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Sportster Motorcycle Air intake, Carburetor, EFI, Fuel, and Exhaust Problems, advice and/or how tos for Sporster and Buell motorcycle carburators, Electronic Fuel Injection (EFI), Air Intake, Fuel and Exhaust.

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  #31  
Old 16th November 2019
Tomcatt Tomcatt is offline
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[QUOTE=60Gunner;5788778]And that's with a 2-5 hp advantage with EFI. More than offsets my small increase in displacement to a 1250./QUOTE]
There's not just the 50cc of displacement, there's cranking pressure and squish clearance also. They're worth more.

What I have is a nice torque curve that will just move up. Makes for a nice, flexible, tractable motor that doesn't have to be kept over 3,000 rpm.

If I don't like where this ends up I can always change cams.
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Last edited by Tomcatt; 16th November 2019 at 21:24..
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  #32  
Old 16th November 2019
60Gunner's Avatar
60Gunner 60Gunner is offline
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[QUOTE=Tomcatt;5788781]
Quote:
Originally Posted by 60Gunner View Post
And that's with a 2-5 hp advantage with EFI. More than offsets my small increase in displacement to a 1250./QUOTE]
There's not just the 50cc of displacement, there's cranking pressure and squish clearance also. They're worth more.

What I have is a nice torque curve that will just move up. Makes for a nice, flexible, tractable motor that doesn't have to be kept over 3,000 rpm.

If I don't like where this ends up I can always change cams.
Are you done now?
Who said I have to stay above 3000rpm?
You spout that same nonsense in every thread that comes up asking about Hammer cams. Especially the dead end 570s as you call them.
Who are you trying to convince? Them or you?
Change your frickin head gaskets. It's a few hours and costs jack. Or don't. Makes for a good excuse for those piss poor numbers on an efi bike with a cam upgrade and Rush slip ons.
Pretty sure Hammers' dyno of the 570s on an efi bike with CycleShacks was a stock 1200. Squish and all.
__________________
05 1200/1250C/Hammer 570 Cams/E1 clutch kit +15% spring
TC88A Gunner's V00D00 map/DCPR7E/Taylor Pro 8mm
S&S Premium Lifters/KhromeWerks HP Plus 3" slip ons
HSR42 25 pilot 2 turns Y8 needle jet 97 needle 2nd groove 170 main
Dragtron II AC K&N filter/VR1 20W50/Spectro 85wt Primary Oil
Max torque 87.7@4400rpm/max hp 86.8@5600rpm




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Last edited by 60Gunner; 16th November 2019 at 22:17..
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  #33  
Old 17th November 2019
Tomcatt Tomcatt is offline
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Quote:
Originally Posted by 60Gunner View Post
Are you done now?
Who said I have to stay above 3000rpm?
You spout that same nonsense in every thread that comes up asking about Hammer cams. Especially the dead end 570s as you call them.
Who are you trying to convince? Them or you?
Change your frickin head gaskets. It's a few hours and costs jack. Or don't. Makes for a good excuse for those piss poor numbers on an efi bike with a cam upgrade and Rush slip ons.
Pretty sure Hammers' dyno of the 570s on an efi bike with CycleShacks was a stock 1200. Squish and all.
Wow. Maybe you need a new therapist...
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