| Author | Message | ||
     Dtmcnamara |
ok so I got the 1250cc kit. I got the rocker covers. I got the heads. replaced alll the seals inside the motor and now its time for a cam. I was looking into just getting mine grinded down and hardened cost is like $300. what other alternatives do I have? are there any good oem cams that will create some good power/torque or any aftermarket ones that aren't to much? | ||
| Jos51700 |
Just be sure the cam you get is compatible with the valvesprings you're running. Aim for a bolt-in/drop-in cam if you haven't checked the valveguide-to-retainer clearance. What RPM range do you want to make the power and torque? That will govern more of your cam selection than anything. Higher RPM cams make more power, but usually at the expense of low-rpm torque and response. | ||
| Jos51700 |
Headwork, intake and carb/throttle body combo, etc. will all play a role, too. Some cams are made for ported heads, etc. It can be a really complicated question if you want alot out of it. | ||
| Dtmcnamara |
I will have to check clearance. I would like to make mid to high end power since I will have enough low end. I just talked to my guy at HD in ga and he recommended a set or ANDREWS CAMS. any comments on then? | ||
| Mikej |
http://andrews-products.com/motorcycle/ There are quite a few options when it comes to cams. http://andrews-products.com/motorcycle/cams/SPEV_B 1200_cams.htm | ||
| Xldevil |
I would go for the SE 536 cams. Good all around street performance. But you will need to upgrade your valve springs and to set a tight squish . Ralph | ||
| Jos51700 |
Andrews has made cams for many years and is a reputable company. I know CycleConnection has done back-to-back cam comparisons and can make good recommendations, and I'm sure there are lots of others out there as well. Personally, I take first-hand opinions as a small factor when making the cam decision, and try to find dyno results for the rest. The dyno curve can give you an idea of what to expect as far as power band and power levels. I'd take the suggestions from here, and try to find an objective(no manufacturer dyno curves, please. They tend to be biased) dyno facility. Cycleconnection was very scientific in their data collection, and that's why i recommend them, but there are many many good shops that I'll never see.} | ||
| V74 |
get the se 536 cams,buy a set of high ratio rockers but put them in the intake side only,sell me the remaining two,this gives the bhp of 575 cams with the torque of the 536 and high rpm. | ||
| Jstfrfun |
In my case the Andrews 555 work great from 3000 off, no rocker changes no grinding no rockerbox changes just gobs of grunt. | ||
| Dtmcnamara |
this is my setup what do you think would be a good set of cams to use to get mid to high range. XB rocker covers XL1200 heads Revolution performance 1250cc kit Forcewinder xr2 intake d&d exhaust | ||
| Natexlh1000 |
I would have thought that the stockers would be just fine. Besides, you already own a set, right?  More money for beer. | ||
| Jos51700 |
Without head work, I'd run the stockers.... Decide where you want to make the power, then call the cam guys and see what they recommend. If they don't ask about your heads, intake, exhaust, street versus race, etc., hang up and call someone else. | ||
| Bad_karma |
David Check out redshift 585s Good mid and top end. Nothing below 1500. Joe | ||
| Dtmcnamara |
what about the stockers grinded and hardened? anyone gone this route? I should be able to keep everything else the way it is and gain a few hp and tq | ||
| Jos51700 |
You will require longer pushrods if go very far with reground cams, and regrinds typically can't add much duration, and so the motor loses topend. | ||
| Jos51700 |
Call the cam manufacturers, and get the specs on what they recta-mend. Then call the regrinder, and see if he can do it for you. Are the regrinds really that much cheaper? I've never priced them. | ||
| Dtmcnamara |
I was going to go with a mild regrind. I mainly wanted them hardened just to make them last longer | ||
| Captainkirk |
I would not recommend reground cams. Even if they are re-nitrided (Hardened) the failure rate is poor compared to new cams. I'm running Andrews N8's and I'm quite happy. These are the same lift as your N4's in the Lightning but longer duration and overlap. See the Andrews spec sheet for comparison). The beauty of these cams is there is no additional hardware required (valve springs, push rods, etc) They are true "bolt-in" and the difference (in my M2) was substantial. | ||
| Dtmcnamara |
so the n4's are really a "plug and play" cam? thats really what I want. I dont want to have to tear apart the top end again. At least not for another year | ||
| Captainkirk |
If you have a Lightning or Thunderbolt, you already have N4 cams. If you have an M2 you have Sportster cams. The ones I recommended were N8's. Yes, they are "plug and play". | ||
| Oldog |
get the se 536 cams,buy a set of high ratio rockers but put them in the intake side only,sell me the remaining two,this gives the bhp of 575 cams with the torque of the 536 and high rpm. Err you are kidding right? what is the advantage of this alteration ? hold the valve open farther hence longer? sounds like a potential problem to me. valve timing ( what the cams control ) must match the rest of the system. tweeking one part of it is like adding an open muffler and leaving a restrictive air box. the 1250 kit IMO does not add greatly to the displacement for drivability the stockers in the X1 [ N4 ?? ] make good sense, a mild hopup N8 sounds good too. | ||
| V74 |
a buell is a buell not a harley,big lift on the exhaust valves can negate big lift on the intake valves,why do so many seem to think big lift on both is good ?buells are quite efficient on the exhaust side and lack on the intake side,its easy to over cam on the exhaust side on a buell,how many times do you hear someone say ,after putting in big lift cams that their dyno results are disappointing.yes valve timing must match the rest of the system.matching it all is the key to an efficient engine.check out the valve lift and timing on the 1125r,ducatis and other v twins even BMW,s then again do you want high rpm hp or mid range torque,you cam and match the system to what you want from your bike. | ||
| Oldog |
I would presume that cams profiled and ground for standard valve train geometry, working with altered geometry may invite colision of the moving parts in the over lap phase. ducs and the 1125 rev much higher I would think that the open / close profiles would be some what different as would be the timing. this gives the bhp of 575 cams with the torque of the 536 and high rpm. from what I understand you can't have your cake and eat it too. as the output goes up for a displacement the revs go up range as does the power band, as a rule. } | ||
| V74 |
check out http://www.visi.com/~moperfserv/buell.htm 536 cams will add 1mm(aprox),crane 1.75 ratio roller rockers will add another 1mm(aprox)installed only on the intake side there should be no valve to valve or piston to valve clearance problems but rocker cover clearance might be,but this should be checked anyway.there would be closer clearances with redshift 585 cams. yes these bikes do rev higher but that should be the direction of thought,not the written in stone harley view,buells are buells not harleys/sportsters.i have provoked thought,i am happy | ||
| Rellim51 |
Drag racers have been using this trick on SBC's for years. As long as you don't run into coil bind you should be ok. | ||
| V74 |
THANK YOU | ||
| Hugie03flhr |
This is true, chevy guys are getting good results!!! Put the higher ratio on the intake = more HP & on the exhaust = more torque. I was on Ebay and I noticed alot of cams N8, N9, ect... good prices too. |
