this is that you can take a set of 2.0S heads that were cut for larger P/Cs and put them back on the smaller stock P/Cs. Henry, how do these work? Do these return the CR and squish characteristics back to stock spec?

I have access to a set of '69S heads that were cut to accomodate 2.7 P/Cs and my '69S has '67S heads that I want to replace with the real thing. These seem to be my ticket (I don't want 2.2 heads, BTW).

On a side note, does this conversion make the 'S' heads race legal again or is it like cutting a second plug hole (even if you don't use it, the heads are illegal). I really appreciate any info; this has me quite excited. Your response will pretty much decide if I make an offer on the heads or not.

Thanks again.