Don Williams
Forum Apprentice
What is the biggest cam u can b4 hard face rocker arms come into play 16v 1100
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Cam numbers
- Thread starter Don Williams
- Start date
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cbxchris
Guest
Well, they are all hard faced. I had a set refaced once and found them no better than new rockers. If this bike is for every day street use I wouldn't go close to a cam that large. I'm old and its been a long time but .370 sound about right to anyone? Any thing over .345 or so is pushing it on the street. I haven't looked at grind numbers on a GS in years although I raced one(several).
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gearhead13
Guest
This is a very interesting subject to me. A few guys say you can run cams up to .370 or so with no problem. Thats good news to me. What about the exhaust rocker on mine that has the oil groove in it?
But, WEB cams say that all of their grinds require hardwelding rockers.
At $60 US x 8 for hardwelding it doubles the cost. Then there are the 'highly recommended' mods like top end lubers and such. I think they would sell a LOT more cams if it wasnt required by them. Maybe a warranty issue?
But, WEB cams say that all of their grinds require hardwelding rockers.
At $60 US x 8 for hardwelding it doubles the cost. Then there are the 'highly recommended' mods like top end lubers and such. I think they would sell a LOT more cams if it wasnt required by them. Maybe a warranty issue?
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cbxchris
Guest
With the .370 cams you have spring issues as much as anything. I did run a .355 cam once and found it rather "peaky". I think a lower duration cam with lower lift numbers is a much better street cam without all the side issues. Will it produce HP (with a good head) like a .370 cam. No it won't. What it will do is live longer. One thing I found out the hard way nearly 30 years ago was what works on the drag strip usually doesn't belong on the street if you want to use it.
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Guest
Guest
You can run 370s with street seat pressure ( 42 - 45 lbs) with stock rockers in good condition.
Welded rockers are way better that the chromed stockers, so if your rockers are damaged, spend the money on the welded rockers rather than buying new oem.
Jay
Welded rockers are way better that the chromed stockers, so if your rockers are damaged, spend the money on the welded rockers rather than buying new oem.
Jay
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cbxchris
Guest
Jay, on a every day commuter 10 K a year bike you would recommend that? I guess the original poster here needs to clarify what his intent is.
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gearhead13
Guest
Correct me if I am wrong but from what i understand the .340 lift WEB cam has about the same duration as stock. So more of an overall increase in power, not just the top end. I have two sets of stock rockers, both intake ones without the oil groove of the exhaust rockers so I planned to use them.
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cbxchris
Guest
If you want to ride you have a good cam. Those rockers will work. Do as Jay said and set your spring pressure in the low 40's. A piston kit of acceptable size would be a big plus with those cams. 36mm carbs. Just a guess around 108-110 lobe center would be a good place to start.
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gearhead13
Guest
The engine in question is in my sig, a 750 with a wiseco k816 kit. Would 36 mm carbs be too big for it? Could i use the dynojet needles etc from my current carbs on them or what?
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Guest
Guest
With the .370s you need longer adjustment screws for 1100/1150 rockers
Don Williams
Forum Apprentice
now who makes a cam that keeps the tach drive?
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Billy Ricks
Guest
V&H cams retain the tach drive.
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Guest
Guest
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Guest
Guest
Is it true that alot of these cams are reground stock cams?
If so doesn't that wreck the case hardening or do they treat them after?
Dan
Dan
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Billy Ricks
Guest
I think I've seen that somewhere. I know the V&H cams are billet. I suspect Webcam is actually who supplied V&H.
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Guest
Guest
The Yosh cams kept the tach drive. At least the Stage I cams did. Not that you can buy them easily.
R
rosco15
Guest
I'm running gsxr rockers, 370 lift megacycle cams, and ape springs. I have the springs set at 40-42 lbs. with no problems to the rockers. I've heard others say heavier than 40 lbs and they had rocker problems.
Ryan is correct on the above post except that usually up to about 45-48 lbs on the seat is ok for stock rockers without much trouble. 50 or above seems to REQUIRE welded rockers. The problem with the stock rockers is that the base metal UNDER the chrome on the pad is softer than the chrome & it gives way & causes the chrome to flake off which eats the lobe. I have pulled motors apart & found a DIMPLE in the rocker from the metal being soft & the chrome still there. I have also seen stock rockers flake the chrome with stock cams but very RARELY! For the most part I use stock rockers for .370 lift down. I use welded rockers for .380 & above & EXTENDED pad rockers above .400 lift. I build my stuff kind of overkill for durability reasons so I'm sure someone on here has done more with less. Ray.
