powermalex

Any one have air filters this oily?

I had a oil leak but I could not find the source. Till I opened up the M2 air box. The FD is driven <1000 miles a year. The turbo's have been rebuilt about 3 years ago along with the motor and has about 10K miles since I bought the FD.

The air box had oil pooled inside it. The pic is after I wiped the oil out.
I'm not sure where to start to find problem. But if the turbo's have 10K on them I would have expected them to last longer. I expect the IC may have oil in them as well. So I will pull it to drain if any.

The FD runs great pulls in all gears even breaks traction when 2nd turbo's come on line on 1st and 2nd gear.

Oil lines and oil pan don't leak. Apparently the oil has accumilated in air box then finally leaked out the bottom of M2 box. Any suggestions on problem?

Rated R1

It's oil blowing from the turbos and probably getting into the box via the BOV and/or the CRV. I would not worry about it too much.

powermalex

Is that, that normal to have that much oil blowing from the BOV? The accumulation is based on <3000 miles on these filters. When I do drive though I do drive it hard and hit 2nd turbo's at least in 1st to 3rd gear.

I was thinking of pulling the turbo's to make sure the return lines are clear.
Could the seal on the turbo shaft gone bad and started leaking?

FDNewbie

iTrader: (10)

Damn son...I WISH I could say the same...

allenhah

iTrader: (4)

I think it's considered fairly normal. I have the older M2 CAI, which has the separate ports for the different hoses, so it's easier to see where the oil comes from, and I could see little spray patterns of oil coming from the stock BOV hose.

powermalex

WoW that's allot for being normal. Did you look at the pics. Thats oil dripping from the K&N filters. Is this why I need a catch can? Its funny how I hear about FD leaking from the pan but mine leaks from the air box. Keep in mind this oil has accumulated from just ~500 miles of driving over a 15 month period.

If its all coming from the BOV then I will have a custom can built into the M2 box that I will just drain every other tank full of gas. May even put a drain plug at the bottom of the intercooler.
(What is CRV ackronym stand for?)

Any one else have that much oil blow by?

Trout2

iTrader: (5)

This is not normal.

I've had an M2 CAI for several years and usually clean the filters annually, 5 to 10K mi, and only have a thin film of oil that's heavier by the connects for the blow off valve and charge relief valve.

I'd be suspect of those rebuilt turbos. It could also be problems with the PCV valve but more lekely the turbos. Your intercooler and piping is probably full of oil too.

Jack

powermalex

I just started it up without the air filters and reved it up from idle and look I get oil that drains out of the airbypass hose (BOV).
Comments anyone?

badddrx7

iTrader: (7)

You have a oil seal leaking excessively in your turbos ( compressor side ) OR the return line is coked off. Pull the Y pipe off and look down inside there toward the tourbo outlet. I'd also check your return lines.

Tom

powermalex

Looks like the internals of the turbos are shot. This suck they work great but leak oil interally on the compressor side. Anyone have a parts breakdown of the Hitachi turbo's. I'd like to rebuild them myself. I have a reciept from the previous owner from Majestic Turbo's Looks like they rebuilt it twice.

saburo

iTrader: (1)

holy smoncockulousroculous thats alot of oil

powermalex

I'm looking to just upgrade to the 99 spec twins. Doe any one know if thats a ball bearing setup?
I like the sequential set up. Anyone know of a good place to buy one.

badddrx7

iTrader: (7)

Take them off and tear them down yourself, it's not that hard to do. Take good pics and notes as you dismantle the parts. USe scribe marks on all the mating surfaces while dissembling. Order two new overhaul kits for your unit. Spread the parts out on a good clean work table, clean everything up very good. Check for cracks throughout the passages. Do some porting while you're there, especially on the wastegate. I have a ton of pictures of where I overhauled my own stock turbos 4 years ago, also went Non-sequential while I was in there. Now I'm single turbo.

If you have the time, skill level and patience - Do it yourself. You'll appreciate your effort when the car is back up and running.

Tom

powermalex

Tom
Send me pics. (powermalex@aol.com) The efini turbos are $2595.00 from RX7.com
My turbos have been rebuilt before with ~10K mile on them.
I may just have a bad rebuild. Anyway I may want to rebuild with ball bearing.

Alex

Sgtblue

iTrader: (16)

Lot of positive talk lately about the new BNRs, at least the stage III.

powermalex

BNR have a web site?

Sgtblue

iTrader: (16)

http://www.bnrsupercars.com/

Looks like the site is under contruction...only a phone number. Search under BNR for the latest posts about them. I know GoodfellaFD3S likes his and seems to know about them. I'm not endorsing them, it's just that I'm probably going to be replacing/rebuilding mine within the next year or so and looking at options.

https://www.rx7club.com/time-slips-dyno-121/dynoed-new-bnr-twins-low-boost-341297/

7Langit

Rotary Performance has Efini ball bearing turbos for sequential OEM setups. They claim 20 more hp I believe, plus much faster spool-up.

powermalex

I'm looking at those Efini Turbos. I'll call them Tuesday if they have them in stock and are ball bearing. I'm going to pull my turbos out tomorrow as well.
With any luck they are rebuildable. If not I'm going with a new Efini.

Trout2

iTrader: (5)

The Efini twins are not ball bearing. Those are a good choice since they are totally new turbos. If you have the supporting mods or intend to build your car up, then consider the BNR's.

It wasn't just a bad rebuild you had. Most rebuilt turbos don't last if you manage to get a set that works for a while.

jdhuegel1

Huh?

Alex, got your call. Was a little late listening to my voicemail, so I'll call you back tomorrow. I don't believe there is any kind of "BB rebuild" available for the stockers.. IIRC, the M2 BB twins required a little more than just removing shafts and converting to BB. I could be wrong though. There was a thread around here somewhere.. I think SPOautos had a set? Someone did... can't remember the results though. I'll see if I can dig it up.

Justin

powermalex

Well I pulled the turbos out. The 2nd turbos are shot. Lots of end play. I plan to rebuild them myself and have them as standby when the Efini turbo's go out. So based on the amount of driving the FD see's that will be in about 20 years. May be I'll just sell the core.
Anyone know of a rebuild kit with ball bearings replacement. I assume they are better than the bushings.

Comments anyone ball bearing vs. bushings for turbo rebuild?

tt2323

Wow how can anyone say thats normal. Good luck with the new turbos which ever route you choose

powermalex

https://www.rx7club.com/showthread.p...t=ball+bearing

Found bearing vs bushing.

powermalex

Well took apart the 2nd turbos. Looks like it was a bad rebuild. Anyway I decided to go with new Efini Turbos. Just finished with the install and back from a test run. Damn thing is crazy. Tires break traction fast to 2nd gear. Now I have a new problem. The turbos spool up fast and when the 2nd turbos come on line its peaking at 16.5 psi ~17psi.

I got to get her back down to 13 psi At least thats what M2 tells me the Stage 3 ECU can handle.

Looks like its time for larger injectors, fuel pump and Power FC so I don't knock the motor.

Anyone know a cheap way to get her back down. Some one suggested to drill out the waste gate pill or install a Home Depot boost controller.

Comments welcome. Anybody want to buy a use twin core, secondaries are shot. It needs a new shaft.