Thread: heads

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you could buy a set of dart 49cc heads, I'm not shure of your current compression but 305 heads are 58cc, so the dart 49cc heads would bump your compression ( more power ) and be better flowing ( more power ), there not that expensive ither. you may have to run premium due to higher comp tho

Originally Posted by Matt167

you could buy a set of dart 49cc heads, I'm not shure of your current compression but 305 heads are 58cc, so the dart 49cc heads would bump your compression ( more power ) and be better flowing ( more power ), there not that expensive ither. you may have to run premium due to higher comp tho

The 49 cc heads you a refering to have a port volume of 180 cc.This is way to much cylinder head for a stock 305 engine and even if he builds a 334 they might still be on the big side.

Whoever gave you the 441/993 suggestion probably has a set they want to sell. Those are 76cc heads and will put your compression soooo low.

Originally Posted by MI2600

Whoever gave you the 441/993 suggestion probably has a set they want to sell. Those are 76cc heads and will put your compression soooo low.

I was the person who made this post.
If you go back and read his posts he has talked about building just about everything.
The reason for the 441/993 post was the 305 heads are much more prone to cracks than the 441/993 and on a 334 which he talked about building they will work fine with a flat-top piston.