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  #1  
Old 3rd November 2020
salmanmr salmanmr is offline
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Question Considering the Compu-Fire gen 3 starter, what do you think?

Hi, every buddy,

I am thinking of buying the Compu-Fire gen 3 starter part number:53886.

I have a 1999 Sportster, and I have installed:
- 1275 Hammer kit
- CNC heads + N4
- Evolution Industries Diamond Terminator Clutch Basket.

Unfortunately, there are not many reviews on them for Sporty. All I have found is that the Compu-Fire starter is overkill and could destroy the clutch basket.

I don't have an issue regarding the overkill part. I think it is better in the long run.
And I don't think it will destroy the clutch basket since I have upgraded to the Evolution clutch basket.

the reason for me going for this starter is:
- It drawing 175A. Drawing current is a concern for me since I have a small Antigravity Lithium Battery 12 Cell. I think the OEM starter will struggle to turn on the engine.
- If the Compu-Fire gen 3 starter is reliable, this will stop me from worrying about it in the future.

What do you think? Does any buddy have experience with the starter? Or heard anything about the Compu-Fire starter?

I added some links in case if any wants to look at it.

Black

https://www.directcycleparts.com/app...r-p-74575.html

Chrome
https://www.midwesttraction.com/stor...street--53883/


Thank you all,
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  #2  
Old 3rd November 2020
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sportsterdoc sportsterdoc is offline
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Research an All Balls 1.4 KW starter for bigger motor/higher compression.
It has ample torque and should draw 117 amps at 12 volts, after a fraction of a second in-rush surge
Also helpful to replace stock 6 gauge battery cables with 4 gauge welding cable.

https://www.jpcycles.com/product/382...yABEgLRofD_BwE
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Old 3rd November 2020
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Comment about clutch basket not understood

http://sportsterpedia.com/doku.php/t...k:evo:engctl02
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Old 3rd November 2020
salmanmr salmanmr is offline
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Thank you for your detailed response sir.

The All Balls 1.4 KW starter draw 117 amps is much helpful information.
I will go for it.

Regarding the clutch basket, what I understood from online reading, that the Compu-Fire starter (pinion gear) will destroy the clutch basket teeth (ring gear teeth).
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Old 3rd November 2020
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Electric motors have instant torque, so I suppose that an almost 3 HP starter pinion engaging the ring gear could have more wear than an almost 2 HP starter, but more than the 1.4 KW starter does not seem prudent.

Do change the battery cables.

What is the CCA of your battery?
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Old 4th November 2020
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I tottle agree with your statement, sir.

Yes, I am planning on changing the cables. I have found flexible battery cables from revival cycles. I saw a youtube video made by them, and it does look great! This is the video https://www.youtube.com/watch?v=8b5MfrQWJc4

Using the welding cable seems a robust method. However, it is very bulky and ugly!


Regarding the CCA of my battery, I didn't find any info about it!
The only thing I have found is 360 cranking amps. This is a link for the battery specs.

https://antigravitybatteries.com/pro...-case/ag-1201/
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Old 4th November 2020
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360 amps (30 second duration) at 32 F should be no problem
CCA is at 0 F.

I like welding cable or electric motor lead cable because it is fine strand wire, suitable for flexing.
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Old 4th November 2020
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Thank you for the feedback. I purchased the starter 1.4. hopefully, it will show up by the end of the week.
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Old 6th November 2020
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Today I received the All Balls starter. This is the report test that came with, in case someone may want to look at it!



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Old 7th November 2020
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At the 9 volt test (battery should not drop below 10.5 vdc, generally) it would draw 164 amps, after initial in-rush (1480 watts / 9 volts).

475 amps would be locked rotor, such as motor hydrolocked, etc.
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