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-   -   ***Topgunz ROTREX C38R Supercharger Kit*** (http://www.the370z.com/forced-induction/135649-topgunz-rotrex-c38r-supercharger-kit.html)

Peabo 04-23-2021 05:36 PM

Quote:

Originally Posted by VHRpurr (Post 3992386)
....furthermore it’s typically not the HP value that destroys the motors it’s the torque getting beyond about 500wtq that blows the connecting rods through the block. It’s like an unwanted axe throwing contest inside your engine, you’re just waiting to see which one of 6 punches a hole first. Superchargers in general have a linear curve so if you hit 500wtq it’s at the very top near redline, your motor is spinning at a high RPM so it’ll wear the motor out less quickly. On the flip side, twin turbo setups make torque very low in the RPM band which puts a lot of turning/twisting force on those con rods which is how you end up having a bad day if you just “tune for max HP”, disregard the fact you’re making 550+ tq, and give ‘er a full send or 2, hope you got $$$ for a built block. Then again, the torque pulling you like a freight train down low is what people love. It’s all what you want to do.

Still need to see a dyno or driving video of the TG C39-110 kit.... I need to hear some S/C soundsssss :driving:

But the Fast Intentions Twin Turbo guys have been running over 550wtq for years - some at 580wtq.

INFmstrTech 04-29-2021 12:31 PM

Quote:

Originally Posted by Optimiser (Post 3991874)
Can you prove/validate your 15psi? Pulleys, SC rpm, SC trim, SC bearing upgrade, accuracey of boost gauge, etc? How do you know people making less than 15psi is due to belt slip? How did you figure out and know "proper belt tension"?

Stillin plenum with A2A setup....15.2 psi with a v3 SCi trim 2.87 serpentine pulley, 3.47 jackshaft pulley, 2.95 supercharger pulley, K&N filter. Validated through EcuTek data log. I’m sure if I had an Si or upgraded Ti trim and no filter it may be more...but that v3 can’t take that abuse for long before the oil slinger is destroyed and is eaten by the gears-trust me on that.

Optimiser 04-29-2021 08:43 PM

Quote:

Originally Posted by INFmstrTech (Post 3993568)
Stillin plenum with A2A setup....15.2 psi with a v3 SCi trim 2.87 serpentine pulley, 3.47 jackshaft pulley, 2.95 supercharger pulley, K&N filter. Validated through EcuTek data log. I’m sure if I had an Si or upgraded Ti trim and no filter it may be more...but that v3 can’t take that abuse for long before the oil slinger is destroyed and is eaten by the gears-trust me on that.

I have also have Stillin plenum with A2A setup but about 2000rpm slower with my pulley sizes (checked with Vortex calculator), but with upgraded Si trim and only get 10psi. I'm also running the "standard" belts on serp and SC. Are you using the Gates "RPM" belt(s)?
I have ordered these to see if they will help with boost, otherwise I have no idea how you could get 50% more boost than me, but would love to know.

DrBacon 04-30-2021 06:08 AM

Quote:

Originally Posted by Optimiser (Post 3993640)
I have also have Stillin plenum with A2A setup but about 2000rpm slower with my pulley sizes (checked with Vortex calculator), but with upgraded Si trim and only get 10psi. I'm also running the "standard" belts on serp and SC. Are you using the Gates "RPM" belt(s)?
I have ordered these to see if they will help with boost, otherwise I have no idea how you could get 50% more boost than me, but would love to know.

https://i.imgur.com/Z9ihOTR.png

It does happen. I have nothing more than a stock v3 SI and an RPM belt on the supercharger side (planning on trying to add one to the serp side as well as an experiment in the near future). I really can't stress enough how much of a difference that RPM belt makes. That normal belt stretches VERY quickly and begins to slip as a result. The last dyno run I did with the "normal" belt was at 10.5psi because of how bad it got.

I don't think we should continue to derail Topgunz topic with this old kit talk though.

TopgunZ 04-30-2021 07:18 AM

True. Lets get back on topic here.

