It's probably a 5 or 10 hp difference from a C & L to a JLP plenum. I had my
plenum ported by Stiegemeier for $85 and got around 5 hp. If you already have
the plenum just stay with what you have. I could see going with JLP plenum if
you went the Kenne Bell route.
I havethe stock elbow and Posi Ported stock plenum. I wouldn't mind freeing up some power by adding the JLP intake and after market elbow. However, I'd be better off putting those funds on a twin screw.
Okay I'll consider buying one after seeing some opinions, but I have also read that it raises the powerband slighly, really don't want to have to lose torque down low though? Also has JLP fixed all the fitment issues with the intake?
the inside of the c&l isn't horrible, the inlet side just needs to be gasket matched and ported a good 2-3", the outlet side is really rough, and needs to be cut smooth, opened up a tiny bit and smoothed out around the bumps. No before pics but the there shouldn't be a need to get into it the whole way through, just a few inches on each opening.
The JLP plenum won't show gains unless you really crank up the pulley ratio. I ran an Extrude Honed stocker when I put the MP blower on. The C+L had not been released to market yet. The ported stocker showed equal HP to the C+L on the dyno at a later date. Opening the inlet tract is beneficial on any positive displacement blower, but especially critical to reduce restrictions on small Roots blowers.
The big question is if it is worth the small gains for the rather large cost. For me the answer was Hell Yes! It allowed me to run 10 sec passes on the tiny blower. But I also simply love the "race fabricated" looks. And yes, the Eaton plenum is the one for the MP as well. The KB one is different.
1 - 17 of 17 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.