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Old 01-06-2020, 01:48 AM
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Join Date: Aug 2016
Posts: 5
Supercharged M104.992

Hello guys ,

I was looking through the web and came across many threads where i found valuable info regarding boosting 104s.
but any bit of info will be a great help in my very low budget boosting quest.

I have a m104.992 I believe from a w210 retrofit to a 300e that used to have an m103.
Currently m104 bolted to a Getrag 5 speed from a 2.3-16 190E.
Any way,regarding the supercharger part. I have an SC14 from a Toyota 1gze laying around and currently I am thinking about bolting it to my engine.i am thinking AEM FI/C 6 for fuel and spark management.and planning to run at max 8 PSI.and planning to get custom long tube equal length headers made.

So,here are my main points where I have 0 knowledge.

1- bigger injectors. Do I really need them at 8psi? What bigger injectors will bolt right in? I have the green injectors on right now that came with the engine and I have a rail with a set of red ones, I read Some where they are 200 CC.does that make any difference?or do I Still need to go bigger?

2- fuel pump and regulator.I am assuming that is going to be needed? Right? will the raising pressure fuel regulator solve the small injectors issue?

3-what about vacuum auxiliaries and controls in the engine bay? Do I have to worry about that? How to over come?

4-will the 1.4 L SC14 be adequate ? Should I look for an Eaton M62? Knowing the M62 is only 1 L/rev will it be able to boost the 3.2 L engine to 8 psi without generating too much heat? or even cooking/over revving the SC itself?

Well,these are the question I have on my mind now.
I would really appreciate any help.

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Old 01-16-2020, 07:37 PM
Registered User
Join Date: Aug 2016
Posts: 5
after reading for a little more, I found Out EV6 Injectors from Ford Mustangs will fit our Fuel Rail and Provide more fuel.
combined with better pump and a raising Pressure Fuel Regulator with the larger injectors i think I am gonna be alright in this department.

my main issue now is narrowed down to the Super charger. Either go with the SC14 on hand or get an Eaton m62 Unit.
I read that the Eaton units with their twin Screw design is much better because of much less heat generated.compared to the straight flaps counter rotating in the SC14.

the thing is , will the 1L Eaton M62 be Enough to boost 6-8 PSI safely and continuously ?
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Old Today, 05:07 AM
sm. pelle's Avatar
Registered User
Join Date: Apr 2007
Location: Estonia, Tallinn
Posts: 46
M62 might be little on edge, i think m90 would be more reasonable.
For your power goals you dont need new fuel pump, oe will do just fine.
New injectors are definetly needed, at least 300cc+, bosch has some cheap ones. On I6 max hp=injector cc, by that you can choose them.
Im not sure what fpr m104 had but if it has usual fitting then some OE style 3.5bar will do that work, if it has 3bar from factory i wouldn't change that.
Main thing is that you get good engine managment, choose that by tuner who's closest or if you are going do to that by your self then MS, most online info available.
MB 300CE Turbo '88
MB 300E '86
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Old Today, 02:31 PM
Registered User
Join Date: Aug 2016
Posts: 5
Thanks a lot for chipping in, mate.
I am currently thinking about AEM FIC piggyback for cost reasons.
I believe the ev6 mustang injectors are 310cc.
I thought the raising FPR was a must.

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