my n/a supercharging project complete
#201
Wait................What?
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Also, this is going to help the low-end torque ALOT.
The fact of not having to modify the exaust at all.
No messing with routing coolant lines.
No messing with oil lines.
This is MUCH easier.
The hardest part of this install, would be installing an S-AFC, and the mounting bracket.
Since zbrown has done the hard part of making the bracket and getting everything sized/lined up... if you could just re-create his bracket, sell them *******... you'd GURANTEE to sell some.
Hell, this could be a big canidate for a complete supercharging kit. Pre-made piping and everything.
Anybody up for the challenge??
If I had the cash, I'd make a few kits... buy some superchargers, polish em up, get some mandrel bent pipes.
Ah well....
-Jon
The fact of not having to modify the exaust at all.
No messing with routing coolant lines.
No messing with oil lines.
This is MUCH easier.
The hardest part of this install, would be installing an S-AFC, and the mounting bracket.
Since zbrown has done the hard part of making the bracket and getting everything sized/lined up... if you could just re-create his bracket, sell them *******... you'd GURANTEE to sell some.
Hell, this could be a big canidate for a complete supercharging kit. Pre-made piping and everything.
Anybody up for the challenge??
If I had the cash, I'd make a few kits... buy some superchargers, polish em up, get some mandrel bent pipes.
Ah well....
-Jon
#203
Super Raterhater
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Cost of turboing my N/A, under $300, minus fuel (since it wasn't included in this thread) They both can be done for a fairly equal ammount of work/money.
#206
Rotors still spinning
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Originally posted by RETed
NOS is better bang for the buck.
-Ted
NOS is better bang for the buck.
-Ted
#207
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i preffer s/c over nos.. and i sometime prefer turbo over s/c but in this case "you're broke and your want power what you do, seek out the cheapest power adder".. get me the shape of the bracket and the material you use i'll make some bracket.. too much free time on my hand not gurantee on piping tho.. that your own preference.
#208
I wish I was driving!
Originally posted by rotarygod
An Eaton supercharger does not need any water or oil lines plumbed into it. That in itself is much less work. The stock T-II exhaust housing is so pathetic from a flow standpoint that there is alot of loss through it when you could be getting a gain from a good set of headers instead. It takes a T-II a couple of psi of boost just to get back to equal power of no turbo. That sounds like parasitic loss to me.
Yes turbo upgrades are easier. I will concede to that. This is just far less work. A T-II turbo would also need a new downpipe made and a spacer to make it clear the lower intake manifold. No more emissions control or 6 port actuators either. I don't see any way that this isn't the best upgrade for the money. There was never any claim that it had the most potential of any mod.
An Eaton supercharger does not need any water or oil lines plumbed into it. That in itself is much less work. The stock T-II exhaust housing is so pathetic from a flow standpoint that there is alot of loss through it when you could be getting a gain from a good set of headers instead. It takes a T-II a couple of psi of boost just to get back to equal power of no turbo. That sounds like parasitic loss to me.
Yes turbo upgrades are easier. I will concede to that. This is just far less work. A T-II turbo would also need a new downpipe made and a spacer to make it clear the lower intake manifold. No more emissions control or 6 port actuators either. I don't see any way that this isn't the best upgrade for the money. There was never any claim that it had the most potential of any mod.
As for power loss... how much of the difference in power can be attributed to the differences in intake ports, lower compression, and intake manifold design? IE: throw N/A stock exhaust onto a 4 port turbo engine, dyno it, and see what the horsepower is. It won't be anything close to the N/A HP values, due to the listed factors.
Turbochargers house a more efficient compressor than the eaton unit. Overall, I think the only benefit of this s/c is the low-end boost.
#211
I'm a boost creep...
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Originally posted by poor_red_neck
The fact of not having to modify the exaust at all.
The fact of not having to modify the exaust at all.
Those who think this is a cheaper way of getting turbo power levels are kidding themselves.
#212
Rotary Enthusiast
Originally posted by scathcart
And run out of steam big time on the top-end...
And run out of steam big time on the top-end...
http://www.automotive.eaton.com/prod...trols/M90.html
The Eaton M90 tops out at 525 CFM at 12,000 RPM. to determine if the SC will run out of steam "big time", you would have to know how many CFM a 13B moves at 8000 RPM?
How does the stock turbo compare?
#213
Rotary Enthusiast
zbrown:
I have a very big question for you...Is there any way you could measure the TEMPERATURE of the air coming out of the SC?
I'm trying to determine if this SC needs to be intercooled. From the Eaton website: at 5lbs of boost, the M90 can raise the intake temps about 50 degrees. If this is the case, you could easily see intake temps around 180-200 degrees F. Is this safe???
