***Topgunz ROTREX C38R Supercharger Kit***

husam2012

Just had a friend buy this kit and install it himself and I ended up tuning it.

Honestly a great kit out of the box for someone who wants to use E85 otherwise you'll need to add a wastegate to the chargepipe coming out of the blower so you can limit boost.
Using the BOV and a mac valve sucks and it's not the proper way.

Aside from that, the newest kit (received a few weeks ago) only makes about 14~ psi uptop with the bumper on. That translates to around 550whp on 93 with really high EGTs and a little over 600whp on E85. Taking off the front bumper will raise boost by about 2-3 psi and add another 20-30 whp.

One big concern I saw is that installing the kit without modifying the front bumper to increase the airflow will make the engine overheat. We got the car to get to 230F coolant temps doing a 0-120 mph pull. Coolant is bled properly and there's no issues there. If you remove the bumper, the temps stay at a constant 190F which indiciates that there's way too much heat being generated.

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Ecutek Master Tuner (VQ37, VR30, VR38, B58, S55, S58)
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HapaZ

I'm experiencing this issue as well. I opened a few discreet holes with a hole saw in my bumper and I'm running at about 227-228 degrees on my coolant temps after pulls. I've been running around 220 degrees when cruising. Last night I opened up two more not-so-discreet holes with ducts to either side of the Nissan logo. I'm not a huge fan of the look. I haven't tested yet, but I'm hoping this will bring the temps down some at least. If not, I'm going with a Stillen bumper and vented hood.

FrankEtier

It's hot in Texas right now. 100 degrees everyday around Dallas where I live. I don't drive the Z everyday but when I do it is with AC on blast. Normal driving I see around 91C. If I make a pull it might go up to 101-104C but very shortly after it is back down around 90-91C. Having the AC on makes the radiator fan run constantly. I figured out that in the fall/winter when I'm driving with no AC the car actually runs hotter than in the summer. I think the programming is set for the fans to come on at 100C (212F) if AC is off.

My first supercharger kit so I don't have really any complaints or much to compare it to. It is not noisy like I have read the Vortech can be other than the BOV.

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