Topgunz ROTREX C38R Supercharger Kit

TopgunZ · 12-18-2021, 06:27 PM

Quote:

Originally Posted by Birdiev

Forgot to mention that he was still getting the afr on point that way the graphs very a bit

You really need to display the boost graph vs the afrs. Afrs mean nothing here where psi is what we are looking for. I know it's difficult to obtain them. I've been to 50 dyno sessions over 20 tuners and getting them to print or send you what you ask for is like pulling teeth!!! It's been a mystery to me and my buds since I started into cars.. lol. ��

However what we can see from your graph is that the cars performance is almost identical up to 4500rpm weather your running 10psi map or 17psi. Again, mid range power is way up from other centrifugal chargers. If you were running a different centri charger kit you wouldn't see 10psi until redline and the power band would follow suit being lower.

redondoaveb · 12-18-2021, 08:09 PM

Here's my dyno sheet with the wastegate set up as a comparison

Mr.K · 12-18-2021, 08:29 PM

Quote:

Originally Posted by redondoaveb

Here's my dyno sheet with the wastegate set up as a comparison

Interesting, your low/mid torque numbers are slightly lower that what I've seen. Usually I see 400wtq being hit at 4.0K RPMs.

redondoaveb · 12-18-2021, 08:33 PM

Quote:

Originally Posted by Mr.K

Interesting, your low/mid torque numbers are slightly lower that what I've seen. Usually I see 400wtq being hit at 4.0K RPMs.

That was with the Vortech V3

redondoaveb · 12-18-2021, 08:40 PM

This one did hit 400 with at 4K

Mr.K · 12-18-2021, 08:41 PM

Quote:

Originally Posted by Birdiev

Not sure if this graph will help any one out. My tuner was was a bit unfamiliar of how to bleed off boost on this setup. Took four tries before he got it figured out.This was on 93 and as you can see the S/C appears to kick in at about 3700 or so.he had a boost cut at 15 psi and was getting it dial in at about 9.5. So first four runs peak boost of 15 psi at about 5500 to 5700 rpm.Last run was finally at 9.5psi.

Guys please keep in mine that when you are getting on it your cars rpm will drop down to 5000 to 5500 hundred depending on the gear.So Any power behind that is something you will never really use unless your in first gear.This is where you guys with rev match transmission can shine because of boost by gear. No boost on first gear would be great because who can really run 600whp in that gear without spinning. Unless you have a killer setup. Anyway everyone has different goals so come the different views. Hopefully this graph helps on how this efficient this kit is. Almost forgot the whp is predictable with more psi but we noticed the torque curve hold way longer(doesn't drop off)throughout the powerband.

I think it depends on how you use your car as you stated. Some guys don't see the lower RPMs but some like myself love to use the entire powerband. So for someone like your self the lower RPMs might not matter as much. Around corners and digs are where the lower RPMs shine. You'll definitely need more grip, better traction and suspension to put the power down

.

Mr.K · 12-18-2021, 08:43 PM

Quote:

Originally Posted by redondoaveb

This one did hit 400 with at 4K

My bad, nice numbers! Your low end (<3K) looks great too! Was that on e85 or 93?

Mr.K · 12-18-2021, 08:47 PM

Quote:

Originally Posted by TopgunZ

You really need to display the boost graph vs the afrs. Afrs mean nothing here where psi is what we are looking for. I know it's difficult to obtain them. I've been to 50 dyno sessions over 20 tuners and getting them to print or send you what you ask for is like pulling teeth!!! It's been a mystery to me and my buds since I started into cars.. lol. ��

However what we can see from your graph is that the cars performance is almost identical up to 4500rpm weather your running 10psi map or 17psi. Again, mid range power is way up from other centrifugal chargers. If you were running a different centri charger kit you wouldn't see 10psi until redline and the power band would follow suit being lower.

Speaking of pulling teeth, are we going to get any details on those pulleys??

redondoaveb · 12-18-2021, 08:55 PM

Quote:

Originally Posted by Mr.K

My bad, nice numbers! Your low end (<3K) looks great too! Was that on e85 or 93?

That was the same blower as the previous dyno sheet but a smaller sc pulley and on e85

Mr.K · 12-18-2021, 10:36 PM

Quote:

Originally Posted by redondoaveb

That was the same blower as the previous dyno sheet but a smaller sc pulley and on e85

Oh wow! So you can replicate results by throwing everything at the older kits. Should mean this kit only has that much more potential since it is able to spin much much higher

.

Birdiev · 12-18-2021, 10:47 PM

[QUOTE=TopgunZ;4016315]You really need to display the boost graph vs the afrs. Afrs mean nothing here where psi is what we are looking for.

Yea your right,I guess you just have to take my word for it .I was trying to show that I was hitting 15 psi at 5200rpm. Thats why the graphs stop there because of the set boost cut.Meaning anyone running that psi or under will be there by 5200 vs the traditional centrifugal SC setup at 7500.

Of course hp numbers will vary depending on variables but psi should never change as its belt driven and S/C will spin at set rpm vs engine rpm.

Now writing this out , I take it back.Lol.Thinking about it a built engine with say maybe bored,4.2 will have made lower psi at same rpm as it needs more volume to fill the cylinders.

TopgunZ · 12-19-2021, 06:26 AM

Redondo really pushed the V3. Even overspinning it on the ACE kit we only get 15psi with a turboguard. If you run that blower at it's max recommend from factory it is around 14.5psi with a turboguard. With a proper filter setup (an actual cone filter) it's 12psi.

