kennysta01

I read where "Coach" and "Pat G" ran a solid roller cam with hydro lifters and made more power. I would like to know if I could possibly run hydro lifters with a comp cam 54-500-11. 1800-6400 rpm, .646/.641 lift, 270/277 113 lsa @50 235/240? Feedback would be appreciated.

Darkman

iTrader: (2)

For those that have not seen it = https://ls1tech.com/forums/dynamomet...d-28-rwhp.html

Rise of the Phoenix

iTrader: (27)

Very interesting thread Darkman.

Kip Fabre

You can put Hyd lifter on a solid cam. All you will be doing is making your cam duration go up about 8 to 10 degrees along with the lift of .020 to .025. More with a normal solid lobe. So if your cam was to small like the example Hyd lifters could help. It could also kill the power. If you do put Hyd lifters on most solid lifter cams they will have very soft ramps they are not designed for Hyd lifters. I will give you an example. We make a line of Low Lash solid roller cams for all applications they run with .008 lash. The rev high and don’t beat up lifters and the valve train. On these lobe you can run solid or Hyd lifters. If I want the same lift and duration at the valve one with solid and one with Hyd. Here is how I need to make the lobe. Solid lifter lobe 240/366 with .008 lash at the valve.
Hyd lifter 233/360. So these two lobes one with Hyd one with solid with .008 lash. They will have the same valve motion but different looking specs.

ez2cdave

What about Solid Roller Lifters on a Hydraulic Roller Cam ?

Kip Fabre

Solid rollers on a Hyd cam works fine. You just need to set the lash tight .006 to .008 we make cams like that for lift rule classes all of the time.

ez2cdave

What's the typical "re-adjust interval" for solid roller lifters ?

Problematic on an LS motor in a 4th Gen F-Body, due to the motor being set back under the cowl ?

Kip Fabre

We have made these SBC BBC engines. We made LT1 for TPIS years ago after running in a street engine for 20,000 miles the lash was find no adjustment needed. They work very well.

726.0chevelle

iTrader: (17)

I have a buddy did a mild hyd. roller setup in a big block. He had a lifter failure and another set wasn't in the budget he found a smoking deal on a set of solid roller lifters and threw them sounded awesome and never had another failure.

kennysta01

So Kip, do you think my cam is too large for hyd lifters? Are you saying I will gain .020 of lift that may cause a piston to valve issue? BTW thank you for the feedback.

Kip Fabre

You can put the Hyd lifters on your cam. It may help power it may not help. How much lash were you running subtract that and that's how much lift you will gain. It could idle bad if it has long lash ramps like some solid lifter lobes.

S10xGN

iTrader: (11)

Interesting, Kip! I have what I think is an LGM G5X3 cam that I "cam doctored" myself and got these specs:

• IO @ 18.0 BTDC
• IC @ 35.0 ABDC
• ICL @ 98.5 ATDC
• EO @ 63.0 BBDC
• EC @ 2.0 ATDC
• ECL @ 59.5 ABDC
• Int duration @ 0.050" = 233°
• Exh duration @ 0.050" = 245°
• Int lift = 0.600"
• Exh lift = 0.609"
• LSA - 109.5°

This cam looks to be in good condition with minor roller tracking marks on the lobes and I have a T&D adjustable valvetrain. So, no problem running solid rollers on a 418" all aluminum engine? What would be a good starting cold lash? My dyno program shows this to max out right before 6500 (which is perfect for me as this is a street-only engine) but has great numbers under the curve...

kennysta01

Thank you so much sir.

Kip Fabre

Hi Russ
This will be a long one I will PM you.

S10xGN

iTrader: (11)

Got it, thanks!