Speier Racing Heads v7721/15º Small Block Ford

Cylinder Head and Manifold Discussion

Speier Racing Heads v7721/15º Small Block Ford

Postby Chad Speier » Mon May 28, 2012 12:38 pm

It's done and ready..

More info and pricing: http://www.speierracingheads.com/SRHv7721.htm

2.180/1.600 valve
4.155 fixture
wood radius plate
2" exhaust pipe
50º seats

290cc
58cc chamber (out of machine can go as low as 44cc)
3.03in² MIN CSA (seat ring)
3.15in² pinch
290fps through pinch dead center
floor speed.. well it's perfect!

REV stainless valves (shelf style, custom titanium will help curve!)
32.5º backcut

.200 151/111
.300 229/164
.400 285/207
.500 337/237
.600 367/255
.700 375/266
.800 386/272
.900 389/275
1.00 393/278
1.10 395/280

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Chad Speier
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Re: Speier Racing Heads v7721/15º Small Block Ford

Postby MELWAY » Tue Jun 26, 2012 9:16 pm

Any dyno data from these heads yet Chad??
3370lb 4 door sedan 9.89@136
358 chev cast heads N/A
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Re: Speier Racing Heads v7721/15º Small Block Ford

Postby Chad Speier » Sat Jul 07, 2012 9:00 am

MELWAY wrote:Any dyno data from these heads yet Chad??



He is close but not yet.
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Re: Speier Racing Heads v7721/15º Small Block Ford

Postby BirdMan » Sun Mar 02, 2014 5:32 pm

If these were for my friend near Topeka he dynoed around 700 fhp and in a Heavy 65 Mustang C4, very high stall converter he ran a 9.83@130 something. With a 15 mph head wind he ran some high 9.90's! Sounded good revving to 8,500 rpm's. Sweet!!

Dale C.

p.s. I have a set of these flowing slightly less on a 412W running flat out 9.79@135 against that same headwind in a 64 Falcon weighing 3060 w/driver.

These heads are good inline valve head, my cc'd at 49 while stock ones are supposed to be 48cc. Chad posted 58cc's!!!! um!
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Re: Speier Racing Heads v7721/15º Small Block Ford

Postby Chad Speier » Sun Mar 02, 2014 6:26 pm

Actually Lynn's heads were ported by hand. Runs well!!
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