250hp 7mge?
 

I have a '91 7mge with 132k miles. Recent HKS metal head gasket, timing belt, complete brake job, P-zero's etc. etc. The car runs great, but I'd like another 30-50 HP. I'd like to spend between 1500-2000. Has anyone any
experience with the FOS (fast on speed) electric supercharger? I'm an electronic tech, and can verify (technically) that what they've done is way way beyond the $99.95 crap they sell. I want to keep the cost to $1500-2000
Please don't suggest a turbo. I just sold a '91 MR2 turbo with 250k!

I would say a electrical supercharger is not practical for a automotive application, a motor powerful enough to pressurize a turbine would need a lot more draw and volts than what is available with one alternator and battery. I'm not saying you should drop all plans on it, it's your car and it's up to you, just look into it more before buying.

I just glanced over the FOS website and their electrical superchargers, they are designed for smaller engines, probably 1.1L max (1100cc), so even if you pumped them to the max you would not gain any noticeable horse power in a 3L engine.

I have a few suggestions, but I also have a question for you as well. Is the car a daily driver? If so then some of my suggestions would not be the best for that application.

If you want to get some more power you should consider getting a set of aggressive cams, and do a lot of head work. But if you chose to do the head work, then you are going to have to do another head gasket and it will drain your $1500 budget quick. In the end you would have a pretty bad ass GE that would rev like no tomorrow, but you would lose that smooth idle and some power at low end.

You could also do a custom intake manifold to point it strait forward, when you do that you could get yourself a larger throttle body and improve air flow, I would think it would lower your intake temps as well.

If you like superchargers, then look into centrifugal superchargers, and twin screw superchargers. The twin screw would require you to fab a custom intake manifold, but both superchargers would need some custom brackets and belt work as well.

My final suggestion would be what I do first before any internal/external mods to the engine. Get yourself a MAFT Pro, if you get that, then you can tune for almost anything.

Hope this helps, Good luck!!

I'm not sure exactly what "etc" intails but a simple thing may be to just get rid of some "HP robbing weight" like your crank pulley, cam gears, and flywheel. You could also upgrade to an aluminum driveshaft which you can get at www.suprastore.com - Toyota Supra Pics, Toyota Supra Parts, Toyota Supra's For Sale, Toyota Supra Pictures, Used Toyota Supra, Supra MKIV Sale, Toyota Supra Twin Turbo.

Also just getting rid of some weight off the car itself will drastically imporve your performance and handling.

Your 15+ year old drive train will rob you of somewhere around 20% of your power.

Headers would be good. Then you have to do the entire exhaust. AC delete is just awesome if the car is a runner and not a dd. IF it's a runner.., you may also want to delete the heater core.

A lightweight fidanza flywheel would help rev quicker. Unorthodox makes a light weight crank pulley. The stock crank pulley isn't too bad. But it is heavy.

Remove the back seat. All of the standard bolt on mods are good.., but. You have to do every single one.

A carbon fiber hood that weighs around 20lbs instead of the stock which is somewhere around 50lbs.

To gain all of that power. You're going to want to p&p the head.

Eibach lowering springs don't add hp, just performance.

There's no cheap way to get those gains in an N/A.

You're going to have to bore and stroke the block and use some seriously oversized forged pistons and rods.

Chambers: What's up dude long time no see.

Edit: I want an mrII. One of the 1st gens. To toy with.
Those things are hard to find in good shape though. And are quickley becoming obsolete.

I hear you can also drop the power steering rack for a non-power steering Mustang 5.0 rack, if thats the case then you can free up some weight and power.

Also don't forget some nice tires to help grip in those turns.


I just got back from a trip down to Florida, decided I needed a week off, lol. I was down in Naples, man I love Florida, no vehicle inspections, hot cars, and plenty of beautiful ladies. Thats reason enough for me to move down there. lol.

Anything new in your neck of the woods?

Do not get an electric supercharger it is a POS. My friend had one for his Malibu, it was pushing like a hair dryer on low it done nothing for power. I would go with a exhaust system I have seen some from I think it is called pacemaker they make headers, and exhaust for Mustangs and Cameros, but also for the 86-92 supra. I am waiting to get some money and get one of these myself. Get a K&N or even a AEM synthetic air filter, and some light weight pulleys, I like the fiberglass hoods because I will never have enough money for the carbon fiber hoods. These could make some decent power, well what I am going to use little bits at a time when I get some money.
I just don't want you to get an electric supercharger, because my friend got humiliated by all the automotive students at school.

If you go with a K&N. Use a dry flow filter as the oils in the standard bolt on could mess with the vafm.

Chambers: I think nothing new is going on. My car hates me and refuses to cooperate.