and I used NGK TR6 with my Vortech however Edlebrock E-Force recommend that you stay with the stock spark plug (Not sure why)
Spark plugs recommendation
Thread Starter
Intermediate
Joined: Jul 2007
Posts: 29
Likes: 0
From: The Woodlands Texas
Spark plugs recommendation
I installed a Maggie TVS 2300 on my C6 LS2 .. It runs great however, I seem to be burning way to much gas ...I had it tuned and it still seems to burn more gas a simular set-up's ... Can my spark plugs, which are stock, be a problems?
Melting Slicks
Joined: Sep 2004
Posts: 3,287
Likes: 1
From: Union City CA
Thread Starter
Intermediate
Joined: Jul 2007
Posts: 29
Likes: 0
From: The Woodlands Texas
On a normal cruise run ... I used to get 22-24 pushing it a times ... Now ... not even playing I get 18-21 if I'm lucky .... I'm running wider tires all around .. 285 front and 345 rear. I know the drag of the tire have some effect. Even thou it was turned at England Green and corrected for fuel/air mixture, at times the cars behind me can smell the fumes. I cam also smell it when stopped. There are no leaks!!!
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,820
From: Charlotte, NC (formerly Endicott, NY)
On a normal cruise run ... I used to get 22-24 pushing it a times ... Now ... not even playing I get 18-21 if I'm lucky .... I'm running wider tires all around .. 285 front and 345 rear. I know the drag of the tire have some effect. Even thou it was turned at England Green and corrected for fuel/air mixture, at times the cars behind me can smell the fumes. I cam also smell it when stopped. There are no leaks!!!
The tires can have quite a bit to do with the gas consumption. Even with the same size tires. For example, with my C5Z I had a set of stock wheels with stock S/C tires on them and also a set of stock wheels with Firestone Wide Ovals on them. When I had the WOs on the car it would get 2 miles to the gallon less fuel mileage every time. I saw this multiple times and the change was always the same. The Firestones were softer tires and had more rolling resistance.
Bill
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Drifting
Joined: Apr 2008
Posts: 1,955
Likes: 22
From: Lehigh Valley Pennsylvania
From experience ditch the Irridiums, we have had all kinds of tuning issues on several cars with F/I. That thin electrode gets extremely hot and causes detonation, plus the heat range of the plug is incorrect for boost. The most common plug for boost on stock compression is NGK TR6 gapped at .035. They are copper, I change mine out ever 10-15K.
Racer
Joined: Aug 2010
Posts: 327
Likes: 0
From: Texarkana AR
He's right. Up to 10lbs id say tr6 are fine. But anymore than that I would run the colder 7 plug. Its also gapped tighter and eliminates spark blowout under high boost
Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
Friend who installed a Maggie, mild cam, long tubes and a conservative tune(for 91 octane) gets 20-22 MPG when on the highway with his 2010 GS coupe/manual trans. That's cruising, not hot rodding. That's hand calculated as you can't go by the DIC as the injectors were changed for larger ones. Seems most GS owners on this forum report that they only get around 24-25 MPG with their stock Grand Sports, he lost around 4 MPG with his MODs.
Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
The tires can have quite a bit to do with the gas consumption. Even with the same size tires. For example, with my C5Z I had a set of stock wheels with stock S/C tires on them and also a set of stock wheels with Firestone Wide Ovals on them. When I had the WOs on the car it would get 2 miles to the gallon less fuel mileage every time. I saw this multiple times and the change was always the same. The Firestones were softer tires and had more rolling resistance.
Bill
Bill
Tire alignment also affects gas mileage. Toe being off can cause a lot of tire scrubbing.
Last edited by JoesC5; Mar 30, 2011 at 12:55 PM.
Safety Car
Joined: Jun 1999
Posts: 3,570
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From: Austin, Singapore, Kuala Lumpur, Houston, Dallas, Hong Kong, Elgin, etc.. Texas
On a normal cruise run ... I used to get 22-24 pushing it a times ... Now ... not even playing I get 18-21 if I'm lucky .... I'm running wider tires all around .. 285 front and 345 rear. I know the drag of the tire have some effect. Even thou it was turned at England Green and corrected for fuel/air mixture, at times the cars behind me can smell the fumes. I cam also smell it when stopped. There are no leaks!!!
Le Mans Master
Joined: Jan 2009
Posts: 5,656
Likes: 112
From: ocean springs mississippi
On a normal cruise run ... I used to get 22-24 pushing it a times ... Now ... not even playing I get 18-21 if I'm lucky .... I'm running wider tires all around .. 285 front and 345 rear. I know the drag of the tire have some effect. Even thou it was turned at England Green and corrected for fuel/air mixture, at times the cars behind me can smell the fumes. I cam also smell it when stopped. There are no leaks!!!
