Its because he has little or no intake tract.
It recirculates inside the valve but the air coming in is no match for the speed of sound coming out and there is little restriction to the sound through the small intake path/unrestricted filter.

Dann

i ran the wastegate source to a point after the intercooler to avoid boost sag...can see/hear the wastegate opening while driving so it seems to be working well. Of course this is only with a 5lb spring, but I'll keep the same spring when I start tuning boost control so i think it should be just fine

Me too :bang:

You just need to sand the tabs down a little sometimes, its all good.

Dann

Every time req fuel has been off for my friends and I, it has been a mater of inccorect dead time settings.

Unfortunately the EFR's wastegate discharge does not allow much more than a small nut and washer below it as it interferes with the stud.

I ended up using Stage 8 on three of the four studs and just used a OEM nut from Nissan on that one stud. Held up well.

Great build!

added a flex fuel sensor, headed to the dyno tomorrow. still only on 5lb spring pressure.

https://cimg8.ibsrv.net/gimg/www.mia...b6cbba1c9b.jpg

Did you ever solve the reqFuel issue? I just bought ID1000s yesterday and am going to be installing them soon. What MS settings are you running for them?

i put reqfuel back down to 3, but had to double
my fuel table. Should figure it out today.

You need specific EFR studs.

@Savington at TSE makes some.

No, even with my TSE studs the stage 8 hardware didnt want to go on. It would fit over the stud just fine, but there wasnt enough clearance for the big teardrop peice to fit next to the turbo. I had to cut some material off.

Oh yeah, I ground the shit out of my stage 8 downpipe bolts.

I have the tse stud/stage 8 kit. I'll just file down the locks a bit to fit.

Yah ur gonna have to do that. After my track day I noticed that they fell off somehow. :dunno:

See above. Still won't fit.

Nissan's studs are Inconel and are ~$4-5 vs a full TSE stud kit. It's worked just fine for me with standard hardware. I also ended up using Norlock washers and after 8-9 trackdays (one with 100+ degree outside temps for the entire day), no issues with backing out. I also made sure to hang the downpipe correctly and that alleviated a majority of my problems. I was also only 3-320 WHP on my 240, so also not full 400WHP heat issues.

Backing out isn't the issue we use inconel studs to solve. The issue that miata's have with studs is them stretching. It is also people who are a good bit faster then spec miata times that have the issues.

Not sure what I'm seeing. The TSE EFR studs take that into account. IIRC one is shorter than the rest.

aidandj, The issue is not with stud length, but with the locking hardware. The Stage 8 stuff is a fair bit taller (considering the locking shank or whatever it is called) is itself 1-2 mms thick. Anything apart from a standard nut, regardless of stud length, suffer from a severe lack of room. The wastegate discharge runs right over one of the studs in most cases.

Here is an example. A shorter stud does help, but not with Stage 8 or any other hardware that adds height. It seems the TSE kit uses the standard locking hardware as well. I am not seeing where they include a shorter stud?? According to their directions

But I could also be very wrong. I am sure Savington will tell me if I am incorrect. But from my experience, using the Stage 8 hardware was a no-go on the side with the wastegate discharge. I also had my housing ceramic coated, so I wasn;t doing myself any favors either.

https://cimg3.ibsrv.net/gimg/www.mia...6c8dcc4d79.jpg



The stretching is a precursor to them stretching and unwinding the nuts and then the studs themselves backing out entirely from the flange.

The SR20DET (what I used for track days and such) guys have suffered this just as long, if not longer, than Miata guys. I am on the throttle at Summit main a fair bit with just 200 TW tires for it to be problem for me initially.

You have it right. We actually verified nominal dimensions with both Borg Warner and Stage 8 before releasing our final EFR kit. The tightest allowable specification in that location (under the WG discharge, or what I usually refer to as "rear lower") is 8mm, the same as what Stage 8 nuts are supposed to be. On the tightest housings, you will see a machining pass there that's exactly 8mm. Many of the newer shell-mold turbine housings I've seen have a lot more room than that. Yours actually has plenty of room there - at least 10mm if those are 1.25mm threads. IOW, you could have used Stage 8's nut there. I put a little Resbond on that nut and it's fine, but you can use a Nissan copper locker as well. The Stage 8 locking tabs fit everywhere else with just a little trimming to clear your particular turbine housing as necessary.

Thanks savington. I had had several housings with the varying molds and I have had the pleasure (or displeasure.......) of experiencing all of them :D. That directly affected the effective volume one had available in that specific area.

The picture above is not mine directly, but was one of the newer housing molds for reference. The older molds made it impossible in that area.