(Catching up) OST-080 (and OST-074):Dan Dabbles in Dubs
06-13-2022, 05:33 PM
Post: #1
(Catching up) OST-080 (and OST-074):Dan Dabbles in Dubs
I have a friend with a few Porsche 924s.....

OST-074: 3 down........ I found in both Porsche heads the bowls to already be too large for making substantial improvements - short radius work and simple seat/bowl clean-up

[Image: AEU86 AE86 - (Catching up) OST-080 (and ...es in Dubs]

The big thing with both of these heads - guide wear

[Image: AEU86 AE86 - (Catching up) OST-080 (and ...es in Dubs]



OST-080: With this head the client went big valves... and the new seats broke the head Huh Sad

[Image: AEU86 AE86 - (Catching up) OST-080 (and ...es in Dubs]

A replacement was found - $$

Even with the bigger valves - there still wasn't a lot of material removed do to the oversize bowl/seat diameter.

A finished chamber showing the big valves, and the multi-angle valve job.

[Image: AEU86 AE86 - (Catching up) OST-080 (and ...es in Dubs]


On the exhaust side there was some room in the port walls....

[Image: AEU86 AE86 - (Catching up) OST-080 (and ...es in Dubs]



On this one the client converted from factory EFI, to something a bit less fuel efficient.....

[Image: AEU86 AE86 - (Catching up) OST-080 (and ...es in Dubs]

Dan -

You can |Sad .... OR you can ask for help!!!

OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991
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(Catching up) OST-080 (and OST-074):Dan Dabbles in Dubs - oldeskewltoy - 06-13-2022 05:33 PM

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