roller lifters vs plain solid

[john910]

what will produce more hp? sbc 350, 30 over. a roller cam or plain solid lifter cam?

[jmarksdragster]

Roller

[bjuice]

X2

[triniemi]

But which one will produce most hp / $ :D

[zipper06]

Right here my friend, any day of the week.

http://img32.picoodle.com/img/img32/4/2/19/t_bullitflattm_8c3b514.jpg (http://www.picoodle.com/view.php?img=/4/2/19/f_bullitflattm_8c3b514.jpg&srv=img32)

Will run with any roller on the market for the money invested.
JMO

Zip.

[dparker]

Theres as much increase from a solid to a roller as there is from a hydraulic to a solid lift cam. Its one of the best $$ per HP that you can spend. The reason it is, is because the quicker you can close the intake valve, the more hp youll make. On a solid lift cam, if your ramp speed where as quick as a roller your lifters would fly off the cam. Because you can't put the spring pressure on a solid to keep the lifter on the cam, that you can on a roller. If you did, you would have to much heat lifter to cam and lose a lobe. The roller allows you to have more ramp speed and more spring pressure for more Horsepower.

[john910]

what i should have asked is a hydraulic flat tappit to a solid flat tappit cam? i have a comp cam 292 501 lift and was thinking of going to a solid cam. what are the pro and cons.besides adjusting valve lash?

[bjuice]

you always stand the chance of floating a valve with hydraulic lifters if your wanting to turn it up (high rpm) as a drag car.....i personally have floated them on the street ( back in the day)..
if you are going to be seeing more street use then strip then hydraulic roller hands down ( IMO)..If its gonna be drag only ..OR you plan on turning it up (rpm) then go the other way....

oh yeah..i got a solid flat tappet in a 406ci....about a 520 lift...very quick..lots of bottom end.


also remember if you go solid flat tappet you need to break in cam the old school way.......( imo)

[curtisreed]

There is no way with the parts available today that I would run anything but a roller in a high performance motor. Street or strip. No worries about oils, breakin, etc. Just my opinion.

Curtis

[mopar1962]

roller will produce most hp and will also give best idle quality, happy holidays

[poncholvr]

question, never used solid lifters-
are they solid,and pump no oil through them?,so u would need a oil rail to lube the rockers?or do they still pump a lil oil through them?

i understand the precision of them so they dont fade with heated oil,and less adjusting, just curious

[jmarksdragster]

Solids still pass oil, the big gain is the ability to go higher spring pressure and RPM. For the street they are a little noisy and do require periodic adjustment. You can get some pretty stout hydraulics if you need...