LZ23 Mikuni Tuning

[Dimerforlife13]

I built a LZ23 a while back and have finally go it running and broken in. I bought a set of mikuni 44's that came off of a l20 that I want to put on my LZ.

 

Jetting specs:

OA Jet Block

220 - Main Air

162.5 - Main

57.5 - Pilot

50 - Pump

41 - Venturi's

 

Specs on my LZ23:

Z22 Bottom end

KA24e Pistons

U67 Head-Lot of port/bowl work, s/s Z valves

Custom schnieder reground cam-power from 3200-7500

Header-2 1/2in exhaust

Everything was balanced & blueprinted

 

Question is regarding jetting and timing. I was wondering if anyone can give me a heads up on where to start from. I know I'm going to be limited on timing due to my setup and lack of combustion chamber "quench". I have access to a smog dyno, but I need to get it close first. Any advice?

[69FJWagon]

all that stuff sounds good about the same as what Troy ended up with in Lisas 2.2 the only thing I would change is the venturi's 41s are huge and you will end up wit a stumble off idle until your air speed picks up I would run 37s it will increase your air speed off idle and gain some torque as well

 

Timimg start with around 10* base and 32 full advanced

 

if you notice any pooping out of the carbs around the transition (2700-3200rpm)go up on your pilots

[Dimerforlife13]

Well thank you, I'll start looking to for some venturis. Does troy keep any mikuni parts in stock? Thanks again for the advice.

 

-Brett

[EricJB]

I have a set of 44 mikuni's with 34mm venturies I might be interested in trading for your 41's. Might have to trade some jets as well. I will post up the #s when I get a chance.

[banzai510(hainz)]

Just run it and see what happens!!!!!!!!!!!!!

adjust timming to light 15BTDC

 

all 44 dont have a vac adv that I have seen.