Originally Posted by magnum629c
I here so many good things about them but the other day my buddy did the 37s in the same year and bike I have and my andrews 21/mukuni carb will have it for lunch... Seems like it pulls hard on top end no so much 0-60 like the 21s
I have seen you post how well your bike performs with just 21's. You must have been one of the lucky ones that got a good set of heads straight from HD. I really believe the variance in head volume from HD can make the same bike/ same year run a lot differently.
I just redid engine and added some more compression and went with woods 6 cams. Haven't been able to ride as I was in an accident on way to get it tuned. How high in rpm's do the 21's pull?
Op - way too many good builds out there with the 37 cams to question whether they are good performers. If you stayed at 88" and did not bump compression, they might be a little soft on bottom end, as they like around 9.8:1 CR.