Built 1.6L C30-94 Rotrex 14.8PSI peak
07-30-2011, 04:59 PM
#2
Good stuff man, looking great.
So smooth, and nearly 300 aint no joke. FFS kru can only wet dream about this much power
why'd you start the pull so late though? I know it doesn't make much hp/tq that low anyway, but still.
PS: this setup will probably be hands down fantastic on the track
So smooth, and nearly 300 aint no joke. FFS kru can only wet dream about this much power
why'd you start the pull so late though? I know it doesn't make much hp/tq that low anyway, but still.
PS: this setup will probably be hands down fantastic on the track
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07-30-2011, 05:07 PM
#4
With the 13's it's almost perfect. Once I go to a 3.9 final drive and a 6 spd it will be perfect for what I want. It's basically only a track car and I'm never below 5kRPM. It's a whole different style of powerband, and I encourage you guys to try to get a ride a long in somones Rotrex'd car at least once. It may not be your thing but check it out.
It's fast. It pulls hard all the way to 8k with no hints of falling off. I can only thank GotPSI?'s intake manifold for that. No way the powerband would look like it does with a stock manifold.
As for the pull, I don't know I didn't do it. It was really cheap to do the pulls so I'm not complaining. You're right it makes **** all down there.
In for trolling the FFS cr3w.
http://forum.miata.net/vb/showthread...00#post5294000
It's fast. It pulls hard all the way to 8k with no hints of falling off. I can only thank GotPSI?'s intake manifold for that. No way the powerband would look like it does with a stock manifold.
As for the pull, I don't know I didn't do it. It was really cheap to do the pulls so I'm not complaining. You're right it makes **** all down there.
In for trolling the FFS cr3w.
http://forum.miata.net/vb/showthread...00#post5294000
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07-30-2011, 06:06 PM
#13
Yeah. The Rotrex is geared to it's max RPM already. So unless I lower my RPM limit I can't run a smaller pulley. 15PSI is enough anyways...
With a small turbo spooling 8-10PSI down low to add some torque and feeding the Rotrex inlet it could be interesting.
There is a guy with a 4AGE running a HX40 and a Rotrex, but the Rotrex feeds the turbo. I sent him a message on youtube to try to get some more information.
With a small turbo spooling 8-10PSI down low to add some torque and feeding the Rotrex inlet it could be interesting.
There is a guy with a 4AGE running a HX40 and a Rotrex, but the Rotrex feeds the turbo. I sent him a message on youtube to try to get some more information.
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07-30-2011, 07:29 PM
#14
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I would have the turbo feeding into the rotrex. In this configuration you would not be limited by the compressor of the rotrex as much. Youll be able to run a relatively big turbo and still spool quickly due to the supercharger, but thats just a little bonus.
The real reason to run in this configuration will be that the supercharger will be offsetting the pressure difference between the intake manifold and exhaust manifold. In other words, there will be improved exhaust scavenging which is interesting since poor scavenging is the bane of any serious turbo setup. With better scavenging you will be able to run more aggressive timing, be less prone to detonate, and will thus make more power.
This is all dependent on how much work each compressor does though. You can keep scavenging very high with your current pulley ratio and have the turbo only adding a little boost up top, or you could lower your ratio and try to get the turbo and rotrex closer to their efficiency island at the cost of scavenging and possibly a little bit of spool.
The real reason to run in this configuration will be that the supercharger will be offsetting the pressure difference between the intake manifold and exhaust manifold. In other words, there will be improved exhaust scavenging which is interesting since poor scavenging is the bane of any serious turbo setup. With better scavenging you will be able to run more aggressive timing, be less prone to detonate, and will thus make more power.
This is all dependent on how much work each compressor does though. You can keep scavenging very high with your current pulley ratio and have the turbo only adding a little boost up top, or you could lower your ratio and try to get the turbo and rotrex closer to their efficiency island at the cost of scavenging and possibly a little bit of spool.
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07-30-2011, 09:19 PM
#17
I would have the turbo feeding into the rotrex. In this configuration you would not be limited by the compressor of the rotrex as much. Youll be able to run a relatively big turbo and still spool quickly due to the supercharger, but thats just a little bonus.
The real reason to run in this configuration will be that the supercharger will be offsetting the pressure difference between the intake manifold and exhaust manifold. In other words, there will be improved exhaust scavenging which is interesting since poor scavenging is the bane of any serious turbo setup. With better scavenging you will be able to run more aggressive timing, be less prone to detonate, and will thus make more power.
This is all dependent on how much work each compressor does though. You can keep scavenging very high with your current pulley ratio and have the turbo only adding a little boost up top, or you could lower your ratio and try to get the turbo and rotrex closer to their efficiency island at the cost of scavenging and possibly a little bit of spool.
The real reason to run in this configuration will be that the supercharger will be offsetting the pressure difference between the intake manifold and exhaust manifold. In other words, there will be improved exhaust scavenging which is interesting since poor scavenging is the bane of any serious turbo setup. With better scavenging you will be able to run more aggressive timing, be less prone to detonate, and will thus make more power.
This is all dependent on how much work each compressor does though. You can keep scavenging very high with your current pulley ratio and have the turbo only adding a little boost up top, or you could lower your ratio and try to get the turbo and rotrex closer to their efficiency island at the cost of scavenging and possibly a little bit of spool.
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07-31-2011, 02:51 AM
#18
I guess I forgot to mention that this power is on 91 octane. Not 100 octane race gas like trackdayhookeys car. 
If I dumped my rev limit to 7k like his and geared the Rotrex accordingly and added 100octane race fuel I'm sure the car would be well into the mid 300's.
Hmmmmmmmm.....
If I dumped my rev limit to 7k like his and geared the Rotrex accordingly and added 100octane race fuel I'm sure the car would be well into the mid 300's.
Hmmmmmmmm.....
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07-31-2011, 02:42 PM
#20
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Your car must have the smoothest power delivery of any miata, I wish you where local so I could drive it and feel the difference between your rotex, and my turbo set up since our motors are build so similar. its awesome to see the power and torque building from 3200 rpm and still climbing at 8K. Thanks for putting on the dyno.
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