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dyno numbers on my new motor

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rmcomprandy
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Post  jesse July 17th 2011, 8:47 pm

i did a new motor this year
i had line's performance do the mach and assy
but i am not impressed with the hp numbers

motor
svo block
4.150 stroke
4.500 bore
cam-pistons i had lem do his thing
upgrated to bigger crower lifters
heads are tfs a460
cnc ported from shannons
no flow sheets i bought the heads used
but the guy i got them from said he think they flowed 460 int
qft 1250 dommy carb
comp is 14-1

i hoped to get close to 900+ i have heard his dyno is not a happy one
but 790 off this combo?
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Post  schmitty July 17th 2011, 9:03 pm

Is this a corrected #?
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Post  jesse July 17th 2011, 9:06 pm

?
on the dts dyno it made 790@7400
still waiting on dyno sheets to be sent
i wasnt there when it was dynoed

am i expecting to much when i say 900 hp?
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Post  schmitty July 17th 2011, 9:14 pm

I don't know Jesse, that seems a little low compared to some of the other stuff done with the A heads. If the dyno is notoriously low, that would seem to indicate that there is more there than what is being printed on the sheets. When I did my first engine down at Bret Powell's shop he told me that his dyno was always on the short side, and let the customer know that they came to the wrong shop if they were after "bragging" numbers. I would run it and see how it compares to other stuff you pull against before being to judgemental. Cool
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Post  jesse July 17th 2011, 9:19 pm

i hear ya and i have been struggling with fuel pump issues
so i have got a good run on it yet
well see once i get a good run on it
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Post  res0rli9 July 18th 2011, 12:47 am

This is a little more ci. but its pump gas build 10.1
http://www.460ford.com/forum/showthread.php?t=154618

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Post  Dave Maxwell July 18th 2011, 2:12 am

didn't Seth have a pump gas 557 a couple yeas ago that hit mid 800's? I'm hoping for 900 with 588 going by his set up and numbers. Pump gas also.

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Post  res0rli9 July 18th 2011, 2:33 am

Dave Maxwell wrote:didn't Seth have a pump gas 557 a couple yeas ago that hit mid 800's? I'm hoping for 900 with 588 going by his set up and numbers. Pump gas also.

Yes its about 2/3s down the page I posted. Cool

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Post  Dave Maxwell July 18th 2011, 8:15 am

thank you res

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Post  rmcomprandy July 18th 2011, 10:47 am

Dave Maxwell wrote:thank you res

14/1 compression is not anywhere near "pump gas" friendly.

Just put on a dyno and run to check for power that engine is making, is certainly understandable. I have routinely seen a 100 horsepower tuned into a combination on the dyno when being tuned correctly.

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Post  schmitty July 18th 2011, 12:36 pm

rmcomprandy wrote:Just put on a dyno and run to check for power that engine is making, is certainly understandable. I have routinely seen a 100 horsepower tuned into a combination on the dyno when being tuned correctly.

If I remember correctly on mine, you tuned about 75hp or so on it before we couldn't find any more.
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Post  Dave Maxwell July 18th 2011, 2:45 pm

no 14 to 1 isn't. I was just pointing out what had been done on pump gas. Seth had 11 to 1

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Post  Copperhead July 18th 2011, 3:07 pm

Dave Maxwell wrote:didn't Seth have a pump gas 557 a couple yeas ago that hit mid 800's?

Yep,......

It's in my truck. Wink

At Seth's dyno session it made 838hp @6300 / 776tq @4800.

Spec'd out to 10.8 to 1 after the calculations were done.

The engine has since been gone through by Bob "Jet Boat" Hardison. No changes were really made other than bumping up the cam timing. Box stock A460 heads w/ the smaller 2.30 valves, Old school TFS single plane, low rise intake,& 1250 Pro-Systems carb. I didn't dyno it after the rebuild, but I'm thinking/estimating the adjustment was worth 10-12hp.

Ran it @ RT 66 Raceway a few weeks ago and my truck turned it's best time,..... 9.86 @136.5. Weighs 3600 w/ me in it.





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Post  dfree383 July 18th 2011, 4:04 pm

My 528" A460 headed motor @ 12:1 made 905 on Mike Phillips Dyno.
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Post  rmcomprandy July 18th 2011, 4:23 pm

dfree383 wrote:My 528" A460 headed motor @ 12:1 made 905 on Mike Phillips Dyno.

The "pre-tuned" runs were considerably less, lol.

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Post  dfree383 July 18th 2011, 4:32 pm

rmcomprandy wrote:
dfree383 wrote:My 528" A460 headed motor @ 12:1 made 905 on Mike Phillips Dyno.

The "pre-tuned" runs were considerably less, lol.

Not a bunch less, but yes we did find a decent amount of power on the dyno getting everything right.
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Post  cool40 July 18th 2011, 10:57 pm

i sure would'nt let it get me down.i started out with my 526 5yr ago,no dyno,and now have it almost where i think it should be.it's been a lota tnt at the track and help from a bunch of good folks on here.i've learned a lot this way but most of all i learned i'll dyno the next one.lol.
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Post  A70maverick July 19th 2011, 10:45 pm

Did Lance tune it at all, or just get you a baseline number? One thing for sure, if he built it it is done right. I'm sure that his dyno is on the low side. I know Jason has there's at KB set up tough too. How much torque?

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Post  jesse July 20th 2011, 2:10 am

lance did it all
i told him to do what he wanted and do a cam if he thought it would help
well he used my old cam and that cam was good for what the motor was befor
i updated the top end but anyhow
i still havent got the dyno sheets when i picked the motor up lance
was at a nhra event with jason
lance was super busy with jason and nhra
and that was cool but i felt it took time away from my build
motor was 2 months late on getting done and i am kinda disapointed about the service
but as far as his work it is top notch and a great guy i will continue to use him but i hope
next time around he takes the time and dose what he says he is gonna do
so i felt he could have got more power out of my motor
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