Only Cub Cadets

Only Cub Cadets (https://www.onlycubcadets.net/forum/index.php)
-   Tractor pullers using Cub Cadets! (https://www.onlycubcadets.net/forum/forumdisplay.php?f=12)
-   -   Timing (https://www.onlycubcadets.net/forum/showthread.php?t=38014)

blee128 04-01-2015 07:24 PM

Timing
 
For the engine builders what is a good timing mark to run a k321 at or a ballpark and is 22 degrees to much?

J-Mech 04-01-2015 07:41 PM

What is your top end RPM? What fuel?

IIRC, 20° is the stock setting so, 22° is probably a good place to start. Timing depends on a lot of things. You have to play with it.... it's like tuning a carb.

blee128 04-01-2015 07:51 PM

Not sure of the rpm its non governed but running 110 race fuel a fellow here at home told me to set it at 22.5 so I'm just getting some more opinions

J-Mech 04-01-2015 07:56 PM

Don or Austin would be better to answer, hopefully they will come along.

Since it's an open RPM motor, I would say that 22° may not be near enough timing. I would think more along the lines of 25/26°.

blee128 04-01-2015 08:00 PM

Ok thanks but like you did you have to play with it I'm just looking a good starting point lol

dvogtvpe 04-01-2015 08:01 PM

timing depends on a few things, what type of ignition, plug location, number of plugs, stock or billet head, chamber design, compression ratio, carb size, fuel. I've run everything from 20 to 35 degrees ,

Sam Mac 04-01-2015 08:19 PM

Quote:

Originally Posted by dvogtvpe (Post 320138)
timing depends on a few things, what type of ignition, plug location, number of plugs, stock or billet head, chamber design, compression ratio, carb size, fuel. I've run everything from 20 to 35 degrees ,

Just my 2 cents but if your building a puller engine dvogtvpe is the master. Listen to his advice and consider it to be like going to school. :beerchug:

J-Mech 04-01-2015 08:26 PM

Quote:

Originally Posted by dvogtvpe (Post 320138)
timing depends on a few things, what type of ignition, plug location, number of plugs, stock or billet head, chamber design, compression ratio, carb size, fuel. I've run everything from 20 to 35 degrees ,

There we go. :beerchug:

blee128 04-01-2015 09:07 PM

Stock head that's been shaved trigger ignition plug is over exhaust valve 110 racing fuel carb is a 26 kohler should be getting some work done to it this week the 26 came on it don't know why the guy took the 30 off but got it so gonna use it

austin8214 04-01-2015 09:39 PM

Quote:

Originally Posted by blee128 (Post 320165)
Stock head that's been shaved trigger ignition plug is over exhaust valve 110 racing fuel carb is a 26 kohler should be getting some work done to it this week the 26 came on it don't know why the guy took the 30 off but got it so gonna use it

Don might feel differently but, I think you are wasting your money buying 110 fuel. Can you tell us more about the engine internals? Cam spec, bore, how much was removed from the head?

Shrewcub 04-01-2015 10:40 PM

I agree with austin, unless you have the compression ratio to justify it, 110 is probably too much.

dvogtvpe 04-02-2015 05:30 PM

you have a good rod in that thing and a steel flywheel? the fuel you are running is pretty much a waste of money, just guessing a place to start is 26-28 degrees. you'll have to try different settings and see how it works for you.

blee128 04-03-2015 07:52 AM

Yea good rod and 30# steel flywheel and fuel is free so might not be the best but no money wasted lol

dvogtvpe 04-03-2015 06:10 PM

1 Attachment(s)
true , but I'll bet you spend more money trying to make up the lost horsepower from running that race gas than you will by using the right stuff

blee128 04-10-2015 11:04 AM

Yea your probably right


All times are GMT -4. The time now is 05:12 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2026, vBulletin Solutions Inc.