patra_is_here Posted July 10, 2013 Report Share Posted July 10, 2013 so my car has roller rockers and (i suspect) a stock cam. do the roller rockers affect cam specs, or can I use any cam that I would normally want to use with standard slider rockers? like, if I wanted to run one of tim's cams, would it have to be special in order to work with the roller rockers? Link to comment Share on other sites More sharing options...
psu_Crash Posted July 10, 2013 Report Share Posted July 10, 2013 Using a roller rocker on the stock slipper cam will actually give you less duration. On the stock cam I also highly doubt that your lifter preload is enough. I played around with a few cams, roller and slipper grinds. Also tried 1.5 and 1.6 ration rockers. As far as I have seen it's not possible to "correctly" run roller rockers and get the proper hydraulic lifter preload with the late model (shorter) valves without running some kind of lifter shim. There's more to it but that's the gist of things. It may run fine but you likely aren't getting the most out of it. Link to comment Share on other sites More sharing options...
StarquestRescue Posted July 10, 2013 Report Share Posted July 10, 2013 You should use a roller grind with roller rockers, and the roller cam should be degreeded. But, your car will preform better with a stock cam and rockers Link to comment Share on other sites More sharing options...
patra_is_here Posted July 10, 2013 Author Report Share Posted July 10, 2013 well, i said I suspect its a stock cam. it could be a roller cam. I dont really know the history or how to tell, so any help would be awesome Link to comment Share on other sites More sharing options...
StarquestRescue Posted July 10, 2013 Report Share Posted July 10, 2013 Most cams have markings on one of the ends. Pull it out and look. Link to comment Share on other sites More sharing options...
psu_Crash Posted July 10, 2013 Report Share Posted July 10, 2013 Like SQR said, regrinds I have seen will have specs etched in them. Some also/or have paint markings on them. Maybe you have a setup that's good to go .... But Link to comment Share on other sites More sharing options...
natallica Posted July 10, 2013 Report Share Posted July 10, 2013 (edited) Some info here, copied and pasted from Starquest.i-x.net SOS manuals: Is a ROLLER a ASSET to performance? Only if you have a REAL-DEAL ROLLER PERFORMANCE CAM http://starquest.i-x.net/images/smiles/icon_exclaim.gif That SHORT RADIUS on a ROLLER WHEEL will cheat you outta DURATION TIME/DEGREES. http://starquest.i-x.net/images/smiles/icon_rolleyes.gif And....that ROLLER WHEEL is SPLASH LUBRICATED ONLY http://starquest.i-x.net/images/smiles/icon_exclaim.gif Without a REAL ROLLER CAM PROFILE, YOU BEAT THE s*** OUTTA YOUR ROLLER WHEELS & LOBES http://starquest.i-x.net/images/smiles/icon_exclaim.gifhttp://i35.photobucket.com/albums/d182/Professor-Quest123/Heads/RS-24B.jpg http://i35.photobucket.com/albums/d182/Professor-Quest123/Heads/RS-24BA.jpg -N8 Edited July 10, 2013 by natallica Link to comment Share on other sites More sharing options...
patra_is_here Posted July 10, 2013 Author Report Share Posted July 10, 2013 interesting. Guess i'm gonna have to check the cam sooner or later and see what's up. might explain why it feels a little low on power even at stock boost. Link to comment Share on other sites More sharing options...
Tim_C. Posted July 11, 2013 Report Share Posted July 11, 2013 It won't hurt anything to run the roller rockers, but as others have already said, you lose duration. Certain roller rockers add a bit more lift that some say makes up for the initial loss, but I don't think it is a good idea to put a roller rocker on a non-roller cam for the most part. Now Brian had good success with his performance grind slipper cam and roller rockers, but it was not a stock cam. It depends on the grind characteristics, but generally, a cam ground for roller rockers is needed to get the advantage that the rockers bring. Link to comment Share on other sites More sharing options...
Cloud81918 Posted July 11, 2013 Report Share Posted July 11, 2013 So is the cam that comes on the Magna any good in our engines. I have a full set of rollers and the Magna cam sitting on the shelf. Right now I run slippers with mechanical adjustment. Link to comment Share on other sites More sharing options...
Lizzord30 Posted July 11, 2013 Report Share Posted July 11, 2013 So is the cam that comes on the Magna any good in our engines. I have a full set of rollers and the Magna cam sitting on the shelf. Right now I run slippers with mechanical adjustment.A while back I got some specs on the cam from the magna and it was basicly same specs as the stock slip rocker (when using the rollers) Maybe slightly better then stock because or rollers but no gain in duration or lift Link to comment Share on other sites More sharing options...
