7,000+RPM drop in hydrualic roller lifters?

[Pure Stock]

Anybody have any experience with hydraulic roller lifters that will handle 7,000 rpm+? I understand cam lobe profile/ramp rate also play an essential part in contributing to valve/lifter float.

Been doing some research and found these names Morel, Eaton, Sherman. Any experience with these manufacturers?

[gmkillr]

I thought that eaton made the fms crane, & com cams lifters, but comp cams takes their's and adds a better spring & plunger to handle the rpm better, the comp cam lifters are suppose to be the best of the 3. They are suppose to be good to 7500 according to Jay Allen.

[coralcoupe1993]

Anybody have any experience with hydraulic roller lifters that will handle 7,000 rpm+? I understand cam lobe profile/ramp rate also play an essential part in contributing to valve/lifter float.

Been doing some research and found these names Morel, Eaton, Sherman. Any experience with these manufacturers?

No. I was spinning a 408 to about 6800. I ran solids. Call Anderson Motorsport. I think they have a high RPM hyd combo????????

[Killercanary]

I'm running eaton's in my car Joe, but I don't see anywhere near the rpms you are talking about. I know these lifters are the same used in some pure street combos, but like you said, a lot has to do with the cam profiles.

[Pure Stock]

I'm running eaton's in my car Joe, but I don't see anywhere near the rpms you are talking about. I know these lifters are the same used in some pure street combos, but like you said, a lot has to do with the cam profiles.

Anything on the Morels??

[coralcoupe1993]

Anything on the Morels??

Who is grinidng your cam? Did they recomend any type of lifter? I am assumeing that 7000+ you are not using an off the shelf cam.

[Pure Stock]

Who is grinidng your cam? Did they recomend any type of lifter? I am assumeing that 7000+ you are not using an off the shelf cam.

On the contrary, it is an off the shelf bump stick I am just wanting something with a little *cushion*;)

[Balaska347]

I run the FMS lifters with anderson high rev springs and retainers with his custom cam and Rick Anderson said I am good for over 7000, but I still have the stock rev limiter of 6250 so I never tried yet.

[Killercanary]

Joe, I'm not familiar with Morels, but my dad still runs the stock lifters in his car an he has made pulls to 7000rpm without any hint of valve float or lifter problems. It doesn't make power up there, but we did it to make sure that we had eliminated an ignition problem.

I know you have had unusual success with your OTS cam, and it may very well be the best fit for your combo, but I can't help but to imagine what a custom cam might do for you too. Have you thought about it?

[Stangman701]

I ran the comp cams XE274 with comp cam lifters and they didn't get anywhere near 7000 rpm cleanly. There wan't much visually different between them and stock lifters that I could see. I had them both apart, but didn't really compare the internals to see if they were different. If you find something that works let us know. My motor feels like it wants to go past 6500 so bad, but it just floats the valves

[Pure Stock]

Joe, I'm not familiar with Morels, but my dad still runs the stock lifters in his car an he has made pulls to 7000rpm without any hint of valve float or lifter problems. It doesn't make power up there, but we did it to make sure that we had eliminated an ignition problem.

I know you have had unusual success with your OTS cam, and it may very well be the best fit for your combo, but I can't help but to imagine what a custom cam might do for you too. Have you thought about it?

Paul, Oh I think about it, probably more often than I really should. LOL! Well, I won't disclose any names but one of the "custom cam guys" and I had a lengthy conversation one evening a while back about my combo. As I started to reveal some of my parts to him he stops me mid sentence and asks me the static c.r. I'll tell him, "You know 9:1" He then says to me what's the best time it has run. I tell him and there is a 5 sec. pause. I thought the call dropped. He finally responds and says "Say that again" So I say 11.36 He then tells me we need to put more rpm in it. How much I ask? Shift points would check in @ 7,200. I think about it for a moment and then I think about those tiny 5/16" rods bolts. Ahh, let's make this a 6,500 peak power cam with shifts @ 6,700-6,800 TOPS. He then proceeds to tell me I need to switch from a hydraulic roller to a flat tappet roller. See, I like the hydraulic roller "set it and forget it" deal Second disagreement. He then tells me he is going to do some "calculations" and get back to me in 2-3 days. Well, 2 weeks pass by and no call. At this point I'm saying screw this I'll make thos OTS cam work no matter what LOL!! I finally get in contact with the "cam guy" and you know what he says to me Paul? I can't help you make any more power that will be justified with you spending the amount of money it will cost. I appreciated the honesty, but I did not appreciate the backburner ideaology. I'd never purchase a cam from this individual because of that. May sound harsh, but hey just because he couldn't help me out in this instance does not mean he couldn't help me out in another. 1 cam guy down 2 to go:D