I have a very big question for you...Is there any way you could measure the TEMPERATURE of the air coming out of the SC?
I'm trying to determine if this SC needs to be intercooled. From the Eaton website: at 5lbs of boost, the M90 can raise the intake temps about 50 degrees. If this is the case, you could easily see intake temps around 180-200 degrees F. Is this safe???
Last edited by wozzoom; 04-06-04 at 08:41 AM.
#214
777** The Anti-rice
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Originally posted by NZConvertible
If you think an exhaust suitable for an NA motor is going to be just as suitable for a supercharged one then you're very wrong. Increasing the engine's airflow by 30-50% will always require a bigger exhaust, otherwise you're just strangling it.
Those who think this is a cheaper way of getting turbo power levels are kidding themselves.
If you think an exhaust suitable for an NA motor is going to be just as suitable for a supercharged one then you're very wrong. Increasing the engine's airflow by 30-50% will always require a bigger exhaust, otherwise you're just strangling it.
Those who think this is a cheaper way of getting turbo power levels are kidding themselves.
#215
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Ok, I recently bought a 86 N/A and am new to the whole RX7 scene. I've spent the last 3 days looking into every aspect of this build up!!! and it seems like a great idea for me because i already have a T-Bird S/C, but my BIGGEST QUESTION is how or if you can retard timing on these engines. With 7-8psi of boost on a car with 9.4:1 (mine, i think zbrown's is higher) your talking a C/R of around 13.5:1. Thats bad news. I really want to do this but without adjustable timing its most likely going to blow. If im missing something please tell me because im looking for all the information i can get and like i said, Im new to the 7's
#216
Jesus is the Messiah
Allright, my biggest question, what does fuel economy look like now?
I'm seeing 18 city right now, without a supercharger.
What would I see with one? 12? :-p
I doubt it would affect highway that much tho.
I'm seeing 18 city right now, without a supercharger.
What would I see with one? 12? :-p
I doubt it would affect highway that much tho.
#217
I'll have a Coke!
Originally posted by wozzoom
The Eaton M90 tops out at 525 CFM at 12,000 RPM. to determine if the SC will run out of steam "big time", you would have to know how many CFM a 13B moves at 8000 RPM?
The Eaton M90 tops out at 525 CFM at 12,000 RPM. to determine if the SC will run out of steam "big time", you would have to know how many CFM a 13B moves at 8000 RPM?
Originally posted by Phu5ion
I have wondered about that but never really got into it. Here is some information from Eaton's website about the M90.
Their website says it will flow over 500 CFM at redline. I did a quick calculation (anybody feel free to check me on this) and a S5 motor at 8000 RPM "should" move about 370 CFM.
I have wondered about that but never really got into it. Here is some information from Eaton's website about the M90.
Their website says it will flow over 500 CFM at redline. I did a quick calculation (anybody feel free to check me on this) and a S5 motor at 8000 RPM "should" move about 370 CFM.
#218
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Ok, I may be called an idiot for this, but can someone explain the bypass valve to me? I don't know too much about forced induction right now but I'm trying to learn and this sounds like a good project so can someone explain how the bypass valve piping is run? And what TYPE of valve he used?
#222
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If I had the cash, I'd make a few kits... buy some superchargers, polish em up, get some mandrel bent pipes.
Ah well....
-Jon [/B]
don't quit track....i'm j/k
#223
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Originally posted by greenchili
zbrown has a huge opportunity to make some capital for such a project if he did a write up and quit track!
don't quit track....i'm j/k
zbrown has a huge opportunity to make some capital for such a project if he did a write up and quit track!
don't quit track....i'm j/k
If somebody could make and sell these support brackets for the supercharger... you'd be in business right there.
For say... 50 bucks? I'd buy one right now. I dunno... how much for just a 1/4" steel bracket? Don't have to be "bling bling" and shiny with PERFECT welds or ...
I'm not looking for show under the hood. As long as it goes.
#224
777** The Anti-rice
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Originally posted by poor_red_neck
Yep.
If somebody could make and sell these support brackets for the supercharger... you'd be in business right there.
For say... 50 bucks? I'd buy one right now. I dunno... how much for just a 1/4" steel bracket? Don't have to be "bling bling" and shiny with PERFECT welds or ...
I'm not looking for show under the hood. As long as it goes.
Yep.
If somebody could make and sell these support brackets for the supercharger... you'd be in business right there.
For say... 50 bucks? I'd buy one right now. I dunno... how much for just a 1/4" steel bracket? Don't have to be "bling bling" and shiny with PERFECT welds or ...
I'm not looking for show under the hood. As long as it goes.