I seem to be the only guy here who works on this engine, but I figure someone else might come along as crazy as me.
ZZP makes a $200 upper intake plastic insert for the L36, in which they essentially reduce the length of the runners by 3". I've been told that this really wakes up cars with an aftermarket cam. I don't have a cam, but I do have an intake, exhaust, 1.8 ratio roller rockers, and a ported LIM, all of which contribute to a better breathing engine.
I'll take pictures today as I do everything, but I'm being told by a member on the Bonneville Forum that a reduction of 1" in the runner length should give me quite a boost of power given my modifications and the overall engine design. The L27 has nearly just as much torque as the L36, but 35hp less, which is partially due to the cylinder heads, and partially due to the intake design.
The intake runners on the L36 are significantly shorter than the ones on the L27.
Observe:
L36 LIM:
L27 LIM:
As you can see, the L27 LIM runners are at least half a foot longer than those on the L36.
Unlike with the L36 upper intake plentum, the L27's upper intake works in conjunction with the LIM to create the runners instead of just serving as an extension. the problem with this is that there is a sharp angle at the point where the UIM meets the LIM. What I'm going to do is shorten the runners by 1" down to that point.
Lets see if we can make an L27 come alive. Pictures with further detail to come.
Topic: 3800 Series 1 Upper Intake Modifications (Read 1115 times)
