Finally got a dyno done on motor - Vintage Mustang Forums
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post #1 of 16 (permalink) Old 05-08-2019, 11:09 PM Thread Starter
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Finally got a dyno done on motor

Finally got the motor put together after getting it back from the shop and took it back over to get a dyno. Took the orig 289 over a while back and he set it up to be a 331 stroker. Finally got it back in with him to get the dyno. After running 9 different set ups on it using various carb risers and breathers was able to get about 325 horsepower with the original iron heads with about 330 torque.

https://drive.google.com/open?id=1kY...TJ2MSwbcYEJxDm

https://drive.google.com/open?id=1V8...8psR4YFPkPBvKG

https://drive.google.com/open?id=1ZV...LB7ojGXrhrqn74
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post #2 of 16 (permalink) Old 05-08-2019, 11:20 PM
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Nice! Looks like a solid street motor. Sounds great too!

Tom

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post #3 of 16 (permalink) Old 05-08-2019, 11:28 PM
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seems to peak pretty early ,no? I'd hope to get to at least 6k with it


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post #4 of 16 (permalink) Old 05-09-2019, 01:37 AM
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What a beaut Can you share more about the build? What kind of cam? What work to the heads?

NICE
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post #5 of 16 (permalink) Old 05-09-2019, 02:41 AM
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Nicely done! Impressive results for a stock head motor. What modifications were done?
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post #6 of 16 (permalink) Old 05-09-2019, 02:54 AM
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The beauty of that engine is that if down the road you want or need more, there's roughly another 100hp available from a cam and heads.

65 coupe 5.0L/5 speed
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post #7 of 16 (permalink) Old 05-09-2019, 06:35 AM
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You can probably add about 5% to those Dynomite dyno numbers, they are usually pretty conservative when compared to other dynos.

John

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post #8 of 16 (permalink) Old 05-09-2019, 08:48 AM
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that's a nice torque curve, should be a fun ride. what's the build consist of?

66 mustang coupe, 302 / T5-Z / 3.80 trac-lok


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post #9 of 16 (permalink) Old 05-09-2019, 09:14 AM
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Quote:
Originally Posted by 2nd 66 View Post
seems to peak pretty early ,no? I'd hope to get to at least 6k with it
6K with stock heads on a 331? No way.....
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post #10 of 16 (permalink) Old 05-09-2019, 09:25 AM
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Looks great! I bet you are very happy with those numbers.

1965 C-code Coupe - 289 w/ C4. 9" w/ 3.25 LSD, 4 wheel Street or Track discs, GT350 coils w/ Arning drop, 4.5" mideyes, Cal-Tracs.
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post #11 of 16 (permalink) Old 05-09-2019, 09:36 AM
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I'll be happy with 275 from my GT40P.
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post #12 of 16 (permalink) Old 05-09-2019, 10:48 AM
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Great stuff, sounds brilliant too! Bet you’re stoked.
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post #13 of 16 (permalink) Old 05-09-2019, 11:59 AM
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nicely done!!
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post #14 of 16 (permalink) Old 05-13-2019, 08:50 AM
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Very solid numbers and nice torque curve on it. Nothing to complain about there.

Coyote build in 65 GT Fastback in body work https://forums.vintage-mustang.com/b...e-powered.html and on Facebook @65gtmustang
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post #15 of 16 (permalink) Old 05-13-2019, 03:16 PM
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Any reasons for sticking with the stock heads? Regardless, those are great numbers.

1969 Convertible field find (450hp spaghetti noodle)
1968 Fastback (428 and a 4 speed)
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-Armon

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