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80" 80HP ( Winter thread)

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Old Jan 5, 2022 | 07:22 AM
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Default 80" 80HP ( Winter thread)

Shopping for an FXR ( I know, might take awhile)
Research indicates that 75-80 HP can be built with stock stroke
I`m thinking CP 10.5 pistons for an actual 9 point something
Andrews EV ? / Head work / 5500 rpm limit ignition
My personal preferences dictate a CV carb and either slip ons w/ stock head pipes OR Supertrapp 2into 1
What say the smart guys ?

THX
 
Last edited by eighteight; Jan 5, 2022 at 08:22 AM.
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Old Jan 5, 2022 | 08:24 AM
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Smart guys? Here? Haha! J/K. I would think you could do better than 75hp tho. 5500rpm limit ignition? What's that about?
 
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Old Jan 5, 2022 | 08:35 AM
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Originally Posted by 60Gunner
5500rpm limit ignition? What's that about?
Personal preference.
 
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Old Jan 5, 2022 | 09:52 AM
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Rush makes a great slip on. Stock head pipes. Go with the 1.75" baffles. They can had for around $200 now. Nice deep rumble, not too loud, and perform great. Had them on my 100hp stage 2 103 with the 2" baffles.
Khromewerks HP Plus is another.
 
Last edited by 60Gunner; Jan 5, 2022 at 09:55 AM.
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Old Jan 5, 2022 | 10:25 AM
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I'd suggest the powerhouse 595E. I have had good luck with that cam in a 80 evo, but with 5500 redline. Don't know if high end power would be useful. The 565vp is a mid range tq cam.
 
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Old Jan 5, 2022 | 11:51 AM
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Originally Posted by hrdtail78
I'd suggest the powerhouse 595E. I have had good luck with that cam in a 80 evo, but with 5500 redline. Don't know if high end power would be useful. The 565vp is a mid range tq cam.
Yeah, that 80" likes to rev too. That would be my choice. Up that rev limit to 6500 at least. Even 6800.
Hammer performance has a great cam in that rpm range too for an 80" evo. Their 560s. Or even 600s.
In your rpm range their Jackhammer 570s would work well.
 
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Old Jan 5, 2022 | 12:01 PM
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Contact @Hillsidecycle.com 80 hp is pretty easy, mine was in upper 80’s headwork and Woods Cam
 
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Old Jan 5, 2022 | 12:18 PM
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Originally Posted by 60Gunner
Yeah, that 80" likes to rev too. That would be my choice. Up that rev limit to 6500 at least. Even 6800..
That yields a mean piston speed of 4800 fpm
Out of MY comfort zone on a tractor engine

 
Last edited by eighteight; Jan 5, 2022 at 12:56 PM.
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Old Jan 5, 2022 | 12:23 PM
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Originally Posted by Paintslinger16
Contact @Hillsidecycle.com 80 hp is pretty easy, mine was in upper 80’s headwork and Woods Cam

Good advice ! but I won`t burn a shops time until I find a suitable candidate
 
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Old Jan 5, 2022 | 08:34 PM
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What are you looking to spend???
 
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