1990 la roller 360........cam question

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hollywood hig

hollywood hig

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i have a 1990 360 block roller motor. i'm wondering how big of a cam could i put in thing w/the stock lifter configuration........anyone done this?

i'm looking at a lift range of .525 to .550........
higgs
thanks for the info in advance......
 
I can't say with 100% certainty on this one, but .550" at the valve assuming a 1.5:1 rocker would translate to a .367" lobe lift, and I can't see that as being an issue with the stock type lifters unless the ones you have are shot or if you don't have enough spring to hold them on the lobe.

Can you up the rocker ratio to net your extra lift?
 
Have a Howard's Cam's "retro -fit" LA hyd roller cam,in my Magnum. Lift .515" intake/.520 exhaust. I dont see .525-.550 lift ,a problem. The ,heads/valvetrain ,the limiting factor. A better idea: What do,you want it to do?
And how crazy,you want to get?
 
We're running a Hughes 1828 grind with .510 " / .544" lift and speed pro pistons in a 91 360. We have good piston to valve clearance and my head guy went through the heads to be sure that we could go over .600" lift for extra cushion.
 
Abodybomber said:
Have a Howard's Cam's "retro -fit" LA hyd roller cam,in my Magnum. Lift .515" intake/.520 exhaust. I dont see .525-.550 lift ,a problem. The ,heads/valvetrain ,the limiting factor. A better idea: What do,you want it to do?
And how crazy,you want to get?
Click to expand...

friends say i'm "crazy" all the time.........lol.

i'm just wondering if u can use the stock lifter configuration, get some moderate lift without hurting anything, there will be probably eddy heads and some nice roller rockers on top......
higgs
 
Not hard to have them go 550 lift and if you want more lift, increase rocker ratio.

Last one I saw had ~580 lift.
 
I have the same block, use comp cams xr286hr cam, 0.363" lobe lift, no trouble with the stock hydraulic roller lifters. keep in mind these need a little more preload than the flat tappets - i think Hughes has got some info on their homepage.

Michael
 
Same block running a Comp XR292HR cam, 0.366" lobe lift, stock hydraulic lifters. Engine is being built right now, but shouldn't be any clearance problems according to my builder.
 
hollywood hig said:
friends say i'm "crazy" all the time.........lol.

i'm just wondering if u can use the stock lifter configuration, get some moderate lift without hurting anything, there will be probably eddy heads and some nice roller rockers on top......
higgs
Click to expand...


That's what we're putting together. Stock valvetrain with hughes cam. everything looks good so far.


If you decide to run Hughes, make sure to get the proper cam for electric or mechanical fuel pump. Don't let them send you the "wrong" cam with the "adapter kit".... Disaster....

They told us that's all they had in stock at the time. I would have rather waited until the proper cam came in.
 
Thanks guys.

It's kinda hard to find info on stock roller lifter motors, what cams are available and what works with the factory lifters.

Much appreciated!
 
krazykuda said:
That's what we're putting together. Stock valvetrain with hughes cam. everything looks good so far.


If you decide to run Hughes, make sure to get the proper cam for electric or mechanical fuel pump. Don't let them send you the "wrong" cam with the "adapter kit".... Disaster....

They told us that's all they had in stock at the time. I would have rather waited until the proper cam came in.
Click to expand...

thanks for the info on that, i have the cam that came out of the motor, and was thinking about sending to hughes for a regrind, haven't determined that yet........

YY1 said:
Thanks guys.

It's kinda hard to find info on stock roller lifter motors, what cams are available and what works with the factory lifters.

Much appreciated!
Click to expand...

ditto to that, guys, fabo never fails me as far as good advice and information, thanks a truckload!!!
higgs
 
I just finished building the same motor. I sent a stock billet hydraulic roller to Oregon Cams in Washington and he ground it for me custom. I am running roller rockers but my cam is not that big. Let me tell you, it's sounds NASTY! Pm me and I can give you specifics if you would like.
 
One of the issues with regrinding is moving the LSA. The stock cams are in the 112-114 range IIRC. Something to inquire about when going that direction.
 
Yea I agree. They were able to move mine to 110. The guys at oregon cams are really cool and do a lot of mopar stuff so they are familiar with what works. Ken is the guy you want to talk to if you go that route. Cost me 150 for the regrind which is cheap in comparison with the cost of some of these new good quality roller cams.
 
bvt69dart said:
Subscribed, great info!
Click to expand...
lol.....u better be subscribed since it's your block/build we're talking about......

crackedback said:
One of the issues with regrinding is moving the LSA. The stock cams are in the 112-114 range IIRC. Something to inquire about when going that direction.
Click to expand...
thanks for the info rob, didn't even think about that........i have some questions for ya on another build that i'm doing, i won't go into that here, but i will be pming you in the future if that's ok.....

gtmopar said:
Yea I agree. They were able to move mine to 110. The guys at oregon cams are really cool and do a lot of mopar stuff so they are familiar with what works. Ken is the guy you want to talk to if you go that route. Cost me 150 for the regrind which is cheap in comparison with the cost of some of these new good quality roller cams.
Click to expand...

thanks for the info on that, i'll pm u also on some specific's w/this company.....thanks again.
higgs
 
No problem. shoot me a pm when you want to talk about the build.
 
Here's what I'm using on my 92 LA 360 roller block (408 stroker)

Roller Lifters, 1992 LA 360 Stock
Rockers, Comp Cams Pro Magnum Roller Rocker Arms, 1.5 ratio
Hold Downs, Mopar P5249712
Camshaft - Hydraulic Roller (Cam Motion) XA242-380-248-375-10
Duration Intake @50 242
Duration Exhaust @50 248
Lift Intake 570
Lift Exhaust 562
Lobe Separation 110
Centerline (Installed) 105.5
 
Nice stick. Another member here ,has that in a stroked combo. Loves it.
 
Demon 408 said:
Here's what I'm using on my 92 LA 360 roller block (408 stroker)

Roller Lifters, 1992 LA 360 Stock
Rockers, Comp Cams Pro Magnum Roller Rocker Arms, 1.5 ratio
Hold Downs, Mopar P5249712
Camshaft - Hydraulic Roller (Cam Motion) XA242-380-248-375-10
Duration Intake @50 242
Duration Exhaust @50 248
Lift Intake 570
Lift Exhaust 562
Lobe Separation 110
Centerline (Installed) 105.5
Click to expand...

Yea good sounding cam. Might be a little big for a stock stroke 360 depending on compression/stall/all the other good stuff. Mine is .519 .532 should run good for my application. This is my cruiser motor. The 426 smallblock in my vert is the nasty one.
 
wow, some valuable information for me here, thanks to all that replied, and took the time to post up there combo's and valvetrain spec's.........this is really going to help when it comes time to make those decisions on the build.

also thanks for the cam chart rob, 'preciate it......
higgs
 
That's a pretty healthy bumpstick there Rob-probably be a little much for my 5.2 Magnum...
 
I called them,they never mentioned the 1221 grind. That is NICE.
 
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