Carlos,rodriguc said:If you are planning to advance the TW26 by 4 degrees, why not just install a TW21, which is already 4 degrees more advanced? Here's a comparison dyno of the two cams on the same bike.
I agree, the tuning could have been better, but that was what was available at the time.Totenkopf said:Carlos,
That is an interesting comparison. AFR wasn't quite right on one of them but still interesting. Do you happen to know if that is with the B style or C style LSR??
Depends who does your heads and how much your willing to pay for few extra ft-lbs and/or hp. I've attached two additional dyno charts to help you with your porting question. Both are on 95" builds with the V&H Slip-ons, one with ported heads (9.4:1) and the other with stock head (9.0-9.2:1). Each set of heads have stock valves. First, I would consider my riding style, to include what rpm range I normally ride in. If normally operating in the 2000-4000 range with the TW26, you may not see much of a perfomance gain to warrent the additional cost associated with the porting of heads. In other words, the stock heads seem to flow well enough to support the use of these cams and anything milder.akebhart said:Now that that is settled...it poses more questions. Since the tw26 is a mild cam with only a .490 lift would I get any benefit from porting the heads??