Decking the head and port tips? - Page 4

Tashka · 09-07-2018, 11:18 PM

Quote:

Originally Posted by JerryHawk250

Be careful not to advance timing too much. With the higher compression ratio you don't really want to advance the timing. Besides most of those so called performance CDI's are worthless. If you do anything you will want a programable CDI that you can physically adjust the timing table. Only problem is the programable CDI is DC which means you will have to convert everything from AC to DC system.

why would I not eant to advance the ignition timing? woulsnt a pefoamnce increase be had, especially at higher rpms where the advance stops?

What electrical system does the hawk run? how exactly wokuld i check, I have a meter. I saw the same cdi but with AC.

**JerryHawk250** · 09-08-2018, 08:15 AM

Quote:

Originally Posted by Tashka

why would I not eant to advance the ignition timing? woulsnt a pefoamnce increase be had, especially at higher rpms where the advance stops?

What electrical system does the hawk run? how exactly wokuld i check, I have a meter. I saw the same cdi but with AC.

The reason you don't want to advance the timing is because of the high compression ratio you now have. The higher compression ratio lowers the flash point of the fuel mixture so it will ignite sooner. Basicly you already advanced the time it will ignite. This is why you need to run a higher octane fuel that has a higher flash point so you don't have detonation. Aka knock.
The A.C. adjustable CDI I think you are taking about only adjust timing equally across the entire rpm range. So if you increase the timing at the lower rpm the motor will be harder to start.
A programmable cdi is tuned via laptop with a tuning program. You can manually set the time exactly were you want it throughout the entire rpm range.
The Hawk run an A.C. system.

If you search on here you will find a few people have tried the performance CDI and proved they don't work well on the hawk.

Tashka · 09-08-2018, 10:26 AM

What about this a.c. cdi?

https://transmic.net/2017/12/29/ac-cdi-v9/

It is programmable and about the same cost as the dc one you found. I think the hawk would get alot out of good ignition timing in the upper rpm range. I'll keep in mind not to advance too much.

Tashka · 09-08-2018, 10:27 AM

You can even change it using your smart phone wirelessly.

**JerryHawk250** · 09-08-2018, 11:04 AM

Quote:

Originally Posted by Tashka

What about this a.c. cdi?

https://transmic.net/2017/12/29/ac-cdi-v9/

It is programmable and about the same cost as the dc one you found. I think the hawk would get alot out of good ignition timing in the upper rpm range. I'll keep in mind not to advance too much.

Good find.

now that will work.

ben2go · 09-08-2018, 11:47 AM

The hawk charging system is DC. The ignition system is AC and powered by the stator and not from the DC charging system.

09-08-2018, 10:26 AM	#48
Tashka Join Date: Aug 2018 Posts: 158	What about this a.c. cdi? https://transmic.net/2017/12/29/ac-cdi-v9/ It is programmable and about the same cost as the dc one you found. I think the hawk would get alot out of good ignition timing in the upper rpm range. I'll keep in mind not to advance too much.
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09-08-2018, 10:27 AM	#49
Tashka Join Date: Aug 2018 Posts: 158	You can even change it using your smart phone wirelessly.
	0

09-08-2018, 11:47 AM	#51
ben2go Join Date: Jun 2011 Posts: 1,335	The hawk charging system is DC. The ignition system is AC and powered by the stator and not from the DC charging system.
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