Common plenum or individual runners???, for gas milage and drivability Options

[Mueller]

for my 2316 it seems that the stock plenum might be reaching it's limits as far as volume goes.....so, I either fabricate a larger common plenum, or go with individual throttle bodies such as TWM or Jenvey*

single plenum would be easiest, but the individual throttle bodies look better (IMG:style_emoticons/default/smile.gif)

has anyone switched from one to the other on the same motor with everything else being the same???



*Jake Raby is the U.S. distributor of these....

[Jake Raby]

Bleyseng,
I have never had ANY engine that I could not design a proper cam for! The D jet that you are using is much more tricky and that cam will have split centers, split lift and split duration, so it won't be cheap! I do have 4 different masters we can work with and some data from Djet tests in the past to compare. Using the Djet SAFELY will sacrifice duration which will boost vacuum (atleast on the intake side) this will cost you drastic power of the potential of the combination using something else_Kit Carlson or Carbs... But If you really wanna use it, go for it- but its uncharted territory!

Getting a proper vac signal for the IR runners is easy. I have already found in the Kit Carlson testing the size of the vac ports needed as well as the hose and small collector that works best as well. One of the test engines that made the best power was an IR set up that actually idled and fired up with low speed operation better than the plenum based version in my 912E.

BUT you need the correct cam designed to make this easier- Yet again no problem because I'm a cam specialist on these suckers! Its just come from trial and error!

All the guessing and planning in the world and trying your heart out to get it perfect ain't gonna cut it! Unless you use a 100% proven arrangement that has all the bugs worked out and has EVERY part that was used in that arrangement installed- You can make a goof....

Don't be afraid of making goofs- If you are don't try it and pay someone else that is. Its impossible to build it perfect! It can ALWAYS be better! Take it from me, the guy that has torn a particular engine down 18 times making nothing but a cam change to find out the heads were the limiting factor because the ports and valves were too big! The issue looked cam related, but it wasn't.

Build it, drive it, and if you don't like it tear down and change it- OR get a full set up 100% designed to work and you better not complain about the friggin price, because all guesswork is removed and thats worth DOUBLE the cost alone!

BTW, I'm the only US based dealer for Jenvey TBs. I have exclusive rights to thier goodies and they are being added to our line up as we speak.

Take this seriously guys, but understand its never gonna be perfect-