Supercharger Issues
Thread Starter
Instructor
Joined: Dec 2013
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From: Montana
Supercharger Issues
Spent the week at Barrett Jackson in Scottsdale and talked with a lot of engineers and performance companies re: Superchargers for my new C7. It was explained to me that there are some architecture issues in the current motor that still need to be addressed by GM and not to do anything to the motor until that service is done to avoid warranty issues. The only guys stating they had a working model was Hennessey and their car was I believe Vic Edelbrock's personal car and no production parts were available. LPE seemed real straight forward and said hold off due to the above issues. It's also interesting to note that the Hennessey C7 that ran 200 was also given a big shot of nitrous for that run. Anyone hearing this same information?
Burning Brakes
Joined: Aug 2013
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Spent the week at Barrett Jackson in Scottsdale and talked with a lot of engineers and performance companies re: Superchargers for my new C7. It was explained to me that there are some architecture issues in the current motor that still need to be addressed by GM and not to do anything to the motor until that service is done to avoid warranty issues. The only guys stating they had a working model was Hennessey and their car was I believe Vic Edelbrock's personal car and no production parts were available. LPE seemed real straight forward and said hold off due to the above issues. It's also interesting to note that the Hennessey C7 that ran 200 was also given a big shot of nitrous for that run. Anyone hearing this same information?
Last edited by senah; Jan 22, 2014 at 04:14 PM.
Former Vendor
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From: Callaway Cars - Old Lyme, Connecticut
Burning Brakes
Joined: Sep 2005
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The only architecture issue that I know of is the direct injection fuel pump being too small for forced induction. This problem has been addressed by GM with the new larger Z06 direct injection fuel pump, but the pump and associated parts are not available yet and will probably be expensive.
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Melting Slicks
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lots of C7's already with blowers installed and on the streets....guess the engineers missed the memo 
Drifting
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Remember, GM must produce an engine package that will last through their 5 year, 100,000 mile powertrain warranty, the aftermarket doesn't have such constraints.
Engineering is a very strict discipline, one that not all aftermarket vendors follow.
And yes, bolt a supercharger onto the motor and your powertrain warranty isn't worth the paper it's written on. Don't bother quoting Magnuson-Moss, it's really easy for them to deny it and a hell of a lot harder for you to fight. Most arbitrators will side with the manufacturer when the add on part it a power adder.
Thread Starter
Instructor
Joined: Dec 2013
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From: Montana
Didn't see Callaway in attendance at Barrett Jackson. There is the issue with the fuel pump being driven by the cam and lack of pressure. Some have gone with additional electric fuel pumps to help. Seemed like the real concern was detonation which apparently would not be pretty in those engines.
Team Owner
Joined: Sep 1999
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From: Springfield MO
I'm in the "wait and see" camp on this issue. GM must have felt that there was an issue with the fuel supply, as they designed and built a special larger displacement fuel pump with higher fuel line pressure to handle their Z06's 625 HP(est).
Melting Slicks
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Burning Brakes
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Drifting
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Engineers do not design fuel systems to run even close to 100% capacity.
The Z06 fuel system was design with the idea that it's not running even close to full capacity at WOT, full boost at high rpms. The LT1's fuel limit was not in any way, shape or form given any weight into using a larger capacity fuel system in the Z06. Anybody with a brain would realize that from day 1 of considering both engines, that their fuel system capacity requirements were completely separate and independent from the get-go because of their target outputs.. The Z06 fuel system will probably support near 800whp without modification.
The LT1 fuel system is proven to run without hiccup at 600whp. That's probably right near cold-**** max for the fuel system. If you max the system and run out of fuel, the car should hopefully go into limp mode/fail safe mode when it detects insufficient fuel supply, hopefully before the engine burns up.
No offense, but that is an ignorant assumption.
Last edited by C7pimp; Jan 23, 2014 at 12:48 PM.
Team Owner
Joined: Sep 1999
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From: Springfield MO
That doesn't have ****-all to do with the LT1.
Engineers do not design fuel systems to run even close to 100% capacity.
The Z06 fuel system was design with the idea that it's not running even close to full capacity at WOT, full boost at high rpms. The LT1's fuel limit was not in any way, shape or form given any weight into using a larger capacity fuel system in the Z06. Anybody with a brain would realize that from day 1 of considering both engines, that their fuel system capacity requirements were completely separate and independent from the get-go because of their target outputs.. The Z06 fuel system will probably support near 800whp without modification.
The LT1 fuel system is proven to run without hiccup at 600whp. That's probably right near cold-**** max for the fuel system. If you max the system and run out of fuel, the car should hopefully go into limp mode/fail safe mode when it detects insufficient fuel supply, hopefully before the engine burns up.
No offense, but that is an ignorant assumption.
Engineers do not design fuel systems to run even close to 100% capacity.
The Z06 fuel system was design with the idea that it's not running even close to full capacity at WOT, full boost at high rpms. The LT1's fuel limit was not in any way, shape or form given any weight into using a larger capacity fuel system in the Z06. Anybody with a brain would realize that from day 1 of considering both engines, that their fuel system capacity requirements were completely separate and independent from the get-go because of their target outputs.. The Z06 fuel system will probably support near 800whp without modification.
The LT1 fuel system is proven to run without hiccup at 600whp. That's probably right near cold-**** max for the fuel system. If you max the system and run out of fuel, the car should hopefully go into limp mode/fail safe mode when it detects insufficient fuel supply, hopefully before the engine burns up.
No offense, but that is an ignorant assumption.
Last edited by JoesC5; Jan 23, 2014 at 01:20 PM.
Racer
Joined: Sep 2013
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From: Sarasota Florida
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There are no issues with the motor and fuel system up to about 600hp. This has been proven in the several builds done by LMR, Vengence, ECS, etc. If you want to go above that there will basically be two options. Go with a larger fuel lope cam which LMR, Vengence, etc have done or wait for an aftermarket or Z06 fuel system upgrade. Yes your warranty will be gone with adding an aftermarket supercharger. Some care about that, some don't.
Team Owner
Joined: Sep 1999
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From: Springfield MO
There are no issues with the motor and fuel system up to about 600hp. This has been proven in the several builds done by LMR, Vengence, ECS, etc. If you want to go above that there will basically be two options. Go with a larger fuel lope cam which LMR, Vengence, etc have done or wait for an aftermarket or Z06 fuel system upgrade. Yes your warranty will be gone with adding an aftermarket supercharger. Some care about that, some don't.
Wonder why the dumbass GM engineers changed the crankshaft, rods and pistons in the LT4? Maybe just to run up the cost of the Z06 as they apparently have no need to be in the LT4 since an aftermarket supercharged LT1 doesn't need them. LOL
Last edited by JoesC5; Jan 23, 2014 at 01:59 PM.