Cargraphic Valve Control Unit
03-02-2023, 05:04 PM
#106
Rennlist Member
I'm assuming they'll get to you west coast guys first. So whoever installs it, please post many many pics of the procedure. Thanks. We would've done the same on the east coast.
03-02-2023, 05:07 PM
#107
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SupremePOWER Inc
1562 Kimberly Ave - Fullerton CA 92831
Contact: sales@supremepower.com - Shop# (714)632-1951
World's Largest Retailer/Distributor of BBS Motorsport & Street Wheels from 2015-2023
Huge Inventory: BBS, Kline, Brembo, Soul, Recaro, KW, Akrapovic & 200+ brands. Installation available
** Retail & Wholesale ** Global Delivery ** We match/beat any authorized dealer's price **
SupremePower.com // SupremeForged.com // Follow SupremePower on IG
Last edited by SupremePower; 03-02-2023 at 05:35 PM.
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03-04-2023, 08:53 PM
#108
Forcing the valves fully open 100% at all times you will reduce power on a turbo car.
I had a Renntech valve module for my Mercedes, AMG E63. We Dyno tested it with the fully open valves forced by a module and then removed it and Dino’s with it stock valve function. More torque stock, better turbo operation and pressures that the ECU can properly maintain.
- if you want power and mild sound bump on a 992, add sport cats, and then you’re forced to tune it.
- if you want much more sound, grab an expensive valved aftermarket exhaust or go no valve with SharkWerks (no tunes needed for most cat-back exhaust only options)
I had a Renntech valve module for my Mercedes, AMG E63. We Dyno tested it with the fully open valves forced by a module and then removed it and Dino’s with it stock valve function. More torque stock, better turbo operation and pressures that the ECU can properly maintain.
- if you want power and mild sound bump on a 992, add sport cats, and then you’re forced to tune it.
- if you want much more sound, grab an expensive valved aftermarket exhaust or go no valve with SharkWerks (no tunes needed for most cat-back exhaust only options)
03-04-2023, 11:43 PM
#109
This is hard to believe. How much power did you lose? And what’s the logic in losing power with less back pressure? I understand if you went catless and potentially had boost spike (and thus reducing power or throttle flaps closed) due to much less back pressure but with sport or stock cats I would think this would be fine.
you would notice that pressure builds in the hose, and a larger quantity of water would shoot out of the hole you drilled. The back pressure is acting on materials it is in contact with. Replace the hole with a turbo, the end of the hose with an exhaust valve..I’m not advocating this is proper, just explaining how I understand the argument
Last edited by 22992; 03-04-2023 at 11:50 PM.
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ddelallata (03-05-2023)
03-05-2023, 10:45 AM
#110
I’m going to try to explain the logic without getting into the debate about weather or not the logic is sound…picture a garden hose, a small hole drilled in the top and no nozzle on the end. When you turn the water on, what would happen? Well, you would get most of water coming out the end of the hose and Merely a dribble out of the hole you drilled in the top. Why? Path of least resistance. Now, put your hand over the end of the hose, and
you would notice that pressure builds in the hose, and a larger quantity of water would shoot out of the hole you drilled. The back pressure is acting on materials it is in contact with. Replace the hole with a turbo, the end of the hose with an exhaust valve..I’m not advocating this is proper, just explaining how I understand the argument
you would notice that pressure builds in the hose, and a larger quantity of water would shoot out of the hole you drilled. The back pressure is acting on materials it is in contact with. Replace the hole with a turbo, the end of the hose with an exhaust valve..I’m not advocating this is proper, just explaining how I understand the argument
Way too much flow on a turbocharged car will sometimes cause boost spike and in some cars will shut the throttle valve or immediately reduce boost pressure below set point (thus losing power) to prevent leaning out the motor and blowing it up. But with stock cats or even 200 cell cats and just exhaust valve opened, I don’t see how this would cause too much flow to the point of boost spike.
Last edited by Purekoryo; 03-05-2023 at 10:46 AM.
03-05-2023, 10:49 AM
#111
I understand the physics of back pressure but the logic I’m trying to understand is how you would lose hp when you free up the flow.
Way too much flow on a turbocharged car will sometimes cause boost spike and in some cars will shut the throttle valve or immediately reduce boost pressure below set point (thus losing power) to prevent leaning out the motor and blowing it up. But with stock cats or even 200 cell cats and just exhaust valve opened, I don’t see how this would cause too much flow to the point of boost spike.
Way too much flow on a turbocharged car will sometimes cause boost spike and in some cars will shut the throttle valve or immediately reduce boost pressure below set point (thus losing power) to prevent leaning out the motor and blowing it up. But with stock cats or even 200 cell cats and just exhaust valve opened, I don’t see how this would cause too much flow to the point of boost spike.
03-05-2023, 10:50 AM
#112
I understand the physics of back pressure but the logic I’m trying to understand is how you would lose hp when you free up the flow.
Way too much flow on a turbocharged car will sometimes cause boost spike and in some cars will shut the throttle valve or immediately reduce boost pressure below set point (thus losing power) to prevent leaning out the motor and blowing it up. But with stock cats or even 200 cell cats and just exhaust valve opened, I don’t see how this would cause too much flow to the point of boost spike.
Way too much flow on a turbocharged car will sometimes cause boost spike and in some cars will shut the throttle valve or immediately reduce boost pressure below set point (thus losing power) to prevent leaning out the motor and blowing it up. But with stock cats or even 200 cell cats and just exhaust valve opened, I don’t see how this would cause too much flow to the point of boost spike.
03-05-2023, 11:54 AM
#113
They are saying with less pressure the turbo would spool up slower. As the exhaust valves close and create a Venturi effect, the same volume of gasses exiting a smaller area results in faster flow at a higher pressure, spooling the turbo faster and flowing exhaust gasses away from the cylinders quicker than a no restriction system
I think I may have answered my own question. Going to buy one of these bad boys and see for myself!
03-05-2023, 04:27 PM
#114
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22992 (03-09-2023)
03-09-2023, 07:05 PM
#116
Instructor
Rennlist should be renamed EnablerList... I bought that damn JCR exhaust group buy to match this group buy... summer time will be loud.
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03-09-2023, 09:13 PM
#117
Rennlist Member
03-10-2023, 03:52 PM
#119
Rennlist Member
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TimD (06-12-2023)