[gmkillr]

7200??????????????
On a stock block, rods, & pistons????

[coralcoupe1993]

On the contrary, it is an off the shelf bump stick I am just wanting something with a little *cushion*;)

Nice!!!

[somethingclever]

For a car that only sees track duty (i'm assuming) I don't understand the point of keeping the hydraulic setup. I don't have any personal experience with how often the solid's need adjusted...but from everything I've read and everyone i've talked to...it's NOT that often (15-20k street miles). A good set of valve springs (i think you already have those, correct?) will keep the lifter from floating off the cam...and the solid design will keep the lifter from collapsing at high rpms like the hydraulic's do. I understand wanting to set it once and be done....but how often does one run the same setup...especially on a track only type car? How long has your current cam been in? :D

[Pure Stock]

For a car that only sees track duty (i'm assuming) I don't understand the point of keeping the hydraulic setup. I don't have any personal experience with how often the solid's need adjusted...but from everything I've read and everyone i've talked to...it's NOT that often (15-20k street miles). A good set of valve springs (i think you already have those, correct?) will keep the lifter from floating off the cam...and the solid design will keep the lifter from collapsing at high rpms like the hydraulic's do. I understand wanting to set it once and be done....but how often does one run the same setup...especially on a track only type car? How long has your current cam been in? :D

John, The main reason I did not want to make the switch was because of $$$. And then when you factor in the gain *if* there is any gain. New lifters, cam, pushrods, springs, titanium retainers, and locks would have put me near $750.00

There are guys turning some big rpm with the hydraulic roller set-up. I just need to find the correct lifter and or modify them so that they are able to withstand the rpm. I've had this cam in for a while and I like the characteristics it offers. When a combo is at the point this one is, it can be difficult to find less e.t. in it. I have seen combinations that make more power and run slower times. That's another factor that makes me want to stick to what I have and just *improve* what I currently run. May sound backwards in todays racing world where people chase HP and not necessarily efficiency. I understand your point you made above, and I may just have to resort to that *if* I cannot keep the lifter on the cam. I have a few options before that is considered though.

Joe

[somethingclever]

I mis-interpreted your original post...i thought you were changing cams too. If you're just looking to changing out the lifters...then I understand the reason for staying hydraulic.

Looking forward to seeing this yr's results with your car;

[Balaska347]

I say if it isn't broke don't fix it joe. How much Hp do you think you will get from switching to a custom cam, not that much if any. I run a custom cam but I was building a new engine combo so I needed a new cam anyways.

[04yellowcobra]

I will watch your research Joe, as I will be running stock or FMS. But I know someday I will want to turn up the wick. Hopefully I will see you out at Cecil sometime this year.

Later
Jason

[coralcoupe1993]

I want the next motor in my notch to rev over 7k!!!! I think I am going to do a 351? No2???

[Pure Stock]

I want the next motor in my notch to rev over 7k!!!! I think I am going to do a 351? No2???

Colin, Just talked to a friend over at T.E.A. in Ohio. He relayed to me that a customer of his just put together a Dart block based 428 c.i.d. N/A stroker that made 615 RWHP. Peak power came in at 6,800. Shift rpm around 7,200ish. EFI Super Victor intake with a CHP elbow, 105mm T.B. That c.i.d. is accomplished using a 4.125" bore and a 4.0" stroke. And to round it off it made that power on pump gas!!! That's over 700 FWHP from a TFS Highport cylinder head and it peaks under 7,000 rpm.