Solid roller lifter failure

patrickt · #1 (**permalink**) 10-11-2009, 09:31 AM

Quote:

Originally Posted by LMH

Don't you have to use oil restrictors when using solid lifters to keep the properly oiled?

Most of us run restrictors up top with the HV pump down below. The size will vary, but the general rule is .090 for hydraulics and .060 for solids. Many folks don't go down that low for solids, but many do (including me).

bermblaster41 · #2 (**permalink**) 10-11-2009, 08:57 PM

First of all thanks again for all of your help and input. Long story short. Turn of events that led up to my failure. Last summer I used a FRAM oil filter.(EPIC mistake) I noticed a drop in my oil pressure of almost 20 psi. I ran it for a bit not sure what the problem was. I switched out to a NAPA gold filter and regained my oil pressure. While I was useing the Fram I think I hurt my main bearings. I have my motor out and I am replacing my main and rod bearings and a new melling high volume oil pump. My crank looks good. The guy who designed and built my cam gave me a good deal on repairing my cam and new solid roller lifters. I will run this for a while and keep a close eye on my valve lash. In a few years I will swap out my entire valvetrian for a hyd roller set up. Yes Larry I do have a restrictor in for my mains. My machinist suggested an oil developed by a racing team that is supposed to be the most slippery oil on the market. I will post the brand in the a.m. I can't remember. I also want to push the oil pressure regulator button in a pinch so I will end up with 75 psi under a load. Thanks again! Berm

Ant · #3 (**permalink**) 10-12-2009, 12:26 AM

My Keith Craft 373 Yates engine runs a flat tappet camshaft with 185 seated and 450 open spring pressures, has 10.3.1 compression and made 675bhp on KC's Dyno, since then we re-dynoed here in NZ and this engine develops well over 600bhp on NZ BP98 octane fuel. The camshaft was run in using the outer springs only and I am running Delo 400 which has 0.15ppm of Zinc until it has done approx 1500 miles and will then use a good quality semi synthetic oil which has approx 0.15ppm Zinc. I have Schubeck ceramic lifters which are quite expensive and dont like excess valve clearance, we looked at the camshaft after the dyno runs and no problems!

I guess keep an eye on the valve clearance etc, this engine developed max pwr at 6800rpm and in my lightweight cobra the engine should last a while changing around 6500rpm, naturally metal parts wear out and springs loose their tension, I would think it prudent to check and possible strip the engine every 2-3 seasons pending usage.

blykins · #4 (**permalink**) 10-12-2009, 01:58 AM

Berm, so who made the cam?

bermblaster41 · #5 (**permalink**) 10-12-2009, 03:16 AM

Blykins my cam was designed by Scott at http://www.camresearchcorp.com/ Scott deals with fords specifically. Berm