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Author Topic: Tuning.....of course  (Read 500 times)

Offline 2Nubs

Re: Tuning.....of course
« Reply #15 on: October 08, 2018, 12:51:02 PM »
Also want to say, don't be afraid to put a fat main jet in it and go test ride it. If it's all fat and smokey you can come down a jet size or two and test again. Nice and safe.

As for the lean at idle, while it may need some fine tuning to correct, it's not going to hurt anything.

Offline FloridaRiderSG

Re: Tuning.....of course
« Reply #16 on: October 08, 2018, 03:17:05 PM »
Also want to say, don't be afraid to put a fat main jet in it and go test ride it. If it's all fat and smokey you can come down a jet size or two and test again. Nice and safe.

As for the lean at idle, while it may need some fine tuning to correct, it's not going to hurt anything.

Thanks buddy. Im going to grab my tools, jets, plugs and head down to Croom tomorrow to take it for a few runs, see how it feels a what the plug looks like.

From the dyno graph I dont think it looks to bad.....what do you think. Maybe one of the motor guys on here will pop in hopefully.

Offline hickwheeler

Re: Tuning.....of course
« Reply #17 on: October 08, 2018, 03:26:04 PM »
Be careful with a lean condition down low. That's when a cold sieze can happen.
88 330 worked over by Pete
88 ct350pv (BOF Build)
89 440 Packard built pilot  (Sold)

Offline 2Nubs

Re: Tuning.....of course
« Reply #18 on: October 08, 2018, 03:32:54 PM »
I stand corrected. I did not think a lean idle could hurt the engine. Apologize for the wrong info.

That is a perfect example of why I try to read things 2 or 3 times before applying them to my quad lol. Patience pays off.
« Last Edit: October 08, 2018, 03:49:14 PM by 2Nubs »

Offline FloridaRiderSG

Re: Tuning.....of course
« Reply #19 on: October 08, 2018, 03:54:39 PM »
Be careful with a lean condition down low. That's when a cold sieze can happen.
Thanks.....you think turning the air screw in a half turn would help? Im 1 3/4 out I believe, I have to check and make sure the dyno guy didnt touch it.

Offline hickwheeler

Re: Tuning.....of course
« Reply #20 on: October 08, 2018, 03:59:21 PM »
Ya it can happen when running hard and then just chop the throttle.
88 330 worked over by Pete
88 ct350pv (BOF Build)
89 440 Packard built pilot  (Sold)

Offline 2Nubs

Re: Tuning.....of course
« Reply #21 on: October 08, 2018, 04:18:19 PM »
Be careful with a lean condition down low. That's when a cold sieze can happen.
Thanks.....you think turning the air screw in a half turn would help? Im 1 3/4 out I believe, I have to check and make sure the dyno guy didnt touch it.

I do not think that will hurt. That should richen up the pilot circuit some.

I'm just curious if that lean condition on the graph is under full throttle or not. I'm not questioning the dyno operators abilities at all, just curious. I know that part throttle will read lean.

Offline FloridaRiderSG

Re: Tuning.....of course
« Reply #22 on: October 08, 2018, 04:22:32 PM »



Be careful with a lean condition down low. That's when a cold sieze can happen.
Thanks.....you think turning the air screw in a half turn would help? Im 1 3/4 out I believe, I have to check and make sure the dyno guy didnt touch it.

I do not think that will hurt. That should richen up the pilot circuit some.

I'm just curious if that lean condition on the graph is under full throttle or not. I'm not questioning the dyno operators abilities at all, just curious. I know that part throttle will read lean.

He would hold it at 4000 then hit it, it would lean out then catch up with fuel. The guy jammed me up bad, ruined my train of though with the way he was doing things.

Offline 2Nubs

Re: Tuning.....of course
« Reply #23 on: October 08, 2018, 04:57:25 PM »
Do you have some main jets on hand?

If it ran decent on the dyno, I would turn the A/S in a bit as you said. Then I would throw a much larger main jet (say 180) in and do some testing. At worst, it's so rich that it wont run real well. If it does run well and cleans out I think that would tell you that the 170 was in fact lean.

Offline FloridaRiderSG

Re: Tuning.....of course
« Reply #24 on: October 08, 2018, 06:24:08 PM »
I did the air screw, now it 1 turn out and yes I have some mains. I dont think its lean up top, just in the middle. I think Im good, going to ride it and check plugs. It is what it is.

Offline 2Nubs

Re: Tuning.....of course
« Reply #25 on: October 08, 2018, 07:29:13 PM »
I did the air screw, now it 1 turn out and yes I have some mains. I dont think its lean up top, just in the middle. I think Im good, going to ride it and check plugs. It is what it is.

You got it man. Just get some seat time and see what the plugs say. Have fun!

Offline FloridaRiderSG

Re: Tuning.....of course
« Reply #26 on: October 08, 2018, 10:45:41 PM »
Thank you for all your help!! Very glad I met you.

Offline 2Nubs

Re: Tuning.....of course
« Reply #27 on: October 09, 2018, 10:07:22 AM »
No prob at all man. I'm right there with you. Got a ton of help from these guys when getting mine right.

I'm still messing with jetting actually. Just fine tuning now.

Offline FloridaRiderSG

Re: Tuning.....of course
« Reply #28 on: October 11, 2018, 02:16:51 PM »
This was after riding for 15 min, I could not do a wide open test, no room.

« Last Edit: October 11, 2018, 02:18:41 PM by FloridaRiderSG »

Offline 2Nubs

Re: Tuning.....of course
« Reply #29 on: October 11, 2018, 02:30:48 PM »
Don't want to trust a plug too much that has been ran at all RPM's, but I'd still say it's rich based just off the base ring of the threads being jet black.

Once you can open it up to full throttle, warm it up well and then throw a fresh plug in it and do the pull, shutting it off with the throttle wide open. That will be the most accurate spark plug to read.