Topgunz ROTREX C38R Supercharger Kit

HapaZ · 07-29-2022, 09:04 AM

Quote:

Originally Posted by SwedeZ

I got my car back a couple of weeks ago but I've been away on vacation, so haven't had time to post an update...

In summary, the car runs really great (and sounds amazing) but we had to limit ourselves to 480 whp due to me being on stock tyres. Even with just 480 whp the traction control light flashes now and then on full throttle even i fourth gear (dry surface; highway).

Once I find time (well, money) to upgrade wheels and rubber, we'll bump the power up. Possibly next summer.

However, I have one major issue. Start issues. The engine REALLY struggles to fire. Especially when cold.

My tuner (one local to me here in Sweden) is having a hard time improving it. I have a feeling it could be related to injectors/fueling, but I'm no expert whatsoever. The car had zero issues before the kit got installed alongside Injector Dynamics 1050cc and other supporting mods.

It really, really pains me to start it up. Here's a clip of it. Just before I shot this clip, I attempted another start which I cancelled after 8 seconds by pressing the start button again. It just wouldn't fire up. The second attempt is usually successful but only if I help a little by blipping the throttle. If I don't to this, it'll die right after it fires.

Any ideas? Is this a common issue with large injectors?

I'd go with what Aaron has to say, but one other thing to consider is your battery. I had a longer than typical start on my original battery from 2011, but replacing it with a new one improved cold starts for me.

JVerge5363 · 07-29-2022, 05:32 PM

So, with the New Rotrex kit now installed along with upgraded 1340cc injectors we are only seeing 550whp @14 psi which is the same thing we saw with the previous kit. Car is still in the shop at RT Tuning. They have been in contact with Aaron so we'll see how it goes going forward. I was also told anything above 600whp on 93 might see some detonation. My goal was 625wph to 650hp on max boost but if we can't get there, I may be looking into methanol injection. If anybody has any thoughts or suggestions, I'm all ears. Thanks!

FX-32 · 08-01-2022, 07:41 AM

Quote:

Originally Posted by JVerge5363

So, with the New Rotrex kit now installed along with upgraded 1340cc injectors we are only seeing 550whp @14 psi which is the same thing we saw with the previous kit. Car is still in the shop at RT Tuning. They have been in contact with Aaron so we'll see how it goes going forward. I was also told anything above 600whp on 93 might see some detonation. My goal was 625wph to 650hp on max boost but if we can't get there, I may be looking into methanol injection. If anybody has any thoughts or suggestions, I'm all ears. Thanks!

Use E85, it's much safer, burns cooler, yields more power and in a safer way.

You need the sensor. I am using Zeitronix kit from SpecialtyZ, call them or email so they can send you the correct parts for your setup.

E85 stations

BC416 · 08-01-2022, 01:48 PM

Quote:

Originally Posted by FX-32

Use E85, it's much safer, burns cooler, yields more power and in a safer way.

You need the sensor. I am using Zeitronix kit from SpecialtyZ, call them or email so they can send you the correct parts for your setup.

E85 stations

Not readily available in NJ.

Spooler · 08-01-2022, 05:43 PM

Quote:

Originally Posted by BC416

Not readily available in NJ.

Yeah, you are limited.

https://afdc.energy.gov/fuels/ethano...n=New%20Jersey

JVerge5363 · 08-02-2022, 12:03 PM

Quote:

Originally Posted by FX-32

Use E85, it's much safer, burns cooler, yields more power and in a safer way.

You need the sensor. I am using Zeitronix kit from SpecialtyZ, call them or email so they can send you the correct parts for your setup.

E85 stations

Unfortunately, E85 is not readily available in my area.

Elmo370z · 08-01-2022, 04:48 PM

Quote:

Originally Posted by JVerge5363

So, with the New Rotrex kit now installed along with upgraded 1340cc injectors we are only seeing 550whp @14 psi which is the same thing we saw with the previous kit. Car is still in the shop at RT Tuning. They have been in contact with Aaron so we'll see how it goes going forward. I was also told anything above 600whp on 93 might see some detonation. My goal was 625wph to 650hp on max boost but if we can't get there, I may be looking into methanol injection. If anybody has any thoughts or suggestions, I'm all ears. Thanks!

