i just aquired a 13b n/a motor and chassis from Crackheadmel.. i had a few questions about s/c a 13b n/a. like is there any one out there running the camden s/c kit? or what is the pro's and con's of supercharging a rx-7, i know a turbo is relavtivly free horsepower, and a supercharger does create parasitic drag on the engine, but i was planning on removin the air pump, a/c and power steering and going with a electric water pump hence freeing up much more drag then i would be creating with a s/c..any thoughts???

--joe

 

The unit isn't very efficient at all, and all of the past dynos have proven that. I would seriously suggest you just turbo the thing instead, and save yourself the wasted money. And using an electric waterpump will cause more of a drag than the mechanical, because you transfer the load to your alternator.

 

I think the Camden s/c kit would be worth it if the price wasn't so outrageous. (Hint to the guys associated with Camden) The price is just ridiculous

 

It'd be better if it the charger was even somewhat efficient. Between all of the problems with it, and the rather poor results on the dyno, I don't know even if it was priced better if it'd be worth it. Just search for all of the old dynos from it, CODEBLUE was the only one with a decent ammount of power, and that was with more money dumped into it than most 400+hp turbo cars.

 

The camden kit is very poor in design. My friend bought the kit and supercharged his '87. It never idled right and the belt slipped. Made 10PSI though but then the motor popped

 

It's funny how their 6lb pulleys put out over 10psi, and still only dyno at roughly 180rwhp.

 

... which is why you see more Roots blowers in museums and less on the street.

The pricing of that kit is consistent with the pricing of other Roots blower kits. You guys just need to get it into your head that new parts are simply going to cost more than junkyard parts and cheapie Chinese Ebay parts.

 

They'll never learn.

 

i wanted a supercharger SO bad when i first came across it, after thinking long and hard about it, that **** isn't worth it no matter how oyu slice it, the blower just isn't efficient period, especially with the higher idles you have to dial in (around 1500-1800) no aftercooler, i could go on, there have been much better setups with whipple chargers. For real power on an N/A engine just get a really good turbo setup, the results from doing that speak for themselves!

 

Turbo the car. I have no idea why I didn't think to do it (well, there wasn't an NA turbo kit out at the time, now there is), seeing as how abundant exhaust gas energy is in NA RX-7s. You'll have a fast-spooling devil of a car, with 2x as much horsepower as a stock NA, even if you use a stock TII turbo.

The Camden kit has many shortfalls. If you plan to make more than 180rwhp with just the bolt-on kit, you're going to need a lot more money than you think you do. You NEED an electric fan/water pump to take stress off the belt to keep it from slipping. You NEED standalone EMS to tune your car and for GODS SAKES DO THE TB MOD OR AT LEAST REMOVE THE THERMOWAX!!! I'm in my 7th month of installing and tuning this supercharger kit and I KNOW I'm not going to break 250rwhp. With perfect hindsight, I should have done a junkyard turbo conversion or an LS1 conversion, both would have been cheaper, would have yielded more power, and would have been MUCH simpler.

The Camden kit's lower intake manifold is designed in such a way that the supercharger blows air directly into a metal wall, then the air has to get jumbled around until it finds the intake ports. This causes a whopping amount of air turbulence, which heats the air molecules and acts to seemingly reduce the efficiency of the supercharger. The Camden supercharger is a twin-lobe roots-type supercharger that is not even as efficient as an eaton supercharger, but this poorly designed intake tract makes matters even worse. On top of all of that, the kit was incompatible with my S4 Coupe's A/C lines, and also the instructions I got were not rotary newbie friendly, so I ended up leaving my 5th and 6th intake port sleeves in on my first installation attempt (I KNOW, I AM STUPID, I REALIZED THAT WHEN I LOOKED BACK AT MY RECIEPTS FOR THIS PROJECT). Also, when I called Atkins to ask for technical support, the people who helped me seemed bothered that I was calling. Little things like that make me really not want to be a driving billboard for Camden.

Do yourself a favor and utilize what you have plenty of - exhaust gases. Turbo the car and forget that you even considered a supercharger kit. If you supercharge your car, I guarantee you will be either broke or disappointed.

 

Sorry to hijack, but I think this thread should be over now.

What do you (SonicRaT, Evil Aviator, Aaroncake, anyone with experience) think a professionally tuned turbo-6-port could make in terms of horsepower with a larger turbocharger. I'm wondering about something like a Turbonetics 62-1 Q-trim at about 10psi on pump gas. Just wondering.

 

That's quite a bit of an expense, but honestly it all depends on how the tuning is and the porting of the engine, as well as what turbine you're using. PM me if you want some more info.

 

And the reign of n/a>turbos shall rise!!! wo0o0o0o