I've got a lot going on with my car this fall. Insurance is off and she's parked for the rest of the season and winter while so i can do everything i want.

I plan to redo my stereo and make it much much cleaner than it was before with many more little details finished- this i can handle and have no questions about- unless anyone wants help with audio stuff then hit me up.

My air-water set-up has been working well enough and i plan to run a nitrous/fuel injection set-up using a nitrous wet kit. I'm only planning on running a 50-75 shot. I understand that my elevated fuel pressure will require some tweaking of this system etc. and have a handle on that. My current questions- how should i activate the system- do we have a tps signal or will i have to use a mechanical switch? where would you inject the nitrous/fuel? Can i run it all through the blower? it seems liek doing so would result in the best gains as if i can keep the air cool there it will translate to more air in the motor right?


I'm going to be pulling just about all the visible stuff i can out of my engine bay and having it powdercoated by a friend. Anyone have a write-up for pulling the upper intake and valve covers? nitrogen you still want to sell me that intake? anyone have instructions for taking the eaton apart/info about what to use for oil in it (oil has to be removed to pc it)?

if i want to up my boost 1.5 psi or so... what do i need to do to my pulley size wise? I can't go any higher than that without overspinning this blower correct? I know i should also consider planning on having to pull some timing with all of this- but not sure it will really be needed. can i have this done locally at a machine shop? or should i send it somewhere?


lastly, i'm also going to be making a new custom hood out of a carbon fiber one i just purchased. I will likely be venting it with louvers on each side in the front and some kind of a elongated oval vent in the rear center of the hood. Any ideas for where to pick up appropriate louvers or vents to mold in? I like the gt500 ford louvers and possibly the vent off the back of the E46 m3 hood.


hope you read it all and help me as you can

also, now that everyone knows what i have planned- i'll post some pictures as i go... hope i can do everything up to the highest standards, i don't intend to have to redo any of it for a long time.

 

Can't comment on the nitrous setup as I know little on the subject. To start with the pulley topic I'm currently using a 2.625 and assume yours is the same? I make just a tick under 5psi under full throttle. It should be stamped on the face of the SC pulley. Looking around at various models that use our blower and similar MP112 maggies I've never seen anything smaller than 2.6" if I recall. That said I'm certain that sending out our SC pulley to be machined down is the only method. In terms of spinning the SC too fast I'm not sure what the threshold is with diminishing returns. I'm also not familiar with any generic equations to figure out -/+pulley radius = -/+ boost. If I was to shoot in the dark though I would start with maybe 2.5" and go from there. I'd like to eventually increase my boost level to maybe 6-6.5lbs or so. I would also consider installing a 100mm idler where the HPS supplied 90mm idler sits now to increase belt wrap. There is also the option of moving it an inch to the left with the other supplied mounting hole next to it. Doing both would help wrap the belt a good amount more around the SC pulley.

I've decided that when I'm ready to do this I'm going to send my blower out to stiegmeier and have it blueprinted, rebuilt, polished, rotors stripped, and they can machine the pulley their at the same time. They quoted me a great price of around $495ish I thing and would clean and flowmatch my injectors at the same time for an extra $100. I would consider having the blower rebuilt and blueprinted if you plan on spinning it much faster.

 

yeah, i only plan on going to 6.5-7 psi as well. i'm sure we currently have the same pulley size.

Steigemeier doesn't answer their phones lol- but i'll try some more.

 

i agree about rebuilding the blower and making sure its straight before stressing it.

is 2.625" the diameter?


so we all know that if you shorten the circumference of the pulley, and the belt is moving at the same speed it always has, then your revolutions per min will go up. the proportion can be computed easily. if anyone knows the diameter of our crank pulleys and what RPM range the CP spins at, i could compute with ease what diameter it would need to be in order to increase your boost to your desired level. it will come down to how many RPM's the SC pulley spins at, which can be calculated via beltspeed, which is provided by the CP.

the easiest way to find out is to do some research on what RPM gains will give you corresponding boost gains... after that its very simple math, just take into consideration the beltspeed at WOT and calculate which circumference will give you the revolutions you need... for example if beltspeed is 49.5"/s and your pulley diameter is 2.625" (thats 8.247" circumference) then your S/C will be spinning at 6 rps... thats 360rpm's....

sorry if its complicated but the math is simple, you just have to find out the ratio of boost at varying RPM ranges. or if you have a boost guage, cruise at low rpms and note the boost pressure, then coast at 5500 rpm's and note the boost pressure. report these values back to me and i can tell you exactly what diameter your SC pulley would need to be to provide you with the WOT boost you desire... of course i will still be needing the CP diameter and CP rpm range....

 

it actually makes almost full boost down really low rpm wise... i know from my tuning time that such a relationship will be had to determine

 

youll be fine with the nitrous i wouldnt go above 50 shot dough.

 

did steigemeier actually say they would machine the pulley and included that in the cost?