Can someone explain the performance differences between the SE 204 cam and the SE 255 cam? Thanks.
Big Boyz Head Porting - Twin Cam Camshaft Comparator
You can use this above chart IF you understand a little about cams.
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Make sure your 3 windows say HD Injected 07-09 for your bike... Pick the cams listed...
Now Don't get carried away as Most Will, thinking bigger is better. It isn't . If you Go later intake close you will need to compensate More compression some place to make up for the lost compression... Larger pistons and Higher compression pressures are needed and that means $$$$$$$.. and planning...
Bolt-in cams that that work good are Usually early in closing.... 40* is pretty much NOT for the stock 96" motors without pistons and Head/valve work.
I'd never go past 34* even on a light bike (newer TC 96"ers) with out head work and higher compression then 40* to 46* would work.. BUT it is a Give and then Take away situation.....
I've built these above bigger builds and not simple to do properly, You Don't Just toss a cam at a bike even a bolt in, and expect it to work right.. Lots of Planning goes into the better builds using the best tried and proven combinations..(copy the winners)
Early intake valve closing @25* SE 255 cams have Low Torque , Com'n on early on the cam,good High lift .550 . Good breathers for the 96" bikes closing earlier than the 204 cams + More power thru higher compression than the se204 (SE 255=more compression staying in the motor because of early intake close)
The SE 204 Intake closes Later @34* with its lower lift of .508...Later closing of intake(stock cams closes a@30*) on the 204 means a little Loss of compression when compared to the stock cam and the 255's, which have More compression that the Both cams...
On a lighter bike like yours Mid weight.. the 204 will develop torque and power at HIGHER rpm's to make power in the power band while the 255's will make it earlier, down lower in rpm's... I don't want to keep my bike turning 3500 rpm to get some power DO YOU????
You have to decide If you are a Hot rodder or a Little Hot rodder..
Both cams will act totally different.... Personally, i would go with the SE255 with full stage one and a TFI ... The se255 are Made for the 96" TC engines and they really work Great....
I have built a few hot bikes and promised Not with my 09 FLHR but truthfully IT is a Hot Rod when I need it,,, it shows plenty of torque to Pull hard and Fast..... I would prefer the one I'm using now... SE255..
Oh sure, Later I'll go 103 and head work but right now i'm satisfied (for now).
Just My Way
Hope this Long explan. helped you out. It is from years of trying to do it right...... Others might get something out of I hope so.