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#1
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ACC PUMP CHANGE?
Currently have 30cc front and rear. would I gain anything 60ft wise if I switched to 50cc on the front? 850xp carb and footbraking to 2000rpm launch.
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69 Firebird 472, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 10.90 @123 |
#2
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Try it, you have nothing to loose but 60 foot time and having black smoke coming out from under the car when the green comes on.
If your not sensing a hesitation now then I kinda think you don’t need such.
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I do stuff for reasons. |
#3
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Try the swap, front pump to rear, etc (and the related hardware) and let the car tell you if it is a benefit. DATA vs opinions.
Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
The Following User Says Thank You to Tom Vaught For This Useful Post: | ||
#4
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I can not imagine it will hurt. Strong running 455s do not have bog in them from my experience. Ran a 850 for years with duel 50ccs and it just sucked it up wanting more.
IMO 30cc front and rear with a engine like that is not giving the engine what it wants. You might not gain anything but the engine will not bog, you can take that to the bank. |
#5
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Thanks. It doesn't bog or hesitate just wondered if it would help any. I have bought the kit so will try it.
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69 Firebird 472, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 10.90 @123 |
#6
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I would do a back to back test at the track, same day, same conditions. The beauty of a Holley carburetor is 8 screws and you have your answer!.
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#7
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You have to remove a couple of "C-clips" too Mike and also the swap/readjust the Pump Cams. You do not want the pump diaphragms to ever run out of travel and rip.
Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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