Full Build Thread - Twin Turbo e30 m3

[Xtatic]

This one's a 6'er now

i am aware it's a 6potter, i was asking about the "3cyl into one turbo" thing

[coltboostin]

i am aware it's a 6potter, i was asking about the "3cyl into one turbo" thing

It should work fine. I have twin 50 trims (larger turbo's) on my 2.4l Mitsu 4 banger and I get 30psi by 5500rpm in 3rd gear. Considering flow potential vs a similarly sized single, thats plenty fast.

My old whip did not see full boost till 6k, so this is a step up!


Project looks great-way to step out of the box.

[SierraNevada40]

Wow, awesome job bro. I cant wait to see some videos!

Thanks, appreciate it!

The interface is a bit goofy with SDS, but once you learn how to work with it, it does a great job.

It is a bit goofy, but functionality is great. It does everything I need

What motor is that?

M52 block/S52 Head (Cams)

very nice, love seeing a different build. good job on the work and lets see some more photos/videos.
-Jason

On the way!

Nice build, looks like you did all the preparation before hand but your car looks awesome! Very creative, nice garage! You should take those basket weave tires out of the pick up truck and get some fun vids

I know, the tires on them won't last long

great looking build!

just curious: is there an advantage of feeding each turbo from one manifold half?
Or was it not by choice?

I read somewhere that turbos like exhaust flow as continuous as possible and turbo 4potters (comparing to 6 for instance) actually suffer from too large of an interval between the exhaust pulses at low rpm.
But i see even BMW used same idea on 335i, so i am at a loss

.....sick build! cant wait to see it finished!

It was not by choice, it just happened. I can't imagine the pulses being so far apart that it makes a pulsation in the rotation of the turbos.

It should work fine. I have twin 50 trims (larger turbo's) on my 2.4l Mitsu 4 banger and I get 30psi by 5500rpm in 3rd gear. Considering flow potential vs a similarly sized single, thats plenty fast.

My old whip did not see full boost till 6k, so this is a step up!


Project looks great-way to step out of the box.

Thanks, I like doing something different. Its much more fun figuring it out by yourself, rather than reading install directions from AA or something like that

[postmaster]

Those are all the pics I have for now! The car is running though. I'll get some more tomorrow.

I'll believe the car runs when I see a video.

Preferably in HD, with your car walking an e39 M5.

[DCR62]

Good to see another E30 M3 turbo project. Good luck with it all.

[Boostedcorrados]

The guy on the passenger side of the car needs a hair cut.


Sick project man! Lucas sent me the link and said i may like this...He was right!

[SierraNevada40]

The guy on the passenger side of the car needs a hair cut.


Sick project man! Lucas sent me the link and said i may like this...He was right!

Haha, thanks for checking. There is no hope for that kid. Maybe he could get a job if he did get a haircut...

[Boostedcorrados]

he still hasn't got another job? Tell him to finish that corrado or get a real smart and get a real car.

[SierraNevada40]

he still hasn't got another job? Tell him to finish that corrado or get a real smart and get a real car.

I tell him that all the time. So much time/money into a front wheel drive, when he has a Miata that needs more power. Oh well.

[a32guy]

I want a tv in my garage

[SierraNevada40]

I want a tv in my garage

Haha, we had marathons of the office, family guy, and seinfeld. Torrents FTW

[HiProfile]

I want a tv in my garage

I'd settle for 3 bimmers in my garage instead.

Spool time may suffer a tad, but thats still 1.4-1.6L per turbo (assuming a 2.8-3.2L), and they are small turbos too. The benifit is during boost, you don't have exhaust starting to vent on one cylinder while another is experiencing overlap, causing reversion. Turbo engines usually see 2-3x the pressure in the exhaust manifold as the intake, so during overlap you want to minimize any added backpressure if possible. This is why a larger AR divided housing makes more power and spools sooner than smaller undivided housing turbo.

[SierraNevada40]

I'd settle for 3 bimmers in my garage instead.

Spool time may suffer a tad, but thats still 1.4-1.6L per turbo (assuming a 2.8-3.2L), and they are small turbos too. The benifit is during boost, you don't have exhaust starting to vent on one cylinder while another is experiencing overlap, causing reversion. Turbo engines usually see 2-3x the pressure in the exhaust manifold as the intake, so during overlap you want to minimize any added backpressure if possible. This is why a larger AR divided housing makes more power and spools sooner than smaller undivided housing turbo.

Good info, thanks!

[coltboostin]

Turbo engines usually see 2-3x the pressure in the exhaust manifold as the intake, so during overlap you want to minimize any added backpressure if possible. This is why a larger AR divided housing makes more power and spools sooner than smaller undivided housing turbo.

They shouldn't!

If your at a 3:1 ratio-your doing something very wrong! (or, and just cranking the piss out of an overly inefficient set up) My Colt never ventured much over 1:1, @708whp

[95M3032679]

Any updates?

[chebimmer]

Hey, just noticed this thread. Props on a very cool project.
I thought I saw a loud E30 driving the other day out of the corner of my eye
Good luck with it all.
E

[Silex]

Oh noz it's for sale as of the middle of February! How come?! Did you ever finish this project?

[Wes1311]

I apologize for bringing this thread back from the dead but, what did you do in regards to the wastegates? I am doing a similar build on my e36 but I can't find info on the wastegate pressure or getting a second wastegate for the second turbo.

Sent from my SM-N920P using Tapatalk

[E36Mylo]

Awesome build man. Love these cars.