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It's a shame that the miata trannies fall apart around 200hp. Most guys who do that kinda stuff swap over the 2nd RX-7 TT tranny.

A guy who autoxs at rpi has a supercharged miata... you can hear the tranny moaning off the line :)
 

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Jeffescortlx said:
Is just over 200whp worth 5 grand?

There really is no such thing as "instant boost" with a supercharger, it still need's RPM's to make boost.
Well sorry, if your car is not running then you wont be boosting.
 

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ck_james1983 said:
Jeffescortlx said:
Is just over 200whp worth 5 grand?

There really is no such thing as "instant boost" with a supercharger, it still need's RPM's to make boost.
Well sorry, if your car is not running then you wont be boosting.
My point is a SC does'nt hit full boost untill the RPM's are high. A turbo can reach full boost sooner (lower RPM's) then a SC.
 

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Jeffescortlx said:
ck_james1983 said:
Jeffescortlx said:
Is just over 200whp worth 5 grand?

There really is no such thing as "instant boost" with a supercharger, it still need's RPM's to make boost.
Well sorry, if your car is not running then you wont be boosting.
My point is a SC does'nt hit full boost untill the RPM's are high. A turbo can reach full boost sooner (lower RPM's) then a SC.
Wrong.
 

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ck_james1983 said:
Jeffescortlx said:
ck_james1983 said:
Jeffescortlx said:
Is just over 200whp worth 5 grand?

There really is no such thing as "instant boost" with a supercharger, it still need's RPM's to make boost.
Well sorry, if your car is not running then you wont be boosting.
My point is a SC does'nt hit full boost untill the RPM's are high. A turbo can reach full boost sooner (lower RPM's) then a SC.
Wrong.
Go ahead and Inform me.

I'm looking right at the dyno chart, it has to rev to 7000 RPM's for it to reach it's highest hp, and when it is, it's very peaky.
And it only made 189ftlbs with 13psi. I bet if that same motor was turbo'd with 13psi it would make a lot more tq and have a broad power band instead of only a peak at 7000 RPM's.
 

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I never said anything about "full" boost. With a turbo because it is relying on the exhaust to provide that boost there is "lag". With a supercharger because there is no relying on that it can compress and force more air into the engine. Especially with a roots or screw type supercharger. Most superchargers can make pretty much instant boost providing it at as low as 900RPM. I dont know where your car idles but mine is VERRRRY close to 900RPM. I personally would go with turbo, not only for the cost issues with superchargers but also the fact that turbos are more efficient.
 

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Plain and simple as siragan has said it depends...but drive a turbocharged car running 6lbs then drive a supercharged car running 6lbs. I would take the supercharged car anyday if they were giving them away.
 

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Example of an amazing supercharger setup. My buddy is running an 03 Stang SVT Cobra with a Kenne Bell SC on it running about 18 pounds and he is pushing 600HP+. What are you running for boost Jeff? It just depends on the application what my point is, is that a supercharger in general just because of the sheer design differences will produce boost sooner.
 

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Siragan was spot on. It all just depends on the setup and the motor it's on. In this case though, a turbo could provide a bit more power at a given RPM then that super could in the mid to upper range. In the low range, the super is going to get the nod because it works off the crank and doesn't have to spool up.
 

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Jeffescortlx said:
Is just over 200whp worth 5 grand?

There really is no such thing as "instant boost" with a supercharger, it still need's RPM's to make boost.
well, it is boosting constantly as the engine is running. cuz, well, it's not like those golf carts that turn on the gas engine only when you step on the pedal. you may be getting only like 3psi of boost at idle speed (700rpms) but that's still alot better than waiting as you get on it for your turbo to spool up, because it may start @3psi @idle speed and work up from there (chances are it probably only gives you like 1psi, but still) it would already be boosting more and more as you accelerate from a dead stop. now, correct me if i'm wrong, but this is pretty much a huge bonus for those of you with autos, because you don't have the ability to rev your engine to spool up with a turbo without risking severe damage to your transmission. but still.... the whine of a supercharger, IMO, is alot cooler than the whirring of a turbo and the whoosh of a blowoff valve. DEFINITELY makes you sound like less of a RICER (j/k jeff :lol: )
 

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siragan said:
Alright, just look at the compressor maps:

http://www.rbracing-rsr.com/turbotech.html

You'll find that you're both wrong, but Jeff is more right. The real answer to the question is that it depends.
I would have to agree. It really depends on the application. Look:
http://www.dynoperformance.com/search_details.php?ID=653

wonder if a turbo would create those kinda numbers at a mere 3600rpms........ (refer to link, and you'll understand)
i'm sure a small turbo that boosted at LOW RPMS COULD
however, a large turbo that didn't kick in until higher rpms would really stretch out that powerband......
DON'T GENERALIZE
 

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Discussion Starter · #20 ·
Like I said, its overpriced. i put an Eaton 62, bypass valve, FMU and all the pipes in the GT for around $500 for the whole setup and made 6Psi. The ubercharger is simply a better design IMO than previous models and should fit right on a GT.
 
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