Superchargers.
02-24-09, 02:38 PM
#26
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Where did you read this 500 hp figure? I have searched online a lot and have only seen pics of the car. I don't read Japanese though so maybe it was written there somewhere?
03-04-09, 01:42 AM
#28
most people avoid it because it's actually more of a headache than a simple turbo but to each their own. with superchargers especially for roataries in what you are asking of a supercharger to do you ask it to do more work than it probably was built to do in the first place. i just hate dealing with shredding belts or gears getting chewed up on specialtly units that take weeks to get replacement parts for. for a T4 flanged turbo you can pretty much go buy whatever and swap it and bolt it right in and go, if you blow up your supercharger, well you're stuck for a while.
03-04-09, 09:51 PM
#30
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I think you would be best served by spending a few dollars on "Supercharged!" by Corky Bell before you take any action on your ideas. It is available from many online booksellers like Amazon, and is written at a very basic level which allows a noob to get an excellent introduction to supercharging.
http://www.bellengineering.net/produ...products_id=18
... or, you could spend several thousand dollars and several hundred hours of labor to find out what you could have simply read in the book.
03-05-09, 06:03 AM
#32
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Oh, well in that case it couldn't possibly offer any value because the laws of physics may have changed since then. You are right, the OP should try to reinvent the wheel because maybe round is not longer the "in" thing.
You young people scare me.
BTW, it was published 8 years ago.
You young people scare me.
BTW, it was published 8 years ago.
03-06-09, 05:38 AM
#33
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Evil Aviator... Turbocharging is a much better known path to reliable power. That doesn;t mean that supercharging is not a good path for someone wanting more power, but -- using positive displacement superchargers -- more linear, instant response. I would think that 13b owners that only wanted 400-450 whp would find this very attractive. I am trying it on a 20b aiming at 500 whp.
Gordon
Gordon
03-06-09, 11:42 PM
#34
Oh, well in that case it couldn't possibly offer any value because the laws of physics may have changed since then. You are right, the OP should try to reinvent the wheel because maybe round is not longer the "in" thing.
You young people scare me.
BTW, it was published 8 years ago.
You young people scare me.
BTW, it was published 8 years ago.
ummm ur getting off track sir...who said anything about defying the laws of physics...about 8 years ago battery driven cars were impractical, processors were four times as slow, and blah blah blah
Not researching the old is just as bad as not researching the new...
Sometimes people prefer different than practical as well.. for what ever reasons unknown. The turbine engine as practical the design maybe...its been redesign and reinvented many times...you being in aviation, i would expect different.
03-07-09, 08:02 AM
#35
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Researching the new: many years of college (hopefully), thousands of dollars, and hundreds of hours of experimenting.
I know which one I would try first.
If you expected different, then that means you are not in the industry or that you have not finished your training.
03-07-09, 11:12 PM
#36
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I ran a Camden Supercharger on a streetported 13B in my first gen. The car ran well and made decent power felt like a V8. It really came alive with the 150 Nos shot. I kept blowing out rearends and trannies.
So many corvettes so little time...
So many corvettes so little time...
06-07-10, 07:49 PM
#37
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Yes... looks like someone has done what I'm in the process of doing. Just you wait you supercharger nay sayers. The ROTREX is the new wave of centerfugal chargers. Low parasitic load, ridiculously low charge temps and a powerband like a big V8.
I just wish someone has a bracket already for the Rotrex on the FD.
bump.
06-07-10, 08:51 PM
#39
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I've been snooping on some compressor maps with the Rotrex.
http://www.rotrex.com/Home/Technolog...ical_Data.aspx
Seems like the C30-94 would be a realistic 400whp but with not a lot of room to grow.
Or you could go with the C38-61 and spin it lower (80,000rpm) and flow 49lb/min at a 2.0VE (15ish PSI) but have room to go to a smaller pulley and up the power if you wanted to go WI.
The bracket seems very simple to make looking at Monster Garage's pics.
The thing I love about the idea of this, is the low low charge temps, lower EGT's, the Rotrex with it's planitary gear drive will have very little load on the engine at low RPMs.
And the fact that no one does it!
I also own a turbo miata, and there are a few Rotrex kits for them now which is what got me thinking of doing this on the FD. Everyone who's driven one says it feels like a big V6 in a miata. I can imagine it feeling like a BIG V8 in an RX7 with a properly sized charger.
http://www.rotrex.com/Home/Technolog...ical_Data.aspx
Seems like the C30-94 would be a realistic 400whp but with not a lot of room to grow.
