| Author | Message | ||
     Numb_nutz |
I'm going to putting cam's in my 1999 S3 this winter and am looking at two choice's. Just wanted to see some other peoples thoughts. My bike is switched to carb, has pro series muffler, force air cleaner. I'm going to be using crane hi4 ignition. The cams I had in mind were SE 536 or SE 575. I've had head work done and the engine is 30 over. I'm looking for good low and midrange power but is a daily driver. | ||
| Rocketman |
Well, I love the way my N9's deliver power and I'm similar in set-up to you on my S1W except I'm not 30 over. I don't know what carb you're using but I always believed the HSR42 played a big part in getting instant throttle response and deliver it with a nice linear pull all the way to the top without any flat spots. Anyway, I'm sure the N9's are old hat now but I'd still rate them with a nice flowed set of TS heads. The lift I believe is .555 and a little clearancing is necessary on the inside of the rocker covers. I'd assume the .575 will require similar. Rocket | ||
| Bigblock |
I have n-6's in my M2 for 8 years now and I love them. The 536 is a great cam, and should bolt in your app, esp if you have head work done. If the valve springs are stock, you may need to check for coil bind. I believe rocket is right, and you may need a bit of clearancing for the 575's. If low and midrange is your goal, I would definitely choose the 536 cams, and it will still way outrev and just make more power all over than the stockers. A well setup CV carb can run real well for you, and that's what I like, but a lot of people like those mikunis. They can be a bit easier to get set-up sometimes. | ||
| Captainkirk |
I love my N8's and they are true "bolt-in" cams requiring no additional parts (i.e. pushrods, valve springs etc) and the difference was very noticeable from the stock M2 cams. | ||
| Rocketman |
Is my memory fuddled, or am I correct in saying the N8 is the same profile as the stock Thunder Storm cam? Rocket | ||
| Numb_nutz |
The 536's look like they are going to be the best bet for me. I have a stock CV carb on it now but was thinking a 44mm CV or the mikuni but i don"t know much about them. They look just like edelbrock QS. I had a Quicksilver on my softail for a while and was not impressed at all. | ||
| Bigblock |
http://www.andrews-products.com/motorcycle/cams/SP EV_B1200_cams.htm N4 is basically the X1 Lightning grind | ||
| Numb_nutz |
My motor is a thunderstorm, I was under the impression that N4 was what is in mine already. 497 lift I was told. | ||
| Oldog |
N_nuts / block do you have the FSM? I can check to see what the specs are, I am not sure about which Andrews grind it is one of the bolt in grinds is said to be the same as the X1 grind. [ I believe that it is the n8 ] (Message edited by oldog on December 07, 2007) | ||
| Matty |
The N4 is the Screamin' Eagle bolt in cam which is the stock S1W/S3/X1 cam. The slight differences in the numbers between the Andrews specs and the SE specs are due to the different rocker ratio numbers used - Andrews uses 1.633 and HD uses 1.65 to calculate the theoretical lift numbers. The stock cams are great for a daily driver, however the 536 can bring more midrange to the party. | ||
| Numb_nutz |
Will the SE 536 cams work with stock lifters and push rods? I already have the right springs and better valves. | ||
| Panic |
Stock 1999 lift: .458" (quoting AP) To install cams with greater lift, the height of the valves must be increased to retain the same geometry. Take 50% of the lift increase: For example, new lift .575" .575 - .458 = .117 .117 ÷ 2 = .0585" Now divide this by the cosine of the valve stem axis (29°), which is .8746. Result is .067" - if the valves are done, you need a lash cap around .065". They're available in several thickness between .050" and .075" IIRC. This may cause a rocker to strike the cover inside when closed, so check before tightening anything. | ||
| Bigblock |
You should be able to get away with bolting in the 536 cams if you have the right valve springs, but panic is correct and I would suggest checking geometry and clearance with them. In my experience with the 536 cams, the clearances were fine. We installed the cams with the supplied springs. 2 buells, an old school m2 and a 2,000 X1. | ||
| Bad_karma |
Kevin I have redshift 585/585 in my 1250 S1 and notice loss below 1500rpm but a nice linear pull to current red line of 6900. Starting, idling, running and tuning as smooth as stock. These required proper setup and , different valve springs. I have redshift 630/585 in the 88" in the S3. Very smooth motor torque everywhere and hammers the rev limiter at 6700rpm. But hard to evaluate the cams because of the cube change. Once again setup required and spring change required. The Redshift cams are installed on your gears making for less installation problems. I believe that is true for tubers not sure about XBs. Joe | ||
| Numb_nutz |
Great input so far, Thanks. The more i read I'm sure the 536's are the way to go. I want more pulling power thru the mid range but don't really want to lose anything on the low end. I had black diamond valves put in and the springs were SE .575 lift. As for the other great info Jeff posted my machinist will no all that good stuff. | ||
| Blake |
Kevin, I'd go with the SE 536's. Karma, "loss below 1500rpm" A typo maybe? Hope so. |
