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  #13  
Old 03-14-2016, 10:16 PM
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Re: 5.7 hemi Corsa redesign

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Originally Posted by cdgatx View Post
I'm curious as to how much horsepower and torque this will add to 5.7 hemi.
I know you asked him but I'll chime in on my butt dyno experience. I appeared to have lost .3 ish sec off my 0-60 times but she was more responsive in all rolling go's in the mid-range. John at Corsa said, yep, expected. He said the higher flow robs from launch but gives it back in mid which makes sense if all you do is have higher outflow but no tune or headers. A cat-back, IMHO, is not about power increase just "grin" increase!

Forgot to mention I always had the Volant CAI on the truck.

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  #14  
Old 03-14-2016, 10:35 PM
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Re: 5.7 hemi Corsa redesign

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Originally Posted by GoPlzGo View Post
I know you asked him but I'll chime in on my butt dyno experience. I appeared to have lost .3 ish sec off my 0-60 times but she was more responsive in all rolling go's in the mid-range. John at Corsa said, yep, expected. He said the higher flow robs from launch but gives it back in mid which makes sense if all you do is have higher outflow but no tune or headers. A cat-back, IMHO, is not about power increase just "grin" increase!



Forgot to mention I always had the Volant CAI on the truck.

Corsa no longer makes intake for our Jeep after they bought Volant. Local shop that does performance work said they had problems with American racing headers. Kooks wouldn't help. Stainless works said to call R&D that would entail leaving my Jeep with them for 4 weeks. I can't do it right now.


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  #15  
Old 03-14-2016, 10:36 PM
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Re: 5.7 hemi Corsa redesign

Why I'm doing Corsa exhaust system soon.


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  #16  
Old 03-14-2016, 10:45 PM
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Re: 5.7 hemi Corsa redesign

Quote:
Originally Posted by cdgatx View Post
Corsa no longer makes intake for our Jeep after they bought Volant. Local shop that does performance work said they had problems with American racing headers. Kooks wouldn't help. Stainless works said to call R&D that would entail leaving my Jeep with them for 4 weeks. I can't do it right now.


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Yeah, they sold me the Volant as they had just bought them. Fo sure headers are a beotch on a JGC Hemi. Too back Stainless doesn't have cool loaners like Corsa does. Here's my lab riding co-pilot in the 6spd C6 Corsa 'Vette they gave me for the month they had my truck.

FWIW, Corsa will FOR FREE install, tweak and/or swap back to stock lifetime for anyone who comes to them in Berea (Cleveland, OH). You can buy from them or buy elsewhere and bring in but you will need legit receipt. They will verify seller is an authorized dealer.
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  #17  
Old 03-14-2016, 10:59 PM
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Re: 5.7 hemi Corsa redesign

Local shop will install and I've used him a lot he does excellent work. Shouldn't have any issues with leaks.


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  #18  
Old 03-15-2016, 03:44 AM
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Re: 5.7 hemi Corsa redesign

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Originally Posted by peteyturbo View Post
I have reached out to them to offer dyno testing for this new system. I will keep you guys updated if anything comes of it.
That was mighty nice of you, would be helpful to see independent dyno testing from another source.

Thanks again
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Old 03-15-2016, 03:59 AM
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Re: 5.7 hemi Corsa redesign

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Originally Posted by GoPlzGo View Post
The main theme for the redsign besides more consistent fitment in the field was to redo the sound profile. They wanted it to still say “I’m not stock” at startup and idle, be mellow for cruise and DD use and be more aggressive WOT. They hit the mark perfectly IMHO.
First of all, its kind of cool to work with manufacturers of aftermarket automotive equipment. Having done it on numerous occasions, I'm fully aware of the pros and cons and appreciate you taking the time to get a kit into production.

Seeing that this is my first GC that I decided to modify, your videos was the main reason I decided to look into the Corsa performance product, so thanks for putting them together.