We are going back to the Dyno on Monday and will have additional boost level logs to share. I think we will do a 15psi log, 20psi and then also one where we remove the filter system to see where the kit can go. However, we will most likely run out of fuel again so we will chop throttle at 100% duty cycle and then superimpose the boost line to show what the kit could do if someone were to string it all the way out.

I was talking to a guy on the phone last night and he was saying that he was trying for the NA record and was taking his motor up to 8500rpm on the dyno. He is now going built block and this kit. Cant wait to see someone run this thing up.

DrBacon 04-30-2021 07:29 AM

Quote:

Originally Posted by TopgunZ (Post 3993669)
True. Lets get back on topic here.

We are going back to the Dyno on Monday and will have additional boost level logs to share. I think we will do a 15psi log, 20psi and then also one where we remove the filter system to see where the kit can go. However, we will most likely run out of fuel again so we will chop throttle at 100% duty cycle and then superimpose the boost line to show what the kit could do if someone were to string it all the way out.

I was talking to a guy on the phone last night and he was saying that he was trying for the NA record and was taking his motor up to 8500rpm on the dyno. He is now going built block and this kit. Cant wait to see someone run this thing up.

Stock intake manifold? I recall there being problems where the stock manifold can crack at those higher boost pressures.

Spooler 04-30-2021 07:52 AM

Quote:

Originally Posted by DrBacon (Post 3993671)
Stock intake manifold? I recall there being problems where the stock manifold can crack at those higher boost pressures.

It should last at that. Mine started leaking after a good day of running 25psi of boost. That boost pressure was at 4000rpms all the way to 8k.

TopgunZ 04-30-2021 07:55 AM

Quote:

Originally Posted by DrBacon (Post 3993671)
Stock intake manifold? I recall there being problems where the stock manifold can crack at those higher boost pressures.

Yes stock manifold.

Do you have a picture of one of these cracked ones? I think its more of a scare tactic for people to buy unnecessary parts and spend money.

Spooler 04-30-2021 08:20 AM

Quote:

Originally Posted by TopgunZ (Post 3993673)
Yes stock manifold.

Do you have a picture of one of these cracked ones? I think its more of a scare tactic for people to buy unnecessary parts and spend money.

WRONG, they don't crack. They start leaking at the back. 20psi should be fine. I ran 22psi with no issues. 25psi, forget it. If you get up in the 20psi range that is build
motor territory anyways.

INFmstrTech 05-05-2021 12:16 PM

[QUOTE= I don't think we should continue to derail Topgunz topic with this old kit talk though.[/QUOTE]

Agreed, just wanted to relay how it was achieved. That being said...I would MUCH MUCH rather move to the rotrex setup. Much easier to reach HP #’s(if your chasing that), the efficiency of the supercharger to me is one of the biggest pros; plus I HATE the Stillen manifold...I have the jx/qx60/maxima(whatever you want to go with there) T/B’s and adapters that absolutely do not fit because of the location of the Stillen mounting for the stock t/b. Having the stock manifold would just be that much better, especially with the bigger t/b’s. Super impressive Topgunz-keep up the fantastic work!

HapaZ 05-06-2021 05:47 PM

How'd that dyno-day turn out?

TopgunZ 05-06-2021 06:18 PM

Quote:

Originally Posted by HapaZ (Post 3994324)
How'd that dyno-day turn out?

It's this coming Monday.

Dahawkster 05-07-2021 02:54 AM

Quote:

Originally Posted by TopgunZ (Post 3994327)
It's this coming Monday.

Shucks, I kept checking for the results thinking it was this past Monday lol

TopgunZ 05-07-2021 07:36 AM

Quote:

Originally Posted by Dahawkster (Post 3994388)
Shucks, I kept checking for the results thinking it was this past Monday lol

It was supposed to be but by the time we received the new injectors and had them in we only had a day to road tune prior to the dyno and it was raining that day. So we had to push it back.

FrankEtier 05-16-2021 12:29 PM

Quote:

Originally Posted by TopgunZ (Post 3994403)
It was supposed to be but by the time we received the new injectors and had them in we only had a day to road tune prior to the dyno and it was raining that day. So we had to push it back.

Any updates Aaron?


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