cerino2000

Where did you hear this at? Many were saying a few months ago that the 6-spd auto was actually slower than the 4-spd auto w/315's by like 2 tenths which would make it slower than the 6-spd manual.

shopdog

The hook graphs at GM Powertrain's website disagree. They show the A6 as 2% slower 0-60 and in the 1/4 than the A4 with 3.15 rear gearing. OTOH, gas mileage improves 2% with the A6 and its 2.56 rear gearing. Since CAFE is a federal mandate while acceleration and driving fun aren't, we can clearly see why GM is putting in the A6. It isn't to make the car quicker, it is to appease the feds so they can make more Z06s without getting hit with the gas guzzler tax surcharge for Corvettes.

WS6JJP

here is a pic of my quickest run when it was STOCK (except for Corsa catback) I *doubt* that you could get that kind of 60 ft time (with stock tires) with an auto because you only have so much control of launch RPM.....i dunno, maybe you could but i know i was launching at a decent RPM and riding the clutch. Also note that the trap speed was slightly down too because of a headwind that day

no disrespect to the Auto guys, my last C5 was an auto and i loved it(after i installed the TransGo shift kit).....i just like the 6 spd better

patrickboyle

On the street & in the 1/4 A4 wins most of the time. Been there done that..race track proves it.

Vette_DD

GM will build more automatic C6s than 6-spds for some reason. Figures don't lie. It's quite possible that they just built more 6-spds early than they did autos. Wait and see what the total numbers are for the year in a couple of more months after 2005s are no longer made.

WS6JJP

how do you figure that??? show me one timeslip thats better than the one i showed. Not to mention the A4's arent exactly "rockets" off the line. If you cant at least keep up with an auto when driving a 6 spd on the street you probably dont know how to drive a stick too well, or at least to its full, or close to its full potential. Mathematically, or any other way for that matter, theres no denying that a "better" gear ratio (or more of them i.e. 6 spd vs. 4 spd.) is going to help out acceleration, especially at our power level.....meaning that once you go too far you have to take wheel spin into account.

TommyV

That graph was for the A6 in the Caddy. Assuming that the C6 will get the same gearing,(it may not) 2% slower means less than one tenth of a second, i.e. if the A4 does a 4.5 0-60, the A6 would do a 4.59. I'm not worried about it.

LS WON

With the automatic you can get away with more as far as seat positions because you are only using one foot not two ...

CV62

Also more convienient for drivers missing a right arm and one leg!

LS WON

Especially for those that have physical disabilities or bad backs.

ricatthebeach

That's correct

SHOOTER 49

I would agree that nobody will show a a better timeslip with an a4---the best we have in stock form is 12.7. However I would be curious as to what some of your other times were. The a4 is slow out of the hole but it comes out consistently without wheelspin and then accelerates rapidly and consistently thus providing 12.7's all day. It does seem that the mn6 because of wheelspin and driver ability is capable of a 12.4 as your run proves and then equally capable of 13.0's or worse in the hands of drivers who aren't as skilled or who encounter launch problems.

No sane person could agrue that the a4 is quicker the the mn6 but the driver of the mn6 must be PERFECT to beat the a4. What were the worst times you mn6 guys had while experimenting ?

I would suspect that the a4 will more than win its fair share because of it's consistency and the fact that the mn6 truely requires driver's fineese.

shopdog

You only have to look at the higher classes in drag racing to see that the auto is the preferred transmission. No one who wins consistently in Super Stock, Pro Stock, Top Fuel, or Funny Car runs a manual transmission. They all use some form of automatic or manumatic. In the higher classes, they often run a two speed auto too. Every shift costs you time.

Of course these guys use modified automatics. They run high stall converters and shift kits. Everyone wants to talk about engine mods, but a properly setup transmission is key to winning drag races.

jschindler

When I first started reading this, I was going to "jump on you". But then you did clarify that you are talking about highly modified transmissions and purpose built cars.

I agree that an automatic is going to be more consistent, and will beat many six speed cars in the hands of mediocre drivers (especially from a dead stop). But a six speed car is faster than an A4 car - that is a fact.

WS6JJP

you're right shooter 49, the A4 will be more consistant than the 6 spd. I was just basically saying that the quickest times will be from the 6 spd but like you were saying you probably wont get those times every run. I dont have all the time slips in front of me but from what i can remember the slowest time i had was around 12.7 - 12.8 and those only happend when i missed a gear or had a really really bad launch (2.0 60ft or above)
here is a pic of another run against an 01-02 supercharged (Vortech) mustang. On this run i only managed a 1.93 (vs 1.83 for the other run) but still got a 12.43 et....trap speed was a little higher too

shopdog

Pure stock, perfect drivers, I'd agree, about 2% to 4% faster. But with some fairly inexpensive tranny mods, the A4 can be a drag champion, and has been over the years in a number of different GM cars.

Curtis A. Franz

What is marginal about the first gear difference? The A4 is 3.15 x 3.06 = 9.64 (torque multiplier). The A6 is 2.56 x 4.03 = 10.32 (torque multiplier). The A6 in first gear is 7% lower than the A4 using the G90 option axle ratio!

SHOOTER 49

WS6JJP I complement you on your times and ability handle the mn6. I have had 2 MN6'S --one in a 97 LT1 and the other in an 01 LS1. I had manuals off and on from 3 on the trees through 4, 5 and 6 speeds. I can really drive a manual well except in the heat of the moment---that is to say when it mattered the most---I usually would not get a good launch --call it nerves or left leg jimmies---but I would foul up somehow and be playing catch-up. Once rolling I love them ,but I could never get the car launched until the automatic was out and rolling. In fact I used to prefer racing against other manuals when I had one at the strip--even playing field.

For me to get a 12.4 the car would have to be capable of 12 flat as I would waste time getting her rolling. Good driving buddy.

cbrf4i1

I couldn’t agree with you more…no matter what someone does to modify an a4 there is no denying the fact that m6 will have a better mathematically gear ratio (staying in the engine power band better) than a4 ….and IF THE DRIVER OF M6 HAS THE FITNESS / SKILL TO take advantage of that there is no a4 stock to stock can kept up with the m6, period.

vette-oholic

in the past few years, the majority of vettes have been auto, but the c6 has brought out alot of the true enthusiasts which prefer a standard. also, i think the age group of people buying new vettes is getting younger and we prefer a manual at this point in our life. i think these are the 2 main reasons that there are more manuals than automatics produced in 2005