M30 turbo build

[QBANG]

Otis or anyone else,
I wanted to get your input on the setup Im looking to build. Im shooting for 400+ hp will the HX40 be my best bet? How about housing size will 16cm make me spool late? Ill be running stock b34 botto ith stock b34 head. Will 42lb injectors get me to my goal? Anyone know of where I can pick up a HX40 in need of a rebuild? I got a quote of $850 for one already rebuilt.

[Good & Tight]

Otis,

I was planning on just bolting them to my spare head (it's busted beyond repair and I got it for $25)...will that be OK??

That's how I do it also, bolted to the head but still weld the piece in and leave it in.
Reason for this is after a few heat cycles running on the car they will pull together, I experienced this when I first went to pull mani. Not that it wouldn't come off but I had to pry it off.

[Good & Tight]

Otis or anyone else,
I wanted to get your input on the setup Im looking to build. Im shooting for 400+ hp will the HX40 be my best bet? How about housing size will 16cm make me spool late? Ill be running stock b34 botto ith stock b34 head. Will 42lb injectors get me to my goal? Anyone know of where I can pick up a HX40 in need of a rebuild? I got a quote of $850 for one already rebuilt.

HX40 is a perfect match for what your doing, 16cm is what I have in T4. My engine is a B34 also.
I would suggest 55# for some head room, what engine management are going to use?

[Lurker27]

Thanks for all the tips and guidance, G&T, your car is my inspiration and I know that is the case for many planning on turboing their M30!

I scored some 70# low impedance injectors so I should have plenty of room to grow.

[lashtx]

Yup

Thanks for all the tips and guidance, G&T, your car is my inspiration and I know that is the case for many planning on turboing their M30!

I second this motion. And now request a vote.

[QBANG]

HX40 is a perfect match for what your doing, 16cm is what I have in T4. My engine is a B34 also.
I would suggest 55# for some head room, what engine management are going to use?

Well injector size will force my pick. Miller chip supports up to 42lbs. So I'm going to go with MS. I need to read up on MS, I understand MS3 is about to come out. Should I wait for MS3 or just run MS2?

[Good & Tight]

Well injector size will force my pick. Miller chip supports up to 42lbs. So I'm going to go with MS. I need to read up on MS, I understand MS3 is about to come out. Should I wait for MS3 or just run MS2?

MSII will run the engine just fine plus the code has been out for awhile no need to be reflashing updated codes on a new realease.

[Lurker27]

G&T didn't you say you don't even bother with a variable TPS

[Good & Tight]

G&T didn't you say you don't even bother with a variable TPS

Yes, with MS you can run on MAP signal only, no TPS signal at all. If you have the TPS wired in you can run a blend of both in % that you can adjust to your throttle response.

[Thevertible]

Subscribed....

[Operator62]

I wish I could just get mine running n/a. :(

[Chachi]

definitely do a write up consider i have acquired an m30b34 w trans for free, and a tcd m30 turbo kit for cheap!

[kylekrueger]

Sorry everybody I have been really busy lately so I have not had much time to do any writing. But it sounds like there is a lot of interest in this and lots of support as well.

So far I have been only collecting parts and right now the current project is finding the correct turbo.

So far my research has concluded that there are a number of ways that one can go for turbos as well as many more options for the turbo itself once the desired turbo has been selected.

For my power goal of 350-400 brake horsepower there are a few options. The first of which, as Otis mentioned is the holset hx40x i believe. This turbo is generally liked by the e30 turbo community and is reasonably priced new and has come up in a few m20 build threads.

Another choice for turbo selection is a garrett turbo. A first choice for a garrett turbo for these power levels is the gt35r. This is a ball bearing turbo which allegedly will spool faster than a journal bearing turbo and not put as much ware on the components of the turbo. However, a turbo of this type is very expensive new and even on the used market running from roughly 1500 new to 900 used. Therefore, one option is to go with an equivalent journal bearing turbo such as the garrett 60-1 series turbo. these have just as much flexibility as the gt35r but at only around $500. Garrett turbos also have a huge support basis and compressor and turbine maps can be found everywhere.

One other option for turbo choice is a 3K turbo. These come in a number of different flavors from k27 turbos on the e23 and e32 745i to k24's and k26's on porsche 944 turbos and audi UrS4's. These are generally comperable to a lower quality garrett but usually are only availible used from OEM type applications on different cars. This can be good and bad. The good is that they can be generally cheaper to buy and sometimes are more readily available depending on where you look. The bad is that compressor maps are extremely hard to find and there is little or no support for them. however, sometimes depending on what car they came off of before parts can be readily available.

For my application I decided on either a lower quality garrett 60-1 series or two KKK k24 turbos. At the moment I am far leaning toward the two k24 turbos that are available. First, the fact that they are $300 for the both of them as apposed to 550 for garrett and second, I kind of want to try doing a twin turbo set up (I really don't know why, some of you will probably call me stupid and it is kind of a stupid idea but I wanted to do something a little different).

In the next post I will show how my preliminary figuring is causing me to lean toward the 3K turbos. Mind you, I have not purchased them yet so, so far my options remain open.



Sorry for the long post with no pictures to show for it


~Kyle

[JoeMadoo]

No matter what you get, you're gonna love it. It really depends on how much you want to spend and what kind of power you are looking for right now and in the long run.

If I had to do it all over again (which i might), I'd go for the HX40, tubular manifold, mls HG, etc... But honestly the k27 with the gt35r wheel on stock internals makes me incredibly happy.

[freeride53]

Hey Kyle, know its been a year, but have you turbocharged it yet?
Last time I saw your car was a while ago, we should do a drive some time soon!