[Turbo RANGER]

OK, never heard of this being done before, but I'm thinking about putting 2 Eaton M90 superchargers on a 2.3 turbo motor with the turbo system removed. This should make a minimum of 30 psi with no lag. Just lookin for advice about what to do to make the engine hold up to that. It would be mostly the same mods as for a turbo setup, right?

[TurboLX]

pointless.

[Turbo RANGER]

Why?

[Racinjason81]

first of all Why? superchargers take power to make power and a 2.3 doesnt make much .
second why would you install 2 m90s one is more than enough to get the job done.just cuz you install 2 blowers doesnt double the boost.boost is backpressure and the more you pressurize air the hotter it gets you would have to add an efficient intercooler.Why are you worried about lag any way with the proper sized turbo lag would be very minimal.
you dont need alot of boost to make hp you gotta make your engine move air more efficiently like a ported head ,cam and ported intake manifold,and larger exhaust.you probably wouldnt be happy with a supercharged 2.3 anyway

[Turbo RANGER]

No, if you run one blower into the next, it almost doubles the pressure. It's called compound pressurizeing. The germans used it on Grand Prix cars before WWII and made over 45 psi with a small engine. In twin compound Turbo setups, you can make over 200psi(big diesels). Anyway, I'm going to port it and add a big front mount air-air intercooler, and besides, boost heats wether it's turbo or sc. I do agree about one sc though. If you turn it at 2.6 to 1 It should make 1.5 Bar or 22psi. And all turbos have lag, no matter what size, they all are also very peaky, whereas a roots type sc has a very broad torque curve. I'm running a stock 88 tc engine right now and it has lag which sucks for street use.

[TurboLX]

Originally Posted by Turbo RANGER No, if you run one blower into the next, it almost doubles the pressure. It's called compound pressurizeing. The germans used it on Grand Prix cars before WWII and made over 45 psi with a small engine. In twin compound Turbo setups, you can make over 200psi(big diesels). Anyway, I'm going to port it and add a big front mount air-air intercooler, and besides, boost heats wether it's turbo or sc. I do agree about one sc though. If you turn it at 2.6 to 1 It should make 1.5 Bar or 22psi. And all turbos have lag, no matter what size, they all are also very peaky, whereas a roots type sc has a very broad torque curve. I'm running a stock 88 tc engine right now and it has lag which sucks for street use.

Dude your wasting your time.

It's the most pointless thing's you can do on a 2.3, especially when it doesnt make alot of power without a power adder so it's gonna strain itself trying to spin that supercharger especially 2 of them, get your mind out of the box and do it right, save yourself the trouble and go with the turbo.

[Matt Cramer]

If you're doing a multi-stage supercharger setup with equal sized blowers, the first stage would have to be spun much faster than the second. I suspect you'd put it out of its efficiency range.

[Turbo RANGER]

True, the first sc would have to be quite a bit larger to work. but i have decided to run a single sc at 2.6 or 3 to 1. this should provide 22-30 psi WITH NO LAG!!!!.Also should have gobs of low end torque while only having turn the motor 6500 or 7000 rpm.

[MSO]

if it has low end torque why even rev it to 6500 rpms?

i think 5500 would suffice for street driving

[Turbo RANGER]

The car I got the motor out of didn't have an instrument cluster, so what is the stock red line? Also, how hard can you turn one with ARP rod bolts? Oh, and the reason for wanting to turn it that hard, is because I only have 3.73s and I want to be able to run at least 145MPH and right now I figured it up and that would mean turning the engine at least 6500 for extended periods.