HOOKER BLACKHEART CRUSH PIPE DELETE KIT - Page 3

SuperSnake1972 · 11-06-2023, 09:42 AM

Just not a big fan of back pressure and restrictive flow. How come they don't make a kit for the automatic ?

KingLT1 · 11-06-2023, 10:04 AM

To answer your question, likely because of the AFM valves interferes and would have to added into the kit which would probably double the cost. Don't know for certain just speculation based on what I seen when I tried to use them. I ended up sending them back and changing the entire X pipe.

Either way, It's a waste of time, effort, and money until your are making A LOT more power than stock.

MyNameIs · 11-06-2023, 10:06 PM

Already been tested multiple times, the crushed pipe has absolutely no effect of hurting performance.

oldman · 11-07-2023, 02:55 PM

I agree but to a point, as some point in the build even NA, it will cause a restriction, sure it is at the rear where exhaust gasses have lost lots of their energy. My guess on a health NA engine with LT, heads, cam 3 to 10 HP. Stock almost zero, on a health FI build I can see upto 12 HP but we are talking engines reaching 900+ HP. Now if you ask me is there any power going from 2 and 3/4 stock size to 3" dunno about that one, even on 3/4 FI builds...

wenlyone · 11-05-2024, 08:49 PM

Was the car retuned and then dyno’ed to see if it really makes no difference? Disturbing the flow with a smaller cross section will affect flow velocity.

lt4camaro · 11-09-2024, 03:00 PM

Quote:

Originally Posted by BigEnos

Mishimoto did a very well controlled back-to-back of the "crushed" pipes vs. a round mandrel bent pipe and showed zero difference between the two. It's in this thread:
http://www.camaro6.com/forums/showth...exhaust&page=4

Note that they did this essentially as an FYI. They have no dog in the fight, but were probably just curious like the rest of us.

Facts:
Oval pipes flow just as well as round.
Factory oval pipe sections do not hurt performance.
Likely helps ground clearance.

If it just bothers you, then fine, change it. Know that you are only changing them and spending money, time, and effort for your own OCD tendencies.

You asked for opinions and I have one, though. Good luck.

But the crushed Zone is not oval, its crushed and does disrupt flow and sound

11-06-2023, 09:42 AM	#29
SuperSnake1972 Drives: 2020 chevrolet camaro 2SS Join Date: Feb 2023 Location: arizona Posts: 96 View My Garage	Crushed Just not a big fan of back pressure and restrictive flow. How come they don't make a kit for the automatic ?

11-06-2023, 10:04 AM	#30
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 7,665	To answer your question, likely because of the AFM valves interferes and would have to added into the kit which would probably double the cost. Don't know for certain just speculation based on what I seen when I tried to use them. I ended up sending them back and changing the entire X pipe. Either way, It's a waste of time, effort, and money until your are making A LOT more power than stock. __________________ 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel

11-07-2023, 02:55 PM	#32
oldman Drives: SS 6 speed of course Join Date: Jan 2016 Location: Hilo, HI Posts: 4,346	I agree but to a point, as some point in the build even NA, it will cause a restriction, sure it is at the rear where exhaust gasses have lost lots of their energy. My guess on a health NA engine with LT, heads, cam 3 to 10 HP. Stock almost zero, on a health FI build I can see upto 12 HP but we are talking engines reaching 900+ HP. Now if you ask me is there any power going from 2 and 3/4 stock size to 3" dunno about that one, even on 3/4 FI builds... __________________ Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.

11-06-2023, 10:06 PM	#31
MyNameIs Banned Drives: Camaro SS Join Date: Aug 2023 Location: Middle Park East, Liberty City Posts: 331	Already been tested multiple times, the crushed pipe has absolutely no effect of hurting performance.

11-05-2024, 08:49 PM	#33
wenlyone Drives: Chevy camaro Join Date: Jun 2023 Location: Chatham nj Posts: 13	Was the car retuned and then dyno’ed to see if it really makes no difference? Disturbing the flow with a smaller cross section will affect flow velocity.

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