| Author | Message | ||
     Mcgiver |
That is the question. I have a 98 s3, with race header & muffler, race Air cleaner, & 42 Mikuni. I have sent off heads for stage 2 work, and 1250 kit. If I switch to the 536 cams how much power will I lose below 3000 rpm, or will I just not get an increase like I will above 3000 ? Or simply put how streetworthy are these cams? Thanks Brian | ||
| Spiderman |
I do not have a 1250 but I run the 536s. They are AWESOME. There is a small dip at 3k but then it shoots to the moon. The HP alone makes up for the small dip in tourqe and as long as you keep the R's up you will be fine. Idle is a little stumbly but not bad for such a large cam. Going smooth in first around 15MPH and rapping the throttle will loft the front end up pretty well. I have XB heads an pistons, 42MM and a hi flow intake and exhaust. I am running 95RWHP and 90FTLBs The power was climbing all the way up to 7k nice and smooth except for that small dip between aprox2600 an 2700. | ||
| Wolf102 |
listen to spiderman. i have 536 cams and they are awesome  | ||
| Mcgiver |
Thanks for the replies, just wanted to make sure I'm not going to have to slip the clutch a lot to pull from a stop. Brian | ||
| Hippyjoe |
I know these are great cams and a lot of people run them. And while you're doing a top end there's no better time to fit them in. Still, when I was researching cams here in the KV I found a couple stories of spun case bushings. No definitive reason was found, but someone suggested increased spring pressures associated with cams bigger than the bolt-in variety. I'm wondering how many miles bikes with these cams have logged so far... anybody hit 100k on big cams yet? That would be my idea of streetability, that's what an evo motor should hit before needing engine work, imo.... | ||
| Spiderman |
Ran the 536's for about 15k before I spun my oil pump drive gear, no noticeable abnormal wear what-so-ever. I am also running XB heads, those springs are designed for a taller lift, with the stage two McGiver is getting they will(should) put heavier springs in there.... | ||
| Natexlh1000 |
How do those cams compare with X1 stockers? | ||
| Spiderman |
well I was runnin X1 cams with the same set up and running 92 hp and 84ft | ||
| Natexlh1000 |
So a bit more lift then? | ||
| Chasespeed |
Yeah Nate, they have more lift than the N4s(stock X1) the N4 has around .497 and the 536s... well, nuff said there. Chase | ||
| Phat_j |
i've got the 1250 kit, 42 mik, se536, and xb heads....... force exhaust, and puttin down 103hp, and 88lbs of the rough stuff........ your stage 2 thunderstorm heads i would think should put you above me........ do yourself a favor and get some dyno time, it will do wonders..... yes the dip will always be there, but it can be minimized as spidy and i did on his bike.... | ||
| Ceejay |
I'm pretty much gonna repeat what spidey said but I got the SE 536's too, tstorm heads-slight homeboy port for what that is worth, 10 over, with a mik 42 and force "header"-I mated it to a wileyco can. I also have a dyna ignition but I can't remember which curve I used. Never dynoed but as spidey was saying you could feel it pulling up to redline. I used the lightest springs I could find for that spring height-ended up with some crane 155lb. a good idle can be tough to find and I would suggest a dyno tune, as my power isn't real strong below three grand but once your above that she's a hell of a lot of fun... | ||
| Rum_runner |
ceejay i just sent you a pm | ||
| Rick_a |
I have Andrews N9 and stock XB heads and am at 96hp and 82ft-lbs on a Dynojet. Raise the compression a bit (10.5:1 seems to work well) and you could actually make more power at lower revs. That's how it worked out for me. I gained 21 hp and 7ft-lbs peak with bolt-on heads over the Lightning heads that were stock. There is no torque dip anywhere...and surprisingly (and disappointingly) the torque curve is very low and mid orientated. I'm using a 42 Mikuni and a race header with a universal Supertrapp external disc. As Spiderman stated, streetability will probably not suffer much, though it is a but "lumpy" at low revs in 1st gear. NRHS has a lot of good info on their website for recommendations and tech tips. I'm finally doing headwork soon as I could not afford it before...I can't wait! |
