 |
|
11-17-2010, 11:46 PM
|
|
|
How come no one ever talks about roller rockers here?
|
I've learned alot here on this forum but no one ever brings up the subject of roller rockers here. What their advantages and disadvantages are, when to use them and why or why not use them ect.
|
|
|
__________________
Hawg Wired, Gauges by Marty, Big Sucker AC, Big Boyz Heads, Throttle Body Ported In House, TMan Cams, Drago's Bike Works Dragula, TTS MasterTune
|
11-18-2010, 12:03 AM
|
|
|
Different forum
There is a seperate forum for engine related techie-gee-whiz-bang valve stuff.
Just sayin.... 
__________________
 DohaDex
USAF Ret. MSgt "AGE" (78' - 00)
2010 FLHR, Flame Blue/Silver, Cruise, V&H MO, Big Sucker Stg 1, Custom Dynamics LEDs, FM PCV, Redline SP, Mobile 1 V-Twin, Harley Goodies FB Ext., Heritage Style bars, Proud American Legion Rider, Post 356
"... suddenly...commit random acts of coolness..."[SIGPIC] 
|
11-18-2010, 12:07 AM
|
|
|
I'll take a Rolling Rock thank you. 
__________________
2010 Road Glide Custom
"Louder Than God's Revolver And Twice As Shiny"
|
11-18-2010, 12:08 AM
|
|
|
Too bad there isn't one for people who give meaningless replies.
__________________
Hawg Wired, Gauges by Marty, Big Sucker AC, Big Boyz Heads, Throttle Body Ported In House, TMan Cams, Drago's Bike Works Dragula, TTS MasterTune
|
11-18-2010, 12:12 AM
|
|
|
Quote:
Originally Posted by 1931jamesw
Too bad there isn't one for people who give meaningless replies.
|
You have a point there........... I'll give it a bump up to hear about roller rockers!
__________________
08 BAT-KING FLHRC/TCU ---------- 99 FXR3 Candy Blue Flame
Fully dressed 2008 FLHRC, SE 255 cams, V & H 2-1 Chrome Pro-Pipe, ARC 125.2 mini amp, 2-5.25's & 2-4", Sony DSX-S200/iPod supplies the tunes 
Stock 1999 CVO FXR3
|
11-18-2010, 12:16 AM
|
|
|
rumor has it that if you got a cam with a .510 lift or greater rollers are a good idea. They keep the valve train straight on a high lift cam. Less wear on the top of the valve due to the roller vs just scraping the top of the valve stem.
__________________
 TMax, D&D, Heavy Breather and just generally way too much stuff to list it all.
"Don't hit at all if you can help it; don't hit a man if you can possibly avoid it; but if you do hit him, put him to sleep." - Theodore Roosevelt
Well, you wonder why I always dress in black,
Why you never see bright colors on my back,
And why does my appearance seem to have a somber tone.
Well, there's a reason for the things that I have on. - Johnny Cash
|
11-18-2010, 12:25 AM
|
|
|
I am not sure exactly what the differences are in motorcycles but I have experience building small blocks and the main advantages to a roller rocker is under high lift situations it prevents sideloading the valve stem which extends the life of the valve guides and it also reduces friction at the valve tip which would reduce heat, slow down wear, and free up a couple ponies. I am also not sure how much the rpm levels apply in this particular situation but in higher revving motors you need to either lighten up the reciprocating mass or increase valve spring pressure to keep from experiencing valve float and with higher valve spring pressures the factory stamped rocker arms aren't exactly up to the task. My assumptions with the lack of talk about them in these forums is that the shaft rocker setups in harley is a pretty stout setup from the moco for the average stage one stage two build. The majority of us don't necessarily hot rod these motors and there is alot of excess noice attributed to roller rockers so it may not be what alot of the cruiser folks are really looking for. JMO
__________________
'05 FLTRI
'96 FXDL
|
11-18-2010, 12:29 AM
|
|
|
Quote:
Originally Posted by jarhead45
rumor has it that if you got a cam with a .510 lift or greater rollers are a good idea. They keep the valve train straight on a high lift cam. Less wear on the top of the valve due to the roller vs just scraping the top of the valve stem.
|
I think you meant .610 lift.
That's essentially what I've been told. High lift cams or high revving motors. I'm not there yet with my bike. Probably a good thing, harley roller rockers are awfully expensive, compared to sbc.
__________________
Quote:
|
Our ways are not your ways
|
(locogringo 11/25/11)
Thin-wallet bike '07 FLHPI
|
11-18-2010, 01:09 AM
|
|
|
Some don't like roller rockers because they say they're noisey. Just had an SE120R installed which has a .650 lift and I opted for the roller rockers. Oddly enough Harley didn't have roller rockers as a requirement for this build. I must have a good builder, because the engine has less sewing machine sound than my stock motor did.
|
11-18-2010, 01:32 AM
|
|
|
Forums
Quote:
Originally Posted by 1931jamesw
Too bad there isn't one for people who give meaningless replies.
|
Maybe I was too vague for you. Look in the dozen or so Engine tech forums regarding every engine subject you can think of...including Roller Rockers (valve train) if you seriously need advice...and not throwing out a meaningless quip why nobody talks about...
Jeez....do a search man!
__________________
DohaDex
USAF Ret. MSgt "AGE" (78' - 00)
2010 FLHR, Flame Blue/Silver, Cruise, V&H MO, Big Sucker Stg 1, Custom Dynamics LEDs, FM PCV, Redline SP, Mobile 1 V-Twin, Harley Goodies FB Ext., Heritage Style bars, Proud American Legion Rider, Post 356
"... suddenly...commit random acts of coolness..."[SIGPIC]
Last edited by dohadex; 11-18-2010 at 01:43 AM.
|
|
Tags
|
120r, create, eagle, evo, glide, harley, motor, rockers, roler, roller, screamin, screaming, se, stock, street  |
| Thread Tools |
Search this Thread |
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
|
