1986 Ford Mustang SVO-ND Part Deux
OK, back to engine stuff. So, you've heard about the
modifications to the B234F cylinder head on TurboFord.org or the other groups out there.
You still don't know what it looks like. Well, here you go.
Notice the aluminum block at the bottom of the pic. There is
a 1/4" NPT hole for the oil pressure gauge. The oil passages
are internal on this head. No external oil feed lines on this
On the opposite side, Mike also prepared an oil feed hole. This
one will go to the turbocharger. This will keep things a little
neater in the engine bay.
At the front of the head, the original water pump passage was
milled off, and welded shut.
I used one piece, top quality, Racing Engine Valves (REV). They
were pricey, and took quite a while to arrive. However, I feel
confident that I will probably not drop the head of one of these
in my expensive engine.
This is what the completed bottom side looks like.
We used 'beehive' springs from a Ford 4.6L DOHC engine. These
are stock springs. There is slightly less spring pressure with
these over the stock Volvo springs. I don't plan on spinning
this engine any faster than 7000rpm, so I think it will be OK.
This pistons were made by Diamond. They already had
the profile of the piston top on file. I wanted a slightly larger
dish than they had specified. Using the nominal chamber volume
of the B234F head of 53cc, I had them designed with a large enough
dish for a static compression ratio of around 8.1:1. Knowing
the head would be milled, I was looking for a max SCR of 8.3:1.
I has the pin moved to allow for the 2.5L and a 5.500"
connecting rod. Also, we set up the ring lands to accept a standard
Buick 3.8L ring package.
Once assembled into the short block, this was the
Beautiful, isn't it? :)
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