So my friend has an idea.

"Camry-Into-Canyon" (Camry-Into-Canyon) 09/21/2014 at 11:51 • Filed to: Superchargers, Forced induction

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How hard would it be to put an Eaton M90 from a 3800SC on a 4.6L Modular V8 (in a p71)? The Mod is a faily small v8, so displacement won't be an issue. Thoughts?

mcseanerson > Camry-Into-Canyon 09/21/2014 at 11:54

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Why no snail?

Jedidiah > Camry-Into-Canyon 09/21/2014 at 11:57

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You'd need a special intake manifold and special pulleys ofc.

Since it isn't carbed, you'd have to put bigger injectors and retune the computers.

Displacement isn't much of issue as compression.

The mod motor has a 9.36:1 compression ratio while the 3800sc has 8.5:1.

You might be able to get it work, but I don't of anybody who runs a supercharger with a base cr of over 9:1.

Nick, Drives a Cobalt LT > Camry-Into-Canyon 09/21/2014 at 11:59

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Probably would need some sort of plate to mount it and it'd have to be custom.

Just take dimentions off the M90 and dimentions off the 4.6 and have something milled or whatever for it, then something so the TB from the 4.6 can go onto the M90 or use the 3800 TB with some wiring tricks to get the TPS and anything else on the TB to work properly.

Not a nightmare of work, but some work.

Jedidiah > mcseanerson 09/21/2014 at 11:59

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Non-linear power band, complex exhaust tubing and cooling systems, heat soak.

They also make the a/f ratio rich as fuck.

mcseanerson > Jedidiah 09/21/2014 at 12:03

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Non-linear power band obviously, complex exhaust tubing and cooling systems: complex could be argued but you're going to have to do some custom work to make a supercharger work as well, heat soak: meh.

Turbo making the a/f ratio rich as fuck? That one I'm thrown off by. Are you talking about just throwing either the turbo or the supercharger on without doing any tuning because that's a bad idea period.

IDROVEAPICKUPTRUCK > Camry-Into-Canyon 09/21/2014 at 12:04

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Looks like it could require some custom fab
http://www.stangnet.com/mustang-forums…

GhostZ > Camry-Into-Canyon 09/21/2014 at 12:04

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Very easy . Roush has been using the M90 on the Modular engine for years.

http://www.americanmuscle.com/2005-roushchar…

For the price, there are bigger options available, but you can probably find a kit that doesn't include the supercharger itself and swap your own in using an adapter plate.

I've even seen an M90 bolted onto a 240Z, and that only required mounts, belt, a 4-barrel intake (yes, they make them for S30s) and an adatpor plate. So I can imagine it is not hard to do for a car that has had kits for them available for decades.

Jedidiah > mcseanerson 09/21/2014 at 12:11

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You'd have to tune it to run rich unless you want something to blow up for both superchargers and turbochargers.

Your computerized fuel system can only adjust it's a/f ratio at a certain rate. The variable intake boost, engine rpm, and exhaust pressure makes it harder to adjust the a/f ratio. Their will be moments in the rev range where it is really rich because it just can't keep up. This happens to an extent in natural aspiration, but turbo makes the effect more pronounced.

GhostZ > Jedidiah 09/21/2014 at 12:12

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If you run low boost (pulley ratio) and 91/93 octane you can swing it, I bet. But dished pistons would be a safe idea, since if you're going to supercharge the motor, I imagine you want new pistons anyway.

GhostZ > Nick, Drives a Cobalt LT 09/21/2014 at 12:15

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The lower-tier Roush Mustangs use the M90, so they build and sell an adapter plate for it. Intake plate should be the same regardless of whether its a 3V mustang or a 2V P71.

GhostZ > IDROVEAPICKUPTRUCK 09/21/2014 at 12:16

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That article is 7 years old. M90 kits have come out since.

The Transporter > GhostZ 09/21/2014 at 12:21

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That's for the 4V Modular, though. It won't fit on the 2V in a P71. Not saying that it can't be done, it just can't be done with that kit.

GhostZ > The Transporter 09/21/2014 at 12:43

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Why wouldn't it fit? Are the intakes that different? The M90 doesn't bolt directly onto the head, it bolts onto the provided intake on the kit, so a different head shouldn't be a problem if that intake still fits. This is just guesswork though, but does show there is support for the M90.

Textured Soy Protein > GhostZ 09/21/2014 at 12:48

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There's plenty of bolt-on supercharger kits out there that don't require new internals.

Textured Soy Protein > Camry-Into-Canyon 09/21/2014 at 12:50

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Given that there are a bunch of bolt-on roots blower kits out there that include things like intake manifolds, I'd say if you want to do a blower on the cheap the best route is probably to buy one of those kits, used.

The Transporter > GhostZ 09/21/2014 at 16:40

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The problem isn't the blower, it's the intake manifold. Here's why:

Up top is an early non-PI 2V head. Below is a later PI head like what you'd find on a P71.

<- That is a 3V head like the one that would fit the kit. Notice that the bolt patterns for the intake manifolds aren't the same, let alone the fact that the intake runners are shaped completely differently. The kit just wouldn't fit and there's no way to make it fit unless you fabricate a whole new intake manifold which kind of negates the whole point of the kit.

GhostZ > The Transporter 09/21/2014 at 16:43

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Ah, that makes sense. I thought the bolt patterns for the intakes would be the same.

V8Demon - Prefers Autos for drag racing. Fite me! > Camry-Into-Canyon 09/21/2014 at 17:27

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http://www.torktech.com

The Transporter > GhostZ 09/21/2014 at 17:29

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Nah, that's the thing about Modular engines, just because part A fits on block 1 doesn't mean that it will fit on block 2. As you can see, the non-PI intake manifold won't even fit on a PI head even though there may be only a year difference between the two. Hell, even if they're the same year there's no guarantee of anything. Engines made at Ford's Romeo plant have a completely different cylinder head bolt pattern from engines made at the Windsor plant and can't be swapped from one to the other.

Nick, Drives a Cobalt LT > GhostZ 09/21/2014 at 22:05

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Learned something new haha

I know the 2v and 3v top bits are the same, just depending on the PI and Non PI determines the intake routing.