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Old 09-01-2010, 07:05pm   #1
Garb55
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Default A ZR-1 Killing Grand Sport…With a Warranty



Last month, Howard Tanner from Redline Motorsports and Dan Carlton from DeNooyer Performance invited us to drive their newest tuned-up Corvette: the Redline HTR-GS640/SC.

Unfortunately, the car’s right rear tire picked up a nail en route to the famed MOTSLOPD (pronounced: “Cops? What Cops?”), a.k.a., McNessor’s Official Top Secret Location O’ Photos and Driving.

However, because the ‘Vette rolls on P325/30ZR19 Eagle F1 Supercar run-flat tires, Howard and Dan kept motoring and proceeded to let me and Terry McGean drive the car anyway. A little more about those shenanigans in a moment, but first some background….



The HTR-GS640/SC (Translation: Howard Tanner Redline – Grand Sport 640hp Super Charged) started out as an unsuspecting 2010 Corvette Grand Sport in Cyber Gray Metallic with Red Interior and the 3LT package.

The car was also ordered with a $750 removable roof panel; $395 Competition Gray aluminum wheels; $695 optional two-tone seats, a $1,750 Nav system, and a $410 full-width spoiler, plus custom stripes, applied by DeNooyer, for a grand total of around $64,000.



Then Howard put the GS on a muscle-building program. To the stock 430hp LS3 he added: an Edelbrock E-Force blower; a new cam with more lift and duration than stock but with a wide lobe separation to take advantage of the supercharger’s boost; heavy valve springs; chromemoly pushrods; titanium retainers and heavy-duty keepers; a set of Borla stainless mufflers and an MGW short-throw shifter.

The result is…640hp at the crank and 566hp at the rear wheels.

Howard says he likes the new Edelbrock blower because it packs a bigger low-end punch than the Eaton unit used on the ZR1, yet it looks like something that would’ve been installed at the factory.

“Edelbrock has incorportated 13-14-inch-long runners that extend the length of the intake port. This unit has a lot more throttle response and power down low than the 2300 blower on the ZR1 because that blower is top mounted with no runners,” he said. “What I really like about it is that the fittings are all factory-style connections and, for us to build a car and put a warranty behind it, we need to know that we’ve got a product that’s not going to break.”

As with all of the DeNooyer Performance/Redline beasts, the GS is sold with a 3 year/36,000-mile warranty. They also take trades at their new Central Avenue, Albany, New York- based dealership and will finance any of their machines.

Now a word about the car’s performance. You’re thinking (like I was) yes, the warranty on a tuned-up car is very cool but uh…big deal, it’s a Corvette with a bolt-on supercharger and a cam.

It’s surprising, though, how hard this thing hits from its lopey idle up to as high as you dare spin the engine while driving on a runflat with a nail in it. I haven’t been in a ZR1 (yet) but the CTS-V and the Shelby GT500 seem mild on the low end. I suspect this is by design, to prevent unintentional burnouts and donuts at every traffic light.

The HTR-GS640/SC has gobs of power everywhere in the RPM range and the blower goes about its business without a lot of whining. The Borlas, however, are quick to speak up under heavy throttle. The MGW shifter is also an impressive piece of hardware. Honestly, I hadn’t heard of this stick, but it’s built like the Pentagon spec’ed it and practically snaps itself into the next gear.

Okay, enough yammering already, how much does all of this tomfoolery cost?

At $82,000 the HTR-GS640/SC ain’t cheap but with ZR1-like power and the production Grand Sport’s Z06 chassis pieces, plus the option of a removable top (unavailable in a Z06), it’s a lot of track-day weaponry for the money.






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Old 09-01-2010, 07:40pm   #2
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yo quiero.
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Old 09-01-2010, 08:46pm   #3
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Very cool!
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Old 09-01-2010, 09:03pm   #4
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Old 09-02-2010, 07:13am   #5
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18k is lots of $$ but that is a nice setup and I could use one under our 09
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Old 09-22-2010, 12:21pm   #6
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I want one
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Old 09-22-2010, 04:28pm   #7
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I want one
I need One!
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Old 09-22-2010, 09:32pm   #8
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Like the color.
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Old 10-27-2010, 07:26pm   #9
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Ok very nice and lots of HP, but the 427 of today is not the 427 of the 60's. Two totally different animals and in the 60's they were not LS7 motors.
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Old 10-27-2010, 07:40pm   #10
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Ok very nice and lots of HP, but the 427 of today is not the 427 of the 60's. Two totally different animals and in the 60's they were not LS7 motors.
Neither this featured car (aftermarket supercharged LS3 engine), nor the factory supercharged LS9 ZR1 come with 427 CI engines.

Not quite sure what you're replying to?


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Old 10-27-2010, 08:02pm   #11
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Ok very nice and lots of HP, but the 427 of today is not the 427 of the 60's. Two totally different animals and in the 60's they were not LS7 motors.
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Old 10-28-2010, 09:14am   #12
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Neither this featured car (aftermarket supercharged LS3 engine), nor the factory supercharged LS9 ZR1 come with 427 CI engines.

Not quite sure what you're replying to?


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Originally Posted by Garb55 View Post
In the video the guy refers to people buying this cars think back to the 60's and the 427 than and refers to it as an LS7 back than. I realize that the feature car as well as the ZR1 are not running the 427, but you can order the new GM 427 conversion.
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Old 01-11-2011, 03:03pm   #13
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Quote:
Originally Posted by TR6speed View Post
In the video the guy refers to people buying this cars think back to the 60's and the 427 than and refers to it as an LS7 back than. I realize that the feature car as well as the ZR1 are not running the 427, but you can order the new GM 427 conversion.
Plus he was talking about the 427 in the Camaro. You can see it in the video a couple times.
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Old 01-11-2011, 04:44pm   #14
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Howard and the folks there know their shit! I have seen the results of Howards work for a few years and he is good.

I have been down to the DeNooyer location a couple of times to discus work and they have a good understanding of the vehicles and want we want!
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Old 01-12-2011, 09:30am   #15
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Good friend of mine has a Callaway GS that is pretty damn quick. Plus his is warrantied through GM dealers.
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Old 01-22-2011, 01:53pm   #16
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That car is SWEET !
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Old 01-22-2011, 02:55pm   #17
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That car is SWEET !


But some sweet ones are RED too.

Love that S/C setup.
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Old 01-22-2011, 03:43pm   #18
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But some sweet ones are RED too.

Love that S/C setup.

Oh yes, there are some nice red ones... no doubt !
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Old 02-02-2011, 01:27am   #19
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LS3 on steroids and a warranty to boot, awesome...
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