Old School FMS A-Headed 557

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Post  snuff98 on March 13th 2017, 2:50 pm

Just a few stats on new combination.
Car: 1985 T-Bird Alston round tube chassis, mild steel, ladder bar.
Weight:2752lbs
Gear: 4:88
Tires: Hoosier 32x13.5 rear  26x4.5 front
Trans: ATI Powerglide 1.80 straight cut
Stall:  BTE 5700  Spragless
Engine:  1986 FMS A-Heads,  A460 block, Lunnati 4.5 crank, JE flat top pistons, Cam Motion cam "very small"
            Ron's toilet 4.100

1.16 sixty foot 5.33 @ 130 mph

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Post  windsor on March 13th 2017, 2:55 pm

Nice. How small is "very small"? And compression?
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Post  snuff98 on March 13th 2017, 2:57 pm

274 @.050 .745 lift 14.2 to 1

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Post  windsor on March 13th 2017, 3:01 pm

Nice! That is pretty small.
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Post  NITROUS FORD on March 13th 2017, 8:14 pm

what size valves, and is any porting done to them Shocked

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Post  snuff98 on March 14th 2017, 8:06 am

2.35 intake 1.90 exhaust. Lots of port work. These heads are ancient, I bought them from a member here. They were supposed to be 83 cc chambers but they were actually 60 cc chambers with o-ring grooves in the heads. This guy either didn't know what he was selling or he lied. After having to get all the guides replaced and some creative valve and seat work I milled out the o-ring groove and ended up with 64 cc chambers. The engine now has .070 cometic gaskets on it also.

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Post  99zx9r on March 16th 2017, 11:42 pm

Nice time. I ran a similar setup in my '86 last year...557 D0VE block with 4 bolt conversion, ported FMS A heads, little bigger cam (.760) but lower CR (12:1), glide and 4.10s. I was running it in Super Gas, but on one test pass the throttle stop malfunctioned and came on for just a split second instead of the typical 2.8 seconds. Car ran 8.34 @ 163 (5.35 @ 132 8th). 60ft was only 1.25 but that's due to the throttle stop coming on at the hit.
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Post  snuff98 on March 17th 2017, 12:32 pm

what does you car weigh?

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Post  99zx9r on March 17th 2017, 3:26 pm

Quite a bit lighter than yours...2465 race weight (2265 no driver). Alston 4 link car, mild steel.
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Post  snuff98 on March 17th 2017, 3:46 pm

almost 300lbs difference.  That makes me feel a little better about my combo.  I wish there was an easy way to shed some of that 300 lbs but it's not happening.

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