2.3L supercharged?

[lamrith]

I was thinking about this myself, and then saw it mentioned and thought I would start a dedicated thread on it.. Now before everyone gets upset and says why bother when the factory made a turbo. That is sort of the point, everyone runs a turbo. Turbo's have thier traits and blowers have thiers, so I just want to see if anyone has done it before and what the results were...

I am really wondering on what size blower to use?? would a 5.0L blower be good?? they typically run more air but lower boost, can you raise the boost level on a blower?? IE: Can a 9psi 5.0L blower put out say 15psi+ feeding a 2.3L??

 

[RustBucket]

The inherent problem with superchargers is that it takes power to make power. The higher the boost, the more hp is needed to spin the blower. While a turbocharger may create a slight hp loss due to exhaust restriction, it's alot less parasitic than a supercharger, and in an application that can't afford to give up much power, the supercharger just doesn't seem efficient enough to make it worthwhile. Compare costs between the two systems and the turbo looks even better.

With the turbo, most if not all of the homework is done either by the factory or by enthusiasts. There isn't a bolt-on supercharger system available, nor is there one easily adaptable. Anyone wishing to run a supercharger is going to have to fab all of the plumbing, bracketry and drive pulley(s). That's not to say that it can't be done. It's just not feasible from a performance-per-dollar perspective. It'd sure be cool from the lookey-what-I-did perstpective though.

Stuff like that falls under the "D I Why?" category.

 

[Red_LX]

Far as I know, the boost level on a supercharger can only be raised by changing to a smaller pulley. I think 9 psi is 9 psi no matter what size engine the blower is attached to.

Anyway, like rustbucket said, adapting a blower would require a lot of fabricating and in the long run would probably not really be worth it. The only supercharger that might even be worth messing with would be a roots style since it would give you some additional bottom-end grunt...if you were gonna go to the trouble of putting on a centrifugal supercharger, hell you might as well just put on a turbo.

 

[lamrith]

Yeah those are sort of the thoughts I had as well, I was just really curious if it has been done. I would think for a street/road course car a supercharger would be preffered due to consistent boost relative to throttle and not base don load etc...

The old addage boost, corner, wet comes to mind form some locals that have boosted when they were not expecting it with bad consiquences...

As for the set boost amount, I think that will be relative to volume as well, since the blower with say a 6" pulley will put out X cfm and putting a 5" will increase CFM and also boost??? Purely theoreticall, I was using that to think that putting a blower form a 5.0 onto a 2.3 would net inreased boost over what a 5.0 would see, given same RPM and pully...

THAT SAID a turbo is a TON simpler.

 

[bhuff30]

It depends on what kind of blower you are talking about. With a cetrifugual, you would risk going into surge using a 5.0 blower on a 2.3. With a roots, you automatically get twice the boost on your 2.3 as what the 5.0 had. Be prepared to lose 50hp driving the blower.

 

[lamrith]

what do you mean by surge?? it would boost to a point and then "blow off" in some way lossing allot of boost then build again to repeat??? yeah that would NTO be good..

Yeah the parasitic loss is extreme on blowers..

 

[Mr. Merk]

i actually bought my mustang with every intention of supercharging it, did more research, i was going to lose power and spend a lot of money doing it, if you were to do one, i'd reccomend doing it to an NA 2.3, running an FMU and water/methanol injection

i've talked repeatedly with a guy who is running a blower on a 2.3 merkur and he said there was a lot of tuning because the turbo ECU doesnt like the blower at all, it was rich in some spots and lean in others and it varied across the rpm range, and he said the most you'd want to run is 12psi and thats out of a LARGE blower, blower heat>turbo heat

 

[lamrith]

yeah I plan to run a separate EFI system, not a factory one. At this point I am not planning ot use a blower, but I wanted to see if anyone else had and what the issues had been..

I full plan on going turbo, specially since I am getting a holset for free.. Next big hurdle is figuroing out what IC to run... I will porbably buy a Xo2 unit and save the hassle of fabbing something up myself.

 

[Stinger]

everyone runs a turbo.

Turbo's have thier traits and blowers have thiers

There is a reason everyone runs them BESIDES because they came that way. It's because they are better, period.

Turbo's do have their traits...more power, more efficient air charge, still get good gas mileage when not boosting (try that with a supercharger), etc...it's just not worth it.

 

[no5pointslow]

I am going to try using a Eaton M90(?) I got out of a supercoupe.

It can't be to diffacult to get hooked up, just need to fab a bracket and a manifold to comes off the post of the SC back that turns into a tube to go into the throttle body.

 

[Red_LX]

I hope you're trying that on a mass air car, because if it's speed density the car will run like crap.

Also...let us know how it goes.

 

[no5pointslow]

VAM car

 

[no5pointslow]

I found a probe with it done

 

[ccphil55]

Here's a crazy idea if you have the money, and if it is feasible, but what would happen if you ran a turbo into the supercharger?

 

[no5pointslow]

waist of boost

 

[bhuff30]

Here's a crazy idea if you have the money, and if it is feasible, but what would happen if you ran a turbo into the supercharger?

You would get some enormous pressure ratios. If the blower was a roots pushing just 6psi then you are going to multiply the pressure ratio of the turbo by 1.4. For example, 16psi from the turbo and your roots pushing 6 is going to result in 28 psi. This is because you are compressing already compresssed air by 1.4 times with the blower.

 

[RustBucket]

Anybody here old enough to remember when Pro Street was in it's glory and Mark Grimes built that tube chassis, Chevy Celebrity Eurosport with a twice-turboed, twice-blown small block? The plumbing was impressive, the performance was not.

EDIT: Oops! That one was triple blown. It must have been Rick Dobbertin's Pontiac J2000 that had teh two hairdryers and two huffers.