13.145 1/4 Mile time with an automattic tranny and shiitty Stock Goodyear tires!!!!!

[NavyKnight]

I just wanted to spawn some dialogue around the fact that an automatic GXP is generally quicker than a Manual GXP.

My comrade Craig Lewis an I went to the track today. Craig's setup I believe is the GMPP Tune and mine is a custom HP Tuners tune. I have a high flow CAT and he doesn't and we both have cat back exhausts. My CATBACK is the SOLO Street Race Exhaust. We are both on stock crappy tires. Everything else on both is stock including turbos.

I will be posting the video soon, as it is uploading right now. The vid you see was my first time ever on a 1/4 mile track. I didn't know when to GO and just waited until he went then I followed. I caught up to him, and it was obvious there was a significant power difference in favour of the auto tranny. I bet on average Manuals will get mid to high 13's and automatics will get low 13's.

Maybe you could attribute this delta to the tunes as well, as the GMPP Tune is not as aggressive as my "warranty killing" custom HP Tuners Tune.

You Tube

My worst time today after 13 runs was 13.753 secs and my best time 13.145. All I hear is tires screeching during the starts, so I bet with better tires I can break into the 12's.

[Gizmo]

Those are great numbers, NavyKnight. Congratulations!!!!

That pretty much confirms your numbers with the G-Tech Pro, certainly in the ballpark, anyway.

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[Alan_L]

how about you come to Albuquerque and I'll race you in my manual transmissin GXP, since you started an entire thread to talk smack about felow members of this community, and I am betting there are more manual owners on here then autos. The simple fact of the matter is that it takes 0 skill in launching an automatic down the track, you hold the brake, give it some gas, throw it in competition mode and away you go. If you wouldn't mind backing up you claim that automatic kappas are more powerful I would appreciate it, because the gm tune is LESS power on the autos because they can't handle the power and the fastest kappas from what I can find are all manual transmissions, so please, enlighten me.

[normsf]

Oohh a glove has been hurled for a challenge! Sounds like some fun, though autos are more consistent, yet not always the fastest.

[JeffInDFW]

You have a high flow cat. He doesn't.

You have a HP Tuners tune that is more agressive than his GMPP tune.

He was not using the No Lift Shift feature and was losing boost by lifting on each shift (watch the video and you see it).

So, that is why you won.

Bone stock cars, the auto WILL be quicker because the manual transmission cars had such terrible nanny controls. You could feel the power drop off like CRAZY on each shift because of the torque limiting written into the software. The GMPP tune takes care of that problem.

If an automatic Kappa IS faster than a manual trans Kappa, then us manual trans guys can always just do a few more mods to make up the difference, and we still won't be stuck driving a car with an automatic.

[Alan_L]

When I posed earlier I was on my Pre and couldn't watch embedded youtube links so I just watched the video and would like to add to my post.

First, I have to say lol to you Jeff because you speak the truth, at the end of that day at the track one Solstice owner was driving home with an automatic having 0 connection with his car and the other one had 100% control over his car and had a bond with it.

Second, I also agree with Jeff that your friend was clearly not using his NLS feature causing him to loose boost with every shift. Automatics don't loose boost because there is always a load on the engine during acceleration, GM corrected this handicap, if you would, with the NLS.

Third, the time slip backs up my theory that your friend is still learning to drive his manual if that was him next to you. He was putting down 2.2 60 foots which probably means he was spinning because he wasn't modulating his clutch and gas to prevent that where as you just mash the gas and away you go. You can tell you don't really know how to race at the drags either because the first and only run I watched it took you

Last, let's see you take your car into the dealer when something breaks and have them honor your 100k warranty. If what you are saying is 100% then they will laugh you out of the place, but they would fix your buddies car up in a jiffy. I would really like your friend to come post up in here about his side of the story because I have a hard time believing that someone with a GMPP tune that knows it has NLS wouldn't use it. And my offer still stands, come on down here to Albuquerque and well run em, or if you live close I'd be willing to drive a few hundred miles to show you that standards are "generally faster" then manuals.

