Johnson Roller Lifters

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SSG_Karg said:
I’m not going to speculate on the difference in power between using a roller versus a flat tappet but it’s probably not felt in the seat of the pants. My reason for leaning towards the roller is to avoid the bad reputation of flat tappet lifters as of late. Seems I’m seeing more and more lifter failures. Is this due to inferior production, difference in today’s oils, or operator error?
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Mid upper rpm with a solid roller is plenty feelable in the snapping of your neck when you goose the throttle.

50% operator, 30% spring pressure is wrong
...20% oil.

Jmo
 
SSG_Karg said:
I’m not going to speculate on the difference in power between using a roller versus a flat tappet but it’s probably not felt in the seat of the pants. My reason for leaning towards the roller is to avoid the bad reputation of flat tappet lifters as of late. Seems I’m seeing more and more lifter failures. Is this due to inferior production, difference in today’s oils, or operator error?
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All of the above
If you are speaking of hydraulic flat tappet failures you are correct.
Just research the failure of hydraulic roller lifters if you want a real eye opener, I speak from experience. Unless I was to build a balls out racing engine everything I put together will have solid flat tappet lifters. I am done with hydraulics flat or roller.
 
MOPAROFFICIAL said:
Mid upper rpm with a solid roller is plenty feelable in the snapping of your neck when you goose the throttle.

50% operator, 30% spring pressure is wrong
...20% oil.

Jmo
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I agree except 70/10/20 is how I see it.

The number one cause of cam failure is not getting the engine up and running. The other operator issue is not verifying that the lifter rotates in the bores correctly.

I'm on the fence between SFT and SR because I'm not a fan of SR lifters on a street deal, unless the operator is willing to do maintainance on them. As the operator of my junk, I'm getting old enough I don't want to work on it that hard. I paid my dues more than once.

I'm leaning to a mushroom lifter deal if I can get the lift where I think it should be (net .700 is about what I think I going to need to be) and do it relatively reliably. If not, it's a solid roller and Crane Pro Series lifters.
 
yellow rose said:
I agree except 70/10/20 is how I see it.

The number one cause of cam failure is not getting the engine up and running. The other operator issue is not verifying that the lifter rotates in the bores correctly.

I'm on the fence between SFT and SR because I'm not a fan of SR lifters on a street deal, unless the operator is willing to do maintainance on them. As the operator of my junk, I'm getting old enough I don't want to work on it that hard. I paid my dues more than once.

I'm leaning to a mushroom lifter deal if I can get the lift where I think it should be (net .700 is about what I think I going to need to be) and do it relatively reliably. If not, it's a solid roller and Crane Pro Series lifters.
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Who makes a mushroom lifter for a SBM LA ?
 
512Stroker said:
Who makes a mushroom lifter for a SBM LA ?
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I think Jim at Racer Brown still has some, or can get them. I have not talked to him in a couple of years though.

I need to find the time to call him and find out if has them, or can still get them.

If not, I'll be forced into a solid roller.
 
yellow rose said:
I think Jim at Racer Brown still has some, or can get them. I have not talked to him in a couple of years though.

I need to find the time to call him and find out if has them, or can still get them.

If not, I'll be forced into a solid roller.
Click to expand...
If you go with those Crane rollers (hi quality) be prepared to breakout your check book. LOL
 
512Stroker said:
If you go with those Crane rollers (hi quality) be prepared to breakout your check book. LOL
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Yeah, I know they are close to 800 bucks or so. But my insignia is a cringing chicken. I don't have the guts to skimp on lifters. BTDT and paid a nasty price for it.
 
Stiff springs and a crank-no start would be my guess on why lifters fail. I have never had a lifter go flat.
 
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