Twin Plug Heads

[Racerbvd]

Who is the “GoToo” shop to have heads machined for twin plug?
The guy who use to do our work has retired.

[mepstein]

Anyone who rebuilds heads should be able to add the extra spark plug hole.

[brighton911]

Cgarr (Craig Garrret) does fine work and his rates are reasonable too.

[Dpmulvan]

Originally Posted by brighton911

Cgarr (Craig Garrret) does fine work and his rates are reasonable too.

+1 for Craig

['78 SC]

+1 for Craig.

I built a twin-plug engine and encountered these other issues:

• decide on 12mm or 14mm spark plug holes
• bore exhaust valve covers for lower plugs
• open up RR chain box for #4 lower plug
• modify LF engine tin for #3 lower plug

I went with 12mm lower spark plug holes after confirming I could get suitable spark plugs for uppers and lowers. I sent Craig the valve covers to be bored. The chain box was easily modified with a Dremel tool and the engine tin required some hammering.

[Turbo_pro]

If timing is important you might give Supertec a call. I believe they have a two week turn-around on head work. All machine work done in house.
A friend just got a performance 2.7 built in less than 30 days after it hit the top of the list.

[snbush67]

772.286.1660
bill@xtremecylinderheads.com

3471 SW Palm City School Ave
Palm City, FL 34990

[Racerbvd]

Thanks for the info.

[icarp]

Byron, I have had Bill's do 5 sets of 911 heads in the last 5 months . The customer service and product is first rate , what I am used to from the old days . The tech is also top notch , total research .

Ian

[Jeff Alton]

Our local guy we have been using for over 20 years, always perfect. But it is a long way for you to send heads, though with our dollar being minimal, may make sense.....

[mikedsilva]

Originally Posted by Jeff Alton

Our local guy we have been using for over 20 years, always perfect. But it is a long way for you to send heads, though with our dollar being minimal, may make sense.....

Maybe I should send mine there too !

[mepstein]

Originally Posted by Jeff Alton

Our local guy we have been using for over 20 years, always perfect. But it is a long way for you to send heads, though with our dollar being minimal, may make sense.....

The exchange is good but shipping to CA is usually fairly pricey.

[1973914]

Bill @ extreme built my heads. Great shop and in your state

[flat6pilot]

+1 for Craig (garrett@iserv.net) He did a set for me last year.

[bavaria911]

I used Anchor Atlantic here on the East/North East coast.
https://anchoratlantic.net

[Turbo_pro]

These are the heads Supertec did for my SS 3.2



I think Supertec is one of the few Porsche engine builders that do their own machine work in house.

[Jeff Alton]

Originally Posted by mepstein

The exchange is good but shipping to CA is usually fairly pricey.

Yes, you are 100% correct.

We can do a shipment to 98230 and we import them across the border. However, there are many great options inside the US, some mentioned in this thread.

Cheers

[mepstein]

Originally Posted by Jeff Alton

Yes, you are 100% correct.

We can do a shipment to 98230 and we import them across the border. However, there are many great options inside the US, some mentioned in this thread.

Cheers

I agree. We use a top notch machine shop to rebuild our heads but one of my employees has a mill and could do the twin plug in house if he wanted to. It’s not rocket science to drill a hole on an angle and tap it for a spark plug.

[Jeff Alton]

^^^^^ exactly! Despite being reviered by many, like you said, it is not rocket science. Just simple machine work.

Cheers

[trials935]

Don at EBS does a great job. I've had about 5 sets done, no issues.