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Cam upgrade Andrew's 23

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Old Aug 4, 2025 | 11:21 PM
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Default Cam upgrade
After the e23 Andrew's cam seems like the evo is running hot is the aftermarket ignition recommended or with the stock electronic okay
 
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Old Aug 4, 2025 | 11:27 PM
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Default Cam upgrade Andrew's 23
Engine running hot now after upgrading cam is a aftermarket ignition recommended or stock ignition will work
 
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Old Aug 5, 2025 | 02:18 AM
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The 23 is a fairly mild cam designed to work with a relatively stock 80" Evo. You can run it with your stock ignition just fine, however, if you want to maximise performance and have your timing / rpm limit adjusted to get the most out of your modifications - an aftermarket ignition would be a nice addition. You can always put it on the shopping list for later.

If you are running noticably hotter after swapping out the cam sounds like you might be running the motor lean. Have you bumped up your jet sizes to account for the new cam?
What do your spark plugs look like?
 
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Old Aug 5, 2025 | 06:34 AM
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Why start 2 threads for the same problem?
 
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Old Aug 5, 2025 | 07:04 AM
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Ignition should have Zero to do with Cam.. But...If the Timing was reset retarded, After cam replacement. gonna make heat
 
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Old Aug 5, 2025 | 10:40 AM
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Now there is only one.
 
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Old Aug 5, 2025 | 12:37 PM
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Originally Posted by Racepres
Ignition should have Zero to do with Cam.. But...If the Timing was reset retarded, After cam replacement. gonna make heat

I would say the pipes will make heat.. If too far advanced the motor will make the heat.
 
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Old Aug 5, 2025 | 05:54 PM
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Default Answer to cam question
Shoot me for adding two of the same questions dammit
 
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Old Aug 5, 2025 | 06:11 PM
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Originally Posted by Max Headflow
I would say the pipes will make heat.. If too far advanced the motor will make the heat.
Heat always eminates from Pipes...However...if Timing is Not advanced to where it should be...Retarded timing makes Excessive heat.,..Try it...
Or...Carry on rebuilding this Motorcycle!!!
 
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Old Aug 5, 2025 | 06:38 PM
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Originally Posted by Racepres
Heat always eminates from Pipes...However...if Timing is Not advanced to where it should be...Retarded timing makes Excessive heat.,..Try it...
Or...Carry on rebuilding this Motorcycle!!!
Both the motor and exhaust generate heat. They need to balance in such a manner that CHT and EGT are balanced to there own optimum number. Say 300 F for the heads and 600F for the pipes. The pipes are smaller and typically have heat shields where the heads and rest of the motor has more surface area to radiate heat.. Anyway too retarded and fuel burns in the exhaust pipe. Too much advance and more mixture is burned in the motor.. It's temp will increase and motor radiate more heat... CHT goes up.
 
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