347 dyno - Page 2 - Ford Muscle Forums : Ford Muscle Cars Tech Forum
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post #16 of 21 (permalink) Old 09-18-2015, 05:14 AM
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Re: 347 dyno

What was the temperature like on the day you dynode it? Also what transmission are you running? Like Iowan said your trap speed and weight suggest you have lost some power compared to your dyno results at the crank. Could be you dynoed in cooler weather, could be trans is inefficient (C-6) or something else. If you can find the lost power it seems you have enough power to meet your goals.

1965 mustang coupe. 306, home ported 180cc heads, funnel web, 10:4 compression, t5z, 4.62 gears in a locker
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post #17 of 21 (permalink) Old 09-18-2015, 08:24 AM
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Re: 347 dyno

Also are the headers you are running in the truck the same as what was used on the dyno? Could be some lost power there.


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post #18 of 21 (permalink) Old 09-18-2015, 12:27 PM
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Re: 347 dyno

It's not hard to lose 30 hp. with a set of headers, just go from 1 3/4 to 1 5/8 or dyno headers to chassis headers.

Iowan
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post #19 of 21 (permalink) Old 09-19-2015, 08:41 AM
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Re: 347 dyno

NEEDS shifted at 7k
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post #20 of 21 (permalink) Old 09-20-2015, 08:56 AM Thread Starter
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Re: 347 dyno

went to the track Friday and it did a faster time [email protected] mph but the tail shaft housing broke at the end of the pass. I'm going to look at it and see what the problem is and fix it. then sell the truck.
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post #21 of 21 (permalink) Old 10-25-2015, 09:05 PM Thread Starter
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Re: 347 dyno

on the dyno it had 1 5/8 long tube headers, I have 1 3/4 mid length headers.
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