I just bought a secondhand one and I was wondering if anyone has any personal experience with them. I talked to the people at Camden and they just dont have any hard facts when it comes to the 12A blower. They claim it will produce up to 15 pounds of boost when intercooled. Also what would a safe pressure be regarding setting boost a 12A. Sorry, I searched abit but didnt find any direct answers to my questions. I am going to send the unit out and have it rebuilt probably, and order the intake to use my mikuni with it.

Also I would like to know how loud the belt whine is, I will ask Camden if it uses straight cut or helical cut gears that will give me a good indication... but if someone here knows by all means let me know. Also does anyone know where to get a good rebuild kit for the LSD?

Oh and most importantly if there is anyone out there who does have this and has a dyno sheet, please scan it and load it up here!

Thanks,
Chris

 

I bet if you actually spent sometime reading some of the 5 pages of threads that come up when you just enter the word camden you would probably find most of your answers. :-)

https://www.rx7club.com/1st-generation-specific-1979-1985-18/sneak-pic-my-85-supercharged-12a-project-511024/
https://www.rx7club.com/1st-generation-specific-1979-1985-18/super-charged-12a-anyone-pictures-504861/
Those are a couple. Use the advanced search function and look for the key words 12a, camden, and the ones with the most respones.

 

It has straight cut gears. 6 or 7 psi would be my best guess since it's not intercooled. Adding an intercooler would be a chore but water injection might be an option.

 

Water injection is definately an option, but even with water injection and more boost, I wouldn't hold my breath for awesome HP figures.

I'd guesstimate that a stock port 12A with exhaust and 7-8 PSi on a Camden would be lucky to make 150whp.

 

if you decide against using this setup pm me i would be very interested in buying it off of you

 

Blowers, despite their low HP improvement, do have their charms. The low boost PSI can actually be an asset since it limits highend HP and reduces stress on the engine. Positive displacement blowers usually add a nice kick to the lowend torque which provides immediate gratification. IC engines intrinsically have poor lowend torque (try an electric car or a steam car sometime!) and blowers improve that, while turbos make it worse.

 

Been ther, have one myself. Hopfully your engine is strong enough for it. Weber is a waste, get a 500 cfm edelbrock thunder series carb, works the best on the camden. Go with premix, helps lube the teflon seals in the camden, What to expect, on a stock 12a you'll get a great improvement in lower end torque, and run the #7 pulley only! You will see "up to" 9 lbs of boost, I've done smaller pulleys and pulled more boost, however the boost drops off quickly and heats up the charger way too much. I consider water injection mandatory since there is no way to run an innercooler. High flow exhaust is necessary. You will see about 150 rwhp with stockports and a potential of 175rwhp with porting and in both cases get loads of low end torque. The car will definitely "feel" way faster than it actually is, this does make for a fantastic daily driver experience. Do't shoot for anything over 9lbs of boost, you acutally lose power due to heat. Nitrous works great with a roots blower, so consider a mild 50 shot and you'll be over the 200 rwhp mark which will be a 100% improvement over stock. Cross your fingers on keeping the engine together though...... http://media.putfile.com/3rd-run-25

 

I'd have to agree with 84stock. We don't hear much from the codeblues anymore. They went from a 5" with 4 bbl to a 7" with 2 bbl TBI (looks like a weber) and there were more rants than raves. They could never get the tuning right or whatever it was. Then they went to a turbo and that's all I know.

Next is Kim. She has one of those 2 bbl adaptors sitting atop her Camden as well. I don't know what kinds of problems she's been having, if any.

Lastly we have at least three Edelbrocks that are running quite well; 84stock, my bro's RX-4 and my friend's orange 1st gen. I think 84stock has a 7" but the other two are 5" with untuned carbs and they still work fine. The orange car has a -10 pulley that is the same diameter as the snout on the SC. I don't know how much boost that is, but it sure is a kick in the pants. It'll break 'em loose in gear on dry road. It's a very nice, dead simple setup. I'd recommend it to anyone over the alternative.

As for the sound, it sounds like a gilmer pulley kit even though it uses a standard 5 or 6pk serpentine belt easily found at Shuck's etc.

 

I'm sure you could install a progressive methanol kit and run ALOT more boost. What ever the smallest pulley (-10?) you can buy and won't have over heating or detonation problems. Just keep your Meth tank full!

http://www.alcohol-injection.com/

 

Been there too, nope! Even with the meth injection the #10 pulley gave great boost but still wayyyy too much heat and you end up with cavitation and loss of boost in the top end where everything starts to come together and belt slippage issues as well. Really, if you want more boost from the camden do what I wish I had done, get the 9"..........

 

Wouldn't you also need a cogged pulley set at that point? My friend's other SC is a 7" with a holley. It slips above 4 grand under load. He thought is might have been the waterpump pulley that was slipping so he removed it. No change. It's probably the main drive pulley that's slipping, or both. The black anodized coating has worn off the waterpump pulley and the main drive pulley. It looks normal on the alt and SC pullies.

 

atkins rotary owns camden now. call atkins.

 

If you use the #10 (tiny) pully you end up with belt slippage issues. The "best" belt by far to use is the "goodyear Gatorback" belt. I do wish though that atkins made a cogged set of pulleys.