So...Im lloking for some cams. I called of course JWT. And i have heard a few things about these cams. 1) they make a ka very fun to drive as the pull to the top end easily. But, knowing the technics of how cams work, im weary.2) they are expensive(585.oo)....ill explain.
When a Cam comes with a advertised duration of 275(like jwt) or 256 (what people have said jwt's cams REALLY are), etc...they start to have alot of overlap. This is good for an n/a setup. Lots of big duration and moderate lift with overlap. Problem is, when on a turbo car, this is not optimum. More duration is good to an extent, but too much and then you have the excessive overlap, too. Big lift with no overlap(or minimal overlap is a good combination), is the best, but its pretty hard to do that. Youll alwasy have some overlap. The jwt cams do help a good bit, dont get me wrong. But anybody wonder why they dont help as much as the 272 cams do on an sr? I can tell you. 2 reasons...the sr 272 (pick your manufacturer, it doesnt matter) camshafts are designed with turbo in mind...so even though they say a big duration like 272..its more like 258-260 (or as low even as 218 (pdm)etc...these "272" and "264" cams are really just generic numbers. It all in how its measured, and most of the time they use a diff. method to get duration measurements than you do) With a big lift and less overlap. And also....CAM GEARS are readily available to retard exhaust timing to pull some of the overlap out.I spoke to brian crower at crower cams for about an hour the other night. He told me that he could work me a set of suctom cams for about xxx amount of dollar(wish i could say..but if he hooked me up, i dont want to cut my own throat
) andthese were not regrinds, they were brand new billet cores, with a custom grind to add around 30 to the wheels. This is info from him as well...if I can wait for about 2-3 more months, then hes going to be finishing up some off the shelf cams with springs and retainers that would be more powerful than the custom ones he could make me right now. Also, maybe more power and definatley more top end. SO im going to wait.Heres finally what im trying to know:JWT sells cam gears for the ka24de motor...stillen sells em too for about 150. I want to get a set of these for obvious reasons, and I want to know if anyone has used these. What was the install like? How much of a biotch was it to tune these? etc....Any help you guys have is greatly appreciated.-Thanks,
josh:ylsuper