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 lack of power on Dyno

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seany-boy
Mach1 Veteran
seany-boy


Number of posts : 158
Age : 63
Your location : Australia
Registration date : 2008-07-28

lack of power on Dyno Empty
PostSubject: lack of power on Dyno   lack of power on Dyno EmptySun 7 Mar - 7:04

Hi ,

I ran the car on a brief dyno run in the weekend and the results seemed a little disappointing. The car is a 351C-4V, rebuilt basically stock with 30 thou oversize and a mild summit 5201 cam. Has 750 holley DP and is a C6 auto now. (was manual). Stock exhaust and inlet manifolds. Exhaust is pretty crappy but I have not changed it as I am going to return to a manual at some stage. Mallory unilte with electronic ponts but no vac advance. Not sure of timing and fuel mix seems ok on dyno.
The guy said he was not surprised old car etc, but the rebuild seems to have been done reasonably well.

any thoughts?

sean
lack of power on Dyno Dyno_r11
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booah
Mach1 Member



Number of posts : 10
Your location : W.A. Australia
Registration date : 2009-02-15

lack of power on Dyno Empty
PostSubject: Re: lack of power on Dyno   lack of power on Dyno EmptyTue 9 Mar - 8:05

Hi Sean

Am I reading the rpm correct, nothing over 3000rpm?

regards

Denton
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seany-boy
Mach1 Veteran
seany-boy


Number of posts : 158
Age : 63
Your location : Australia
Registration date : 2008-07-28

lack of power on Dyno Empty
PostSubject: Re: lack of power on Dyno   lack of power on Dyno EmptyTue 9 Mar - 13:28

Hi Denton,

I think they are just incorrect, it seems to have been mapped against KPH. When I run a calculator on the speed, diff ratio and tyre size in top gear then I get 3900 at 150KPH and 2800 at 116KPH which are the peak torque and HP measurements.
So I ignored the rev numbers but was concerned about the HP numbers- assuming they are correct. Wondering if slightly retarded timnig would have a big impact?

Cheers

Sean
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PostSubject: Re: lack of power on Dyno   lack of power on Dyno Empty

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