Well just cuz. you did your motor 6 six months ago dont mean you know everything or for that matter anything as it goes the liftes pumping up and causing valve float is just not right and the lifters is not what they change it is the cam lobe (ramp) as they are some time called.Valve float is when your valve springs are not strong enough and the valve starts to bounce off the seat. from high RPMS and also by the weight of valve train componets.by closing the valve slower it helps keep float down.and also by running light weight parts such as Titanium valves and retainers.you know Mass.(weight)Go read some then come back and tell use what you found out then maybe on your next motor.well you will understand.http://www.andersonfordmotorsport.com CLICK ON HIGH REV> CAMS>or you could call ED http://www.flowtechinduction.com click on camshafts the picture of the gray stang with the wheels up is Bill Perkins AKA- Perkey he is the guy I was talking about spinning the motor to 7600+ rpm. Also go do a search on other sites such as http://www.hardcore50.com on how high they rev. stock roller lifters with the custom cam. Also this stuff is not that new they have been doing it for better then 2 years. guess you just missed the boat cuz. you couldnt rev your motor high enough.

 

Thats interesting. http://www.andersonfordmotorsport.co...t/50-cams.html

Wouldnt you think they would rev them up a little higher on the dyno. The only cam that went past 6800rpm is the N-111.

 

go do your reading on other sites like hardcore and see.

 

I cant find the article your talking about on the hardcore site. Send me a link to the article, not just a link to the main site.

 

I have to agree wit uedlose. You can get a roller lifter in either hydraulic or solid form and you can get a flat tappet lifter in solid or hydraulic form. The roller lifters in a 5.0 are hydraulic. The difference between flat tappet and roller is simple. The difference is self explanatory. Roller lifters have a "wheel" or "roller" at the bottom where it rides on the cam and "flat tappet" lifters are flat on the bottom and ride directly on the cam lobe. Here is a picture of roller lifters (notice the wheels at the bottom of each)


These are flat tappet lifters ( you are looking at the bottom of them, notice they are flat, no rollers)


The difference between solid and hydraulic is also self explanitory. "Solid" lifters are exactly that, solid, they are solid and have no give to them so they have to be adjusted precisely and require readjustment every so often. Hydraulic lifters have a spring loaded plunger in them where the pushrod rests on the lifter and oil pressure builds up behind the plunger so that the valve is fairly solid so long as the oil pressure is good.

Here is a cutaway diagram of a hydraulic lifter



Hope I helped a little.

 

its not a article it is racers talking about cams. there is also a formula to figure this all out I cant remember where it is but find it and do the math a renegade car runs 8.80 at 151mph with a 28 in tall tire 3.73 gears with a 306 and they MUST run stock ford roller lifters.do a search on valve float on hard core or on corral net.if you want to know more I am not the one blind to this. I showed you anderson and why dont you E-mail ED talk with him he is the camshaft master not me.I just know what I see hell I was running the wifes car to 7000 rpm with a F-cam and stock lifter with TFS TW heads and a supercharger for a while till I put a smaller pulley on the S/C and was afraid I would over spin it.

 

i love my solid rollers ...rev high...my low lash cam motion cam has .010 valve lash hot ..no noise! the cam i had in my video ,,is in my truck now ,,its runs a lot stronger than my hyd roller....just got to put my 11inch converter back in ,,it was defective ,,got new one ,,than i will go run it ..here some pics of my solid roller set up ...

[IMG]local://upfiles/10419/91794824824048E6AF52B649A2AA6B6E.jpg[/IMG]

 

Hella setup you got there HRM. But we all know youre a rich **** and can afford to build shizz like that. [sm=lol.gif]

 

Yeah I know that. We where discussing the the rev capability of hydrualic roller lifters.

 

not that hi,,,they wimp out ....6500 max ......compared to 8200 rpms ..a was shifting to 7800 rpm in my video!![&:]