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10-26-2014, 08:01 AM | #11 | |
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Re: looses power
Quote:
Thanks Myron, I agree about lower shifts points, but I still suspect the Super Victor intake manifold is the wrong choice, and going to test a Victor which is designed for lower rpm applications. |
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10-26-2014, 08:46 AM | #12 |
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Re: looses power
Just trying to help with my perspective, and hoping Mr. Mulry doesn't mind me cutting in.
The manifold change appears to be a very good idea also. I've heard of several people disappointed with the small block version of the SV as well, noting the larger plenum volume and recommended rpm range.
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LOCOMOTION Racing |
10-26-2014, 03:04 PM | #13 | |
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Re: looses power
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You broke it down better than I did......... Take care, Bob PS: But on the other hand, a large plenum and a small runner can fool the engine into thinking that it has a larger carb.. There are a lot of ways to fool an engine..........
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Bob Mulry 7516 STK A & M Motorsports Last edited by Bob Mulry; 10-26-2014 at 03:09 PM. Reason: PS |
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10-26-2014, 08:02 PM | #14 | |
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Re: looses power
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Don't go to 4.56 and 2.45 low gear. It won't leave starting line at all. |
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10-26-2014, 11:10 PM | #15 |
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Re: looses power
I would agree that a large runner and plenum wouldn't cause a lack of power. Sprint cup restrictor plate motors (similar to the big motor, small carb setup) actually make power using the biggest runner size they can cut into the manifold casting. More likely a fuel delivery issue if it only occurs in low gear as that is when there is the highest 'G' loading on the fuel system.
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10-27-2014, 12:17 PM | #16 |
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Re: looses power
Frank , has this combo been on an engine dyno? All the guessing and possibilities are answered.
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10-27-2014, 07:29 PM | #17 |
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Re: looses power
Thanks Glenn,
This is not my car, but a friends who is not a Class Racer member and cannot post here. It was my idea to post because he's is frustrated and I knew you guys could help. I know the engine has been dyno tested, but not flogged and I'm not familiar with the data. Because of the small carburetor I think the Super Victor intake is too much, and he's going to try the smaller Victor at the track. The fuel delivery theory has been adequately addressed, and I agree the 2.77 low gear and 4.89 rear are correct for the combination, also shifting at 6,000 seems to make sense. Thanks to everyone for the thoughts, but if there are more ideas, I'm all ears. He's only looking to go 10.40s or 50s. |
10-27-2014, 07:58 PM | #18 |
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Re: looses power
1320/122=10.819 It sounds like he's right on target with the power he's making.
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Kris Rachford 69 Cobra 428CJ 4 Speed C/S 3032 |
10-27-2014, 08:59 PM | #19 |
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Re: looses power
There's always more!
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10-27-2014, 10:01 PM | #20 |
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Re: looses power
Yes. But there's not 3 or 4 tenths more with the same hp to run 122mph.
Just curious does anybody have good data on what it takes hp wise to pick up 1 tenth at this level?
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Kris Rachford 69 Cobra 428CJ 4 Speed C/S 3032 Last edited by 69Cobra; 10-27-2014 at 10:04 PM. |
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