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drop the weight and remove side mufflers. Car sounds awesome with stock center rear...you basically keep most all the stock exhaust and just open up the sound thus not really affecting and HP or TQ loss or gain.
I am looking to reduce the weight, be nice to add a bit of hp and not have it extremely loud, what is the best combination?
I am thinking, to remove the side mufflers and keep the titanium centre muffler. The problem is said to be, the centre muffler will eventually collapse, causing damage to the surrounding area. There is a backing plate that supports the weak area of the centre muffler.
has anyone used the backing plate? Does it actually work?
I'm talking about the valved side deletes (if you were responding to me).
Too many different sections/combinations going on. I'd like to see a graph for each piece of the system and not 2 or 3 different ones combined because I know a bunch of people who are interested in either just center bypass or just valved side delete. But not both (race pipe).
I was just indicating that such info existed for another of their products. I know there's several threads about them but figured a lot of people read them all.
After weeks/months of hounding JCR i FINALLY got a dyno graph for the silenced race pipe. To his word it does produce 10-15 more hp with very little loss on the low end. If I can find time I'll upload it.
Can you please post it? Don't know why JCR themselves don't share these.
After weeks/months of hounding JCR i FINALLY got a dyno graph for the silenced race pipe. To his word it does produce 10-15 more hp with very little loss on the low end. If I can find time I'll upload it.
I have some acceleration (VBox) data, on a local closed service road, typical Florida humidity and high temperatures: Akrapovic headers + Stock Center, Akrapovic headers + Silenced JCR Race Pipes, and more recently stock headers and JCR Silenced Race Pipes. All of the non-stock combinations made power, I built a few tables to compare, below is one of the many tables. I have even more data from the 991.1 GT3 RS, but I ran maybe a dozen of exhausts in that car, and didn't keep notes of acceleration vs. what modifications were in the car. I only installed systems in the 991.1 GT3RS that by design were going to help to produce power, and I didn't tune my 991.1 or 991.2 GT3RS (because of fragile engine and 991 GT3 engine-gate).
As a reference, R&T tested a 991.1 Turbo S (560Hp) on this range at 4.2s, and C&D tested the 991.2 Turbo S at 3.6s (the 991.2 Turbo S is a 605hp car, not a 580hp car), and supposedly the King of all 911s (the 991.2 GT2 RS) can do this in 3 seconds flat.
The numbers shown for the 991.1 Turbo S are from my car, quick times are with the 100+ octane tune and all the other parts (around 660hp), slowest times in what I run for street driving (mild-tune and 93oct fuel, around 590hp). This table shows how strong both 991.1 and 991.2 GT3 RS are, as acceleration from 60mph is not affected by off-the-line traction advantage on AWD vs. RWD.
I prefer to use real world acceleration, than dyno charts, as dyno charts don't factor aero, cooling, intake air speed, etc.
I have some acceleration (VBox) data, on a local closed service road, typical Florida humidity and high temperatures: Akrapovic headers + Stock Center, Akrapovic headers + Silenced JCR Race Pipes, and more recently stock headers and JCR Silenced Race Pipes. All of the non-stock combinations made power, I built a few tables to compare, below is one of the many tables. I have even more data from the 991.1 GT3 RS, but I ran maybe a dozen of exhausts in that car, and didn't keep notes of acceleration vs. what modifications were in the car. I only installed systems in the 991.1 GT3RS that by design were going to help to produce power, and I didn't tune my 991.1 or 991.2 GT3RS (because of fragile engine and 991 GT3 engine-gate).
As a reference, R&T tested a 991.1 Turbo S (560Hp) on this range at 4.2s, and C&D tested the 991.2 Turbo S at 3.6s (the 991.2 Turbo S is a 605hp car, not a 580hp car), and supposedly the King of all 911s (the 991.2 GT2 RS) can do this in 3 seconds flat.
The numbers shown for the 991.1 Turbo S are from my car, quick times are with the 100+ octane tune and all the other parts (around 660hp), slowest times in what I run for street driving (mild-tune and 93oct fuel, around 590hp). This table shows how strong both 991.1 and 991.2 GT3 RS are, as acceleration from 60mph is not affected by off-the-line traction advantage on AWD vs. RWD.
I prefer to use real world acceleration, than dyno charts, as dyno charts don't factor aero, cooling, intake air speed, etc.
Am I reading this right? Car got slower after mods.
A/S, hopefully the dyno curve and accel data are in agreement in a perfect world. And just to be clear this is a .2 3RS with stock headers and exhaust compared to one with the silenced race pipe.
04-24-2019, 12:10 AM
