Roller Cam and Lifters

Performance mods and Advanced Stroker discussion.
Post Reply
scalper
Making Progress
Making Progress
Posts: 61
Joined: June 20th, 2009, 9:07 pm
Stroker Displacement: 4.7l
Vehicle Year: 1996
Vehicle Make: jeep
Vehicle Model: cherokee
Location: santa fe tx

Re: Roller Cam and Lifters

Post by scalper »

junk ..pure junk.505 did hardly any r and d work before marketing this to the public.i bought a 505 roller when they first came out in 09 and went through a laundry list of problems .basicly the cam cores are not hard enough and fail.also the chessy linkbar failed on me also.i also had many other problems but I don't feel like typing all of it lol.
jeepxj3
Movin on up ^
Movin on up ^
Posts: 370
Joined: December 5th, 2013, 1:55 am
Stroker Displacement: 4.6
Vehicle Year: 1998
Vehicle Make: jeep
Vehicle Model: xj

Re: Roller Cam and Lifters

Post by jeepxj3 »

Interesting, any more details?

The cam hardness/failure could be due the heavier valve springs of the kit. Any valve spring values? Seat and lift pressures?
Some of the hardness issue could be fixed with nitriding the cam.

Link bar failure, that's a new one. Any pics of a good one and the failed one?
User avatar
SilverXJ
Global Moderator
Global Moderator
Posts: 5789
Joined: February 14th, 2008, 7:14 am
Stroker Displacement: 4.6L
Vehicle Year: 2000
Vehicle Make: Jeep
Vehicle Model: Cherokee
Location: Radford, Va

Re: Roller Cam and Lifters

Post by SilverXJ »

The lack or cam lobe longevity is due to running a performance roller grind on a blank meant for a flat tappet. The roller lobe profile necessitates a spring with a higher load. In this case it is a cast blank that won't hold up to those loads. Nitriding won't help. This is without the problems typical of 505.
jeepxj3
Movin on up ^
Movin on up ^
Posts: 370
Joined: December 5th, 2013, 1:55 am
Stroker Displacement: 4.6
Vehicle Year: 1998
Vehicle Make: jeep
Vehicle Model: xj

Re: Roller Cam and Lifters

Post by jeepxj3 »

But what about running the roller lifter with a 'stock' cam or a mild flat tappet profile cam?

We don't know what 'profile' was on the 505 supplied cam. It could have been a more aggressive 'roller' profile or just a 'flat tappet' profile with more lift and duration.

I would like to see roller lifters on a stock cam with near stock valve springs and on a Comp 231 cam with MP equivalent springs.
NO aggressive 'roller' profile cam requiring super heavy valve springs and NO valve spring heavier than a MP equivalent.
User avatar
SilverXJ
Global Moderator
Global Moderator
Posts: 5789
Joined: February 14th, 2008, 7:14 am
Stroker Displacement: 4.6L
Vehicle Year: 2000
Vehicle Make: Jeep
Vehicle Model: Cherokee
Location: Radford, Va

Re: Roller Cam and Lifters

Post by SilverXJ »

You can't put roller lifters on a stock cam for a flat tappet. There is a bevel on the lobe to help the lifters rotate.

Roller profiles are quite a bit different than flat tappet profiles and the two are not compatible. There would also be no point to run a roller with a flat tappet profile as here would be no benefit.
jeepxj3
Movin on up ^
Movin on up ^
Posts: 370
Joined: December 5th, 2013, 1:55 am
Stroker Displacement: 4.6
Vehicle Year: 1998
Vehicle Make: jeep
Vehicle Model: xj

Re: Roller Cam and Lifters

Post by jeepxj3 »

OK, so you would have to have the 'stock' or 231 profile, lift and duration and ramp rate, ground 'flat' with no 'bevel'.

I don't think that the only advantage to a roller lifter conversion would be the more aggressive ramp rates for the same lift and duration. There would be the lower friction, lower heat, less wear, maybe more economy and quieter/smoother engine.
KenoshaComanche
Where's the "any" key?
Where's the "any" key?
Posts: 23
Joined: January 5th, 2016, 9:55 pm
Stroker Displacement: 242
Vehicle Year: 1988
Vehicle Make: AMC Jeep
Vehicle Model: Comanche

Re: Roller Cam and Lifters

Post by KenoshaComanche »

I'm on summit trying to find some AMC Big Block solid roller lifters i can modify like mentioned earlier in the posts. Does anyone know a part number or what exact motor to look under? I'm not very familiar with AMC other than the jeep stuff.
User avatar
SilverXJ
Global Moderator
Global Moderator
Posts: 5789
Joined: February 14th, 2008, 7:14 am
Stroker Displacement: 4.6L
Vehicle Year: 2000
Vehicle Make: Jeep
Vehicle Model: Cherokee
Location: Radford, Va

Re: Roller Cam and Lifters

Post by SilverXJ »

Where are you getting the roller cam from?
KenoshaComanche
Where's the "any" key?
Where's the "any" key?
Posts: 23
Joined: January 5th, 2016, 9:55 pm
Stroker Displacement: 242
Vehicle Year: 1988
Vehicle Make: AMC Jeep
Vehicle Model: Comanche

Re: Roller Cam and Lifters

Post by KenoshaComanche »

SilverXJ wrote:Where are you getting the roller cam from?

