MyE28.com

my dad is a cool guy, theres no doubt about that. we have an m90 supercharger sitting in the garage, and he said i could have it.

score.

so Anyway, i would like to get this going. yet i have no plan of attack yet.
so heres how far i got:

pulley off the crank
make up a mounting system
plumb some form of intake
deal with fuel

at 8:1 and stock internals, will I need an intercooler for 8 psi? How high can i go non-intercooled? And for a supercharger, would it be worth it?

also, will i be needing bigger injectors? a piggyback ecu? Or since a blower has a linear throttle response, will a rising rate fuel pressure regulator be enough to keep it fed?

Has anyone done anything like this? How did it go?

Soco wrote:Has anyone done anything like this? How did it go?

Search the archives for the word "Eaton."

that answered some questions, but not all of them. If any of you feel philanthropic enough to help a punk kid out, then please answer my humble questions...

1: Will a Rising rate fuel pressure regulator be enough to take care of the fuel requirements? I like mechanics more than electronics, even if they are a bit less precise. Do you think it will work at sub-9 pounds of boost? Also, how well will the stock fuel pump and injectors handle this, and where can i find a higher flow setup?

2: Can the motronic handle everything here? What will I have to change, if anything, relating to spark? Also, will the rrfpr take care of fuel alone, or does the motronic have to be reconfigured/ditched in order to figure whats going on with fuel?

3: Is 8 pounds of boost (on the 8:1 usa motor) on stock everything with no intercooler asking for trouble?

Basically, is this a bolt-on-blower-and-rrfpr project, or is there a lot of engineering involved? I mean, im not looking for anything tremendous here HP wise. I saw someone talking about a manually linked bypass valve. Do I need to do that, I thought eatons had one in them already.




heres the basic plan. Eaton on intake manifold, throttle body upstream. Stock motronic (probably a d'silva chip) and a rrfpr.
in general low boost. Nothing special otherwise with respect to fuel and spark.

so, im sure that wont work, its too easy. But can someone tell me how close I am to a design that would function?

Soco wrote:that answered some questions, but not all of them. If any of you feel philanthropic enough to help a punk kid out, then please answer my humble questions...

1: Will a Rising rate fuel pressure regulator be enough to take care of the fuel requirements? I like mechanics more than electronics, even if they are a bit less precise. Do you think it will work at sub-9 pounds of boost? Also, how well will the stock fuel pump and injectors handle this, and where can i find a higher flow setup?

2: Can the motronic handle everything here? What will I have to change, if anything, relating to spark? Also, will the rrfpr take care of fuel alone, or does the motronic have to be reconfigured/ditched in order to figure whats going on with fuel?

3: Is 8 pounds of boost (on the 8:1 usa motor) on stock everything with no intercooler asking for trouble?

Basically, is this a bolt-on-blower-and-rrfpr project, or is there a lot of engineering involved? I mean, im not looking for anything tremendous here HP wise. I saw someone talking about a manually linked bypass valve. Do I need to do that, I thought eatons had one in them already.




heres the basic plan. Eaton on intake manifold, throttle body upstream. Stock motronic (probably a d'silva chip) and a rrfpr.
in general low boost. Nothing special otherwise with respect to fuel and spark.

so, im sure that wont work, its too easy. But can someone tell me how close I am to a design that would function?

1. Stock injs wont work past 6psi, not enough even with a FMU. You'll 30lbs, FMU and software for the 30lb injs. Stock fuel pump will be OK to 11psi. Over that, you should upgrade to larger.

2. See #1. You'll need software from TCD for the larger injs and timing changes. Or, you can use a MSD 6btm(or the one that retards timing based on boost). The problem with these is they retard too much at higher boost levels and are not as configurable as you would want it to be. Otherwise, the Motronic is fine.

3. It may be OK. Im not sure how badly the temp rise is with a TS eaton. 6-7psi is definatley doable w/o IC.

Yes, you need a BOV. If its integrated into the TS, then your OK, if not, you HAVE to have one.

The biggest issue is mechanical. Getting it hooked up and not be ghetto will be the biggest hurrdle.

RussC

ok, so i need bigger injectors, a bigger pump maybe and to talk to tcd about the stuff for the ecu to handle these things.

so in addition to that i also need a rrfpr. So how does one set these, trial and error? Also, can i run the throttle body and afm upstream of the blower? the afm will be pinned quickly, so it wont compensate for the extra air being thrown in, the rrfpr takes care of that, right? And other than what I mentioned, everything else stock can handle it, right?

Sorry for being such a n00b, I told you guys, this is a whole new world for me.

For the FMU, your hook up a pressure gauge to set it initally, then tune it as you drive with a Wide band O2(perferably) or by ear/NBO2. So yes, trial/error.

The AFM needs to be upstream of the SC. It to will need spring tighning to meter the added air properly. It is fully adjustable that way.

RussC