Posted By: deaks
Holley 950 HP Info - 08/29/09 12:53 PM
I've got a used Holley 950 HP on my 440 and i cant find any info as regards jet sizes, pump cams and power valves fitted when bought new. I've looked through holley's site and cant find any info.
Mick
Posted By: moparniac
Re: Holley 950 HP Info - 08/29/09 12:55 PM
Take the bowl off and see whats in there.... I just sold mine and it had 4.5 pv and 79/73 jets
Posted By: deaks
Re: Holley 950 HP Info - 08/29/09 12:59 PM
Is that what yours came with, there are 2 numbers on top 6 and 5 but they aren't next to each other, does that mean it's a 6.5.
Mick
Posted By: deaks
Re: Holley 950 HP Info - 08/29/09 03:18 PM
I've just pulled it apart and it's got 6.5 power valves back and front, 31 shooters, 82 prim jets and 84 mains, should i jet down to 78's again and work up from there.
Why do you suggest taking the pv's out?.
Mick
Posted By: 440Jim
Re: Holley 950 HP Info - 08/29/09 03:44 PM
I used to run a 950HP list 80496-1 and this is how it came:
78/78 jets
6.5/6.5 power valves
31/31 squirters
72/32 air bleeds
But I ran it without a power valve in the rear (plugged) and 78/86 jets. 35/37 squirters.
Posted By: deaks
Re: Holley 950 HP Info - 08/29/09 05:14 PM
Jim
Why did you take the pv out and what motor was this on.
Mick
Posted By: deaks
Re: Holley 950 HP Info - 08/29/09 07:24 PM
For the moment i've swapped the jets for 78 prim and 79 secs which is as near to stock that i can achieve with the jets i have available.
I'm taking the car out tomorrow, i'm also going to try unbolting my dynaflows and try the 3.5x18" collectors i've got.
Mick
Posted By: ITSDUSTA416
Re: Holley 950 HP Info - 08/29/09 09:37 PM
My 950hp came 78prim and 79sec I removed the power valve in the rear and jetted up to 87's with jet extensions.
If your car leaves the line fast the gas will rush to the back of the fuel bowl and the fuel will not flow through the power valve.