Ive only had mine in for 2 months but no problems.
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JE 13:1 Piston / 440 Bore
Edelbrock 38MM "Doug Eichner" Carburetor
Web Hardweld Rocker Arms
Web Cams 479 Grind - Lift = .378, Duration = 274 Degrees
Web Performance Valve Springs
Web Shortened Valve Guides
LTE Dual Exhaust
Waiting for my ACE Large Capacity Oil Cooler

 

My 440ex had 5-6 races on it than it blow a head gasket but that was because one of the head bolts came lose. Put got it fix in it is running very good.


ironrod how do you like your Edelbrock 38MM crab. My has a liitle problem with the accelerator pump sticking.

 

I havent had any problem at all. Its the smothest power I've ever had in a quad.

 

Ironrod, how well does your 440EX run? Can you outrun stock DS's or slightly modded?.... Let me know cuz I know a 440 can be built and go slower than hell or if built right can kick some serious a$$.

 

Hey man!

Well, I havent gone against any of the quads yet. When the weather gets better, I'll be getting some guys to run my EX for a drag or two. I've mentioned this before, but Chuck, a good friend who is also a motor builder, ran it and his words were that it pulled like a 686 Raptor. I simply can't believe the power. I was so happy I went out and purchased new plastic and a bunch of new billet parts for it!

I think if a guy were to follow what I did, he couldnt go wrong. That 13:1 JE piston is amazing. Its nice cuz I run the same race gas now as the DS with the 14:1 in it. Sometime in the future I'll have to dyno it.

Marky