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Author Topic:   305 block, 3.75 stroke does it work?
Dirt Newbie

Total posts: 1
posted December 07, 2005 08:42 PM  
thinking about building one of these, what kind of power does it make or should I scratch this thought?

Dirt Forum Champ
Total posts: 723
posted December 08, 2005 04:40 AM  
I built one of those once, for a customer who wanted it and supplied the was for a 'pure' stock class here and it actually ran pretty good, it is a 334 cid. KB piston makes that piston.

Dirt Freak

Total posts: 426
posted December 08, 2005 07:53 AM  
the small bore size will limit breathing capabilities at race speeds.

Dirt Full Roller

Total posts: 61
posted December 08, 2005 02:46 PM  
305 is junk

Ego Racing
Dirt Forum Champ
Total posts: 767
posted December 08, 2005 04:16 PM  
I don't know about junk, I have seen a 500hp 305ci motor. Itdid have dual 4's and some other stuff but the guy drove it on the street.

Dirt Full Roller

Total posts: 60
posted December 08, 2005 06:11 PM  
I have one in my truck, gets great mileage and still has plenty of power to pull a trailer, but I dont turn it over 4500 rpm.

I agree with leapinlizard, "the small bore size will limit breathing capabilities at race speeds"

unless you are building it to fit a CID rule, or unless you are trying to cheat in a 305 class.....I wouldn't recommend this combo for a race engine. The same money would make more power with a different combo.

now if you want a great combo for your pickup truck that has the torque to pull the racecar trailer and still get decent mileage, I say "go for it!"

Mark's Racing Engines

[This message has been edited by engineman (edited December 08, 2005).]

Dirt Maniac

Total posts: 168
posted December 11, 2005 05:42 PM  
we built a 3x4 we put a 4" stroke crank in a 305 wiht h-beam rods of course we hit water in the block but just welded it up the owner of the motor loved it, so yes a 3.75 is possible

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