I can't recall but I think Redondo's oil slinger ate itself apart around 17psi...? I know Soho did a write up where it starts to spit oil out at 18psi. From what I've seen anything over 15psi puts that unit on a yearly rebuild list. Past that the oil slinger cavitates the oil and turns it into a froth not allowing proper cooling since it is self contained. That's when things go bad. (Straight from Vortech).

Mr.K · 12-20-2021, 12:03 PM

Quote:

Originally Posted by TopgunZ

Redondo really pushed the V3. Even overspinning it on the ACE kit we only get 15psi with a turboguard. If you run that blower at it's max recommend from factory it is around 14.5psi with a turboguard. With a proper filter setup (an actual cone filter) it's 12psi.

I can't recall but I think Redondo's oil slinger ate itself apart around 17psi...? I know Soho did a write up where it starts to spit oil out at 18psi. From what I've seen anything over 15psi puts that unit on a yearly rebuild list. Past that the oil slinger cavitates the oil and turns it into a froth not allowing proper cooling since it is self contained. That's when things go bad. (Straight from Vortech).

On your kit, the way you currently have it set up, how close is the Rotrex unit to being maxed out?

osmosizzz · 12-23-2021, 11:48 PM

Quote:

Originally Posted by TopgunZ

That's lots of little secrets but can't spill them all.

We are actually creating 3 different pulley setups now. You will be able to select the standard set, race set or Max set. We need to test these still but the max setup will come with Carbonite coated pulleys and cost more but will be reserved for built motors only.

Check out Carbonite coatings if you haven't seen or heard of it. There's also a high grip option called reichard.

We will always strive to improve. Most of the time I'm not even sure what that is until it happens. Lol .

Have you looked into grip-tec? I had a buddy run Carbonite and he was going through belts often. I went the griptec route and change belts once every 8-10 months. This is a 6 rib powering the rotrex C38R. Currently it holds 17psi with a wastegate duty set at 45

Love what you've done with the C38R on this platform btw. Uploaded is a dynongraph on what the C38R does on a 3.7L Honda single cam V6 for comparison. The C38R is a beast in such a small package

TopgunZ · 12-24-2021, 08:13 AM

Quote:

Originally Posted by osmosizzz

Have you looked into grip-tec? I had a buddy run Carbonite and he was going through belts often. I went the griptec route and change belts once every 8-10 months. This is a 6 rib powering the rotrex C38R. Currently it holds 17psi with a wastegate duty set at 45

Love what you've done with the C38R on this platform btw. Uploaded is a dynongraph on what the C38R does on a 3.7L Honda single cam V6 for comparison. The C38R is a beast in such a small package

That's what I wanted to use but they won't process my custom pulleys. They only sell the application on their pre made pulleys. At least that's the story i got from a guy that works there.

12-19-2021, 06:26 AM	#372 (permalink)
TopgunZ A True Z Fanatic Join Date: Jun 2012 Location: Minneapolis Posts: 2,651 Drives: 06 350Z , 09 370Z MT Rep Power: 6835	Redondo really pushed the V3. Even overspinning it on the ACE kit we only get 15psi with a turboguard. If you run that blower at it's max recommend from factory it is around 14.5psi with a turboguard. With a proper filter setup (an actual cone filter) it's 12psi. I can't recall but I think Redondo's oil slinger ate itself apart around 17psi...? I know Soho did a write up where it starts to spit oil out at 18psi. From what I've seen anything over 15psi puts that unit on a yearly rebuild list. Past that the oil slinger cavitates the oil and turns it into a froth not allowing proper cooling since it is self contained. That's when things go bad. (Straight from Vortech). __________________ ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
New Rotrex C38R Supercharger	R3drckt09	Forced Induction	145	02-05-2023 08:37 AM
rotrex c38r spec sheet	tiller	Forced Induction	11	09-13-2018 11:57 AM
Rotrex C38R & are HR/VHR GTM SC mounting brackets the same?	SS_Firehawk	Engine & Drivetrain	6	02-09-2018 10:33 PM
Replacement Rotrex Supercharger for the GTM Stage 1 kit	wind.zero	Forced Induction	29	06-03-2014 06:20 AM
[FOR SALE] Rotrex C38-81 Supercharger Only	pokeyl	Parts for sale (Private Classifieds)	3	02-17-2014 09:07 AM

12-18-2021, 10:47 PM	#371 (permalink)
Birdiev Base Member Join Date: Nov 2020 Location: Texas Posts: 21 Drives: G37 Rep Power: 5	[QUOTE=TopgunZ;4016315]You really need to display the boost graph vs the afrs. Afrs mean nothing here where psi is what we are looking for. Yea your right,I guess you just have to take my word for it .I was trying to show that I was hitting 15 psi at 5200rpm. Thats why the graphs stop there because of the set boost cut.Meaning anyone running that psi or under will be there by 5200 vs the traditional centrifugal SC setup at 7500. Of course hp numbers will vary depending on variables but psi should never change as its belt driven and S/C will spin at set rpm vs engine rpm. Now writing this out , I take it back.Lol.Thinking about it a built engine with say maybe bored,4.2 will have made lower psi at same rpm as it needs more volume to fill the cylinders.

***Topgunz ROTREX C38R Supercharger Kit***

Topgunz ROTREX C38R Supercharger Kit