couple of questions about the DASC

[mohaughn]

Yes. You could run 14.5PSI on the engine with the proper tune without even doing what you said to the engine. Assuming you work out the cooling properly.

I've yet to see somebody run over 10psi though as the cooling is a really big problem on the DASC.

If you want to run 14-15PSI you would be better off finding a custom FI builder in your area and have them do something that is completely designed to do that. The DASC was not designed to run that much boost. You can do it, but you will spend almost as much on the cooling system and the tune as you did on the supercharger itself.

[318iS]

Originally Posted by mohaughn

Yes. You could run 14.5PSI on the engine with the proper tune without even doing what you said to the engine.

i kno but i would rather do them to be on the safeside and plus they have their own benefits and power gains....

I've yet to see somebody run over 10psi though as the cooling is a really big problem on the DASC.

really i could have sworn i saw a few people runnin 12psi... well anyway i could be the first


anyway im not planning to do this overnight i plan to have this car for a very long time and make it as powerful as i can down the line....



anyway what would be a good cooling system....

i was thinking a front mount intercooler and getting water injection... would this be enough ? or would more be needed....

[316i compact]

You cannot add a front mount intercooler on the dasc, except if you find a way to put it between the compressor unit and the inlet manifold, and then make a vent on the hood to feed it with cold air, like the Mini Cooper S. If you do it, you'll solve the biggest problem with the DASCs!!

[mohaughn]

Yup.. The m42 and m44 can definitely handle more boost, but I don't think you are going to get it with a DASC. I'm not sure the exact revolutions that the eaton blower would be spinning at to produce 14 PSI, but it would be a lot. If you don't figure out a way to cool off the casing of the charger you are going to be blowing really really hot air into the engine. What is known as heatsoak. If you don't cool off the charge air you might as well not even have the supercharger.

But I would think that along with an intercooler for the supercharger you should also consider a larger higher capacity and more efficient radiator, and an oil cooler.

Any systems I've seen on BMW's running high levels of boost are twin screw systems that are designed to have intercoolers, aftercoolers, or water injection. That is not the case at all for the DASC. For the money you would be better off doing something custom.

[saintly]

If you want to custom the engine that much then i think you would be better off running a roots blower rather than a DASC. the roots would give you easy access to add the intercooler which would be a must with that much boost. something like this (http://www.alsperformance.com.au/gal...p?g2_itemId=99) as seen on my friends 318ti would work well. much simpler.

[316i compact]

Τhere are choices out there about the radiator and the oil cooler... The big prob is the intercooling about the dasc!
I would suggest to you all doing sth:
Find people from BMW forums which have DASC, make a group buy/list of people that WILL buy it, and ask a reputable tuner to develop an air-to-water air cooler fit and work in the DASC setup.

[mohaughn]

Originally Posted by saintly

If you want to custom the engine that much then i think you would be better off running a roots blower rather than a DASC. the roots would give you easy access to add the intercooler which would be a must with that much boost. something like this (http://www.alsperformance.com.au/gal...p?g2_itemId=99) as seen on my friends 318ti would work well. much simpler.

Did you mean a rotrex blower? The dasc uses an eaton roots blower.


Last post I make in here because we are covering ground that has been covered many many times before. ZeroG was designing a kit for a DASC intercooler. There are a lot of people on here that have DASCs on their cars and I don't think there was very much interest at all for what ZeroG was designing. You are going to spend a few grand doing it right with the DASC on top of what the DASC costs. For $6k you could easily find a custom tuning shop and have them put in a 15psi supercharger system with tuning and the cooling system to support it.

[saintly]

Sorry, my brain fade.. we (DASCed cars) have the roots, my friends is a centrifugal.

[pdxmotorhead]

Ford lightnings use the M112 Eaton and run a intercooler(Water to air).
Its between the blower and the intake manifold, if you wanted to
bump to a M92 you'd easily get the psi your after. And the M92 is
very close to the same size as a M62.
Would be intersting to see if it would fit the DASC manifold with a intercooler
as an adapter.

Just mental gymnastics....

Dave

[318iS]

ah god damn ti its a good thing i asked the damn question before buying the dasc.....


problem is round where i live i dont think i will find anyone who specialises in supercharger equipment.... its all about turbo here....


the only thing i could do is buy a kit from the states where it seems to be happening.....


i'm goin to read about a few other kits now.... i'd love something like ess or vf do for the 6 cylinders cos they come with intercoolers.....


damnit... if anybody wants to point me in the right direction... i only have 3 months if i want free shippin from the states so i need to find something cos there is no way i'm havin a stock motor by the end of this summer....

[mohaughn]

If you don't have anybody around you that could do it just go ahead and buy the DASC... Then get yourself a good exhaust, lighter flywheel, clutch, differential... Once you start needing more power get the Stage3 kit and run more boost... It won't get you to 15PSI, but it is a tried, tested, and proven system that a lot of happy 318ti drivers use every day. Maybe in a year from now with the jump in people that are getting the DASC somebody will come up with a good cooling system for the kit.

If that ends up not being enough for you you can always sell what you have, a used DASC and stage3 tuning kit would still be worth a good amount and then go for something custom... I'd imagine a Ti with somewhere around 200Hp and still the lightweight engine is pretty quick.

[318iS]

Originally Posted by pdxmotorhead

the M92 is
very close to the same size as a M62.
Would be intersting to see if it would fit the DASC manifold with a intercooler
as an adapter.

will look into this....

it makes sense....

Originally Posted by mohaughn

If you don't have anybody around you that could do it just go ahead and buy the DASC... Then get yourself a good exhaust, lighter flywheel, clutch, differential... Once you start needing more power get the Stage3 kit and run more boost... It won't get you to 15PSI, but it is a tried, tested, and proven system that a lot of happy 318ti drivers use every day. Maybe in a year from now with the jump in people that are getting the DASC somebody will come up with a good cooling system for the kit.

hopefully someone will cos after looking around i have decided i will get the dasc in june if nothing else comes along by then (doubt seam still exists anyway ? ? ? pity cos it looked like the real deal)....

i'll try to make do with whats available....






does anybody have an installation manual for the dasc that they dont need anymore and would like to sell it to me ? ? ?

i need it for some research...

[DustenT]

You can run water/methanol injection if you run it after the blower. If you can find away to mount the nozzle so you get a uniform mixture across all 4 cylinders, you'd have it made. The problem is that the manifold is so small that it's almost impossible.

DASC manifold:

[318iS]

Originally Posted by DustenT

You can run water/methanol injection if you run it after the blower. If you can find away to mount the nozzle so you get a uniform mixture across all 4 cylinders, you'd have it made. The problem is that the manifold is so small that it's almost impossible.

dusten i taught you were running water injection ? ? ? how did you make it work or is there uneven amount of water going into each cylinder ?



p.s.
*** anybody have a dasc install manual for sale ? ***

[DustenT]

Originally Posted by 318iS

dusten i taught you were running water injection ? ? ? how did you make it work or is there uneven amount of water going into each cylinder ?



p.s.
*** anybody have a dasc install manual for sale ? ***

I was, but then I ran the wrong kind of alcohol in it and stripped the coating off my blower. I was spraying BEFORE the supercharger. When I sent my supercharger in to get rebuilt I had a nice long discussion with a couple supercharger experts. The DASC Eaton m62 doesn't use sealed bearing and it meant to NEVER see moisture. Spraying before the blower can cause all kinds of problems, including cleaning the bearings of all their grease. They need lube since they spin at 100,000's rpms.

Here is a video showing the damage: http://180customs.net/video/DASC-Rotors2.wmv