Author Topic: Supercharger (Read 6175 times)

haledj · « **on:** September 08, 2006, 02:46:02 PM »

has anyone considered a DIY supercharger insted of a kit? This is a project I would like to tackle. I would like a setup like the DASC, but in no way could I spend over 3000 dollars on my car. I would like to use the MB m63 supercharger.

What are your thoughs on this?
are there any problems I would have that would present major issues?
thanks--doug

aaron_silva · « **Reply #1 on:** September 08, 2006, 03:22:58 PM »

I think a lot of people will note the lack of knock sensors when appling forced induction on an M42. With proper tuning, it shouldn't be a problem.

I would suggest to lower the compression ratio since the M42's are a tad high and you would need some pretty good fuel (not really feasable here in CA).

Aaron

asubimmer · « **Reply #2 on:** September 08, 2006, 04:14:30 PM »

go for it, personally I like turbo's better but it just depends on what you want. Don't worry about not having knock sensor's, its not a problem.

Euro Nation · « **Reply #3 on:** September 08, 2006, 04:52:31 PM »

blablabla... factory knock sensors can bite my white butt.

1. The engine has to KNOCK in order to make use of them
2. If it's properly tuned for the range of 2500-4000rpm, where you're making torque and would really like to know what's going on.. then it will automatically be triggered by the timing chain harmonics at 4500rpm. If you tune it for 4500rpm+ then it's going to have to knock damn hard to get a response below 4500. I know... I have a standalone knock light in my car for tuning and I spend as much time tuning the damn light as I do the ignition map.
3. A properly fueled and tuned system wont knock. If you're dumb enough to keep your foot in the pedal after hearing it knock that's your problem.
4. DME175 isn't a learning system to a degree that it will change the advance map. ME7.5 (1.8t) is smart enough that tuners ride the knock sensors knowing that the system will tune timing down and store it in the internal memory until eventually you're tuned JUST under the knock threshold and all is perfect... until you reset the ECU.

For the supercharger question... there were some guys on ebay selling homebrewed M42 kits using Nissan Xtera superchargers which seemed to fit pretty well. Another option is the Mercedes M62 since it's based on simple flanges and has some nice mounting bosses.

haledj · « **Reply #4 on:** September 08, 2006, 05:13:39 PM »

thanks guys I still have some research to do to finalize plans.
My project was going to be kind of a replica DASC. They dont change any tuning and that is what I am shooting for. Stock software and internals with relitively low boost.

Euro Nation · « **Reply #5 on:** September 08, 2006, 05:26:19 PM »

They run a FMU. I'd think about upgrading to a Walbro 190 and perhaps some 19lb injectors since their kits run a hair on the lean side if you stick with the FMU.

I'd probably run an SAFC or something similar with some injectors in the 28lb range without the FMU if it were me.

asubimmer · « **Reply #6 on:** September 08, 2006, 08:57:47 PM »

I may be selling my paxton FMU b/c I am prob going to use MS.

Euro Nation · « **Reply #7 on:** September 08, 2006, 11:33:30 PM »

Good plan!! After the talk of turbo chips and such I did some datalogging and found that the stock M42 uses 97% of the AFM door movement at WOT. So putting boost to it would render it near un-mappable since you'd be in areas that the AFM can't possibly see.

nuvolarossa · « **Reply #8 on:** September 16, 2006, 12:44:27 PM »

Quote from: haledj

has anyone considered a DIY supercharger insted of a kit? This is a project I would like to tackle. I would like a setup like the DASC, but in no way could I spend over 3000 dollars on my car. I would like to use the MB m63 supercharger.

What are your thoughs on this?
are there any problems I would have that would present major issues?
thanks--doug

Hi, I'm from bf.c. I'm doing a custom eaton supercharger kit on my m44.
I have a MB m62 supercharger, a 330d e46 intercooler, k&n air filter, cartech/begi rrfpr... and a lot of work... it's too difficult for me... I can't get the s/c belt to be aligned perfectly to the main engine pulley...
I'll let you know more...

Alpine003 · « **Reply #9 on:** September 19, 2006, 02:41:56 PM »

The mb sc is a good size for our displacement. Another option to consider is the Ford Thunderbird sc, although it is older but might be easier to find if you're doing a junkyard type sc kit.

bmwman91 · « **Reply #10 on:** September 20, 2006, 10:19:51 AM »

The Ford Thunderbird SC unit is HUGE. My father used to have one. It was a large unit, and the way the inlet/outlet ports are positioned it owuld be a challenge routng all the piping on the M42.

nobrakese36 · « **Reply #11 on:** September 21, 2006, 01:36:36 PM »

use a nissan blower(eaton), then mount a plate to the bottom half of the two piece manifold, alomost a DASc

Jtuner · « **Reply #12 on:** September 29, 2006, 03:19:23 PM »

I'm pretty interested in how this would work.. As I look at the MB m62 I'm wondering,, how would it mount? custom fab. brackets? How would you run the electronics of it? Also, how would you spin that pulley with our V type belts? Just curious,, I'm guessing you guys have this all figured out already lol