Hyd roller cam with a solid lifter

93cobra1928 · 04-02-2010, 05:55 PM

I was talking with a buddy the other day about this and he says it will extend the RPM range doing this. He got this info from a machinist named Tommy in Birmingham. I could see doing this in a non roller block to keep from buying the conversion lifters but I'm skeptical of the perfprmance benefit.

Post up your opinion on this

coupe · 04-02-2010, 09:23 PM

I would agree...especially with the right hydraulic roller (ie: something fairly aggressive). The solid allows a bit more precise control of the valve actuation and events. Lash changes would allow a somewhat "tunable" cam too. Same advantages would apply, even if they're technically "hydraulic" lobes.

And Tommy Sadler is probably the gentleman. Been doing this stuff for a while so I would probably take his word for it. He builds engines too, not just a machinist.

93cobra1928 · 04-03-2010, 07:15 AM

Tommy Sadler is his name, my oldtimers was kicking in.
The discussion was about agressive ramp rates on the hyd roller and using it in an older block.

I wonder if there would be an oiling concern on a roller block due to the extra height of the lifter bore?

coupe · 04-03-2010, 08:47 PM

Sure oiling is of concern... the lifter still feeds the pushrod and rocker arms.

Have to make sure the lifter oiling passage intersects the oil passage in block.

waypastcrazy · 04-04-2010, 10:00 PM

Can be done as long as the cam is billet. There were some comp cams that got out that were not billet in the late 90s I believe. And they caused some dipping on the cam lobes. Which cause some serious issues that are hard to chase down if you don't know what the symptoms are. Lol.

03slobra · 04-06-2010, 08:15 PM

this may sound stupid but what about hyd. lifters with a solid roller cam and solid roller valve springs.or hyd. cam and lifters with solid roller valve springs,just curious

93cobra1928 · 04-07-2010, 05:00 AM

I don't think a hyd lifter will stand up to the pressure of a
spring for a solid roller shaft. That would eliminate the "cushion"
provided in the lifter and lead to failure IMO

coupe · 04-07-2010, 09:30 AM

correct.

Seen some high-rev hydraulic setups use springs that were over 200# on the seat, and that's starting to get into the solid realm...but the spring-rate and open pressure also plays a big factor. The lifters for these are usually heavily modified.

EHardy1971 · 04-07-2010, 03:48 PM

I remember seeing an article in MM&FF back years ago, about making a stock hydraulic roller lifter "Semi-solid", by taking them apart, and stacking washers inside of them. It was supposed to do the same thing.

04-02-2010, 05:55 PM	#1
93cobra1928 Dazed and Confused Join Date: Mar 2009 Location: Northport, Al Posts: 778	Hyd roller cam with a solid lifter I was talking with a buddy the other day about this and he says it will extend the RPM range doing this. He got this info from a machinist named Tommy in Birmingham. I could see doing this in a non roller block to keep from buying the conversion lifters but I'm skeptical of the perfprmance benefit. Post up your opinion on this __________________ Proud owner of 93 Cobra #1928 306ci Forged flat tops, Windsor Sr iron heads, FMS X-303 cam, OE Cobra upper and lower, 65mm tb, 70mm maf, 24lb injectors, BBK shorties, Summit H-pipe and Flo-bastards

04-02-2010, 09:23 PM	#2
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	I would agree...especially with the right hydraulic roller (ie: something fairly aggressive). The solid allows a bit more precise control of the valve actuation and events. Lash changes would allow a somewhat "tunable" cam too. Same advantages would apply, even if they're technically "hydraulic" lobes. And Tommy Sadler is probably the gentleman. Been doing this stuff for a while so I would probably take his word for it. He builds engines too, not just a machinist. __________________ " If you can't explain it simply, you don't understand it well enough. " - Albert Einstein

04-03-2010, 07:15 AM	#3
93cobra1928 Dazed and Confused Join Date: Mar 2009 Location: Northport, Al Posts: 778	Tommy Sadler is his name, my oldtimers was kicking in. The discussion was about agressive ramp rates on the hyd roller and using it in an older block. I wonder if there would be an oiling concern on a roller block due to the extra height of the lifter bore? __________________ Proud owner of 93 Cobra #1928 306ci Forged flat tops, Windsor Sr iron heads, FMS X-303 cam, OE Cobra upper and lower, 65mm tb, 70mm maf, 24lb injectors, BBK shorties, Summit H-pipe and Flo-bastards

04-04-2010, 10:00 PM	#5
waypastcrazy ADDICTED TO SMALL BLOCKS Join Date: Jan 2007 Location: lookout mt Posts: 1,757	Can be done as long as the cam is billet. There were some comp cams that got out that were not billet in the late 90s I believe. And they caused some dipping on the cam lobes. Which cause some serious issues that are hard to chase down if you don't know what the symptoms are. Lol. __________________ http://alabamaopencarry.com/forum/index.php One of StreetStangs class clowns! Status:slow as hell! NORTH EAST ALABAMA STANGS

04-06-2010, 08:15 PM	#6
03slobra Senior Member Join Date: Nov 2006 Posts: 488	this may sound stupid but what about hyd. lifters with a solid roller cam and solid roller valve springs.or hyd. cam and lifters with solid roller valve springs,just curious __________________ Preston 1947 mercury 2door coupe 331w/tko 600 project 2003 f350 5in lift 6.0 with upgraded stuff!!!

04-03-2010, 08:47 PM	#4
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	Sure oiling is of concern... the lifter still feeds the pushrod and rocker arms. Have to make sure the lifter oiling passage intersects the oil passage in block.

04-07-2010, 05:00 AM	#7
93cobra1928 Dazed and Confused Join Date: Mar 2009 Location: Northport, Al Posts: 778	I don't think a hyd lifter will stand up to the pressure of a spring for a solid roller shaft. That would eliminate the "cushion" provided in the lifter and lead to failure IMO __________________ Proud owner of 93 Cobra #1928 306ci Forged flat tops, Windsor Sr iron heads, FMS X-303 cam, OE Cobra upper and lower, 65mm tb, 70mm maf, 24lb injectors, BBK shorties, Summit H-pipe and Flo-bastards

04-07-2010, 09:30 AM	#8
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	correct. Seen some high-rev hydraulic setups use springs that were over 200# on the seat, and that's starting to get into the solid realm...but the spring-rate and open pressure also plays a big factor. The lifters for these are usually heavily modified.

04-07-2010, 03:48 PM	#9
EHardy1971 Trunk Monkey Join Date: Jun 2007 Location: Home Posts: 5,708	I remember seeing an article in MM&FF back years ago, about making a stock hydraulic roller lifter "Semi-solid", by taking them apart, and stacking washers inside of them. It was supposed to do the same thing. __________________ Eric 89 LX Coupe-Juiced 01 Lightning-Boost 06 TBSS