1986 325iX 3.1L Stroker + Turbo

[downforce22]

are you running your own base map, or did you download it somewhere? i

I am running my own map. I started with WhodWho's base m20b25 map and tailored the spark map to fit according to this thread for a 3.1L M20. I have since gotten VE Anaylze to help me tune and adjusted my target AFRs and fuel values accordingly. My map still needs work but I will post them when they are tuned well. There is some hesitation at part throttle and throttle transitions. My VE map is not smooth right now. I also had to adjust after I upgraded from the 14# stock injectors to the 32# injectors. :woowoo:

[nomansland92]

are you running your own base map, or did you download it somewhere? i

[downforce22]

I may have jumped t conclusions too early on this, I drove the car to work today and the only thing smoking was the heat wrap I added on the downpipe,

It may have just been residual oil that got on the center section and turbo blanket burning off! Will let you know more soon.

[TheTacoMan]

Do you have an oil restrictor in place? I know that some applications need them depending on the turbo, maybe someone can add more to this.

[downforce22]

I will get more photos of the car soon.

However I am having one issue. The oil feed to the turbo seems to be causing issues. I got a new 4 AN fitting and installed it. It seems once the car is up to temperature the oil is leaking past the seal and begins burning. I am pretty sure all of the heat wrap has burned off anything it is going to smoke.

Do I need a different oil feed gasket or bolts? It seems to be coming from just one side of the oil feed fitting next to one of the allen head screws.

Any ideas?

[litu]

Awesome, we need more pics...I like that e30 model soo much, never see too much pics of this e30 :)

[downforce22]

I got the new fittings and made a quick video. I had to fabricate a custom head mount because i didn't want to drill the gopro case out to mount the external microphone, which is located under the fuse box in this video. She needs tuning all across the map especially on part throttle transition but runs good! About 12 AFR under boost.

[downforce22]

With 9.5:1, what was your boost target? If I recall, you were thinking ~10psi max?

I was planning for about 8 to 10 psi. The spring in my wastegate is set to 10 psi so thats fine. Lots of tuning to do still and I have to track down my oil leak.. GRR

the fart can has got to go

I kind of agree, but I kind of don't too. Because a car with a fart can is usually a slow one, so it will kind of throw people off.

Yeah I know, I plan to swap over to a stainless 3" inlet to dual outlet muffler but its fine for now to get it on the road. It is a bit loud though, Oh yeah and I cross threaded my oil feed so it was leaking and burning on the turbo so I'm waiting for new fittings. They should be here monday.

[varg]

the fart can has got to go

I kind of agree, but I kind of don't too. Because a car with a fart can is usually a slow one, so it will kind of throw people off.

[Dj Buttchug]

the fart can has got to go

[tschultz]

With 9.5:1, what was your boost target? If I recall, you were thinking ~10psi max?

[downforce22]

As it turns out I couldn't find other m20's with the Precision 5862. But I was able to find this dyno from a supra with a side by side comparison to the Precision 6262. As it turns out the supra engine should compare to what I have in the m20 aside from the 24v aspect of the supra engine.

The 3.0 L (2997 cc) 2JZ has been produced since 1991 (first released in the 1991 Toyota Aristo). Cylinder bore was 86 mm (3.39 in) and stroke was 86 mm (3.39 in).

KO Basic Single T4 kit for 2jzgte (cast manifold, short 3" downpipe with re-routed wastegate dump and a 46mm v-band wastegate. Dyno comparison of Precision 5862 turbo versus 6266 turbo.
Blue line is 5862 and red line is 6266. Boost was controlled only by wastegate spring (18psi spring), but boost level logged for the 5862 was 17.5psi at peak power, and 18.5psi on the 6266. Average boost for the runs was 1-1.5psi higher with the 6266, which would account for most of the difference in power.

http://www.koracing.net/gallery.php?folder=101&image=1259#imgtop

My engine has an 86 mm bore and stroke of 89.6 mm. For 3122 cc's total. The extra displacement should pick up some of the slack of the 12v 885 head as compared to the 2jzgte. It is interesting to see the 5862 fully spooled by 3500 rpm and continue climbing past 6000 rpm on this supra. The 17 psi probably plays a big part of the power number. Excited to see how this goes once the 5862 arrives! :devil: It's somewhere is Missouri on a truck right about now according to the tracking number

[downforce22]

Precision jb bad.

Precision bb good.

Garrett good.

Borg Warner best.

I was planning on using a precision turbo for my build until I started talking to a few race shops. Personally I've never owned one but for the price I've heard more bad then good with them, especially there journal bearing turbos. Go with borg warner from agpturbo.

But for real though, it got to be better than my ebay turbo

Once again we have Chinese knock-off product in the form of a very important and often overlooked piece of the turbocharger package - The BackPlate, this item is responsible for hydrodynamic pressure sealing -- in short the backplate land as seen below, is part of the oil sealing system in the centre section of the turbocharger. If this is damaged the turbocharger will leak oil through the turbine housing, and the engine will smoke at idle. Over time the turbocharger will carbon up the inside of the heat shield and turbine housing and this will hinder performace and cause a failure of the rotating assembly.

Most of the Chinese knock-off backplates have incorrectly machined backplate lands and/or non existent lands, and the result is a smoking turbocharger -- the companies selling these items revoke any suggestion of a warranty, and often blame the smoking on other irrelevant issues E.G incorrect oil pressure, faulty lubrication system, inadequate oil drain etc.

http://www.turbodirect.co.za/site/index.php?option=com_content&view=article&id=3&Itemid=22

I found this interesting also.

Inside A Precision 6262 Turbocharger

http://www.turbodirect.co.za/site/index.php?option=com_content&view=article&id=778&Itemid=21

[AWDBOB]

I was planning on using a precision turbo for my build until I started talking to a few race shops. Personally I've never owned one but for the price I've heard more bad then good with them, especially there journal bearing turbos. Go with borg warner from agpturbo.

Precision jb bad.

Precision bb good.

Garrett good.

Borg Warner best.

[litu]

Shiit that e30 ix looks awesome....That is my dream :)