i have searched extensively for information about what a good running supercharged n/a runs in the 1/4 mile. if you know or if you have one and know please let me know.

thanks

 

I think youll need to be a little more specific than that. How much boost would it be running, how much HP?? Auto, manual?? etc.....

 

Supercharged FCs are kinda rare. I havent ever spoken to anyone that has one.

Here is a link..
http://www.camdensuperchargers.com/

 

Ported and Polished Four Port 13B with Seven Inch Supercharger

Horsepower: 275 HP
Torque: 184 lb-ft.
Boost: 10 lbs.

Ported and Polished Six Port 13B with Seven Inch Supercharger

Horsepower: 276 HP
Torque: 178 lb-ft.
Boost: 9 lbs.

Enough ponies to get you into the low 13s at least. Probably even faster.

Jarrett

 

The only thing I really dont like about superchargers for Rx-7s is the fact that they run out of breath so fast. The Nelson/Paxton kit that used to be available was overspinning at 6krpm. If they could produce one that could handle 8k rpm, Id be very interested...

 

What for?

If you are making power lower in the Rev range, there shouldnt be any reason to rev to 8k.

What is it with you kids and 8000 RPMs?

Jarrett

 

thanks jarrett, i am looking into getting a n/a and supercharging it i just wanted to have an idea if the 1/4 times were decent. i still have a lot of research to do about it because i still dont know what port will go best with it or what sc i would want to buy, i do know i dont want to buy one that will only boost a low number, i want at least 10 pounds when im done

 

Sorry I cant provide the 1/4 mile times, but at 275 hps, that car should be a rocket....

For what its worth, if you are going to push 10 PSI, you are probably going to need a 4-port. They have lower compression. But thats just going on what I know. No factual basis whatsoever...

 

You could build a 6-port to handle the high hp and torque, but J-Rat is correct in the statement that a 4-port with lower compression will handle the high boost better for a longer period of time.

High boost w/ high compression will cause things to constantly blow apart over and over unless you have it built right the first time. 3mm 1 piece Apex seals, ported, etc. etc.

Look into an Atkins Rotary rebuild. They offer all sorts of high-performance turbo engines, which will take to a supercharger very well. At the very least, their website will give you some ideas on what you are going to want to use.

Good luck and I hope your wallet is deep

 

Well, its not that, Im not one of those people that wants to rev to 10K just because. On a v-8 or similar where power peaks at 6500rpm, a S/C is fine. But on a rotary or other high-revving engine, the power continues to build until 7-8k. Why would I want to limit my potential with a S/C that runs out of steam at 6k? I personally dont care that much about rpm, but I want to be able to use all the available power and rpms that I have available.

 

Believe it or not, the guy that owns Atkins, also owns Camden.

Jarrett

 

Worst thing I ever saw was a porsche speedster replica on a vw chassis...rotary engine in back with a supercharger...thing was slower than modified vws off the street. UGH. You would think that the lightweight kit car with that combo would do pretty good.

 

Well, the s-charger is radically changing the HP/Torque charicteristics (sp?) of the rotary.

If full power is being developed at 6 K, I will take it. I would much rather make full hps lower in the band, then have to rev the livin **** out of my Motor.

I cant comment on the performance of the Camden charger. I dont have any dyno charts. And the site doesnt specify where the max power was made. But since the guy that owns Atkins, also owns Camden, I would be willing to bet that the charger is designed to handle the higher revs of the rotary.

FWIW, I would rather go turbo...

 

I saw a custom job today at a local meet - 87 FC (NA model) w/ a bridge port and supercharger pushing out 20 PSI (absolutely crazy car). Fully adjustable suspension etc...looses traction in fourth when floored at regular highway speeds!! The car needs paint pretty badly but it's scary fast!!

 

See I dont understand that....With a BP, the brunt of the power is like 6k and above. With most superchargers ,they absolutely will not spin that high.... Did he have a completely custom S/C made? Maybe just a larger pulley...Do you know any more about that setup?

 

G'damn, thats nuts,. I want some pics of that?

Did you get a view under the hood?

 

A super charger can be modified to start producing boost whenever you want to...... It all has to do with gearing. Just put one HUGE pulley on the thing at it wont spin very fast until you hit 6k rpms if you dont want it to.

 

for get the super go turbo on the na u got the motor already so who cares turbos are so awesome i seen a na turbo and it looks and runs damn good fixed up right . http://www.aaroncake.net./RX-7/naturbo.htm
i would love to show u a pic but everytime even if its a little pic it wont let me post it on here