Or you could go with the C38-61 and spin it lower (80,000rpm) and flow 49lb/min at a 2.0VE (15ish PSI) but have room to go to a smaller pulley and up the power if you wanted to go WI.
The bracket seems very simple to make looking at Monster Garage's pics.
The thing I love about the idea of this, is the low low charge temps, lower EGT's, the Rotrex with it's planitary gear drive will have very little load on the engine at low RPMs.
And the fact that no one does it!
I also own a turbo miata, and there are a few Rotrex kits for them now which is what got me thinking of doing this on the FD. Everyone who's driven one says it feels like a big V6 in a miata. I can imagine it feeling like a BIG V8 in an RX7 with a properly sized charger.
06-07-10, 10:00 PM
#40
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Here's another thing I was thinking. Most people don't boost with a turbo past 15PSI or so on pump gas. One would think that this is because the intake charge temps are a lot hotter.
With a rotrex, if you were boosting a max of 15PSI, the only time you're seeing that 15PSI is at redline since boost comes on in a linear fasion.
So... that being said. Could you run say... 18-20PSI on PUMP gas with a Rotrex?
PS... Can someone who knows more about compressor maps take a look at the link I posted (in the PDF files) of the C30-94 and the C38-61 and throw your input in.
With a rotrex, if you were boosting a max of 15PSI, the only time you're seeing that 15PSI is at redline since boost comes on in a linear fasion.
So... that being said. Could you run say... 18-20PSI on PUMP gas with a Rotrex?
PS... Can someone who knows more about compressor maps take a look at the link I posted (in the PDF files) of the C30-94 and the C38-61 and throw your input in.
06-07-10, 10:05 PM
#41
Just saw this thread. I saw the Rotrex supercharger info in a magazine a few months ago and cut it out and have had it in my bag since. Seems like a great idea. They do make kits so you might want to call them up and discuss your needs. I say go for it 
06-07-10, 11:03 PM
#42
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No one I can find makes a mounting bracket with an idler for the FD. Except the pic there of the Monster Garage one.
I emailed them, but it looks like the website hasn't had action for over a year so I bet they're gone.
I also sent an email to Knightsports.
I emailed them, but it looks like the website hasn't had action for over a year so I bet they're gone.
I also sent an email to Knightsports.
06-08-10, 09:06 PM
#43
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Just as a note, http://wwwCamdenSuperchargers.com makes 9 and 12 inch versions (8-10psi) for the 20b and the cost of the kit is about $3400...
The pictures of the larger units are on a 20b.
Gordon
The pictures of the larger units are on a 20b.
Gordon
The only downside to that design is they are "coldside" superchargers, mounting on the manifold and you loose the chance to run an IC.
06-08-10, 09:39 PM
#44
I see the appeal. But to me, the amount of fabrication and R&D required to make it work would not be worth it.
A properly tuned single setup with water injection & proper heat mods can be just as reliable.
New ideas are always cool. This site sure has plenty of pioneers to take them on. This is definitely an interesting topic. Anyone willing to take this on, I give them total props.
For the average guy like me,.... without a machine shop, or tons of fabrication experience, this is impractical.... So I'll be going with my A-spec kit & RE V-mount...
Definitely following this thread though. Good stuff guys
A properly tuned single setup with water injection & proper heat mods can be just as reliable.
New ideas are always cool. This site sure has plenty of pioneers to take them on. This is definitely an interesting topic. Anyone willing to take this on, I give them total props.
For the average guy like me,.... without a machine shop, or tons of fabrication experience, this is impractical.... So I'll be going with my A-spec kit & RE V-mount...
Definitely following this thread though. Good stuff guys
06-08-10, 09:46 PM
#45
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Well I will be one of those "pioneers"... It's very simple actually. I can use the airpump mounting holes and the stock waterpump/alt pully setup and use the alt. as the tensioner.
Super Charged 3 Rotor
06-14-10, 12:52 PM
#48
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http://www.rxmotors.co.uk/epages/BT3...m_White_videos
Take a look at this. Tim will be running a supercharger on his drag car. Bolted on a 13b. He is one of the best builers in the uk. Check out some of the videos. Cant wait to see the old mazdatrix car hitting the strip.
Rix.
Take a look at this. Tim will be running a supercharger on his drag car. Bolted on a 13b. He is one of the best builers in the uk. Check out some of the videos. Cant wait to see the old mazdatrix car hitting the strip.
Rix.