rebuilt 914 2 litre 3 bolt heads

[damo99]

i have a set of Porsche 914 2 litre 3 bolt heads .
they have been rebuilt with 44mm x 38mm valves
and a bit of welding done to fix cracks( i think)
the re-builders where a place called WC PERFORMANCE PRODUCTS
i am hoping this is not the place called west coast core but i think it is
anyone ever heard anything about them (good or bad )
i got these real cheap from someone who bought 2 sets back to australia
and only used 1 set
also i have noticed that the some of the pushrod tube locations
are about 6mm different to standard 2 litre heads .
as my exhaust is now pushing on 2 pushrod tubes ( # 1 & 3 exhausts)

[wreck]

Damo for your interest google a guy called Tony Knight of Knight's Engines in Adelaide . He did a head for a M20 BMW 2.8 litre straight 6 , NA running E85 with 45mm webers , 390 flywheel HP !! NA .
A friend is getting a BMW head done through him , it would be interesting to hear if he's played with type 4 heads . or what he could do with them .
My engine is taking for ever, just got the heads back from getting the seats fitted ,so started porting . I've read a lot of Len Hoffman's advice on here and also a book by David Vizard .The head machinist I use didn't want to weld the heads to change the plug angle because of reliability issues on a street engine so I'm stuck with the standard plug angle . Hopefully start work on the cylinders shortly (deutz 103mm) .

[Clatter]

FWIW,

West Coast Core used to be a place called Mark Stephens.

Good old Tehachapi..'
Tehachapi to Tonopah....
Oh, sorry... Heads, that's right..

I had a set of mark Stephens heads in my bus for a few years.
And while the guy was certainly a hack, he did try.
He was known for putting seats in with more interference 'crush' than anyone else.
While you might find other issues (my heads had loose exhaust studs) the seats in my heads stayed in place.
The seats is certainly where most head places fusk it up..
My guess would be that WCC does it like MS did..?
I'd run 'em, m'self, for what that's worth.
Just keep an eye on the valve adjustment for the seats coming loose.

As for the pushrod tube hole issue.. Got a pic?
The only thing I can think of would be that you might have a set of early heads 'made' into 2.0 914?
Maybe?

[Piledriver]

The earliest heads took smaller OD pushrod tubes.

Pics might help.

[wreck]

What is the normal crush on seats ? I think Liddle Heads who have done mine use .011" but not 100% sure on that figure.

[damo99]

The earliest heads took smaller OD pushrod tubes.

Pics might help.

thats probably what i need
now i just have to find some.

clatter thanks for the info on mark stephens and wwc .
i am going to run them for now.
i will try and get some pics tomorrow

[raygreenwood]

Actually...from the last pictorial article in one of the magazines.....from like 1995 or so ahout Mark Stephens work on type 4 heads......he used a godawful staking method of cutting a large chamfer on the OD of the cylinder side of the seat....and then peening the aluminum into the bevelled groove around the circumference of the seat. The picture I saw used a blunt drit and 3 lb sledge. Absolutely shag-nasty looking......I was appalled.

This technique can work....when the peening is done with a ring shaped tool made to the right size......in other words do it cleanly....dont just hammer it to fit.

Chamfering the OD edge of the seat that goes diwn into the seat bore....and then using about .006" interference is just plenty. Ray

[wreck]

my bus heads were done with chamfer and peened , the guy had made a tool that located in the guide and swivelled uniformly around the seat . He didn't want to do it at first but we reasoned that it's better for the seat to sink into the head (if there is an issue) then fall out and possible engine damage .

[damo99]

i am thinking of ordering some l6 DRD heads .
i will run the new 2270 in on the 3 bolt 914 heads
then put the DRD heads on latter .
i have got a few long drives to do in a few months (1000 + klm's)so the last
thing i want is a dropped seat from sub standard heads .
it should cost about $2500 including shipping for the DRD heads

[vinnytang]

Hey Damo,

I'm also based in Melbourne, and would be interested in purchasing your 2.0 heads if you're planning to get rid of them.

I've sent a PM with my contact details.

Thanks!

[Piledriver]

Call ahead and make sure DRD still does T4 heads.
Use paypal or at least pay by actual credit card (not debit, not by check) so you can get a refund.

[damo99]

drd still do type 4 heads
i spoke to them about a month ago
they also take paypal so you have some protection with your money
they have a 4 week build time from your order

[Clatter]

FWIW, my Mark Stephens heads had the seats peened in with some type of semi-circular ring tool.
Looked like they got one hit for half-way around, and another to finish..

Who knows if WCC does everything the same as MS.

Funny, my friend Damon, who is on these forums, and I built a motor with, was talking VWs with a guy last week, who just so happened to be Mark Stephens!
Small world sometimes..