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Cars > Slycrew_Racing’s Garage > Blog > 1991 Ford Thunderbird (Supercoupe) > progress on Split port heads


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M –50
Milford, Michigan
United States


Slycrew_Racing’s Blog Posts 1 – 4 of 4

progress on Split port heads
Sat Aug 2, 2008  |  1 comment
Tue Nov 27, 2007  |  comment
More tuning
Mon Feb 5, 2007  |  comment
Current status
Sun Jan 7, 2007  |  comment

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progress on Split port heads

By Slycrew_Racing

Filed under: 1991 Ford Thunderbird (Supercoupe)

I have my titanium valves ready and had new seats put in my new 99+ split port head castings and cut to my titanium valves. I'm going with 1.55 ex, 1.88" intake. Dave Dalke did an excellent job with the radius + many angle valve job and put a near mirror finish on the sealing surface.

I had an extra casting that I ported one cylinder on before I sent it to him, then he ported one cylinder the way he thought was best and flowed them. He beat my numbers on the flow bench by a few cfm. His cylinder was flowing 235 cfm intake and 199 exhaust. Last night I went to his place to pick up the heads and we started experimenting a little more with the intakes. After about 4 progressively aggressive port configurations, we ended up at 245 cfm on the intake with the 1.88" valve. I'm pretty happy with that. Now if I can duplicate that port job on the new castings, I'll be in pretty good shape.

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supercoupe91’s Profile Photo
Mar 6, 2009 at 12:16 pm
hey i have a 91 supercoupe and ive looked everywhere for titanium valves. cant find em where can i get a set and about how much

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Cars > Slycrew_Racing’s Garage > Blog > 1991 Ford Thunderbird (Supercoupe) > progress on Split port heads

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