Interesting... seems like many bad things happen to this engine around 4-5K rpms, including the direct injector seals getting burnt. Is there a photo of diagram of this oil pump available?

Over 9000

I just went looking through the service manual to see if the oil pump tear down was in there. It wasn't but after looking through some of the pictures it appears that the main bearings are half groove. Half groove bearings work well at low RPM, but at high rpm will start to pump oil on there own, and force the oil back toward the oil pump. This could be the cause of the weird oil pressure vs. rpm plot. Also makes me wonder if the secret sauce bearings in FRS300's engine build are just two sets of FA20 main bears combined to make full grove bearings.

Really? I have never seen my oil pressure gauge drop PSI on the dip range (or any other RPM for that matter) or not increase exactly as is any other RPM.... :iono:

where did you find the half groove info i dont see that anywhere in the pdf manual i have maybe mine is a pos

Yep, you can fully test the car in FL, just run it hard on the track.


Oh and post #3 Looks Legit....

Seriously man, it seems you have 86 Hypochondria.

So you mean to tell me Crawford, FBM, FA20, Don, Treadstone, et. al. have taken the engine apart but none have taken the time to explain this about the FA20 oil pump and how it affects cars, and none have designed an upgrade to make money off of it?? Is it POSSIBLE yes! But I find it hard to believe that not even one of them would capitalize on this and design SUCH a needed upgrade.


But this is America, we are all free to say what we want so go ahead with the FA20 POS campaign :)

MILES AND STR8 roads are all i need lol :party0030: if i go on some back roads ill end up drifting and just burning tires lol ill leave that up to someone else. but for now 25,000 turbo miles by december and more daily abuse wil be made by me :). I willl keep pushing untill i cant push no more than BUILD and push that as far as i can go then on to the next project :) !!

I was just looking at the pcs in the PDF that's on here. It was by no means definitive, but I have seen half groove bearings in the past and they acted in a similar fashion.

http://www.ae86drivingclub.com.au/fo...OOOOOM!http://


Its post #3

il will take a look at this myself hook up my computer and see the presure im curious, but untill then i need soild facts numbers vidoes sheet lol sadly thats how society is! that link could have been anything "overboost" , "shit tune", what ever excuse i can think of

as always it depends 100% on how you use the car. you could drive around at 400+whp on a turbo car with absolutely no other mods, and if all you're doing is driving to the local walmart for some hard-parking, it'll probably last forever. if you take a stock car to the track every weekend, it probably won't last very long. extrapolate in between.

The transmission is the part that worries me more at this point

agreed! but i WOT to walmart hahahha jk jk.. im still curious to the oil drop thing

walmart is 1/4 mile away exactly from my house

You do know that WOT pulls aren't a high stress with this car? WOT is completely open loop and purely dependent on simple dyno tuning.

Its the part throttle on/off mid to high rpm up hills, feathering around sharp turns stuff that stresses this motor.