TheSamba.com :: View topic

Wed Apr 27, 2011 3:13 pm

Hey all,

just looking to bounce some ideas around.

Currently I'm dialing in the jetting on my 2110 (90.5x82)
5.4 rods
Web 86a 1.4
40x35 heads
9.5-1
44IDF

First round:
I had 36mm vents, 55 idles 155 mains 200 airs
Ran pretty good! def a little rich on the top end, throttle response was good but not quite as snappy as I'd like.

Second round:
34mm vents, 50 idles 140 mains, 200 airs.
Feels really loaded up and runs pretty bad. Horrible throttle response and little power

What are your guys thoughts? With the cam/head/rod combo I think the carbs are getting a very strong signal, and that the 36 vents might be more to their liking. I'm thinking of putting the 36's back in and playing around with the jetting. Any advice, criticism or comments?

Cheers,

Alex

Wed Apr 27, 2011 3:25 pm

what is your altitude where you are at?

Wed Apr 27, 2011 3:30 pm

Good point!

just a few hundred feet above sea level (Toronto Ontario, Canada)

Alex

Wed Apr 27, 2011 6:25 pm

I would try the 36's with the 55 idles, 140 mains, 200 airs, what emulsion tubes do you have? F11 should be right, you may need to go up on the mains a touch too, perhaps 150's. What is your timing set at?

Wed Apr 27, 2011 6:29 pm

66brm wrote: I would try the 36's with the 55 idles, 140 mains, 200 airs, what emulsion tubes do you have? F11 should be right, you may need to go up on the mains a touch too, perhaps 150's. What is your timing set at?

I'll give that a shot! The emulsion tubes are F11. Timing is 32* at full advance on a 009. I might drop it a degree or two to help with the smaller mains.

Alex

Wed Apr 27, 2011 7:49 pm

I would try 150 mains, 55 idles, 200 airs with those 36 vents.

Wed Apr 27, 2011 10:15 pm

I am building a 2110 as well. I had seen somewhere that with dual 44s to start with a 145 main jet....That is what i bought.

Wed Apr 27, 2011 10:49 pm

Remember these are just a guideline, each engine is unique in how it will respond to jetting changes, cam, compression, deck height, port work, manifolds, and exhaust will all affect the final jetting and getting it right. It takes time and a lot of fiddling to get it correct, even with a wideband O2 setup, to get transition right and have it a smooth streetable engine takes experience.

Thu Apr 28, 2011 2:09 am

Just wondering if we are over looking something here, it says in your first post 44 IDF, is this a Single IDF or Dual IDF's???? Just for Clarity....... RB

Thu Apr 28, 2011 2:50 am

RailBoy wrote: Just wondering if we are over looking something here, it says in your first post 44 IDF, is this a Single IDF or Dual IDF's???? Just for Clarity....... RB

dual