Rero fit roller cam & lifters into early block?

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vgv8

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http://www.hughesengines.com/Index/...earch=5321&searchmode=partnumber&partid=26114

Just wondering if anyone out there is running this type of setup or if anyone has opinions on them. I would like to fit them to an early seventies 318 for the following reasons: I like the idea of no cam break in, no worries about the zinc level in oils, the faster ramp rates compared to non-rollers and higher power potential. Jump in good or bad, maybe they wont make extra power in mild builds etc... let me know whether you think its worth the extra cost!
 
These are the same lifters I have in my 340. They are a drop in lifter, just know that you will have to open up the Pushrod holes so you can get the correct angle for the lifters. I also recommend that you either get a set of adjustable 273 rocker or a set of roller rockers (I have a set of comp pro mag roller rocker on the motor).
You'll need to be using a roller cam, just make sure that roller cam has a cast iron intergrated gear on it, otherwise you'll be using a broze year and will be ripping the motor back apart in about 3000 miles. I got my cam from crane because it has a cast iron gear on it and I run a hardened intermiate shaft.
 
They looks nice for moderate power levels, but take note of the maximum spring pressure (160 closed & 380 open). These are NOT heavy duty rollers...as long as you know that and plan accordingly you should be fine.
 
flyfish said:
They looks nice for moderate power levels, but take note of the maximum spring pressure (160 closed & 380 open). These are NOT heavy duty rollers...as long as you know that and plan accordingly you should be fine.
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Not trying to dispute you--I ran some PSI springs in testing for my 2010 EMC 367 at 220 lbs on the seat and just under 700 open with those lifters! Of course I only made 35 pulls on the dyno but I was really impressed-a stethoscope on the v-covers and it sounded like a sewing machine.Oh and nothing changed when I went to a PAC beehive with a much lower rate. Just thought I'd share that-as I figured it was not going to workout at all--but it did. J.Rob
 
RAMM said:
Not trying to dispute you--I ran some PSI springs in testing for my 2010 EMC 367 at 220 lbs on the seat and just under 700 open with those lifters! Of course I only made 35 pulls on the dyno but I was really impressed-a stethoscope on the v-covers and it sounded like a sewing machine.Oh and nothing changed when I went to a PAC beehive with a much lower rate. Just thought I'd share that-as I figured it was not going to workout at all--but it did. J.Rob
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Good to know, I was just regurgitating what was on Hughes site about the spring pressure.
 
Thanks for the replies on this one. I can't find the spring pressures for the roller cams on Hughes' website but I'm sure they will point me in the right direction if I do go ahead with this idea. Thanks
 
Its nice not to have to worry about cam break in that is for sure. When I did mine with Crane retrofit rollers I ran the oil pump with a drill and turned the engine over by hand to make sure no excessive oil bleed out at max lift. I had some so went with a custom ground roller with smaller base circle cam so lifters would ride lower in bores. I hear the Hughes lifters fit better but I would check it anyway.
 
Most of the off the shelf HR cams are not ground on a billet(steel) core, so a std dist drive is good.
I even have a Comp 20-740-9 in here now, its a solid roller cam and it is not on a billet(steel) core, so a std dist drive gear is fine on that as well.

If your not sure, call and ask the cam company and they will tell you.
 
Be careful about the chamfered lifter bores. I found out the hard way. My oil ring was exposed upon full lift. These were with the COMP 8920 lifters. Hughes are on the way and hopefully wont have this issue.
 
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