Previa Supercharger on Gen 3 5SFE? - Toyota Nation Forum : Toyota Car and Truck Forums

curry.style · 09-16-2011, 12:08 PM

I have a friend who has a Previa supercharger he is willing to part with. I'm thinking about buying it to put on an extra engine I'm going to rebuild for the wagon. Anyone done anything like this? My plan is to run a similar fuel/timing setup to what is recommended for a low boost turbo. I would also be machining a new pulley to do away with the magnetic clutch setup and increase boost to around 8 psi. Any thoughts? This will be a winter project so I'm hoping to drop in the fresh engine next spring.

curry.style · 09-16-2011, 10:54 PM

Fifty views and no opinions? I was really hoping to get some input from someone running a turbo 5SFE, or supercharged if anyone is. If I can make this work I know the Previa guys would like a higher boost pulley. I'm also kicking around the idea of fabbing up a set of underdrive pulleys for the 5SFE since I can't seem to find a set available.

rusty9 · 09-17-2011, 07:03 AM

No even worth the time or effort. Different engine and the pile of junk only made like 20-30 hp.

curry.style · 09-17-2011, 10:34 AM

Ok... Can you tell me another way to snag an extra 30 hp out of a 5SFE? If you have a better/cheaper method of doing the same or better then please share. Also, what were your supporting mods, if any? Was the fuel system upgraded? Was any attempt made to squeeze extra boost from the supercharger? Sorry, but I'm just trying to get a feel for exactly how you went about this. An extra 20-30 hp just for bolting up the unit and running some pipes is pretty good for the effort involved.

White95Cam · 09-17-2011, 10:34 AM

I did some research on Wiki and it appears that the Previa has a 2.4L engine. I have seen a few complete superchargers for sale for the 5sfe but they were so expensive that a V6 swap would be a cheaper option.
W95c

curry.style · 09-17-2011, 10:49 AM

White95cam, you are absolutely correct! The Previa does have a 2.4L motor. However, the supercharger is not a manifold type supercharger. In fact, doing my own research, I found one article where one of these units was installed on a BMW 320i! In that application they opted to retain the electromagnetic clutch, so the extra power was on demand at the flip of a switch. Also, I found a link to this site that was a few years old and had a pic of one mounted in the stock a/c compressor location, but it was hard to tell what kinda motor that was on for sure. Looked like a 5SFE though.

White95Cam · 09-17-2011, 06:47 PM

Quote:

Originally Posted by curry.style

White95cam, you are absolutely correct! The Previa does have a 2.4L motor. However, the supercharger is not a manifold type supercharger. In fact, doing my own research, I found one article where one of these units was installed on a BMW 320i! In that application they opted to retain the electromagnetic clutch, so the extra power was on demand at the flip of a switch. Also, I found a link to this site that was a few years old and had a pic of one mounted in the stock a/c compressor location, but it was hard to tell what kinda motor that was on for sure. Looked like a 5SFE though.

Yes I figured that it was belt driven because a manifold driven pump is a turbocharger. Could you post the link for the pic?
W95c

oopssorryy · 09-17-2011, 09:00 PM

http://murileemartin.com/wordpress/?p=671

If it can be put of that BMW then you could do it.

curry.style · 09-17-2011, 10:00 PM

oopssorryy-That is the article I was referencing with the 320i.
White95Cam-Congrats! You know the difference between a turbo and a supercharger! I was actually referencing manifold type superchargers like the ones used on top fuel dragsters or old school small block Chevys where the supercharger bolts straight to the intake manifold or is part of the manifold. As that is not the case here, you can literally run the unit on any motor you can find a place to mount it.
Here is a link to the thread showing it mounted on an engine: Engine Swap Help - Camry Station Wagon

oopssorryy · 09-18-2011, 12:41 AM

You would probably need to find someone who has do it before you, or just do it yourself. There is no reason it can't be done, it's just how to mount it. I've heard of guy's mounting it on the 4A-GE in MR2s. Might want to start looking there?

curry.style · 09-18-2011, 01:56 AM

Yeah. I've got lots of scrap metal, a welder, and I work in a machine shop. The mechanics of doing it don't bother me. I'm more curious than anything about whether or not anyone has used a similar setup on a 5SFE, and what the results were.

Chris Crash · 09-18-2011, 10:44 AM

I'd go ahead and do it.

curry.style · 09-18-2011, 10:59 AM

That's kinda where I'm at. It's an extra engine so if I overboost it, it's not a huge deal and from my understanding you'd have to screw up pretty bad to overboost on a Previa supercharger.

oopssorryy · 09-18-2011, 01:35 PM

I asked one of the guys of MR2oc and this is what I got:

I tried to do that, but it wouldn't fit. In fact, I even had a Previa sc to play with but it just didn't work.

Not sure how the engine is configured in the Camry, but I remember at one point thinking of putting the alternator in the MR2 in " the Camry position" and then mount the sc where the alternator would otherwise be.

In other words, looking at the engine compartment from the front bumper of a Camry into the engine bay, where the timing belt is on the left (passenger) side and the tranny on the right (driver) side, you'd put the ac compressor at the bottom and the alternator on top, closest to the front of the car (the exhaust side of the engine) and on the back (intake) side of the engine mount the sc, assuming it would fit between the block and the firewall underneath the intake manifold.

The Previa sc has a clutch, so an on/off switch on the sc is a possibility, but IIRC that unit is very picky about having to be mounted in a particular "up" position.

The Eaton M-45 unit is much better -not only more efficient, but it doesn't care whether it's mounted upside down or whatever. Mine happens to be mounted above the ac compressor, with the discharge going up into a manifold I fabbed, from where it eventually finds it was to the throttle body on the opposite side of the engine. A guy in England put his sc in the same location as I did, but mounted it sideways, so the discharge blew over the valve cover toward the intake manifold.

White95Cam · 09-18-2011, 03:06 PM

Quote:

Originally Posted by curry.style

oopssorryy-That is the article I was referencing with the 320i.
White95Cam-Congrats! You know the difference between a turbo and a supercharger! I was actually referencing manifold type superchargers like the ones used on top fuel dragsters or old school small block Chevys where the supercharger bolts straight to the intake manifold or is part of the manifold. As that is not the case here, you can literally run the unit on any motor you can find a place to mount it.
Here is a link to the thread showing it mounted on an engine: Engine Swap Help - Camry Station Wagon

Oh yes I do know the difference. I had a Volvo 740 with a turbo and a Bonneville SSEi with an Eaton M62 S/C. I preferred the S/C because it did not lag like the turbo.
I have seen another arrangement for a turbo that mounted the unit in the rear of the car and it ran off of the exhaust system and the compressed air was run back to the intake. It was for a Corvette.

W95c