LSM systems engineering

http://www.lsmeng.com/
jeepxj3
Movin on up ^
Movin on up ^
Posts: 370
Joined: December 5th, 2013, 1:55 am
Stroker Displacement: 4.6
Vehicle Year: 1998
Vehicle Make: jeep
Vehicle Model: xj

Re: Roller Cam and Lifters

Post by jeepxj3 »

LSM Lifter Bushings might work if they can machine them for the Jeep block. Press in fit with lifter guide groove. That would be cool.

Can LSM make a billet cam at a reasonable price?
KenoshaComanche
Where's the "any" key?
Where's the "any" key?
Posts: 23
Joined: January 5th, 2016, 9:55 pm
Stroker Displacement: 242
Vehicle Year: 1988
Vehicle Make: AMC Jeep
Vehicle Model: Comanche

Re: Roller Cam and Lifters

Post by KenoshaComanche »

Ide like to use the lifters that were mentioned earlier as I can wire edm a set of link bars made of something I won't have to worry about wearing out or anything. Also lsm said they have cores in stock and ready to grind. I didn't get a price though. I'm gonna have to eat whatever it'll cost cause I've already broke my cast lunati cam running my crower solid flat tappet lifters after I left off the throttle running it at the strip.. Went through the lights at about 6900rpm..
jeepxj3
Movin on up ^
Movin on up ^
Posts: 370
Joined: December 5th, 2013, 1:55 am
Stroker Displacement: 4.6
Vehicle Year: 1998
Vehicle Make: jeep
Vehicle Model: xj

Re: Roller Cam and Lifters

Post by jeepxj3 »

NICE, 6900 RPM. That's really pushing the boundaries.
User avatar
SilverXJ
Global Moderator
Global Moderator
Posts: 5789
Joined: February 14th, 2008, 7:14 am
Stroker Displacement: 4.6L
Vehicle Year: 2000
Vehicle Make: Jeep
Vehicle Model: Cherokee
Location: Radford, Va

Re: Roller Cam and Lifters

Post by SilverXJ »

KenoshaComanche wrote:I didn't get a price though. I'm gonna have to eat whatever it'll cost cause I've already broke my cast lunati cam running my crower solid flat tappet lifters after I left off the throttle running it at the strip.. Went through the lights at about 6900rpm..
I'd be interested to know the price... I doubt its going to be less than $1000.
I6FAN
I made it to triple digits!
I made it to triple digits!
Posts: 172
Joined: March 28th, 2010, 9:31 am
Stroker Displacement: 4.2
Vehicle Year: 1987
Vehicle Make: jeep
Vehicle Model: wrangler

Re: Roller Cam and Lifters

Post by I6FAN »

SilverXJ wrote:
KenoshaComanche wrote:I didn't get a price though. I'm gonna have to eat whatever it'll cost cause I've already broke my cast lunati cam running my crower solid flat tappet lifters after I left off the throttle running it at the strip.. Went through the lights at about 6900rpm..

I'd be interested to know the price... I doubt its going to be less than $1000.


Silver, didn't Mike Jones, aka. CamKing, say he could make one? Seems like I saw a thread over on ST where it was said he could make one for a Ford or Chevy(?). The price was $1000 to $1500.
User avatar
SilverXJ
Global Moderator
Global Moderator
Posts: 5789
Joined: February 14th, 2008, 7:14 am
Stroker Displacement: 4.6L
Vehicle Year: 2000
Vehicle Make: Jeep
Vehicle Model: Cherokee
Location: Radford, Va

Re: Roller Cam and Lifters

Post by SilverXJ »

I6FAN wrote: Silver, didn't Mike Jones, aka. CamKing, say he could make one? Seems like I saw a thread over on ST where it was said he could make one for a Ford or Chevy(?). The price was $1000 to $1500.
Yes, he can. I asked him about one in 2012 when I was purchasing my flat tappet cam from him. "To make a one off custom steel billet for this engine, you'd be looking at around $1,100."
Post Reply

Who is online

Users browsing this forum: No registered users and 16 guests