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Author Topic:   Modified motor selection?
sledgehammer
Dirt Maniac

Total posts: 101
posted November 28, 2005 05:35 PM  
What would be a good middle of the road motor for a modified? I am sure folks are spending more money than I care to think about but what will it take to be competative.

Thanks

CLBaker25
Dirt Freak

Total posts: 207
posted November 29, 2005 06:47 AM  
Everybody says a 355 with 12.5 compression, 6" rod and dart heads.

dirtbuster
Dirt Forum Champ
Total posts: 2012
posted November 29, 2005 07:34 AM  
Depends on where you race what is competitive or not. Ask around and try to find out what other guys are running. A good 355 may be more than enough some places but barely cut it at others. On the other hand a strong 406 may be the norm at some tracks but be way overpowered and actually be slower because of it at others. Yolu also have to keep in mind drivability if you race a dry dusty slick track you donít want a huge torque monster that you cant control because of the explosive torque, and if you run a heavy hooked up track you donít want something small and low on torque or youll get left behind off the corner.

A good 355 would be the minimum, 383 with good heads and bottom end will prob work better if you can use all the power without having to turn a ton of rpms due to the extra torque

sledgehammer
Dirt Maniac

Total posts: 101
posted November 29, 2005 04:15 PM  
What kind or RPM's should I shoot for?

J3
Dirt Freak

Total posts: 201
posted November 29, 2005 07:43 PM  
I would say your best option would be a FORD!

[This message has been edited by J3 (edited November 29, 2005).]

jhswords
Dirt Roller

Total posts: 9
posted November 30, 2005 06:12 PM  
quote:
Originally posted by sledgehammer:
What would be a good middle of the road motor for a modified? I am sure folks are spending more money than I care to think about but what will it take to be competative.

Thanks



i run a 355 12.5 to 1 dart heads 750 carb on a 3/8 and 1/3 plenty of power just use a real torque cam run around 6500 to 7000

Racer111
Dirt Freak

Total posts: 261
posted November 30, 2005 06:27 PM  
imca or ump ? If its UMP 372-406 around 600-650 hp.Small engine needs to turn around 8200-8500 RPM.406 8000 rpm

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