How to get more bottom end
How to get more bottom end
ok so I got my back back good as new.. i have incredible top end from like 3 to 6 grand.. but crap for low end. i practically have to down shift to 4th at 60 to pick up speed.... im trying to figure out how i could get some more bottom end to it.. this is what has been done to it...
flywheel was lightend and balanced
ev 59 cam
crane ignition
ported heads
10.5 to 1 compression
s&s oil pump and pushrods
kibblewhite valves
barrnett clutch plates and spring
i still have the stock carb and have dumper straight pipes on there...
i just replaced the chain and sprocket in the primary... i wanted to put diffrent gear to get more lower end but the chain was too tight so we had to put a new stock sprocket back on...
thanks for the help
flywheel was lightend and balanced
ev 59 cam
crane ignition
ported heads
10.5 to 1 compression
s&s oil pump and pushrods
kibblewhite valves
barrnett clutch plates and spring
i still have the stock carb and have dumper straight pipes on there...
i just replaced the chain and sprocket in the primary... i wanted to put diffrent gear to get more lower end but the chain was too tight so we had to put a new stock sprocket back on...
thanks for the help
Ultimate HDF Member
Joined: Jan 2008
Posts: 6,532
Likes: 132
From: SoCal
I had an 91 flstf and had a similar setup, 10-1, head work, 2-1 exhaust, and a ev-7 cam but I had 3.37 gearing stock and it still needed downshifts in the same situations you describe. I had less weight and a more revving gear set up than you do. I pulled out the ev-7 cam and installed a ev-35. I lost 3-4 hp but gained a ton of throttle response and ridability. I might switch out to a ev-46 and a better exhaust if I was you.
Road Master
Joined: Apr 2011
Posts: 1,145
Likes: 98
From: Colorado Springs
A good 2-1 pipe would definitely help. A supermeg would be my recommendation.
http://www.supertrapp.com/product_se...at.asp?CatID=7
Having said that, IMHO that's a lot more cam than I'd ever run in a street bike. I'd look for a cam with specs more like an Andrews 27 or 35.
http://www.supertrapp.com/product_se...at.asp?CatID=7
Having said that, IMHO that's a lot more cam than I'd ever run in a street bike. I'd look for a cam with specs more like an Andrews 27 or 35.
Road Warrior
Joined: Apr 2011
Posts: 1,443
Likes: 9
From: North Carolina
I bet that came doesn't come on till 3k, and straight pipe doesnt help also, but thats a secondary problem or fault, I run open pipes and have run 2-1 much better but not what I feel you are talking about.
Road Warrior
Joined: Apr 2011
Posts: 1,443
Likes: 9
From: North Carolina
do you have stock bore and stroke? and just high comp piston. who did you porting? not saying its bad but a bad or mis engineered port job can kill performance.
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Elite HDF Member
Joined: Jun 2007
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From: NW Arkansas
Reminds me of an old joke. Women is complaining to her significant other that her breasts are too small and she wants them to be bigger. He tells her, "rub toilet paper on them every night". She says, "does that really work?" He says, " it worked for your azz!"To the OP....gears!
Ultimate HDF Member
Joined: Jan 2008
Posts: 6,532
Likes: 132
From: SoCal
An Andrews 35 is a 3 on the intake and a 5 on the exhaust. I don't know if they make it anymore but ill bet if you send them an e-mail concerning this they will give you the power band range and a recommendation for an alternate cam. I am guessing an ev-46 would be an alternate. The ev-3 is a fun little cam as well. Either one would be yards better than the 59 in your case. The straight pipes are not helping the part throttle response. If I remember correctly the 95 softtails had a 61t rear belt pulley that kinda sucked. You need to figure out what gearing you have.