Should of went with a turbo if you’re expecting those number out of a blower using pump gas.

SwedeZ · 08-02-2022, 08:55 AM

Quote:

Originally Posted by Elmo370z

Should of went with a turbo if you’re expecting those number out of a blower using pump gas.

I am also planning to eventually bump the power to around 625 - or at the very least 600 - using pump gas. Top Gun mentions on their website that this should be possible with the kit, so fingers crossed...

I do have E85 at a few stations near me, so I might go down that road in the future if need be.

JVerge5363 · 08-02-2022, 12:18 PM

Quote:

Originally Posted by SwedeZ

I am also planning to eventually bump the power to around 625 - or at the very least 600 - using pump gas. Top Gun mentions on their website that this should be possible with the kit, so fingers crossed...

I do have E85 at a few stations near me, so I might go down that road in the future if need be.

Best of luck to you! I have every supporting mod required and we were limited to approximately 570whp at 16 psi, hence why I am adding the methanol injection.

Spooler · 08-02-2022, 12:33 PM

Quote:

Originally Posted by JVerge5363

Best of luck to you! I have every supporting mod required and we were limited to approximately 570whp at 16 psi, hence why I am adding the methanol injection.

That sucks. I made 585whp at 12psi with turbos. I didn't even push it though because it is 93oct.

FrankEtier · 08-02-2022, 01:38 PM

Quote:

Originally Posted by JVerge5363

Best of luck to you! I have every supporting mod required and we were limited to approximately 570whp at 16 psi, hence why I am adding the methanol injection.

What is the tuner saying the limitation is on your car?

BettyZ · 08-02-2022, 08:09 PM

Quote:

Originally Posted by FrankEtier

What is the tuner saying the limitation is on your car?

The lack of a twin turbo kit.

JVerge5363 · 08-02-2022, 09:11 PM

Quote:

Originally Posted by FrankEtier

What is the tuner saying the limitation is on your car?

From my understanding, they can't get any more than 16psi and mentioned a fear of knock with anything over 600whp. Not sure if my tuner is afraid to bring it up more or if this kit just doesn't live up to the hype. I'm definitely not worried about pushing the limits.

Elmo370z · 08-03-2022, 09:19 AM

Quote:

Originally Posted by JVerge5363

Best of luck to you! I have every supporting mod required and we were limited to approximately 570whp at 16 psi, hence why I am adding the methanol injection.

That’s lot of boost for 570whp.

Spooler · 08-03-2022, 09:50 AM

Quote:

Originally Posted by Elmo370z

That’s lot of boost for 570whp.

It's because the timing is retarded due to the fuel. 16 psi on E85 should be around 700whp on a turbo car.

07-29-2022, 05:32 PM	#2 (permalink)
JVerge5363 Base Member Join Date: Apr 2013 Location: Manahawkin NJ Posts: 105 Drives: 12' Roadster Sport M Rep Power: 13	So, with the New Rotrex kit now installed along with upgraded 1340cc injectors we are only seeing 550whp @14 psi which is the same thing we saw with the previous kit. Car is still in the shop at RT Tuning. They have been in contact with Aaron so we'll see how it goes going forward. I was also told anything above 600whp on 93 might see some detonation. My goal was 625wph to 650hp on max boost but if we can't get there, I may be looking into methanol injection. If anybody has any thoughts or suggestions, I'm all ears. Thanks! __________________ TopgunZ C38R SC // Rotrex // CJM // ID 1340cc // Walbro 525 Hellcat // Ecuteck // 4 Bar Map Sensor // Z1 Oil Cooler // Tial // Prosport JDM // South Bend Stg 3 // ACT // RT Tuning Install and Tune // Motordyne ART // Berk CBE // Michelin PS4S 305/30/19R 265/35/19F

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***Topgunz ROTREX C38R Supercharger Kit***

Topgunz ROTREX C38R Supercharger Kit