diffrences between 440 a and b

kansasen · Post by **kansasen** » Sat Feb 02, 2008 8:27 pm

did they just change the heads for more compression and more agresive jetting to get more h/p on the sportfires than on the trails

Liquifire84 · Post by **Liquifire84** » Sat Feb 02, 2008 9:15 pm

There is more to it than that. The bottom end is where all the differences are at. The sport has a beefier crank than the trail.

Brice

kansasen · Post by **kansasen** » Sat Feb 02, 2008 10:57 pm

what if you put the B model heads on an A

Liquifire84 · Post by **Liquifire84** » Sat Feb 02, 2008 11:46 pm

You wont get any thing from it.

Brice

kansasen · Post by **kansasen** » Sat Feb 02, 2008 11:57 pm

Then where do they get the extra H/P from cause a beefer crank isnt going to make mere power heavier crank will give more ineritia there has to be more compression or more flow in the engine the pipes and the intakes look the same and the same size carb

Liquifire84 · Post by **Liquifire84** » Sun Feb 03, 2008 12:06 am

The cyclinders are differnt than the trails.

Brice

Liquifire84 · Post by **Liquifire84** » Sun Feb 03, 2008 12:07 am

They also had differnt carb. They had a PJ on the sport.

Brice

kansasen · Post by **kansasen** » Sun Feb 03, 2008 12:09 am

shorter deck height or diffrent piston? more compression?

Liquifire84 · Post by **Liquifire84** » Sun Feb 03, 2008 12:35 am

They used the same piston. Differnt jugs, differnt base, bigger crank, bigger main bearings, differnt intake, differnt head, bigger carb with PJ. These all add up to the 8 more HP. just a little of everything makes an improvement.

Brice