DASC Exhaust, misc questions - Particulars

[Artem]

Hey guys,

As you may know, I will be installing a DASC on my 318TI (very) shortly, and I got a few questions in terms of modifications to the motor.

My plan is to take it out, do the headgasket, clean the head up and see if anything could use a refresh, maybe clean the valves up a bit.

The DASC thread called for using colder plugs and a different clutch, so I wanted to know if there is a clutch most recommend to use with the M44 motor; for instance, would an M3 clutch and flywheel bolt up to the crankshaft and work with the transmisison - is that a popular upgrade in FI?

Another question was the differential. I always cruise on a highway at a relatively high RPM, I know at 80MPH the car usually hits almost 4k rpm and that seems a bit high, so I was wondering if most people like to put a specific differential in there in place of a stock one.

My final question is the exhaust. That one was left open-ended on the sticky thread, so I wanted to know if anyone used a particular bolt-on exhaust in place of the stock one to get a better performance? My guess is the OEM is tuned for the stock air flow, and with that added airflow through the motor with the supercharger, the OEM exhaust will hinder the performance quite a bit, or perhaps I am mistaken?

Regards
Artem

[Artem]

No ideas, guys? Im trying to get a list of parts going fairly soon, so that I have all the rest of the parts when time comes to put the motor back in the car. The whole project should take no more than a few weeks beginning to end, and I really want to know what flywheel/clutch combo to use along with the exhaust.

What do those who have ~210RWHP use? im trying to leave some room for expansion/more boost without having to tear apart the car all over again to replace the flywheel, etc. Anyone?

[teen ti]

i'm kinda surprised that nobody has replied but it could be the fact that its a topic thats been gone over numerous times. search around and you should easily find multiple builds that will help you out

[Prince]

An M3 clutch should work (seen it in the UK), ut will be very heavy. My clutch seems to be holding up fine on my M42 though so haven't done the swap.

As for the exhaust, I've read that a 2.5inch (diameter) exhaust would be best.

[denglish318ti]

M3 clutch is almost the same weight as 328 and 318. M44 clutch will start to slip if you give it the beans.

[Artem]

Thanks guys! I got an emergency question.


Have to put the kit in asap due to unforseen circumstances, so I took it apart and got it ready for the supercharger...


Question is - what kind of banjo bolts/tube kit adapter did you use if you installed it? My kit did not have it.

Also - is there anywhere local where i can buy these things? Really want to finish it today.... :-/


Thanks guys!

[Artem]

Oh also turns out I have a smaller diameter hole for injectors (13.5mm) in the intake manifold, what sort of injectors do you think I can use?


Thanks!

[Artem]

Hello everyone,

I am in the process of putting a DASC in my 1998 318TI, but I ran into some serious issues, some of which I solved by machining new mounting bracket and PRV valve adapter, and getting the pink top injectors for the smaller injector hole diameter, but now I ran into a biggie, a serious biggie.

My kit that I got is for 1992-1994 318 M42 engines which was sort of a source of all the issues that I had on there... But now I find out that I need the following:

2.5" Pulley and a plate, which i'm sure noone would give up, however I want the OEM pulley that goes on the supercharger itself, mine is meant to be used on the older M42 engines and thus uses an older 4-rib belt, and is completely misaligned.

The newer is a 5-rib I believe, and is a bit more recessed into the supercharger.

So those of you who have upgraded the pulley - can I pleeeease PLEEEEAAASE have your old pulley????

I need it bad, like real bad....

THANKS GUYS!!!! I'll post a want-ad in here too...


Oh also - can someone measure the existing pulley plate if you have it in the newer 1997+ DASC modded TI, otherwise I have no idea where I need to drill the hole, I would ask Jim again, but I feel bad as I already got 2 of his drawings, cant keep bugging the guy for free...


THANK YOU!!!!

[Artem]

Hey again guys! So far so good, after installing the supercharger and sorting out the particulars, I ran into a no-start issue, most likely related to the fuel rail. Here are some pics for everyone's enjoyment

Also - I really REAALY need those banjo fittings part numbers or wherever I can get them from...


Thank you all for your support!

[Artem]

Some more pics.

[xxxJohnBoyxxx]

Ok here is my experience. Stock clutch will hold to 10.5psi of boost. When I ran 15psi I totally blew out the new stock clutch. I use a Spec 9# flywheel and stage 5 clutch. Banjo fittings can be purchased from Downing Atlanta ask for Jim Goodrowe. Jim will have a part number or the parts on hand.

Injectors shoould be stock 19# BMW or you will need EV1 style injectors with adapters that Metric Mechanic sells if you are running a tune and removed the RRFPR. I have pullies but I don't want to give them away, I won't charge you too much either. You can purchase any pulley you need from Pulleyboys.com. Stock pulley for 8.5psi is a 3.6", 3.4" will get you 10.5psi and 3.2" will give you around 15psi. You need Meth spray for intercooling and octane boost above 10.5psi. I know a lot about the DASC installed on the M44 motor and can help you more if needed.

If you want PM me your phone number and I will call you to answer any questions you might have. If I don't answer leave a message, I'm super busy on a new business venture and making websites as a side job so I'm on the phone a lot and busy all day long. I stay up late to help people so I hope you don't mind talking after 10pm EST.

Best of luck, John S

[Artem]

Thank you very much for the response John!!

Im almost there, I have the 3.6" diameter pulley now, expecting about 8.5 psi of boost (for the M44) and I have sorted out almost all the other issues I had, aside from the exhaust and all the stuff, expecting to install some rear subframe urethane mounts or something later as my subframe seemed to be making the proper noises to indicate worn mounts, but i will worry about the exhaust and mounts after the car runs again.

The only problem I have at last which prevents the car from starting is the fuel rail (from all Ive gathered)

The fuel rail im using is the older kind, with a fuel pressure regulator mounted right on it, as opposed to the newer kind with no regulator (since its by the 3/2 valve), as a result of which I think I want to use the stock 97+ fuel rail, which requires a use of banjo fittings and bolts, which I have yet to procure.

I'll look at the packing lists that Jim Goodroe sent me, to see maybe hes got a more or less generic part number listed in there as they seem to be out of most of the parts for the kits when I last talked to him.

[Artem]

Oh btw - I have the older style intake manifold, which was drilled for the smaller injectors, so I do not have to use adapters as a result.

I have the 21.5# injectors out of a 97+ M3/any other M52 based car.

(This proejct's makes me learn so much relatively useless info in addition to kicking my ass :P )

Any way I can make the throttle pedal about as stiff as the M3 one? Is that a pedal return spring or a throttlebody spring?

Thanks guys!

[Prince]

Something you should consider doing is getting rid of the plastic thermostat housing. They're prone to shattering. You can metal ones but as I'm UK based I can't tell you exactly where to buy from.

The stock M44 injectors should work fine.

Awesome info John btw. Really helpful!

[xxxJohnBoyxxx]

Lets talk. I called and left my number for you. I have solutions other then the banjo fittings and 21# injectors will not work with a stock tune. Your pulse (Number of injector pulses) and width (duration of open injector will be off unless your DME is tuned for those injectors. The car might be able to adapt to those injectors but will throw a adaption value error and open loop fuel mixture will be too rich.