625 cams
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Looking over ( dyno runs) of many different cams i would call most of them comparable. The only cam i didnt see any runs for is the woods 999, but i dont think its what you are looking for. Calls for 10.5 comp. and the usaul other mods, but for the bike to come on at a lower rpm dont we usaully have to give a little back up top? Maybe a lower tooth drive would put you right where you want be, if possible for the fxsb.
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#8
How do you know you static CR is set at 10:1? IIRC, you posted CCP at 185/188 a while back which would indicate to me that static CR is about 9.8?
I don't think your exhaust is helping you either. I would bet replacing the OEM head gasket with a .030" head gasket will help with that flat TQ line from 2600-3300 and perhaps move the curve to the left a bit as well as produce higher peak numbers. A better exhaust will help with the flat TQ line and moving the curve to the left as well; like the D&D pipe.
I would not throw the baby out with the bathwater; you just need to improve on what you have.
I don't think your exhaust is helping you either. I would bet replacing the OEM head gasket with a .030" head gasket will help with that flat TQ line from 2600-3300 and perhaps move the curve to the left a bit as well as produce higher peak numbers. A better exhaust will help with the flat TQ line and moving the curve to the left as well; like the D&D pipe.
I would not throw the baby out with the bathwater; you just need to improve on what you have.
#9
That makes sense. I didn't realize I was as low as 9.8.
Moving it left isn't the ultimate goal the 57's run great. I was just wanting more power keeping the power where I'm at or left of it.
I installed a .030 head gasket. What pistons would get me to where I need to be?
Moving it left isn't the ultimate goal the 57's run great. I was just wanting more power keeping the power where I'm at or left of it.
I installed a .030 head gasket. What pistons would get me to where I need to be?
Last edited by Pigbacon; 11-30-2014 at 11:54 AM.
#10
That makes sense. I didn't realize I was as low as 9.8.
Moving it left isn't the ultimate goal the 57's run great. I was just wanting more power keeping the power where I'm at or left of it.
I installed a .030 head gasket. What pistons would get me to where I need to be?
Moving it left isn't the ultimate goal the 57's run great. I was just wanting more power keeping the power where I'm at or left of it.
I installed a .030 head gasket. What pistons would get me to where I need to be?
If you just want more, more cam will be required which will likely require better heads (IIRC your heads are Hillside Stage 1), larger T/B (you can have the OEM T/B bored) to supplement more cam as well as better 2:1 exhaust. You are still fighting the large back tire and the counter balancers that are power robbers; that big *** tire is also holding the initial TQ down as it robs power to get it spinning.
I still think a trans pulley change would be a more cost effective modification and would go that route before digging into the motor again. JMHO.