Any performance gain when you square jet?
#350890
06/18/09 11:29 AM
06/18/09 11:29 AM
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Joined: Dec 2006
Posts: 1,178
Indy
FlyFish
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super stock
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OP
super stock
Joined: Dec 2006
Posts: 1,178
Indy
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I have a Holley 750 dp with the Proform main body with 82/92 jets and a 6.5 pv. I was just wondering if there was a performance gain/advantage to square jetting and plugging the pv or just leaving it alone. This is on a 410 SB stroker that is mostly used for racing, limited street driving (and yes, I know this combo wants a bigger carb, but that will have to wait till next year).
67 Barracuda street car, 408, e85, 1.38 60', 6.44 @105.9 in the 1/8 mile, 10.19 @130.5 in the 1/4...so far....
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Re: Any performance gain when you square jet?
[Re: Dodgem]
#350892
06/18/09 11:49 AM
06/18/09 11:49 AM
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Joined: Dec 2006
Posts: 1,178
Indy
FlyFish
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super stock
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Well, I just started tuning this motor (new motor, just a few weeks old), but when I went from the tune that my 360 liked (78/88) up 2 sizes (80/90) I picked up 1.5 MPH...So I bumped it up again and it picked up just a little more (.2 mph I think...I'll have to look it up). I thought it sounded like to much jet as well, but the MPH and the plugs tell me different. 
67 Barracuda street car, 408, e85, 1.38 60', 6.44 @105.9 in the 1/8 mile, 10.19 @130.5 in the 1/4...so far....
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Re: Any performance gain when you square jet?
[Re: FlyFish]
#350894
06/18/09 11:54 AM
06/18/09 11:54 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
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Master
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Posts: 52,972
Romeo MI
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Quote:
I have a Holley 750 dp with the Proform main body with 82/92 jets and a 6.5 pv. I was just wondering if there was a performance gain/advantage to square jetting and plugging the pv or just leaving it alone. This is on a 410 SB stroker that is mostly used for racing, limited street driving (and yes, I know this combo wants a bigger carb, but that will have to wait till next year).
To me its not a performance thing with the PV, I dont
use because its a consistency thing... if it were
slow to open it would be a bog and thats a loss.
For a street car it doesnt matyter that much if it
were a touch slow on opening..... JMO
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