Shelby Posted July 14, 2013 Report Share Posted July 14, 2013 stock magna rockers are 1.5 to 1 , useing 1.6 v6 roller rockers give some duration increase and a slight lift increaseeather way you should see a power gain from useing roller rockers if properly set up due to the less turn resistance it makes to the engine , turning the engine by hand there is a noticeable diff in effort required Link to comment Share on other sites More sharing options...
Coke Posted May 4, 2014 Report Share Posted May 4, 2014 Soooo....if running roller 1.6 ratio rockers, a roller cam (such as a Magna) without going crazy with custom grind cams, should be used? Link to comment Share on other sites More sharing options...
Funky Phil Posted May 4, 2014 Report Share Posted May 4, 2014 Id bet most of that "slight" lift increase from the rollers gets absorbed in lifter compression. Has anyone done any REAL roller cam testing? Benefit behind a roller is the better/more aggressive lobe profile that can be had. Slapping it on a slip cam is kinda pointless IMO. Link to comment Share on other sites More sharing options...
scott87star Posted May 4, 2014 Report Share Posted May 4, 2014 I've been running a magna roller on my flatty for a couple of years, as has been said it has the same specs as the stock cam/slipper rocker setup but it does seem a bit smoother. The 1.6 ratio was too high though, it held the valves open enough to give 70% leakdown, I had to switch to the 1.5 roller ratio to make it work. 1 Link to comment Share on other sites More sharing options...
Funky Phil Posted May 4, 2014 Report Share Posted May 4, 2014 I've been running a magna roller on my flatty for a couple of years, as has been said it has the same specs as the stock cam/slipper rocker setup but it does seem a bit smoother. The 1.6 ratio was too high though, it held the valves open enough to give 70% leakdown, I had to switch to the 1.5 roller ratio to make it work. Thats good info. Dod you notice an increase in vacuum? Link to comment Share on other sites More sharing options...
scott87star Posted May 4, 2014 Report Share Posted May 4, 2014 On the factory technica gauge? LOL. Oscar is in the shop now for a makeover so I can't go out and check. Link to comment Share on other sites More sharing options...
stariondreams Posted May 7, 2014 Report Share Posted May 7, 2014 So what is the bottom line 1.6 rockers are no good for stock cam? and what is the direct effect of loss of duration? Link to comment Share on other sites More sharing options...
psu_Crash Posted May 7, 2014 Report Share Posted May 7, 2014 I really need to get my Monsta Banshee roller cam setup in my car one of these years...Maybe I can get that dialed in and have the 284 slipper setup on a rocker assembly ready to switch out quickly on a dyno day for comparison... sounds good but it probably won't happen Link to comment Share on other sites More sharing options...
JohnnyWadd Posted May 7, 2014 Report Share Posted May 7, 2014 Tim_C roller cams still being made? Link to comment Share on other sites More sharing options...
psu_Crash Posted May 7, 2014 Report Share Posted May 7, 2014 To my knowledge he hasn't done a run in years but I can't say for sure. Link to comment Share on other sites More sharing options...
stariondreams Posted May 8, 2014 Report Share Posted May 8, 2014 so is the 1.6 rockers a bad idea with a stock cam? I am thinking of installing a cam and don't know what to go with any suggestions? Link to comment Share on other sites More sharing options...
jszucs Posted May 8, 2014 Report Share Posted May 8, 2014 so is the 1.6 rockers a bad idea with a stock cam? I am thinking of installing a cam and don't know what to go with any suggestions? Yes don't use rollers on a stock cam.... rollers are for roller cams. Link to comment Share on other sites More sharing options...
stariondreams Posted May 8, 2014 Report Share Posted May 8, 2014 I was looking at these last night 284h i was really looking at but wanted to see everyone's feed backhttp://schneidercams.com/hydraulicfollowercamshafts-2.aspx Link to comment Share on other sites More sharing options...
jszucs Posted May 8, 2014 Report Share Posted May 8, 2014 I was looking at these last night 284h i was really looking at but wanted to see everyone's feed backhttp://schneidercams...amshafts-2.aspx That is for regrinding your cam. I guess what are your goals? Have you upgraded everything eles first? It's not going to be like say an LS where you just recam it and the car just wakes up. Link to comment Share on other sites More sharing options...
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