Drag Racing

[NormV]

A Boat Motor!!!

http://www.gm.com/explore/technology...LSA_Marine.pdf

9.1:1 Marine spec compared to 9.0:1 for the auto?

Those numbers are not SAE J1349 yet, are they? Probably J-607 with a less stringent MEFI-5 engine controller meeting all emission for OBD-M.

So we go from LS6 being the snizzle, to "LS2 truck motor" to "LSA Boat Motor"?

6.52 gms/sec injectors are maxed out already?!

MRC shocks I expected better 60' times. We'll see.

Your not over promising are you?

Norm

[StealthV]

Marine > truck any day for the chick factor alone. Thought everyone knew that.

[V-Smooth]

Can you smell what he General is cookin'? It sure smells good! Low 11s - high 10s with slicks, pulley (if possible), a good tune via Stealth, + headers/cat back (think the stock system will flow pretty good though). 600hp doesnt seem out of the question. The glory of it all...4-doors that will turn (thx MRC) and stop better (thx brem) than almost anything = benchmark...truly a 4-door vette? Hmm?

What really pisses me off is that I probably cannot afford V2...just bought a house. I'll have to justify it somehow cuz this V is a bargain. Anxious for MSRP info....

[HiTechRV]

Originally Posted by StealthV

The spare tire from a '08+ CTS may work on the front of V2 if it'll clear the caliper. The tire is a T135/70R18.

And another little goodie from the '08 CTS - It's the same 5x120-mm bolt pattern as BMW, F-body and Corvette wheels. Will V2 be the same? My guess is yes.

Looks like an easy weight reduction. Good news if the wheels are a standard lug pattern.

[Katshot]

Those little wheels on the front won't even give you a noticeable improvement in E/T. Certainly not verifiable IMO. If past LSx power gains are any clue, I think the biggest gains in power will most likely come via a more aggressive bump stick and tune but it could compromise the streetability of the car due to a reduction in bottom and mid-range power. Would it be enough to truly matter, seeing as how the engine has much power to spare? Possibly not. As I said before, it'll be very interesting to see some dyno data from tuners.

[HiTechRV]

100 lbs static weight loss can be good for a tenth. Runflats are very very heavy, though maybe this V does not use them? Reduction in unsprung rotating mass helps acceleration even more than the pure static weight loss.

[Katshot]

I doubt you'd realize a 100# reduction by swapping the wheels but even if you did, I'm not buying that it would net a tenth lower ET.

[NormV]

Originally Posted by Katshot

I doubt you'd realize a 100# reduction by swapping the wheels but even if you did, I'm not buying that it would net a tenth lower ET.

The theory holds, its just where on the wheel. If is on the hub as this where the wheel mounts I agree it will never happen. Loosing weight on the outside of the wheel like a figure skater changing arm position while spinning would be a better example. But a normal tire weighs just over 25 lbs. so loosing 25 per corner would be like loosing the whole tire. Besides your only driving one wheel for V2. Not unless you went with a non-DOT(no belts) drag radial.

What do you want to sacrifice? You going to be trailering your V2 to the track?

Norm

[HiTechRV]

Sorry did not mean to imply it would be 100 lbs weight reduction. Just saying that a general rule at the strip is loosing about 100 lbs gains you about a tenth on average. The little emergency spares are much lighter and in fact a smaller diamter than the stock wheels. There is no doubt in my mind they will accelerate much more easily. I rolled a wheel with the runcraps from my old V into the tire shop and they are REALLY heavy. The steel reinforced sidewalls are 6x heavier than a normal tire, and the weight is all toward the outside of the assembly. The force required to get them rolling is significant compared to the almost effortless way you can get a service spare rolling.

[HiTechRV]

So back to the topic, I'm wondering if line locks woud be beneficial. I suspect there's nothing V specific about getting some in. Is a drag racing tune any different than a nomal performance street tune - may be some things to play with in the launch contol portion of the automatic. How about drag shocks? The Magride simulates them already but maybe it can be tuned for quicker weight transfer to the rear? Different clutch? Lighter rear racing wheels? You can get a lot of drag radials in DOT approved form, but I'm thinking real slicks might be needed to get a really good 60' time.

[StealthV]

Want a truly fast drag racing V? Remove everything that doesn't make the car launch, go in a straight line or stop - 600-800 lbs worth of "luxury."

Like V1, don't expect V2 to be a drag strip king - They were both refined on the 'Ring.

[HiTechRV]

I'm expecting it do get into the 11's at the strip within months of being out, and 10's within a couple of years. It's not gonna be an 8 second car though.

[V-Smooth]

If there's a will there's a way.

[V-Smooth]

C6Z for instance has some carbon fiber parts, pipedream here, why not explore carbon fiber parts for V2? Doors/hood/trunk. Dont know how many pounds you could shave but, yeah, cost is an issue. Mallett V2 should be tasty.

[Katshot]

Originally Posted by StealthV

Want a truly fast drag racing V? Remove everything that doesn't make the car launch, go in a straight line or stop - 600-800 lbs worth of "luxury."

Like V1, don't expect V2 to be a drag strip king - They were both refined on the 'Ring.

Agreed.