Evo Ignition Coil
Seasoned HDF Member
Joined: Jul 2014
Posts: 8,565
Likes: 3,317
From: Cental, MI
Can't measure it either, on Racetrack.. Unless engine is Built with Dual Plugs for the Traditional Reasons.."Flame Travel"
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,006
Likes: 7,541
From: Poolville
I have a thread with pictures around here somewhere showing the damage to the cam position sensors (CPS), and it turned out that it wasn't the CPS. It was the oem timing rotor that was no longer round and was taken out the CPS..
Last edited by 98hotrodfatboy; Aug 18, 2025 at 05:43 PM.
Seasoned HDF Member
Joined: May 2008
Posts: 21,029
Likes: 12,550
From: South Carolina
My dual fire 1989 EVO, with stock ignition coil (that I have owned for 150,000 miles and 35 years) has never had "spits and sputters".
Last edited by Dan89FLSTC; Aug 18, 2025 at 05:56 PM.
Supporter
Joined: Jul 2008
Posts: 414
Likes: 336
From: Brick NJ
Not so sure about that statement, but I will say if you wanted to run more consistent and smoother, get rid of the OEM rotor (timing cup). The OEM ignition rotor.. They do flex and get out of round.. I personally experienced it.. I bought the CNC aluminum timing cup from Hammer performance.. It's solid aluminum nice and solid..
I have a thread with pictures around here somewhere showing the damage to the cam position sensors (CPS), and it turned out that it wasn't the CPS. It was the oem timing rotor that was no longer round and was taken out the CPS..
I have a thread with pictures around here somewhere showing the damage to the cam position sensors (CPS), and it turned out that it wasn't the CPS. It was the oem timing rotor that was no longer round and was taken out the CPS..
Seasoned HDF Member
Joined: Jul 2014
Posts: 8,565
Likes: 3,317
From: Cental, MI
Spend more Money...Gotta be Better!!!!
Edit; Some Claim..that the sound difference can be distinguished.. if true... The Stock Dual Fire says "Giddyup, GiddyUp"
Stick yer Taters!!!
Last edited by Racepres; Aug 18, 2025 at 06:59 PM.
Supporter
Joined: Jul 2008
Posts: 414
Likes: 336
From: Brick NJ
It was my local Indy that told me that years ago, of course he was a big pusher of the compufire ignition.
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Seasoned HDF Member
Joined: Dec 2005
Posts: 19,830
Likes: 7,968
From: poway
Not so sure about that statement, but I will say if you wanted to run more consistent and smoother, get rid of the OEM rotor (timing cup). The OEM ignition rotor.. They do flex and get out of round.. I personally experienced it.. I bought the CNC aluminum timing cup from Hammer performance.. It's solid aluminum nice and solid..
I have a thread with pictures around here somewhere showing the damage to the cam position sensors (CPS), and it turned out that it wasn't the CPS. It was the oem timing rotor that was no longer round and was taken out the CPS..
I have a thread with pictures around here somewhere showing the damage to the cam position sensors (CPS), and it turned out that it wasn't the CPS. It was the oem timing rotor that was no longer round and was taken out the CPS..
Sounds like someone smacked the rotor or it wasn't installed right.. That thing spins what 3500 max. My 113 used to run with a 7000 rpm rev limit.. Never an issue.. Maybe more on a hot sporty?
You sure the Hammer rotor was aluminum? I'd guess it'd work if the sensor was optical but I thought they were all Hall effect?
Last edited by Max Headflow; Aug 19, 2025 at 02:12 PM.
Stellar HDF Member
Joined: Aug 2020
Posts: 3,159
Likes: 2,202
From: College Station, TX
The only one I've see from Hammer Perf is machined steel. But that's not to say there isn't one.
https://www.1250kits.com/xlignition.shtml#timingcups
Paul
https://www.1250kits.com/xlignition.shtml#timingcups
Paul