Eaton M90 supercharger Question

[Off Road SHO]

I still maintain my stance that I would buy this if you build it. I'm dont trying to set records but I do want a little more go in my sho

The problem is cost. The machinist's time is what kills me.

Let me go get a pic or two.

The 2" spacers to keep the bottom of the new plenum above the fuels rails:



Looking down on them:



With the plastic template of the base sitting on top of the spacers:


Without the sides of the plenum, but with an M-112 resting on top:


Tom

 

[rubydist]

The other thing that generally gets overlooked when bolting on superchargers is that intake runner length is still important even with forced induction. The 2" spacers that Tom has built are very nice looking, but they are also very short - shorter than the secondary runners in the stock intake manifold, which will tune the torque peak at some value higher than the second peak in the stock engine. Part of what you gain by piping the air around to some intercooler is that you can retain the tuned intake runner lengths that the factory boys worked so hard to achieve.

On the other hand, with Tom's design, you have 6 perfect locations to inject alcohol for charge cooling - right after the blower where the air is hottest and turbulent as heck for quick evaporation and excellent mixing.

 

[SHO U UP]

Those billet risers look kinda familiar there Off Road SHO.

 

[Off Road SHO]

Wow! You made yours out of solid pieces for each side. I bet that took a lot of measuring. Very nice. So, what were those for, hmmmmm?

Tom

 

[sho_sc]

The other thing that generally gets overlooked when bolting on superchargers is that intake runner length is still important even with forced induction. The 2" spacers that Tom has built are very nice looking, but they are also very short - shorter than the secondary runners in the stock intake manifold, which will tune the torque peak at some value higher than the second peak in the stock engine. Part of what you gain by piping the air around to some intercooler is that you can retain the tuned intake runner lengths that the factory boys worked so hard to achieve.

In addition to the raised torque peak harmonic, you have multitudes of enharmonics to deal with exasperated by the near-by rotating screws. Talking about a mathematical nightmare to figure out!

On the other hand, with Tom's design, you have 6 perfect locations to inject alcohol for charge cooling - right after the blower where the air is hottest and turbulent as heck for quick evaporation and excellent mixing.

or a big shot nitrous wet kit!

 

[SHO U UP]

Wow! You made yours out of solid pieces for each side. I bet that took a lot of measuring. Very nice. So, what were those for, hmmmmm?

Tom

Tom,
Look under "Force Fed V-8" under the V-8 SHO performance upgrades. Doug had created my Gen 3 blower kit and his machinist carefully crafted those bad boys.

 

[CplPflummUSMC]

Off road sho: Where did that M112 come from? Mustang, lighting or orther? Is it going on the other woman? If not how are you getting it to fit under the hood? From what i have read the M112 from some cars has a higher rise so that the water to air charge cooler can fit between it and intake which would make it very difficult to mount in an under hood setup. By chance whould you be able to post the dimesions of that M112? I figure i can use those numbers and make a block of wood or something to start coming up a rough idea of how big it is and where it can be mounted. I have decieded to just bite the bullet and pony up the extra coin for an M112. They can be had for 500-600 vs 300-400 for a poprted Gen III M90 that still won't flow enough and creates a ton of extra heat due it being spun so fast to get all I could out of it. Thanks again for your time and info.

 

[CplPflummUSMC]

Another thing that I need help with would be what parts would need to changed/upgraded. This is what I have come up so far, but I am sure that this will look very amatuerish. Sorry for the ignorance.

Larger MAF
Bigger injectors
Better fuel pump
assorted piping and hose/ hose connectors

I know I am rookie, but that is why I seeking your tutelage.

 

[SHO U UP]

Another thing that I need help with would be what parts would need to changed/upgraded. This is what I have come up so far, but I am sure that this will look very amatuerish. Sorry for the ignorance.

Larger MAF
Bigger injectors
Better fuel pump
assorted piping and hose/ hose connectors

I know I am rookie, but that is why I seeking your tutelage.

