looses power

[Frank Castros]

Originally Posted by Bob Mulry

426ci + 525 CFM don't = 7500 rpm at the end or 6500 rpm on the shifts..

Just sayin'


PS:
But I could be wrong......................

Please explain your thought.

[Myron Piatek]

Originally Posted by Frank Castros

Please explain your thought.

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.)

[Frank Castros]

Originally Posted by Myron Piatek

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.)

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.

[Myron Piatek]

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.

[Bob Mulry]

Originally Posted by Myron Piatek

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.

Be my guest.....

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..........

[Glenn Briglio]

Frank , has this combo been on an engine dyno? All the guessing and possibilities are answered.

[Frank Castros]

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.

[69Cobra]

1320/122=10.819 It sounds like he's right on target with the power he's making.

[Pvt Parts]

Originally Posted by 69Cobra

1320/122=10.819 It sounds like he's right on target with the power he's making.

There's always more!

[69Cobra]

Originally Posted by Frank Castros

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.

This is what I was going off of.