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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.
Do you have data or anything other than conjecture to back this up?
Originally Posted by 98hotrodfatboy
S&S, Woods or Andrews all have bolt ins that will out perform the fuelings without any other work. I would however suggest a good pipe, a/c and tuner...
Just curious if anyone has any Feuling cams in their motors?
I own a 2012 Softail slim, 103b, with Vance & Hines big shots staggered, screaming eagle air cleaner, dyno tuned with SERT.
I recently have discussed with my local speed shop that I want to add a little more power to my bike. He suggested Feuling cams either the 525, or 543 if we do head work and change the compression, and I've done tons of searches and found little information on them.
I normally ride solo between 2,500-4,000 RPMs and occasionally twist the throttle up to 5,000 RPMs. A well rounded cam would be preferred but with so many options one can begin to lose his mind. Haha
Can I expect a huge difference in power if I go with the 543 and head work, forged Pistons, ect. Compared to just bolting on the 525 and calling it a day?
Which set ups are you running in your 103s?
Any input would be appreciated, thank you.
I Based my advice on NJSlim quote of,
"Can I expect a huge difference in power if I go with the 543 and head work, forged Pistons, ect. Compared to just bolting on the 525 and calling it a day?"
The 525 is really not a plain bolt in.. If you look at the intake close of 42 degrees requires a bit more compression. Optimal would be 10.3 static minimum.
so If you want to go just bolt in like I said there are other cams out there that will get you where you want to go by using your current configuration and an earlier intake vale closing of 29 -37 degrees............
I know that my mr103 cams have an intake close of 33. But after reading this thread and looking at the other specs on my cams they are interestingly different than most ( especially on the exhaust side)They work pretty good though as a bolt in.
Hi I have a 11 Roadglide Custom 103. Installed Feuling 543's with Fullsac x-pipe & baffles. Stock heads. Dynoed @ 92 hp & 95 torque. Installed Hammer Performace 107 kit & their lmpact level heads. 10.5 compression. Now 100 hp & 107 torque. Over 100 ft lb torque from 2650 to 5000 rpm.
Hi I have a 11 Roadglide Custom 103. Installed Feuling 543's with Fullsac x-pipe & baffles. Stock heads. Dynoed @ 92 hp & 95 torque. Installed Hammer Performace 107 kit & their lmpact level heads. 10.5 compression. Now 100 hp & 107 torque. Over 100 ft lb torque from 2650 to 5000 rpm.
Well done... Compression bump to drive the cams. Nice numbers.
I need to decide in whether I want to just throw in a bolt in cam, or build the motor with a cam to match my specific set up. Once I make that decision than I can narrow down my options.
I trust my local speed shop, they are one of the best in New Jersey..but with so many options I need to keep an open mind.
I am running the 543's in my 103b with stock pistons and compression. Installed the full cam chest kit. I am very happy with the power it kicks in strongly at 3000 rpm. It is paired with a thunder max, pipes, etc.
I am running the 543's in my 103b with stock pistons and compression. Installed the full cam chest kit. I am very happy with the power it kicks in strongly at 3000 rpm. It is paired with a thunder max, pipes, etc.
Nice! What numbers are you pushing with that set up?
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