Thanks
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Old 03-15-2016, 04:22 AM
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Re: 5.7 hemi Corsa redesign

Quote:
Originally Posted by GoPlzGo View Post
I appeared to have lost .3 ish sec off my 0-60 times but she was more responsive in all rolling go's in the mid-range. John at Corsa said, yep, expected. He said the higher flow robs from launch but gives it back in mid which makes sense if all you do is have higher outflow but no tune or headers. A cat-back, IMHO, is not about power increase just "grin" increase!
Sounds reasonable at low flow conditions, the less restrictive cat-back exhaust system is causing the velocity of the exhaust pulses to slow down in the 0-60 range. And at higher flow conditions where the stk. cat-back is restrictive with it's crushed tubing and non-mandrel bends, the less restrictive mandrel bent pipes on all aftermarket exhaust systems will pickup a little bit of power. So I agree, the addition of a good cat-back system is more about that aggressive exhaust sound, looks and longevity.

Thanks
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  #21  
Old 03-15-2016, 04:59 AM
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Re: 5.7 hemi Corsa redesign

^^^^and to add to Mr. Plummer's info....

Many ask, "Will this modification void my warranty?"

Actually, yes, it does!

Your OEM factory warranty, on the stock exhaust, is voided entirely!

Thing is, the OEM factory exhaust warranty is zip, zero, nada!

And, your new 100% stainless "modified" exhaust has a Limited Lifetime warranty, from Corsa!
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Old 03-15-2016, 12:38 PM
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Re: 5.7 hemi Corsa redesign

Im am highly doubtful that any exhaust, even complete removal of cat back exhaust system would cause a .3 loss from 0-60..i would look into testing scenerios or equipment used to obtain data as possible culprits..
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  #23  
Old 03-15-2016, 01:06 PM
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Re: 5.7 hemi Corsa redesign

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Originally Posted by peteyturbo View Post
Im am highly doubtful that any exhaust, even complete removal of cat back exhaust system would cause a .3 loss from 0-60..i would look into testing scenerios or equipment used to obtain data as possible culprits..
I hear ya but I did say "butt dyno" and "ish". Since a real dyno or track timer were not involved (just my iPhone timer ) I ran 10 runs stock on a 35 deg dry winter air day and then 10 with just cat-back (CAI not on) on the next day (40 deg dry winter air). Same dry road and sport mode with power brake launch. It was pretty consistent that the OEM exhaust was slightly faster 0-60 and the cat-back had more torque (butt dyno ) with mid-range rolling to WOT runs. Didn't get much heat soak falloff given the cool days.

My real point was making sure the poster was not wanting to just add a cat-back to increase hp/torque. Primary reason for adding a cat-back only should be for the sound unless part of a concerted power add effort.

Keep in mind the Corsa engineer, who gets challenged all the time about power increase claims, agreed the cat-back on the JGC 5.7l Hemi robs some small power from low-end.

Would love to see real dyno numbers from you tho to take this discussion into the real fact world.
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Old 03-15-2016, 01:17 PM
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Re: 5.7 hemi Corsa redesign

Quote:
Originally Posted by GoPlzGo View Post
I hear ya but I did say "butt dyno" and "ish". Since a real dyno or track timer were not involved (just my iPhone timer ) I ran 10 runs stock on a 35 deg dry winter air day and then 10 with just cat-back (CAI not on) on the next day (40 deg dry winter air). Same dry road and sport mode with power brake launch. It was pretty consistent that the OEM exhaust was slightly faster 0-60 and the cat-back had more torque (butt dyno ) with mid-range rolling to WOT runs. Didn't get much heat soak falloff given the cool days.

My real point was making sure the poster was not wanting to just add a cat-back to increase hp/torque. Primary reason for adding a cat-back only should be for the sound unless part of a concerted power add effort.

Keep in mind the Corsa engineer, who gets challenged all the time about power increase claims, agreed the cat-back on the JGC 5.7l Hemi robs some small power from low-end.

Would love to see real dyno numbers from to take this discussion into the real fact world
Well if they can give me a break on a system (online retailers were cheaper then any of our multiple wholesale distributors) i can not only provide accurate same day dyno power comparisons, i can also simulate 1/4 mile performance including 0-60 times using our race mode on our mustang awd dynomometer.
It wouldbe my guess that no low end power of measurable amount would be lost and should pick up a few hp from 3000rpm on up..
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