04-25-02  400ex testing

Home

The tests performed on 04-25-02 were done using an engine built by JB racing. This used a
Wiseco 440 piston , a TC cam, 41mm FCR carb,and CAM II for the fuel. Present and helping
with the tests were Jody Bateman from JB Racing, Rich Hetrick from Hetrick Racing, and
Lazarus Sommers. There was almost 6 hours of testing done with various combinations.

Hetrick Racing pipe vs. Stock pipe:
This pipe has a 5 HP gain on bottom
and a 5 HP gain on top. This is
possible with a short tuned length by
using a reverse megaphone and large
head pipes.

Graph

HMF pipe vs. a Stock pipe:
This pipe does not use a reverse megephone
and is very long giving it a very long tuned
length. This results in tons of torque but it signs
of earlier than stock.

Graph

Hetrick Racing