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Author Topic:   Lack of power coming out......
Drogo99
Dirt Maniac

Total posts: 120
posted June 07, 2004 06:26 AM  
350, 487 heads, small lift cam (maybe 480 or less), stock intake, Holley 750 cfm Model 3310 4 barrell with secondary metering plate added. (Vac secondary, per rules)

Just put the carb on this week and it seems like the car does not have as much power as it did before out of the corners with a 600 cfm Holley. Does fine down the straights. Could having too much jetting cause a situation like this? 72 fronts 76 rear.

Raz_900
Dirt Forum Champ
Total posts: 635
posted June 07, 2004 08:57 AM  
The jets could be right, but the spring and or accel. pump could be the prob.

I just bought a 3310S a couple weeks ago and even though the paper in the box says it should have a plain/silver spring, it was the black spring. Silver is about middle of open range (starts somewhere around 2500 I think and fully open at like 8000) and black is the strongest never fully opening. I switched the black for the purple (next softest to the silver) and it seems to work pretty well. I may even try the yellow one just to see if it bogs or works even better.

bob17
Dirt Roller

Total posts: 16
posted June 07, 2004 09:37 AM  
yeah try diff springs, when i was drag racing we had the same problem with my 360 mopar, we had to try 3 or 4 diff springs before i could get it right

monteregal7
Dirt Maniac

Total posts: 126
posted June 07, 2004 07:36 PM  
What RPM you pulling out of the corner? Maybe you need a lower gear?

Drogo99
Dirt Maniac

Total posts: 120
posted June 08, 2004 08:10 AM  
3/8 mile track hits 6200 @ end of straight running a 620 final. I never look @ the tach coming out of the corners (usually looking out for other cars)

It just seems like it takes the motor a while to wrap up....did not have the problem until this carb...

racerguy500
Dirt Maniac

Total posts: 168
posted June 08, 2004 11:06 AM  
Just sounds like too much carb for the engine? Smaller carb will help more than bigger in alot of cases, and it doesn't sound like you have a whole lot of engine. Just a thought, but also may want to verify you have the timing set as advanced as you should to help the bottom end.

Drogo99
Dirt Maniac

Total posts: 120
posted June 09, 2004 12:51 PM  
I agree about the size of the carb, but when I ran the Holley 1850 (600) I kept having problems with it loading up in the corners. I blamed it on the side hung floats.....

racerguy500
Dirt Maniac

Total posts: 168
posted June 09, 2004 11:17 PM  
Did you run the float bowl baffles? Had the same thing happen for weeks till we stumbled onto the fact we needed them.


Drogo99
Dirt Maniac

Total posts: 120
posted June 10, 2004 01:44 PM  
Float bowl baffles...??? Is it a Holley part?

racerguy500
Dirt Maniac

Total posts: 168
posted June 11, 2004 09:15 AM  
Pretty sure they was a Holley part but couldn't swear to it. They are little plastic scoop looking things tht go in the float bowl vents. Any carb shop should have them I would think. I think I paid a buck each for ours but they keep the fuel from sloshing in during cornering and causing flooding. There is a book on Holley carbs that has them in it, I'll see if I can find some more info on them. Good luck.

    

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