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Author Topic:   DART 49CC HEAD
jtno6
Dirt Forum Racer

Total posts: 87
posted May 13, 2005 02:55 PM  
WHAT DOES EVERYONE THINK OF THE NEW DART 49 CC HEAD (220 )

HERNDON
Dirt Full Roller

Total posts: 73
posted May 14, 2005 08:50 AM  
Waste of money!!! You can't run domes, so you're stuck with limited compression. 12:1 with 6" rod 355 flat top wiseco ultralight. Plus the clearance for the push rods is almost non-existant. I wish I would have just done some work to the Pro Action 64cc I have in the corner of the shop....

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted May 14, 2005 10:13 AM  
our flattop 406 with 49cc heads has about 14-1 compression and have had no troubles (at least last year, and the eguy that bought it hasn't had problems with it this year)

seabiscuit
Dirt Roller

Total posts: 15
posted May 14, 2005 09:04 PM  
I have two sets of these heads,don't buy them if you want to run a very big cam, the valves sit above the surface of the head so you lose a lot of piston to valve clearance, about .560 max lift depending on pistons and cam duration, I had a set of probe pistons in a 377 than we had to flycut to get that big a cam in. The early ones have pushrod clearance problems the last set I bought are machined for more clearance but its real close.

seabiscuit
Dirt Roller

Total posts: 15
posted May 14, 2005 09:05 PM  
I have two sets of these heads,don't buy them if you want to run a very big cam, the valves sit above the surface of the head so you lose a lot of piston to valve clearance, about .560 max lift depending on pistons and cam duration, I had a set of probe pistons in a 377 than we had to flycut to get that big a cam in. The early ones have pushrod clearance problems the last set I bought are machined for more clearance but its real close.

jtno6
Dirt Forum Racer

Total posts: 87
posted May 15, 2005 08:04 AM  
tanks i think ill stay a way from these heads

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