Lionsden

Never heard of such a thing. Is there something he is doing to make this possible? :confused:

http://cgi.ebay.com/ebaymotors/ws/eB...category=33614

CFI-EFI

All my life, mixing cam types and lifters was a, no no. Recently someone posted, here, that Comp had advised him that he could run either lifter with a particular cam that he was discussung with them. I'm old school. I would buy the set up I wanted, rather than risk that high buck equipment. Is life still "boring", Dan? Stingray.

RACE ON!!!

Hank

I opened my 502 last week, assembled by a previous owner. To my surprise, it had the hydraulic roller 502/502 cam and solid roller lifters. The car ran great for 3 years.

When I posted this here, several people commented that it depends on how aggressive the cam profile is. Mild profile = less risk.

danno85

It must also make a difference between roller vs flat tappet as well
as to whether solid lifters are OK on a hydraulic cam. I've always
heard too that on flat tappet cams you could never mix them, i.e.
put solid lifters on a cam ground for hydraulics, and vice versa, and
it was because of the ramp on the solid flat tappet cam that was designed to
take up the clearance as it started moving the lifter. Maybe with roller
cams it's not that big of a deal any longer.

Lionsden

Hey Stingray it's been awhile. Still as "boring" as ever. :D

I purchased (ebay) a Crane hyd roller cam for a 406 I'm building. Not sure what's up but retro hyd rollers are impossible to find at less that retail price. Solids can be had for about 1/2 of the hydraulics. Crane tech might have thoughts on using solid lifters.

Still mixing use to be a real 'no no'.


[Modified by Dan Plett, 10:58 PM 2/3/2003]

75 BBC Stingray

When I was looking at cams, I asked the same question. The answer I got from a cam/lifter manufacturer was that you could run a solid roller on a hydraulic roller cam. As far as I understand thats it for the cross-over.
Hydraulic roller lifter on a solid roller cam - NO
Non-roller lifter on a roller (hydr/solid) cam - NO

gkull

I'm also over on another Chevy performance forum. They seem to think that SR lifters are fine on a HR-cam if you run tighter lash to allow for the high intitial ramp speed ground into HR-roller cams. .008 or less lash


[Modified by gkull, 8:53 AM 2/5/2003]

CFI-EFI

Dan,

I've been hanging out, here, for quite a while. My old Crossfire is just plain worn out, but I've got it into the 13's (corrected to sea level). Not bad for a virgin long block. What cam did you get? I bought a "new" engine that came with a Crane hyd roller. I am tearing it apart to check it out. Curious if ours are simular.

RACE ON!!!

Lionsden

CFI-EFI

Crane Part# 119831 Grind HR-284-28-12 IG
duration @ .050 222* int and 230* exh
lift .509 int and .528 exh

This is going in a 406 with (hopefully) AFR 190 heads. Staying with the crossfire concept, Edelbrock SY1 with either 2.190" or 2.200 throttle bodies, 80pph injectors with a vafpr. Check sig link.

JUAN J SANCHEZ

Yes! You can run solid roller lifters on a hydraulic roller cam with tight lash but this is the only mix matching of lifters to cam thats successfully possible. I'm thinking of doing this with my hyd roller because I can't find any retro-fit hyd roller lifters anywhere.

Bearcat

If you look on Crane Cam's website, it lists a few options for hydraulic lifters. They have anti-pump up lifters now that they advertise are good to 7000 rpm, and they have a type of lifter that actually changes the lift at lower rpm's to smooth out the idle and increase vacuum, and then reverts to the cam's radical grind at midrange to upper rpms. The advantage to this is obvious. Most cams will clean up at higher than idle rpms, but if you can run one of these "variable" lifters on a bigger cam, then at the lower rpms, theoretically, it should still pass emissions, and then you get the benefits of the large cam, performance-wise, when you need it.

Based on the new hydraulic lifter technologies that are available, why don't you play it safe and run a newer style of hydraulic lifter, rather than to risk damage to your cam by running the wrong type of lifter?

CFI-EFI

Dan,

Mine is a little bigger. I like the idea of sticking with the Crossfire theory, but I'm afraid I will have out grown it, with the new bullet. Keep me informed. I'm very interested in how it works out. Good luck, and...

RACE ON!!!