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Engine Mechanical TopicsDiscussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.
I am currently rebuilding a TP Engineering 107, 10:1 compression. It will be going into a stripped down 1998 Softail. I'm looking for camshaft recommendations. I do mostly around town and back roads. I'm not worried about hp numbers. I'm looking for a cam that will make good torque in the low to midrange area. It had a Crane H314 in it.
Here is a list of cams that I currently have access to. I'm not sure if any of these would accomplish what I'm looking for.
In a big inch motor bring the comp to 10.8:1 and throw in a Woods 9b, should easily hit 100 ft lbs by 2800. Just make sure your heads can handle the lift and valve to valve clearance..
Of the ones you have, I'd use the W6 or the EV46 at 10 to 1.. Should give you a bit down low in a 107.. The 326 and 314 are good cams but really need 10.5 / 10.8 respectively and are more mid to upper end cams. Ran a 314 in 116 ci TC and it made pretty good power considering the heads did not flow all that well. I'd put the SnS600 and W9B in the same area at the 314. They need compression.
So I've been doing some reading about camshafts and trying to educate myself. When looking at cam specs. What do I look at to know if a cam will work with a particular compression ratio?
It's all about intake valve close timing... To get the maximum benefit from the camshaft you want to make sure that the intake valve closing timing will allow cylinder pressure to be in the 190-200 psi range.. However you need to know what your static compression will be to match the proper cam.. Or you can pick a cam (based on your riding style) and through calculators figure out what static compression will be necessary to drive the cam to it's potential.. So figure out what your riding style is (where you want your power) x and pick a cam to suite that and build the compression around it.. LSA, lobe separation angle also plays a role in Where the Power band is in the camshaft. A lower LSA will bring a cam in earlier in the Power band (RPM range) and a higher lobe separation angle will bring your power in at mid to upper rpm range.. So where do you want your power band?
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TP Engineering 107" camshaft ??
