Zaku-8

Anybody using it or considering it for their FI or port job? How useful or necessary is it?

At what point (boost, hp, flow, fuel flow?) is it required?

army_rx8

hehe you should probable ask racing beat when it is required. as i understand it it just replaces teh second piston with the one from teh auto rx-8 (it's a larger one in teh low hp model i believe)...there for flowing more oil at higher rpm's / load. i don't think it's required with the greddy kit....it'll just help out with cooling at higher rpm.'s since the turbo uses the engines oil for cooling...and those babies get hot. i think i'd go for teh greddy oil pan befor the oil pump upgrade from RB. (it adds 600cc to your oil capacity). but down the road i don't think this is a bad idea....although it may be a lill over kill.

now if you had the SSR turbo...that might be anouther story. but i guess we'll find out. also i think it woudl be a good idea (if you are really interested) to write RB and ask them how much more it flows at higher loads/rpm's. i dont' think it's listed on their sight the exact specs for this upgrade.

Fanman

I am wondering which one to get myself. Both are around the same price, either I get the metering oil pump mod, or the oil pan. My question with the oil pan is what different functional difference is there (other than an extra 1/2 quart of oil). I'm not going to buy a mod for the engine just because it looks cool. I brought this subject up a while back, but some of the posters stated that the oil metering pump for the car was already over-engineered for the car so even with boost the stock pump can handle it.

army_rx8

hmm...well with teh greddy pan you don't have to hook in the feed line to the turbo to the oil drain plug. i think it has baffling internally to keep the oil from sloushing around during cornering...least i'm pretty sure i saw that in the pic:D.

on my defi oil pressure gauge my car's max oil flow is 525kPa...and that happens at about 3-4k rpm at mid-max throttle. then it just holds that pressure all the way to redline. by the way 525kPa = 76.14489285326 psi. dunno if a biger secondary piston for the oil pump would improve this though. (also my car is NA..so i dunno if with a turbo it'll be a higher pressure or not....mechanics chime in anytime). hoep this helps some (hehe most likely not:p)