http://www.camdensuperchargers.com/

The dark side is calling again!

 

anyway we could be able to get more power out of it? like say 300-350 to the wheels?? i know, lots of fuel, stand alone or maybe an A/F cont. but, what else?

-edit: what i'm basically saying is.. i have no clue as to how you could make more power out of a SC compared to a turbo...

like, would true duals be great for for a SC...? could someone educate the SCer noobs

 

Is this the same kit Atkins rotary is selling? I saw Atkins's prototype mainfold that is almost exactly the same setup:

Update: yeah it's atkins, just a new webpage.

And to answer your question, Atkins has had a pro-injection version for a while, this is just a new twist with the intake manifold keeping your stock throttle body.

And there now offering a 5, 7, 9, and 12" supercharger that works with this manifold according to the website

 

No, I don't think so since this one can be used with FI while the Atkin's kit needs carburation.

 

Camden = Atkins

 

For quite some time now, Atkins has been working on a setup for EFI cars. At least since last year that I recall. This is Atkins. And IMHO it is not worth spending almost $4K for a gain of around 30 hp. To get more, you need the bigger injectors?? Why is it that I remember hearing on this forum that the stock fuel system can handle more power than that?

 

bump...

 

3800...+ 200 for injectors + 100 for a fuel pump = 4100 for 260 at the rear wheels. Doesn't seem so bad compared to what it takes to get a T2 and put 260 to the wheels.

Before I would buy one, I would need to hear about the results from other buyers.

 

I still think those superchargers would work better with a 4 barrel TB that would bolt up to teh SC. I don't understand why Camden/Atkins (Dave Atkins owns Camden for those who don't know), doesn't offer the SC with a Holley style throttle body with a Microtech EMS. That is if they are still a MT dealer.

 

that's pretty sick! I wouldn't mind having that setup!

 

They used to have this setup on their website, but I think it was too expensive for most people. If they still offer the regular carbureted supercharger, you can simply bolt on a Holley Pro-Jection kit yourself.

Yes, an upgraded exhaust system would help. However, it is going to be difficult to get a lot of power out of this kit because this particular type of supercharger is horribly inefficient, and does not lend itself well to intercooling. I think you would be better off going the turbo route for that much power. The big advantage of this kit is that it is a true bolt-on, which will increase the power without any expensive or difficult internal engine modifications, standalone EMS, exhaust system, throttle body, etc.

Yes, the cheapest route to boost for the NA RX-7 is still to simply sell it and buy a TII for about $500-1,000 more. However, as I stated above, this is a nice kit for those who like to do things themselves but don't want a project that will take all year.

This Atkins kit is estimated at 176hp at the wheels, which is about 207hp at the flywheel. This would be a 47-61hp increase over stock. Their 260hp rating at the wheels would be about 305hp at the flywheel, which is 145-159hp over stock.

The horsepower difference for fuel injectors is based on Brake Specific Fuel Consumption (BSFC), which means the fuel flow in pounds per hour divided by the horsepower. In other words, it indicates the efficiency of the engine in terms of fuel flow per horsepower. While an NA engine may have a pretty good BSFC, adding forced induction ALWAYS increases the heat, which requires more fuel for cooling purposes, which worsens the BSFC. The more heat, the worse the BSFC. Intercoolers and water injection will obviously help the BSFC. Notice that this Atkins kit has no intercooler, and it uses one of the most inefficient (ie hot) type of superchargers on the planet. Given that...

The stock NA fuel injectors are rated at 458cc/min @ 39.8psi fuel rail pressure. This would be good for 252bhp (flywheel) at .55 BSFC and 80% duty cycle. However, this would only be good for 231bhp (flywheel) at .60 BSFC. Now, if we reverse-engineer the Atkins 207hp (flywheel) rating for the stock fuel system, we come out with .67 BSFC. Reverse-engineering their 305hp (flywheel) estimate, assuming the same .67 BSFC (which may or may not be accurate), we get a fuel injector requirement of 675cc/min for all 4 injectors, which means that 680cc/min injectors would work well. Additionally, the fuel pump would need to be able to pump the required volume of fuel at the required pressure. Now, their numbers, as well as my reverse-engineering, may not be 100% accurate, but hopefully that answers your question about why the maximum hp rating for fuel injectors changes with changes in the engine sysetm.

 

I was curious about how superchargers are cooled. With turbo you have intercoolers, but I dont think ive ever seen a s/c with one. How does it work to get cooled properly? If you turn up the boost is a custom intercooler required you think? And what about a BOV, i also dont think ive seen any s/c cars with a BOV... i wonder how much boost the s/c can run on an n/a motor safely

 

i have supercharger on my 79 done by Camden/Atkins .
http://members.cardomain.com/codeblue2

 

Sometimes they aren't, lol. An intercooler is an accessory, not a requirement. Methods of cooling the air charge besides an intercooler include ADI (Anti-Detonant Injection, aka water injection or alcohol injection, etc.), using cooler fuel like alcohol or nitro-methane, or simply adding more fuel as a coolant rather than for power. Also, using a fuel with a higher octane rating (anti-knock rating) will lessen the chances of detonation with the increased heat.

http://www.superchargersonline.com/intercoolers.asp

http://www.superchargersonline.com/content.asp?ID=14

 

what would be the most cost effective intercooler for that EFI kit if you did want to have more boost to contain wear on the engine?

what would be the best in overall?

 

The Roots-type superchargers like this Camden kit compress the air in the engine intake, not in the supercharger itself, hence the reference as a "blower" rather than a "compressor". This is why it is difficult to add an intercooler. Unless somebody has a better idea, you would need to make a custom intake manifold with an integral intercooler. Given the space limitations, an air-liquid intercooler is probably the best idea. Unless Atkins/Camden offers a kit, this is going to be difficult and expensive, not to mention heavy. Personally, if I were to install this kit on my car, I would leave it as-is. If I wanted more power, I would use a turbocharger instead.

LOL, if there were one best overall intercooler, everybody would use it.

Nice car, BTW.

 

NICE Panasports (and car, of course).

 

I was wondering, knowing fairly little about superchargers. How much boost could you run on an N/A if you would be running a compressor and intercooler?

Wouldn't it be possible to put a compressor where the airpump is now (plenty of space if airpump is removed?), route the air to an intercooler and then back to the stock TB?

Or is that a real stupid setup?

 

thats kinda the setup im thinking of... although probably supercharger on the other side, where the ac and ps are normaly, i just figure that would clean up the piping and make everything shorter when using a frontmount