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10-25-2014, 09:56 AM | #1 |
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looses power
GT/HA '66 Plymouth Belvedere, 426 Street Wedge, 3,675 lbs.
2.77 first gear ratio, 4.89 rear gear, shifting @ 6,500 rpm, 7,500 rpm at the finish line. 1.44 60', 4.35 @ 330, 10.80 @ 122.00 mph. Problem is it runs out of steam at the top of the first gear. Running an Edelbrock Super Victor with a Carter AFB 585 cfm, fresh Product Engineering 9500 Fuel Pump and 4 port regulator. What do you guys think? |
10-25-2014, 01:37 PM | #2 | |
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Re: looses power
Quote:
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10-25-2014, 03:09 PM | #3 |
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Re: looses power
Try shifting 1-2 at 6000-6200 see if it goes faster.
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Lee Valentine 1661 STK |
10-25-2014, 04:19 PM | #4 |
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Re: looses power
I was thinking the same thing. I always have to get out of low gear much sooner than second.
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Ed Wright 4156 SS/JA |
10-25-2014, 04:35 PM | #5 |
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Re: looses power
Just to be on the safe side, if clearances and other factors allow it, try upping spring pressures a bit. It's better to have a LITTLE more than needed than a little less. Do some research on what your overall engine combo should like in springs.
Being a long stroke big block, it could work better with less rpm, as suggested.
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LOCOMOTION Racing |
10-25-2014, 08:36 PM | #6 |
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Re: looses power
Okay, I'm good with lower rpm, but I'm thinking the intake has too much plenum and runner, agree?
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10-25-2014, 08:58 PM | #7 |
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Re: looses power
Too much plenum or runner cross section won't cost power at higher RPM. My experience has been the other way around.
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Ed Wright 4156 SS/JA |
10-26-2014, 12:07 AM | #8 |
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Re: looses power
426ci + 525 CFM don't = 7500 rpm at the end or 6500 rpm on the shifts..
Just sayin' PS: But I could be wrong......................
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Bob Mulry 7516 STK A & M Motorsports |
10-26-2014, 07:37 AM | #9 |
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Re: looses power
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10-26-2014, 07:50 AM | #10 |
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Re: looses power
If I may.....Try breathing through a straw (small carb), then try breathing through the cardboard spool out of a paper towel roll (big carb). You can only take in so much air in so much time through a small hole. The restriction doesn't allow you (or the engine) to breathe enough volume quickly enough to satisfy the needs. (High rpm or you running.)
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