Topgunz ROTREX C38R Supercharger Kit

Birdiev · 12-18-2021, 05:55 PM

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

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, 08:43 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??

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.

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12-18-2021, 05:55 PM	#1 (permalink)
Birdiev Base Member Join Date: Nov 2020 Location: Texas Posts: 21 Drives: G37 Rep Power: 5	Forgot to mention that he was still getting the afr on point that way the graphs very a bit

12-18-2021, 10:47 PM	#9 (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