Author Topic: Need advice about Rocker Arms  (Read 2742 times)

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Offline MDGFLHR

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Need advice about Rocker Arms
« on: Saturday, October 09, 2010. 11:42:41 AM. »
My build is a 96 RK has 42 Mikuni Big Boyz Heads headwork 72cc 20 over stock pistons Woods W6H cam 590 lift and Ultima single fire ingnition and running stock .045 head gasket for now was wondering about going to the SE 1.725 ration arms would this be a good or bad idea? I know I may want to go down on my head gasket size also. Any ideas and or comments welcomed Thanks Mark

Offline wfolarry

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Re: Need advice about Rocker Arms
« Reply #1 on: Saturday, October 09, 2010. 02:09:36 PM. »
I wouldn't bother with that cam.

Offline fxr4mikey

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Re: Need advice about Rocker Arms
« Reply #2 on: Saturday, October 09, 2010. 02:31:54 PM. »
you already have a high lift cam (590).... those rocker arms will increase the lift, do you have the clearance ????? 
80" EVO - FXR4
SE Heads w/Adj pushrods
.030 HG Wood W6 Cam HSR42 Carb

Offline MDGFLHR

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Re: Need advice about Rocker Arms
« Reply #3 on: Saturday, October 09, 2010. 03:23:10 PM. »
Thanks for the info guys

Offline Hillsidecyclecom

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Re: Need advice about Rocker Arms
« Reply #4 on: Monday, October 11, 2010. 04:11:30 AM. »
Those cams have very quick ramps.
With those rockers, you might not like what you find.
Scott
"If I parrot or google information, folks will suspect I really know."

Offline ClassicRider2002

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Re: Need advice about Rocker Arms
« Reply #5 on: Friday, October 15, 2010. 09:45:59 AM. »
What did Big Boyz specifically do to your heads besides milling them to 72ccs ? ? ?

Regards,

"Classic"
« Last Edit: Friday, October 15, 2010. 04:18:55 PM. by ClassicRider2002 »
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Offline gryphon

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Re: Need advice about Rocker Arms
« Reply #6 on: Friday, October 15, 2010. 03:22:00 PM. »
Scotts last post brings something up I have wondered. I was thinking about using the SE rocker arms in my new build. I have been running a VT-3030 cam in my 97 inch motor and it is the one (after much trial and error) I have settled on for best all around performance without any objectionable noise. My thought were that running the SE's would bump it up from .530 lift to about .562 lift for use in the 111 incher I'm building. Since it is opening and closing more, in the same amount of time, would that necessarily lead to increased valve train noise.

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Re: Need advice about Rocker Arms
« Reply #7 on: Friday, October 15, 2010. 06:16:00 PM. »
im personally not a real big fan of upping the rocker ratio unless you cant get a bigger cam,if your going up in inches,get a more suitible cam (a 111" should have bigger than a .562 cam anyway).we run .561`s in 80" motors
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Offline gryphon

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Re: Need advice about Rocker Arms
« Reply #8 on: Friday, October 15, 2010. 06:43:10 PM. »
I have run higher lift cams in my 97 incher. I've run a .600 and a few different .585 lifts. After much trail and error the VT-3030 has turned out to be the best suited for what I want. It provides good all around performance, good milage, and it's. dead quiet. I haven't really found anything else with the same specs and I like the VT cams because of their gentle grinds which seem to keep valve train noise to a minimum. I'm not totaly sold on the higher ratio rockers either but don't have any real world experience with them to judge by.

Offline Buddy WMC

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Re: Need advice about Rocker Arms
« Reply #9 on: Sunday, October 17, 2010. 10:01:08 AM. »
I have run higher lift cams in my 97 incher. I've run a .600 and a few different .585 lifts. After much trail and error the VT-3030 has turned out to be the best suited for what I want. It provides good all around performance, good milage, and it's. dead quiet. I haven't really found anything else with the same specs and I like the VT cams because of their gentle grinds which seem to keep valve train noise to a minimum. I'm not totaly sold on the higher ratio rockers either but don't have any real world experience with them to judge by.

Gryph,
Gotta new set of TP's if you might be interested that are stock ratio. As I'm selling my FXLR I don't need some of the spare parts I've accumulated.

Offline gryphon

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Re: Need advice about Rocker Arms
« Reply #10 on: Sunday, October 17, 2010. 10:11:14 AM. »
Thanks but I've already got a set of S&S roller rockers. Just looking at alternatives right now. If I end up going with a mild lift cam I don't really need rollers and the SE rockers would give me that extra lift on an otherwise well suited cam.

Offline Buddy WMC

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Re: Need advice about Rocker Arms
« Reply #11 on: Sunday, October 17, 2010. 11:30:28 AM. »
Take a look at the VT 5010. Absolutely love it!!

Offline gryphon

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Re: Need advice about Rocker Arms
« Reply #12 on: Sunday, October 17, 2010. 04:23:35 PM. »
I ran the 5015 for a while and it did perform well with it. The trade off in increased valve train stress didn't really seem to justify the performance increase as compared to the 3030. I realize that a .530 lift is pretty mild for a 97 inch motor but it performs much better than many might imagine. Didn't you run a 5015 for a while?

Offline Buddy WMC

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Re: Need advice about Rocker Arms
« Reply #13 on: Saturday, October 23, 2010. 05:14:20 AM. »
Yep,
But came in a litlle too late for my style of riding. Swapped it out for a 5010 and with less duration and the same lift it is much better and I really like it. Comes in 500rpm sooner and still has the lift that the ported SE heads like.

