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part numbers v casting numbers?

DavidL

DavidL

Active member
My head is not going to be repairable (thanks for the offer Roger).
Now the number on it is 951 104 303 2R but I am seeing alot of 1R heads. Now it has been suggested that this is the casting no not a part no and that the 2 aren't really related. As far as I can see that's the only number on it so no part number then?
951 104 038 04 is the only 951 head no on PET
Can anyone shed any light?
David
 
ok, why is it not repairable?

If your worried about the welding, I'll buy the head off you?

Contact Barry Hart @ Hartech if you need to clarify what yours is, and what others will be the same and fit
01204 302809

R
 
924Srr27l said:
ok, why is it not repairable?

If your worried about the welding, I'll buy the head off you?

Contact Barry Hart @ Hartech if you need to clarify what yours is, and what others will be the same and fit
01204 302809

R
Click to expand...
I have an 88 turbo head that has seen better days if you want it? I rejected it when I rebuilt my engine due to heavy pitting. Got most of a bottom end as well. Block needs a reliner job. Lol and a cam tower.
 
robwright said:
924Srr27l said:
ok, why is it not repairable?

If your worried about the welding, I'll buy the head off you?

Contact Barry Hart @ Hartech if you need to clarify what yours is, and what others will be the same and fit
01204 302809

R
Click to expand...
I have an 88 turbo head that has seen better days if you want it? I rejected it when I rebuilt my engine due to heavy pitting. Got most of a bottom end as well. Block needs a reliner job. Lol and a cam tower.
Click to expand...


Ok thanks, I'm not in need of anything just thought if it was the welding that was an issue? and the Head was to be scrapped I think it's salvageable and worth
repairing, only I know how good the welder is and also the machine shop. I'm just trying to help, it's my day job and nature that's all.

I think the only different on the turbo head is the ceramic exhaust ports ? otherwise the design and valve sizes etc are the same as the 2.5 N/A ?
My 2.5 head has been flowed by LR to produce 28% more CFM.
R
 
one important difference is the exhaust valves, the Turbo's are sodium filled, IIRC they are larger too but would have to do a little reading to be sure....

Pete
 
ok I'm slightly further forward. Having spoken to Porsche if you try and order a new head for a 1990 car or a 1986 car the same part number comes up, 951 104 038 04, oh and they are £1600 incl VAT.
Rob what's the casting number on yours? Assuming the 88 car is a 250 I'd be interested to see where the casting no changed. I'm not convinced that casting numbers bare any resemblance to part numbers. I found a couple of 1R heads at a sensible price but the only 2r had a chip in the ceramic coating.

 
I wouldn't worry too much about having the ceramic coating, and I'd probably have new guides fitted and seats cut in any old head. Maybe you could use a probably much cheaper non turbo head with your valves etc ?
 
DavidL said:
ok I'm slightly further forward. Having spoken to Porsche if you try and order a new head for a 1990 car or a 1986 car the same part number comes up, 951 104 038 04, oh and they are £1600 incl VAT.
Rob what's the casting number on yours? Assuming the 88 car is a 250 I'd be interested to see where the casting no changed. I'm not convinced that casting numbers bare any resemblance to part numbers. I found a couple of 1R heads at a sensible price but the only 2r had a chip in the ceramic coating.
Click to expand...
It's from a 220 car. It is buried at the minute.
 
Cannot believe that I am saying this, but: is £1,600 such a bad price now, all things considered?
 
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