solid/hydraulic lifters
Racer
Joined: Sep 2001
Posts: 354
Likes: 0
From: Prineville Oregon
Re: solid/hydraulic lifters (Guru_4_hire)
Hydraulics are great up to about 6200 RPM (maybe 6500 when the springs are new). Solids will go to 8000 RPM when set up properly.
Hydraulics are none or minimum maintenance (great for the street), solids need to have the valve lash checked at least once a year, more often as your RPM's exceed 7000 RPM.
Solids are more repeatable for ET when drag racing, hydraulics rely on oil pressure to operate...your ET will vary a couple of hundreths of a second depending on oil temperature/pressure. A lot of races are won or lost by .001 or .0001 of a second!
Hydraulics are none or minimum maintenance (great for the street), solids need to have the valve lash checked at least once a year, more often as your RPM's exceed 7000 RPM.
Solids are more repeatable for ET when drag racing, hydraulics rely on oil pressure to operate...your ET will vary a couple of hundreths of a second depending on oil temperature/pressure. A lot of races are won or lost by .001 or .0001 of a second!
Melting Slicks
Joined: Oct 2002
Posts: 2,896
Likes: 349
From: Smithfield VA
Re: solid/hydraulic lifters (Guru_4_hire)
In addition for a street application solids can have oiling issues if kept a idle for a long period of time. Also Comp now has their "R" hydraulic lifter that is good to higher rpm's not sure how high though. I run them up to 6700rpm with no problem.
Thread Starter
Team Owner
Joined: Apr 2002
Posts: 62,198
Likes: 1
From: All humans are vermin in the eyes of Guru VA
Cruise-In IV Veteran
Cruise-In V Veteran
Re: solid/hydraulic lifters (racerns)
So a good set of hydraulics can reach 6500 rpm? solids are OK for the street just dont get caught in a traffic jam
Drifting
Joined: Nov 1999
Posts: 1,892
Likes: 0
From: St. Petersburg FL
Re: solid/hydraulic lifters (Guru_4_hire)
I don't really understand the issue about the solid and using it on the street, a lot of the earlier muscle cars of the 60's & 70's used them with out any problems, I had em and had no problems. Remember, the LT1 uses one and I don't see a lot of complaints from the drivers at parades, also I don't think GM would install one in a car that couldn't see "traffic problems", just keep the lifts a little lower, the duration a little higher, and the LSA above 110.
Melting Slicks
Joined: Jun 2001
Posts: 2,429
Likes: 14
From: CA
Re: solid/hydraulic lifters (Guru_4_hire)
You can run a bigger mech cam and have better idle than the same size hyd cam. My old solid cam had 234 deg @ .050 & 108 deg lobe seperation. It idled better than my current Comp Cams XE268, which is 224 deg & 110 ls.