Offline JamesButler

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Re: Need advice about Rocker Arms
« Reply #14 on: Monday, October 25, 2010. 09:16:56 PM. »
Buddy-
If you were to rec'd a V-thunder xtreme series cam would you rec'd for a modified 80" Evo build or would you stay in the EVL-30xx series?  Bike is an FXR3 with 2.93 final gearing, so power band is at 2,800-3,700,
9.0:1 corrected compression,  Ported heads, etc.

Offline gryphon

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Re: Need advice about Rocker Arms
« Reply #15 on: Monday, October 25, 2010. 10:29:40 PM. »
I have run a few different comp cams. In my experience, one of the most amazing cams for a modified 80" (and even larger) is the VT-3030. One of our other members has a couple of Dyno runs posted with it. It shows better than the Dyno runs that S&S used to post for the 80" motors they used to sell. Consider that S&S has all the money and expertise necessary to post their best results to impress buyers and 14frisco had better results. I am currently running that same cam in a 97 incher. It is not the fastest cam I have run in this size motor but just seems to perform well over a broad range. In the last 3 or 4 years I have tried 7 or 8 different cams at least. I have a 3.07 final ratio and find the 3030 starts coming on very strong right around 2800. Not sure how far it will carry because by around 4000rpm my right foot starts vibrating off the footpeg so I typicaly shift by around 3600 rpm. The 3030 would be killer in an FXR. I tell my son that all the time (he has an fxr and will get my 97" motor when I finish my 111").

Offline wfolarry

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Re: Need advice about Rocker Arms
« Reply #16 on: Tuesday, October 26, 2010. 04:30:29 AM. »
Actually S&S posts results that are on the conservative side so that everybody can get what's advertised & their phone isn't ringing off the wall when somebody doesn't.
There are a lot of good cams out there. Picking one can be a challenge. Stay on the conservative side & you'll be happy.

Offline gryphon

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Re: Need advice about Rocker Arms
« Reply #17 on: Tuesday, October 26, 2010. 08:53:30 AM. »
Makes sense that S&S would do that. Having been in business for some time now and likely hoping to stay that way I can understand why they would not want to get a rep for exagerating their performance. That aside however I stand by my recommendation of the 3030 cam, especially for an FXR that has been modified and has had head work done. The 3020 is a more conservative cam but for a motor that has had work done and can accomodate a .530 lift the 3030 is gonna be a tough one to beat. Especially considering that it is a nice quiet cam.

Offline JamesButler

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Re: Need advice about Rocker Arms
« Reply #18 on: Wednesday, November 17, 2010. 01:12:21 PM. »
Gryphon-
Thanks for the info on the 3030. It got me to thinking about your original question about using higher (1.725) rocker arms.
As my bike has 2.93 gearing, wouldn't it be better to go with a 3000, (which has a both low overlap value (20), and also an early intake closing (34), to provide great low-end power), and increase the .500" lift by going with the 1.725" rocker arms vs. stock at 1.625" - to benefit from the ported heads? 

Online evo58

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Re: Need advice about Rocker Arms
« Reply #19 on: Wednesday, November 17, 2010. 01:55:27 PM. »
MDGFLHR how about the W6H ????? have you dynoed ? i have one this on the shelf,
i asked to Fxr4mickey why dont use one of these, but i think he
dont want to hurt anything ,beside this the W6 is a good cam,
i have installed on my bike ( almost same setup Fxr4mickey) ,
i would like to know about the W6H.
Evo

Offline Buddy WMC

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Re: Need advice about Rocker Arms
« Reply #20 on: Friday, November 19, 2010. 06:28:05 AM. »
Gryphon-
Thanks for the info on the 3030. It got me to thinking about your original question about using higher (1.725) rocker arms.
As my bike has 2.93 gearing, wouldn't it be better to go with a 3000, (which has a both low overlap value (20), and also an early intake closing (34), to provide great low-end power), and increase the .500" lift by going with the 1.725" rocker arms vs. stock at 1.625" - to benefit from the ported heads?

Why don't you take a look at the specs on the VT EVL 5005? Might be just what you are looking for. I have used one available (under 1K), if you would be interested. Gryph also has someone interested, but I won't know about that until after the weekend.

Offline ClassicRider2002

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Re: Need advice about Rocker Arms
« Reply #21 on: Friday, November 19, 2010. 08:12:08 AM. »
Brian,

LOL STILL trying to seperate yourself from that cam...... : :smiled:

Regards,

"Classic"

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Offline JamesButler

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Re: Need advice about Rocker Arms
« Reply #22 on: Friday, November 19, 2010. 07:27:28 PM. »
Buddy-
I actually took some advice from "Classic Rider" and went with the EVL-3000.  Was considering the EVL-5000 but manufacturer had a problem and said the 5000 wouldn't be ready for at least a month.  In other matters, PM me tomorrow or when you find out more on your 70-tooth, pulley which your friend might want.

Offline Buddy WMC

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Re: Need advice about Rocker Arms
« Reply #23 on: Saturday, November 20, 2010. 06:01:23 AM. »
Brian,

LOL STILL trying to seperate yourself from that cam...... : :smiled:

Regards,

"Classic"

Yeah Tim,
Trying to sell off my stash of FXR parts to help crack the nut on the Tri-Glide. I gotta bunch of stuff listed in the swap meet cause I hate eBay. I'll bet someone will jump on the new 93 Inner and outer primaries I haven't listed just yet :wink: