Kraftwerks Rotrex Supercharger Discussion

[bolecailey]

While interested, I would wait and see on both the jackson kit and kraftwerks kit. The kraftwerk kits for the mx5 and s2000 sold while jackson was still with them seemed to shred a lot of belts and have idler pulley issues. I know kratwerks was working on improvements but last I saw people were still having belt and idler pulley problems.

[gmsii]

Originally Posted by Adeets

Not to mention it says your Dynos were completed with a header and full exhaust. So shouldn't you post the header+full exhaust + tune vs your kit? Not doing so would be misleading.

1) even dynojets read different so really no point...easiest to just subtract base horsepower from end horsepower to find net hp gain
2) dont know why only the e85 graph was put up....don't know if it is misleading, but definitely an oversight by the marketing dept....we will make sure the 91+stock header+stock exhaust graph goes up on the site ASAP...thanks for pointing that out

again....anyone with a vortech should feel free to make an appointment to come by for a free dynotest

[Adeets]

Originally Posted by Sellout

Correct. that's definitely the wrong map.

The correct map is here: http://www.rotrex.com/media/7df7470f...30%20Range_pdf

So it's still around 75,000 rpm to make 9psi but efficiency is at 70% soooo that means really there's no difference, wonder if someone can get there boost graph.

[gmsii]

Originally Posted by bolecailey

While interested, I would wait and see on both the jackson kit and kraftwerks kit. The kraftwerk kits for the mx5 and s2000 sold while jackson was still with them seemed to shred a lot of belts and have idler pulley issues. I know kratwerks was working on improvements but last I saw people were still having belt and idler pulley problems.

since the Jackson's left to start their own company, the group-a engineering team has worked tirelessly to improve designs and correct any previous issues. today kraftwerks kits are setting the standard in supercharging kit design both in terms of reliability and performance.

the BRZ kit is a milestone in the sense that it represents the first product overlap since the split. we invite everyone to compare the features and designs of the two kits. the end products reflect the differences in design & engineering capabilities and philosophies of the respective companies

[Drift-Office]

Originally Posted by digital_assassin

@Drift-Office - You down to do a tune on this Bob? I currently have EcuTek. Ready to start talking with you about best options for this track build.

I'm always down! Besides, I've already done a HKS setup with a header so this shouldn't be too much different calibration wise, sans the higher boost! Looking forward to taking care of your needs!

Cheers!


Bob @ Drift-Office, LLC

[ATL BRZ]

Originally Posted by gmsii

checked out your link....that does not look like the compressor map for the c30-94
you can find it at rotrex.com under the technical section

Originally Posted by Sellout

Correct. that's definitely the wrong map.

The correct map is here: http://www.rotrex.com/media/7df7470f...30%20Range_pdf

http://www.aaperf.com/docs/Rotrex_Te...Range_V4.0.pdf

This is what I used. It's the C30-94 on page 6. It looks like the same map to me, the other one is just colorized and scaled differently. Are they completely different?

[Adeets]

Originally Posted by ATL BRZ

http://www.aaperf.com/docs/Rotrex_Te...Range_V4.0.pdf

This is what I used. It's the C30-94 on page 6. It looks like the same map to me, the other one is just colorized and scaled differently. Are they completely different?

Yeah it's a 10% change in efficiency, and the plot sticks you in a different spot, make a line up from .221 k/g per sec, then make a line to the right for 1.88 pressure ratio. Map them both out on the 2 spread sheets and you can see how different it is.

[ATL BRZ]

Originally Posted by Adeets

Yeah it's a 10% change in efficiency, and the plot sticks you in a different spot, make a line up from .221 k/g per sec, then make a line to the right for 1.88 pressure ratio. Map them both out on the 2 spread sheets and you can see how different it is.

Okay, well they both look like official Rotrex documentation.

The colored one must be newer and more accurate since it's hosted on the Rotrex site.

[digital_assassin]

I've never had any type of FI on a car so sorry if this is an ignorant question. Is the part in this picture a blow off valve?

[Noob4Life]

Originally Posted by digital_assassin

I've never had any type of FI on a car so sorry if this is an ignorant question. Is the part in this picture a blow off valve?

Looks like the bov to me

Sent from my SAMSUNG-SM-N900A using Tapatalk 4

[Sellout]

Originally Posted by ATL BRZ

Okay, well they both look like official Rotrex documentation.

The colored one must be newer and more accurate since it's hosted on the Rotrex site.

It's definitely scaled a little differently (higher PR on the Y axis. the X axis is the same, just worded differently), and definitely the same compressor (C30-94). The one I found doesn't include the part of the map that's outside of the charger's RPM limit, and the surge line is shaped differently. I wonder if they've changed the compressor housing design, or if they have a couple different housings that they use with that same compressor wheel. That could be the difference.

[nelsmar]

Originally Posted by gmsii

1) even dynojets read different so really no point...easiest to just subtract base horsepower from end horsepower to find net hp gain
2) dont know why only the e85 graph was put up....don't know if it is misleading, but definitely an oversight by the marketing dept....we will make sure the 91+stock header+stock exhaust graph goes up on the site ASAP...thanks for pointing that out

again....anyone with a vortech should feel free to make an appointment to come by for a free dynotest

I have a flex fuel capable vortech but running a slightly smaller pulley.... The benefit being I am dyno tuned for both fuel types (Cali 91) and e85. Full stock exhaust and everything. Although I am in AZ. So if no one sets anything up we could work something out. Brandon knows who I am . I think I'm roughly 10psi at redline. Maybe 10.5? I'm not sure at your elevation. I would have to check my old logs and see if I have an atmospheric reading.

[gmsii]

Originally Posted by digital_assassin

I've never had any type of FI on a car so sorry if this is an ignorant question. Is the part in this picture a blow off valve?

that is indeed a blow off valve. although the picture shows it as going to free-air, there is actually a hose that connect between the bov and the intake pipe. We did not connect them because the intake pipe we used is an FDM rapid prototype which is fragile compared to the actual production rotomolded material.

[ATL BRZ]

Originally Posted by gmsii

that is indeed a blow off valve. although the picture shows it as going to free-air, there is actually a hose that connect between the bov and the intake pipe. We did not connect them because the intake pipe we used is an FDM rapid prototype which is fragile compared to the actual production rotomolded material.

So it's actually a diverter valve, not a blowoff valve.