cam choice

[txtec]

i have a 06 dyna and i just purchased s.e. 10.25 to 1 cast 95 pistons . i am going use stock heads, bike has 204 cams in it now .can i use the 204s ? if not choices look like 211s or 257s. i am using s.e. cams what would you suggest ?? a friend has a 07 fatboy with s&s 510s with 89 h.p. that outruns my dyna badly . what it gonna take to keep the fatboy behind ME??? please help this is embarassing . :(

[Mike]

The 211's will work, but the 257's will give more top end charge. If your willing to use the transmisson (downshift) and run at higher rpms (4-5.5k) the 257's will be more likely to dust your buddy. Do not use the 204's with the 10.25 pistons. Expect 92-95hp/100-105tq with the 257's in 95's with 10.3 compression/stock heads/good pipe/good tune. Recommend the Cometic .030 head gaskets with the 257's.

[txtec]

thanks for the info mike.i am studying basic head porting i will use the 257s .will i have to install comp. releases with 257s at 10.3

[Mike]

They are not required but would be a good backup if the battery gets low.

[txtec]

whats your opinion on the 251s?? would the have more midrange torque and cut down some downshifting??

[Mike]

The 251's will move the tq peak down by about 400rpm along with slightly less peak hp vs the 257's.