Let me step in since for Tom real quick. That M112 is off a 1999-2000 model year Lightning. It has a top mount plenum that will make it much taller than that too. I'll show ya a pic of one of my old ones. You will probably want to stick with a 2003-2004 Cobra's blower due to its inlet and stature. As for upgrades, look for a 90mm MAF, 42# injectors (at a minimun), a Warlboro 255 fuel pump and of course the piping and hoses you mentioned too. A deep wallet never hurts either.

 

[Off Road SHO]

SHO u Up, thanks. In my application, there is no hood so height is not a problem. There are so many Cobra guys that went to turbo that you should be able to pick up an M-112 from some of the speed shops local to you.

In addition to what you have already figured out and has been expanded on by others, I would also suggest a REAL fuel pressure rgulator and also converting the SHO's loopback single rail fuel system into a dual feed/ dual outlet system.

And as far as trying to get it to fit under a stock hood, by the time you spend all the money getting the engine supercharged, intercooled, sprayed, fueled, and tuned, a custom hood with a bulge will be peanuts in comparison.

Tom

 

[HotRodKid]

The problem is cost. The machinist's time is what kills me.

Let me go get a pic or two.

The 2" spacers to keep the bottom of the new plenum above the fuels rails:


Tom

why not switch to some 1/4" plate to form a plenum area on each side of the fuel rail. the whole thing could be waterjet cut. Throw some bolts in a stock head and cross measure between all the bolts with some calipers to find the needed spacing between each runners sets of bolts.

then rotate all the bolts a 1/2 turn and double check your measurements.

The HBB cad file i have is all done w/ cross measuring, so yes i know how much work it is. but i cross measured till all my #'s check out to within .003 on all but one hole-to-hole measurement ... that one is @ .005"

 

[32MTX]

this thread makes me have dreams of one day putting a blower in the v of the engine, running a different intake manifold with the supercharger mounted on top of it, and closing the hood...

 

[Off Road SHO]

this thread makes me have dreams of one day putting a blower in the v of the engine, running a different intake manifold with the supercharger mounted on top of it, and closing the hood...

And fixing the tranny again and again and again....

Tom

 

[somedude_001]

SHO u Up, thanks. In my application, there is no hood so height is not a problem. There are so many Cobra guys that went to turbo that you should be able to pick up an M-112 from some of the speed shops local to you.

In addition to what you have already figured out and has been expanded on by others, I would also suggest a REAL fuel pressure rgulator and also converting the SHO's loopback single rail fuel system into a dual feed/ dual outlet system.

And as far as trying to get it to fit under a stock hood, by the time you spend all the money getting the engine supercharged, intercooled, sprayed, fueled, and tuned, a custom hood with a bulge will be peanuts in comparison.

Tom

now that I have felt what big power on a SHO is like I just want that nasty throttle response that can only come from a PD blower. not looking for huge power #'s. reliability is fun.

 

[SHO U UP]

And fixing the tranny again and again and again....

Tom

Knock on wood, but my built AX4N is going strong with my blower on the V-8.

 

[CplPflummUSMC]

Anybody got the size specs on a Mustang M-112? Would I be able to use the standard air to water charge cooling or would make the unit to tall? Any ideas on where a M-112 could be mounted besides on top of the intake. By the way I am picking up a bored fuel rail with 44lb injectors along with a lighting 90mm MAF on monday. Now that I have spent some money I guess I will really have to commit to this crazy idea. keep up the good info. Thanks again and Semper Fi!!

 

[LOUDSHO92]

Well Tyler's M90 setup (On Geek SHO now) poked though the hood quite a bit and that was with an intake only.

So it will poke though the hood a lot.

 

[Off Road SHO]

Unless you mount it to the front side of the block. You could probably design it so that you don't lose your AC for all you sissies out there. All it takes is mad fab skills and or money.

And transmissions.

Tom

 

[Sho Amo]

I dont understand peoples fascination with PD blowers. I have driven lightning's and gtp's so i know how it feels but why all the hassle just for that? I mean, a properly sized turbo would do the job very well.

 

[St Louis SHO]

Turbo=tq
Sc=HP

I'm done breaking transmissions....