hyd. vs hyd.roller cam?
#611018
02/11/10 11:54 PM
02/11/10 11:54 PM
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Joined: Feb 2009
Posts: 54 ca,us
1hirschdalemopar
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I am putting together a rb motor ,4.250 crank,7.100 rods,0 deck,eddy heads (with light bowl work,gasket match and race valve job),10.5 to 1 comp. and I was thinking of running the comp.xe295hl cam but I was thinking about a hyd roller as well.I am looking for a nasty idle but still be streetable,(mostly a street car)And low maintance(basicly the most power I can get for a street driven car).I live in a rural area so I have to drive the highway to get anywhere,but anyway here is the cam specs. I was thinking of Roller comp.xr292hr dur. .050 242 248 lift .549 .544 110 lobe valve timing at .006 lift int. open 15 close 47 ex. open 58 close 10 xe295hl hyd dur. .050 251 257 lift 564 564 110 lobe valve timing at .006 lift int. open 42 close 74 ex. open 88 close 40 I dont get the valve timing thing,but which one do you guys think would be better for a nasty idle and best power and live a long time on the street or is there a better choice than either one of these?Basicly I was wondering if the hyd. roller would make more hp. and tq.than a flat tappet hyd. cam and last on the street.Thanks guys
superbee
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Re: hyd. vs hyd.roller cam?
[Re: 1hirschdalemopar]
#611019
02/12/10 12:06 AM
02/12/10 12:06 AM
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Joined: Feb 2009
Posts: 54 ca,us
1hirschdalemopar
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Quote:
I am putting together a rb motor ,4.250 crank,7.100 rods,0 deck,eddy heads (with light bowl work,gasket match and race valve job),10.5 to 1 comp. and I was thinking of running the comp.xe295hl cam but I was thinking about a hyd roller as well.I am looking for a nasty idle but still be streetable,(mostly a street car)And low maintance(basicly the most power I can get for a street driven car).I live in a rural area so I have to drive the highway to get anywhere,but anyway here is the cam specs. I was thinking of Roller comp.xr292hr dur. .050 242 248 lift .549 .544 110 lobe valve timing at .006 lift int. open 15 close 47 ex. open 58 close 10 xe295hl hyd dur. .050 251 257 lift 564 564 110 lobe valve timing at .006 lift int. open 42 close 74 ex. open 88 close 40 I dont get the valve timing thing,but which one do you guys think would be better for a nasty idle and best power and live a long time on the street or is there a better choice than either one of these?Basicly I was wondering if the hyd. roller would make more hp. and tq.than a flat tappet hyd. cam and last on the street.Thanks guys
P.S.The car is a 69 superbee,auto trans ,thinking of a tight 3,500 stall convertor,3.55 gears or maybe 3.90s with a gearvendor,tti 1.7/8 headers eddy rpm intake.Thanks again
superbee
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Re: hyd. vs hyd.roller cam?
[Re: 1hirschdalemopar]
#611021
02/13/10 01:02 AM
02/13/10 01:02 AM
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Joined: Apr 2005
Posts: 178 Tidewater, VA
TMCCuda
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This post might get more attention in Unlawfl's Race section.
While I am not arguing that a hyd. roller is better, I think that there are added expenses, like machining for the link bars, and oiling system mods needed to run hyd. rollers on an RB.
Can anyone else enlighten us about Hydraulic roller cams in RB motors?
I always seem to be reading that the body of some hyd. roller lifter brands get exposed during the cam cycle causing oil pressure loss.
This reminds me I need to read the cam section of AndyF's book....BRB.
1970 Plymouth Barracuda
1994 Ram 1500 4x4 5.2L
2004 Ram 1500 4x4 5.7L Quad Cab
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