| Author | Message | ||
     Lakes |
Has anyone got can timing & duration & lift numbers of M2& white lightning thanks | ||
| Stev0 |
John, I'll have to double check my notes but the lightnin's have N4's and M2's standard sporty cams but the M2's changed spec in some countries for some years, I think the some of the later ones had N4's as well. The N4's and SE 0.497" bolt ins are pretty well the same Cam, my info is that Andrews were making the cams for HD through that period. If you havn't got the specs for those I'll dig them up as I have spreadsheets somewhere stevo | ||
| Lakes |
thanks Stevo, i was looking at the cam spec's in Andrews cat..., but looks like the SE that is the closest has a lot more TDC lift how much Comp did White Lightning have with those cams in? i like a lot of Torque | ||
| Stev0 |
I'd have to go back through my notes to check that. I recall the SE bolt ins used in the Buells were almost identical to the N4's, certainly any differences would be barely discernable in a real world situation... N4's are as big as I'd go for a torquey street motor at 1200... N2's or W grind cams are even better for bottom/mid but wont breathe as well up the top | ||
| Stev0 |
Andrews N4 Andrews V4 / N4 intake 30 46 exhaust 52 24 duration 256 256 54 98 104 101.0 0.490 0.490 0.216 0.189 2500 6500 Y SE bolt in Screaming Eagle Bolt-In intake 28 48 exhaust 52 24 duration 256 256 52 100 104 102.0 0.497 0.497 0.211 0.191 2500 6000 Y You wont pick a real world difference between those two specs. | ||
| Lakes |
I've got 215 pound cranking so think I need to use a cam to drop it to 200 or190 What do you think is good? I had barrels shortened to bring swish up got swish at 40 thou & have SE 1.72 rockers she goes strong just don't want to risk detonation as I'm deaf would slip that crank pin I'd expect Thanks for any help or advice as no experience with sporty cams | ||
| Stev0 |
215 is a lot, I guessing that's clean?? no carbon ?/ 0.040" quench is good, that helps a lot with reducing detonation.. Have the heads been profiled to match the pistons to get that 0.040" ?? as the thunderstorm heads are cast and to get the quench correct you really need to match machine the heads. 215 at cranking speed would say you have enough compression to easily run a lot bigger cam. the longer rockers give you a bigger cam anyway but it's still a lot of compression, which means yuo might have to pull timimng out to get it to run right, which means you may be wasting HP | ||
| Lakes |
yes all clean new rings valves re seated i had a guy thats about 129 KG ride it and could not hear it detonate. yes i have the lightning ignition module so will get an adjustable to take timing out. think i might get the compufire set up also i could not adjust idle mixture with the CV44 as frame & pipe make it near impossible, but friend had a 90 degree tuning screw driver like they tune jap multis still could not get it to fit. what do you use? | ||
| Stev0 |
mine are EFI, so I use ECM spy. Not a fan of the 44cv, I like the 40 tho, you've got to be carefull with fuel flow down the deep end with the 44 there are some documented issues. I've only played with a 44 on a Dyna wide glide, so I'm not sure what you're talking about with the clearance issues on the Cyclone. I know it's tight in that area but I haven't actually played with a 44 in that application. You can pull timing out of the whole lot by moving the Hall sensor, the same way I do with my 1200S sporty module. A lot easier than buying another module and with the 1200S it uses a MAP sensor has multiple curves, so I don't want to drop back to a 2 curve module. The problem with detonation is that it will be doing damage way before you hear it. | ||
| Lakes |
i love this carb, it's a woods rebel 43.5 had it a while. my friend has a real quick S1 thats just a 74 & has CV44 on he runs high 10 121mph stock wheelbase stock swingarm no wheelie bar foot shift & he is 90KG Cow did motor the cv44 has idle adjuster in same place as the CV40 the same guy with S1 also has a thunderstorm with EFI he wants to make it a carb bike don't know why. but he had an M2 00 that flew was stock just had 2 1/2" race pipe & white brothers E he dynoed it had a lot of discs in ran high 11's stock | ||
| Stev0 |
the M2's with the N4's can make good HP with the right pipe and tuning. My 99 S3 is as quick as my sporty was and it's only got the race pipe, module and air cleaner. I can get a lot more out of this without much effort but it's my rider untill the others get built.. The spare S3 I've picked up will look something like an S1 when I'm finished and it may get a carb due to trying to hide all the module and wiring of the EFI setup. Will see what happens, much refer EFI if I can get it to fit as it's soooo much easier to tune. Woods does good carbs.. might have a look at one myself if I go that way as I like a CV over a flatslide. | ||
| Screamer |
Andrews N4 data matched the early SE "bolt-in data. SE started using a different rocker arm ratio in the early 2000s to make the cam data look more competitive, but the actual cam profiles did not change. N4 (SE bolt-in)is a great cam set. | ||
| Buellistic |
If you want to make a much better cam out of the 1st step ScreamingEagle cam(N4), put a set of 1.75 to 1 CRANE rocker arms as "i" did ... Makes it a better low end performance cam in the RPM Range where "i" ride ... | ||
| Lakes |
thank you for that info Screamer. i think i'll get some N4's. & eather twin tech or Compufire ignition ( Stevo i don't have the same ignition as your 1200s, i got the trigger on end of crank pin, not knotched flywheels & crank position sensor )will also have to re check valve clearance with 1.72 rocker ratio. how much $ are the N4 cams? | ||
| Lakes |
Bulistic thanks for that info, i have the SE 1.72 ratio rockers now they look like stock rockers. i had them for my twin cam but not enough piston to valve clearance with cams i was useing. but i like the idea of higher ratio rocker as it not only opens the valves a bit more, but it opens the valves faster & closes them faster to help with torque thank you again Bulistic i always value your advice. | ||
| Stev0 |
My 1200S runs a standard Hall sensor, the same as in the standard sporties Evo Big Twins and Buells. The twin cams had the notched flywheels. The only difference is the cup in the 1200S has 6 notches instead of 2. The 1200S ignition was a hybrid of the Twin Cam and normal systems. | ||
| Lakes |
thanks stevo did not know what the term was for the evo trigger. do you know if the XB's use the N4 cams stock too? | ||
| Stev0 |
XB's use an E grind cam. it's got a lot more lift and it's comparable to but doesn't make as much power as well setup set of SE 0.536's in the setups I've used them in and they're also a very noisy cam. | ||
| Lakes |
thanks Stevo & hope you had a Merry Xmas m8 | ||
| Stev0 |
Started with a champagne breakfast and still drinking.... I'm mellow now LOL.... Hope you're having a good day too. |
