Originally posted by curatchko
A FRAM STORY
I occasionally dyno an engine that I build for various racers, and this was a friends Small Block Chevrolet, roughly 800 horse 410 cubic inchs. NOT a cheap engine.
Well we show up at the dyno shop and the guy I did this for shows up with a Fram oil filter. I told him I'm not a fan of those and he's telling me that's all he's ever used. Okay... I'm sure it won't be a problem right now... changes oil after every race anyhow... . no big deal
We get everything set up and begin warming up the engine and breaking it in.
For those not aware, a common thing is to plug or remove the bypass valve under the oil filter on a wet sump type oiling system.
Long story short. We begin noticing that the oil pressure is falling off... slowly diving towards zero... . we're only putting a slight load on the engine at around 2200 rpm just for a break in so no big emergency..... we shut it down, and I cut the filter apart to see if there is any bearing damage. NONE... . just normal stuff in the element.
So, he sticks another fram filter on there and we start over again pressure is fine now... . wierd. Well **** after about 15 minutes pressure starts falling off again. So now I'm not sure if it's a temperature issue in the block... crack in an oil galley??? WTF??
Pull the filter again, cut it open again... nothing. I told him to go get an AC Delco filter this time and quick screwing around.
Wouldn't ya know it... . pressure was good... everything was good all day long.
NEVER USE A FRAM FILTER.