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| Anyone Interested in 1.6 Roller Rockers? https://slantsix.org/forum/viewtopic.php?t=57398 |
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| Author: | Landons65Dart [ Mon Mar 30, 2015 1:47 pm ] |
| Post subject: | Anyone Interested in 1.6 Roller Rockers? |
I'm doing some all around research on rockers for different engines for material types, bearing types and what not to piece together my own creation for roller rockers for the slant. However, if I'm going to do this, I'll need to know that there's demand. Would anyone be interested in purchasing a set (12) of 1.6 roller rockers for their slant? I know it's not a high RPM motor to require rollers, but it's a simple friction reduction that improves stability of the valvetrain. Goal selling price is $500, but I'll need to see quite a bit of interest to make enough sets to accomplish that goal. I have access to all the necessary equipment and CNC machinery as well as CAD and SolidWorks design programs. I will also run functionality and durability tests on the rockers, so no worries there. Just making sure there is enough interested people out there to even begin this project. |
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| Author: | Dart270 [ Tue Mar 31, 2015 5:34 am ] |
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You might check and see if Rocker Arm Specialists are still making their roller 1.6 or 1.5 sets. The last sets a bunch of us ordered had too thin a wall on the rocker bar and caused binding after bolting them down. The design before that did not have sufficient oil passages to allow sustained street use. I gather the more recent set has had the oiling redesigned and is OK for street use, but I'm not sure. If you can make something that solves these problems and allows real street use for $500, I would bet you'll have some takers. I would most likely buy a set. Lou |
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| Author: | USAJon [ Tue Mar 31, 2015 7:23 am ] |
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what's the real time benefit on roller rockers other then the bigdick $$$ factor, HP gain ?????????? |
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| Author: | ProCycle [ Tue Mar 31, 2015 7:31 am ] |
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I'd be very interested in some 1.6 rockers but my understanding is that bushings are generally superior for parts that have a relatively small back and forth motion. I would also be skeptical that a stock rocker shaft is hard enough to serve as the inner race for a needle bearing. |
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| Author: | slantzilla [ Tue Mar 31, 2015 8:13 am ] |
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Quote: what's the real time benefit on roller rockers other then the bigdick $$$ factor, HP gain ??????????
It will make your wallet $500 lighter so you should in theory, go faster.Seriously, I ran my 1.6 RAS back-to-back against stock rockers on the red car. 0 difference. A 1.6 ratio will help a little on a motor that is under cammed. They will also help if you have lots of spring pressure and are killing stock rockers. |
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| Author: | Charrlie_S [ Tue Mar 31, 2015 9:50 am ] |
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T&D still has these available. Not inexpensive at $730 but T&D has a good reputation. |
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| Author: | CNC-Dude [ Tue Mar 31, 2015 10:19 am ] |
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I did this about a year ago. There is no interest in it. I already have done all the 3D modeling and stress analysis testing as well. I can do them billet or have an extrusion die made. I've already gotten quotes on getting a die made. <img src="http://imagizer.imageshack.us/v2/280x200q90/661/Lv6VkA.jpg" border="0"> |
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| Author: | Dart270 [ Tue Mar 31, 2015 10:50 am ] |
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Yes, without a tested product, you can be sure there will be no interest. Someone needs to build one, run it on a couple of engine combos (street, strip at least), and then sell copies. Yes, this will be a significant outlay of resources for someone who is already an enthusiast and will likely make it anyway for themselves. Best, Lou |
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| Author: | USAJon [ Tue Mar 31, 2015 10:59 am ] |
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hey where are the fabricators remove the stock rocker shaft assembly replace with a steel bar same length say 3/4 thick mill correctly holes for mount say counter sunk cut, then drill correctly spaced 7/8 threaded holes buy chevy 7/8's rocker studs/ roller rockers correctly spaced on the rear oil supply fabricate an oil line that drips oil on rockers. done. |
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| Author: | ProCycle [ Tue Mar 31, 2015 11:46 am ] |
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Quote: buy chevy How would you oil them?Don't the Chevy rockers get oil up through the pushrods from the hydraulic lifters? |
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| Author: | Landons65Dart [ Tue Mar 31, 2015 12:09 pm ] |
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So by saying you noticed no difference, I'm assuming you had your engine dyno'd before and after installment? If not, then your statement is pure opinion. I want cold hard facts, and to get those, I'll have to do this myself. I did state I would test them as well. I'm not asking people to pre purchase. I'm just asking if it's even worth the effort. That's all I'm asking. I've thought this out thoroughly and wouldnt even give something away that I wouldn't use myself. I don't need people's opinions on what they would do. I just wanted simple answers. I'm okay with questions, that's fine. Please stop with the bogus opinion based shots. Regardless, I'm doing this for myself. If you don't want them, fine by me. Makes mine that much more of a one off build. As for the shaft, that's nothing that chromoly tubing and machining can't fix. And again, these will be completely custom for the slant. Not rockers from other motors. The biggest problem faced with stock rockers is the difference in ratio allowing for uneven A/F ratios across the cylinders, as if the head and intake's designs didn't have flaws already. If anyone is like me, They want to squeeze every bit of potential out of their slant. I'm reaching for the stars and trying to accomplish 800 hp. Now, 30+ psi would probably counter for insufficient valve lift, but if the lift is different between cylinders, pressures will be different along the intake also causing inconsistent A/F ratios. You may say that rollers are unnecessary for a low RPM engine such as the slant, but what if it achieves just a hair more RPM range? I don't even have to assemble it on the slant to prove that friction will be reduced on the vakve stems. |
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| Author: | USAJon [ Tue Mar 31, 2015 12:38 pm ] |
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Quote: Quote: buy chevy How would you oil them?Don't the Chevy rockers get oil up through the pushrods from the hydraulic lifters? |
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| Author: | Doctor Dodge [ Tue Mar 31, 2015 7:35 pm ] |
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| Author: | slantzilla [ Wed Apr 01, 2015 12:42 am ] |
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Landon, my testing was done on a dragstrip. |
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| Author: | Dart270 [ Wed Apr 01, 2015 3:06 am ] |
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Thanks for your interest, Landon. There would be some market, but we are not sure how big. For me, the primary advantage would be durability in long (30 min to 15 hrs) road course running, with some small HP advantage. Hot engine and sustained running = rocker tip wear on the valve end. From my testing (dragstrip, but not back to back on same day), I feel like you will not see much HP gain for most engine combos compared to stock rockers. I'm sure you will be able to see a measurable gain on a dyno or more gains with certain engine combos. The 225 does not appear to need gobs of lift to make good power, according to data I have collected from several advanced builders/racers. There is always room to explore! Thanks, Lou |
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