white85transam

iTrader: (2)

does anyone here run of know anything about rhodes lifters?
http://www.rhoadsproducts.com/Pages/OriginalFT.html

i was told about these and didnt know if they were a good idea or not. i would be using them with my voodoo 60105 hydraulic flat tappet on my 383.

Atilla the Fun

They're not new to me. Since your 383 is over-cammed, you may want to try them. If you like them, you'll know you shoulda used the next-smaller Voodoo cam.

89RS_82Z

iTrader: (2)

you will like them real good for street cars with big cams

white85transam

iTrader: (2)

why do you think this? i am trying to get as close to 500hp as possible that is why i chose this cam. i havent bought it yet but it was my plan to. so i wouldnt know if i chose the right lifters or not. but if i buy the smaller cam and these lifters and i get what i have now which is only 295rwhp i wont be happy. this isnt a car i drive much. i put 3000 miles on it in the past 2 years so it isnt a daily driver. i just like to take it out once in a while on nice days and sometimes venture off to the track.

the cam i have now is a .480/.480 230/230 @.050 and 280/280 and i want something a bit bigger by a good amount. if i go through these changes i want to make sure i do enough to get me where i want to be. i just wish i used a bigger cam the first time.

Rolling Thunder

Well currently i use them in my car. I cant really verify any gains if any as i canged the cam and lifters together. Supposedly they help out the low end when you use a big cam by bleeding down faster in the lowere RPMs but again i cant verify this is actually true. I also have not run them lang enough to give you any actual measure of there reliabilty. The only thing i can say is that they do make a bit of noise as they claim they sound like solid lifters and they do when the car warms up. This can be alittle unnerving if your not used to sounds like comming from your motor.

SpitotRs305

that same style of lifter is sold by most of the big cam MFG. it is in essence a regular hydraulic lifter with some slight moddifications to allow for more rapid pressure relief... they have been around for a while and arent the best thing since sliced bread...

you'll do better to spend your money on the cheaper hyd lifters

i dont think that cam will be to much in a 383... will it lope.. yeah might you want to go to 3.73's maybe hard to tell with the T-5 and how you are used to driving...

but that 383 will tame that cam a good bit now if it was just a 350 that would be a different story

white85transam

iTrader: (2)

ok i plan to eventually move up to 4.10 's but that will be much later i will see how my 9 bolt holds up for now but im sure the t-5 will blow first but only time will tell. i do want it to lope, like i said before its ashame i wasted my time with such a small cam to start but lesson learned. i have a 10.5.:1 cr which the cam calls for just not the gears but that will happen later like i said. and i posted this so i didnt make a mistake and buy something i wont be happy with and apparently people dont seem to like these lifters very much. and i dont want to waste anymore time and money than i already have.

SpitotRs305

that cam isnt that radical that i would be looking for a band aid like those lifters...
like i said 3.27s wont be as harsh as 4.10s but that T-5 isnt going to have a long life either way

white85transam

iTrader: (2)

well i havent updated my sig but i have 3:70's now not the 3:27's but i was told that will be close enough for now.

SpitotRs305

yeah 3.70's will be great... 4.10s will make most of the gears in the T-5 seem pretty much a waste

white85transam

iTrader: (2)

i have had them for a year now and am pretty happy with them so far not too bad i think 80 mph is around 2500 rpm

Atilla the Fun

I didn't read anyone else's. Here's where we left off: you said Voodoo 60105. It has enough duration to make power to 7000 rpm, but it's hydraulic, not solid, so it's done by 6500. Since you're limiting yourself to 6500 by going hydraulic instead of solid, you want your horsepower peak at 6000 rpm. Now, a 383 making 500 by 6000 is no challenge. Go look at AFR's website. Anyway, using a cam any bigger than is needed for this is giving up midrange torque for power you can't use. Can't get. And the issue isn't horsepower, it's acceleration. And that comes from having the most torque possible at the rpm the engine falls to immediately after the upshift. for the 60105 to be anything other than silly, it needs it's LSA to be tightened to like 106 degrees, then it would be a circle-track cam. But on that wide LSA, it's too big for what it is. The Rhoads lifters make a cam behave about 10 degrees smaller. And a 231/239 cam might get you close, though the LSA is still too wide.

SpitotRs305

huh must have missed where the OP asked for your help picking a cam...

white85transam

iTrader: (2)

can you show me what that would do with a 750cfm carb and a head closer to 200 cc on the intake? and also what would happen with the smaller 60104 cam? but i do like the numbers i see already and where the power peaks.


also my flow numbers shoud be close to this:



Intake flow data w/2.02" at 28" of water
LIFT CFM
.100" 63.7
.200 113.9
.300 161.3
.400 201.3
.500 232.0
.600 250.7

Exhaust flow data w/1.60" at 28" of water
.100 57.2
.200 101.0
.300 127.6
.400 152.1
.500 159.5
.600 169.4


i dont know if this helps ona head selection for the program

SpitotRs305

okay here it is with your flow numbers for both cams and a 750cfm carb

white85transam

iTrader: (2)

i dont like how the power level drops so much on it. i didnt see the one with the smaller cam but i dont think it will be any better do you? i plan to use 1.6 rockers and victor jr intake how much will that help?

i wish i had a program like that i would be playing with that all day

white85transam

iTrader: (2)

i also noticed this setup drops my power level around 5500-6000 just like the cam i have now although it does make more power by about 60 hp i would like to gain a little more than that though. i was happy with the first numbers. any suggestions?

Kevin91Z

iTrader: (1)

Ditch the old-school antique flat-tappet setup and go with a hydraulic roller cam with better ramps and more lift, and you'll be much closer to your horsepower goal. And you wont have to worry about wiping a cam lobe with such an aggressive profile.

Just my opinion.

white85transam

iTrader: (2)

can someone give me a total cost and a descent cam for a retro fit roller set up that will meet my hp goal?