Anyone who is supercharged...
03-07-06, 11:14 AM
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Anyone who is supercharged...
Well im stuck in the middle of the ever-debatable question. Supercharger or turbo?i have an 85 gsl with a 4 port SP 13B holley carb and intake RB header exhaust and flywheel. How much HP am i lookin at with a 7 in camden? I have the begining to a turbo kit i have everything except a bigger turbo and intercooler, IC piping and a downpipe. so tell me about you SC and how much you like it. Thanks
03-07-06, 11:35 AM
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I have ridden in both supercharged and turbochared vehicles. However I will not go into this debate because it has been covered umptingbillion times. Do a search and you will find a more in-depth answer.
Supercharged was a fun ride however it never really produced the hp numbers. There was a local 79 with a supercharger and it put somewhere around 210 to the wheels. This was with a 7".
I went turbo...The reasons are apparent(at least for me). And since you already have parts why not just finish off the kit. Now do a search and make up your own mind.
Supercharged was a fun ride however it never really produced the hp numbers. There was a local 79 with a supercharger and it put somewhere around 210 to the wheels. This was with a 7".
I went turbo...The reasons are apparent(at least for me). And since you already have parts why not just finish off the kit. Now do a search and make up your own mind.
03-07-06, 11:49 AM
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Yea, I'm going with the blower, but you're going to get a ton of differing opinions here. Wait til sonicrat sees this...he's good at trying to make people feel bad about deciding to use a blower ;-)
Rich
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03-07-06, 01:22 PM
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Burning Oil-Grinding 3rd
Originally Posted by 64mgb
i think codeblue removed the blower and is trying to sell it...long story....
Rich
Rich
Last edited by Hades12; 03-07-06 at 01:25 PM.
03-07-06, 01:42 PM
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Originally Posted by Hades12
Yea but he/she had the car for like 3 years, so I think they are the best to give inpression on it.
Rich
03-07-06, 06:38 PM
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I make people feel bad about picking the wrong blower.
Stereoptypical? I started the trend!
At least I've got experience with them, and I've also invested the money into finding out just how 'badly' they do perform. Their AE is a joke at best. You're better off sticking a Eaton M90 on it.
If you want a blower, centrifugal or twin-screw. Don't waste your time with a roots (especially one as poorly designed as the above mentioned).
That is all.
Stereoptypical? I started the trend!
At least I've got experience with them, and I've also invested the money into finding out just how 'badly' they do perform. Their AE is a joke at best. You're better off sticking a Eaton M90 on it.
If you want a blower, centrifugal or twin-screw. Don't waste your time with a roots (especially one as poorly designed as the above mentioned).
That is all.
03-07-06, 07:31 PM
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Ah, the world is right again! Now that that's out of the way, if want to put a Camden on your rotary, do it. It's fun, educational, and somewhat easy (and expensive). If you're looking for *****-to-the-wall power, it's probably not the way to go. If you're looking to bolt on some extra horsepower without needing to fab a bunch of stuff, it's a good way to go.
Just my $0.02.
Rich
Just my $0.02.
Rich
Last edited by 64mgb; 03-07-06 at 07:33 PM.
03-07-06, 08:30 PM
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That depends on a lot of things...
A camden supercharger will have intake air temps FAR higher than most any turbo application (which makes detonation a likely event). (if you run a turbo @ the same PSI), however a turbo will keep more heat under the hood.
A camden supercharger will have intake air temps FAR higher than most any turbo application (which makes detonation a likely event). (if you run a turbo @ the same PSI), however a turbo will keep more heat under the hood.
03-07-06, 10:10 PM
#18
Rotary Freak
Like SonicaRat said, if you're going to supercharge the car, give it a good supercharger. That involves fabrication, and time, but what doesn't? If you run a Camden, you don't have much chance to increase your power beyond what you get out of the box. I had reliability issues with mine, but that's because they screwed up my order and gave me the wrong PSI pulley. Three times.
03-07-06, 10:39 PM
#19
Originally Posted by SonicRaT
Unless they leave the roots behind, it's still not going to be very ideal.
03-07-06, 11:07 PM
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There are 4 basic common types; roots, twin-screw, centrifugal, and axial.
Centrifugal:
It's difficult to find a compressor that fits well with a rotary (although you can get around this by dumping excess unused air to keep the compressor more in it's efficiency range). It has the downside in that boost builds progressively and gives the feeling of lag (worse than a turbo), although this 'lag' is predictable.
Roots:
Terrible efficiency, especially at high pressures. Various designs for the lobes will effect it's efficiency (anywhere from 40-60%), benefits from being positive displacement and having the 'instant' boost, although it's such a large hairdryer you can't get much of any usable power from it.
Twin-screw:
Positive displacement with the ability to have good efficiency!
Axial:
Talk to the guy on the RX8 Club, I have no experience with them.
What more do you want, every dyno sheet I've ever made with every type I've ever used on a rotary?
Centrifugal:
It's difficult to find a compressor that fits well with a rotary (although you can get around this by dumping excess unused air to keep the compressor more in it's efficiency range). It has the downside in that boost builds progressively and gives the feeling of lag (worse than a turbo), although this 'lag' is predictable.
Roots:
Terrible efficiency, especially at high pressures. Various designs for the lobes will effect it's efficiency (anywhere from 40-60%), benefits from being positive displacement and having the 'instant' boost, although it's such a large hairdryer you can't get much of any usable power from it.
Twin-screw:
Positive displacement with the ability to have good efficiency!
Axial:
Talk to the guy on the RX8 Club, I have no experience with them.
What more do you want, every dyno sheet I've ever made with every type I've ever used on a rotary?
Last edited by SonicRaT; 03-07-06 at 11:10 PM.
03-07-06, 11:09 PM
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Originally Posted by snub disphenoid
Like SonicaRat said, if you're going to supercharge the car, give it a good supercharger. That involves fabrication, and time, but what doesn't? If you run a Camden, you don't have much chance to increase your power beyond what you get out of the box. I had reliability issues with mine, but that's because they screwed up my order and gave me the wrong PSI pulley. Three times.
03-07-06, 11:17 PM
#22
Rotary Freak
Originally Posted by SonicRaT
There's quite a few people who've killed those chargers with the 'higher' boost pulleys they were provided, as you did.
03-07-06, 11:51 PM
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None.
There are too many other variables.
If you're going over which one is better for an engine and it's internals, the one that has the least ammount of heat rise for the same ammount of air you throw in it. This would be a twin-screw/centrifugal/axial/turbo, they all tend to have efficiencies within the same region. You can avoid under the hood temps with a turbo simply by properly using heat shields/blankets/etc. So it depends.
There are too many other variables.
If you're going over which one is better for an engine and it's internals, the one that has the least ammount of heat rise for the same ammount of air you throw in it. This would be a twin-screw/centrifugal/axial/turbo, they all tend to have efficiencies within the same region. You can avoid under the hood temps with a turbo simply by properly using heat shields/blankets/etc. So it depends.