ProCharger
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08-15-2008, 11:43 PM
#59
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Now, I had a procharger c1 for my previous car (Nissan Sentra SER Spec v) (I miss boost very much) and I found it to be AWESOME with the 2.5L engine and really short gearing.
Compared to other turbo systems it didn't make as much low end torque and gave me a very linear powerband (although I was still making 220 ft-lb of torque @ 2500rpm on a mustang dyno) and I had tons of trouble maintaining traction, but with the tuning tools available for the car (SAFC-II) it made it MUCH easier to tune than a turbo system as well.
I loved it for the ease of tuning, the unique sound it makes at idle and when you are at WOT it sounds like a jet turbine, and if you have your BOV set to vent to atmosphere when you let go of the gas it vents for a VERY long time (even in neutral!)
But for the RX8 I miss the torque, tuning is done by an accessport, and I'm not sure if the procharger would be the best kit for the $$$ for the RX8.
The Kit looks amazing, and I like the fact the oil is self contained, but low-mid range torque is awesome to have =)
Compared to other turbo systems it didn't make as much low end torque and gave me a very linear powerband (although I was still making 220 ft-lb of torque @ 2500rpm on a mustang dyno) and I had tons of trouble maintaining traction, but with the tuning tools available for the car (SAFC-II) it made it MUCH easier to tune than a turbo system as well.
I loved it for the ease of tuning, the unique sound it makes at idle and when you are at WOT it sounds like a jet turbine, and if you have your BOV set to vent to atmosphere when you let go of the gas it vents for a VERY long time (even in neutral!)
But for the RX8 I miss the torque, tuning is done by an accessport, and I'm not sure if the procharger would be the best kit for the $$$ for the RX8.
The Kit looks amazing, and I like the fact the oil is self contained, but low-mid range torque is awesome to have =)
08-16-2008, 05:47 PM
#60
the blow through MAF is very interesting. how does the std pcm know that hotter is denser? is it just a MAF calibration trick?
could you mount the MAF after the throttle in a blow through setup?
could you mount the MAF after the throttle in a blow through setup?
08-16-2008, 06:25 PM
#62
how does it take into account density? it compensates for atmospheric variation by a sensor near the air pump vented to atmosphere. it knows temp, it is calibrated for volume, but how is the pressure factored in?
08-16-2008, 07:59 PM
#63
Air is air, the maf and ecu do not care if it is pressurized or not. Based on the calculated load the ecu will provide X fuel and have x timing. Check the first page of the accessport thread and it is explained in more detail.
Last edited by Highway8; 08-16-2008 at 08:02 PM.
08-20-2008, 03:56 AM
#64
is adjusting valve lash
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Okay, so I am wrong about how fast your turbo is spooling up and getting to full boast. I was speaking from the experiance I have had with turbocharged vehicles.
Dont get me wrong, I think that the turbo rx8's are very fast and can probably make more power in most situations, but everyone is judging the DNA procharger kit on 1 mazdatrix Non-tunned, week motor, 6psi dyno pull. The kit can proform much better. Look at the DNA motorsports dyno charts. Now I dont know how to read torque on there charts, but a stock RX8 gets about 140-150 HP and a procharged 10PSI kit is breaking 300HP, that is a 100% increase. When HP and TQ numbers are being quoted for turbo kits, everyone is using the best results from a properly tunned vehicle. It would only be fair to do the same for the DNA procharger kit, the problem is that we dont have enough data look at.
Dont get me wrong, I think that the turbo rx8's are very fast and can probably make more power in most situations, but everyone is judging the DNA procharger kit on 1 mazdatrix Non-tunned, week motor, 6psi dyno pull. The kit can proform much better. Look at the DNA motorsports dyno charts. Now I dont know how to read torque on there charts, but a stock RX8 gets about 140-150 HP and a procharged 10PSI kit is breaking 300HP, that is a 100% increase. When HP and TQ numbers are being quoted for turbo kits, everyone is using the best results from a properly tunned vehicle. It would only be fair to do the same for the DNA procharger kit, the problem is that we dont have enough data look at.
but seriously here, if there is a better SC out there, if there was...
i'm not saying i don't love turbo's myself and the fundaments on how it works, but i do have to say i wouldn't pick/choose a turbo over a SC anyday now. now that would be extreme and just idiotic.
i have to say in this particular set-up, it really depends on the application.
say your goal is quite minimal. say your goal is to increase hp/tq without intruding into other parameters or the balance of the car. say you wanted to keep your reliability and reversibility of the mod to near stock. and lets just say your goal is 50hp or lower and axial flow SC actually made something for that at a fraction of everything to its turbo'd counterparts.
at the lightest weight added possible. without intercooler, oil lines, diminished cooling, reliability and upsetting weight balance... not ALL types of superchargers, but wouldn't the RIGHT supercharger be the correct choice?
the single only disadvantage in turbo's for our app is its complexity, and the nature of our fragile engine, and... of course, all the other tidbits that may add weight and contribute to additional heat.
all i'm trying to add is, without a major hp increase goal, a SC may find its way into the right place. and actually waiting for a nicely done packaged SC is a waiting game... and one by axial flow caught my interest.
always have wanted to put together a turbo or get a OTS kit. but i must say, dave gave me a ride, and its a decently quick SC car. mazdatrix's SC is...nice!
my 2cent
08-21-2008, 01:26 AM
#70
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that thing looks mean. can't wait to hear your results
09-22-2008, 01:11 AM
#72
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TVS SC on a RX8?
Does anyone have an opinion on how successful one may be trying to fit the following SC kit to the RX8...These are serious new generation units currently available on Audis.
The new patented TVS(TM) design features four-lobe rotors and high-flow inlet and outlet ports that greatly enhance thermal efficiency, enabling greater volumetric capacity at higher revolutions per minute (RPM). Previous Eaton Roots-type designs featured only three-lobe rotor assemblies. The new TVS(TM) supercharger design is scalable and adaptable to virtually all engine designs.
The new patented TVS(TM) design features four-lobe rotors and high-flow inlet and outlet ports that greatly enhance thermal efficiency, enabling greater volumetric capacity at higher revolutions per minute (RPM). Previous Eaton Roots-type designs featured only three-lobe rotor assemblies. The new TVS(TM) supercharger design is scalable and adaptable to virtually all engine designs.
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