[IBDRINKEN]

i have a hell alot of more mode than him and the best i can get is 13.2

[Kelu]

IBDRINKEN: the track is very important.

My best temp is 13.30 and my best 60ft with stock tires is 1.90.
My mods: Wester Race Tune - Solo catless dp, mach, quad tips - Dejon IC - Custom Throttle Elbow - Custom Backbone Brace
GMPP tune is weaker than all aftermarket tunes, also from my experience the downpipe is making a 0.3s difference in ET. This race has nothing to do with the tranny. I would love to be there with you guys.

Navy: nice performance for the first run on a track, I remember mine I hope you get in love of the track and do it often.

[NavyKnight]

Sorry, I didn't mean to talk "smack" (show me what I said that made you take offense). I do enjoy the dialogue, because there is this paradox/uncertainty that we need to explore. (Are auto's generally quicker than manuals?)
Yes, there is little skill involved with my automatic. Yes, my warranty is blown, boo hoo. But with 3 mods all together costing under $1500 (a good HP Tuners Tune, SOLO's high flow cat and street race muffler) I just wanted to give automatic tranny drivers some "hope", as we always get made fun of, for not choosing manual. If I didn't have to deal with day-to-day traffic it would have been nice to get a manual tranny, but then my car wouldn't be 13.145 secs. : )

I think Jeff summarized the delta clearly. The High Flow CAT and Tune are the most effective ways to increase power. I bet with better tires, 0.3 secs can be achieved to bring a low 13 car into the high 12's.

Alan L, I don't mean you any offense, you have lots of passion in your posting. If you want to analyze the slips against the video, please analyze the slip below which matches the video above. The slip I showed above, was my fastest time for the day. The slip shown here is what matches the video. It was the slip for my first 1/4 run ever that's why I didn't know when to launch and just waited until the other car went.
You need to ignore the Car# line as they get it wrong half the time. I was on the right lane he was on the left lane. In his defense, his best time for the day was 13.618 on another run where I did 13.320 on that same run.

[I1ULUZ]

Originally Posted by Alan_L Second, I also agree with Jeff that your friend was clearly not using his NLS feature causing him to loose boost with every shift. Automatics don't loose boost because there is always a load on the engine during acceleration, GM corrected this handicap, if you would, with the NLS.

Torque Management on a Auto is worst than a manual car, it pulls power during the shift to protect the trans. I've heard the bypass valve open while at WOT during a shift.



Navy

Can you post a couple of your other Time Slips? Maybe worst to best would like to see how the ET changed and where the change happened. TIA.

Who did your HPT tune? Canned or on a dyno?

[tazz]

Why would anyone get upset with NavyNights post over times? his first time at a 1/4 mile and just makeing a comment, was not a challange between auto or stick. No reason for anyone to go on an overload.


08 Deep GXP

[Highmiles]

Torque multiplication.

Click on:

http://www.solsticeforum.com/forum/903416-post83.html

[Gizmo]

Originally Posted by tazz Why would anyone get upset with NavyNights post over times? his first time at a 1/4 mile and just makeing a comment, was not a challange between auto or stick. No reason for anyone to go on an overload. 08 Deep GXP

You're right, tazz, NavyKnight said nothing offensive in this thread. I think Alan_L might be referring to this thread:

How to customize the Solstice so you don't get laid.

.

[TecSolOnt]

Those are nice times !

Here is the only posted time from the Sol V8 forum, 13.87's . So go to all the trouble of putting a V8 in it and run slower than a turbo or S/C'd car?

V8 Solstice & Sky 1/4 Mile Times

Personally I like the auto in my S/C Sol it has so much torque low end that you can focus on keeping it straight while the auto does the shifting. It suits my style of driving since I am not into slalom and lets the wife get behind the wheel occasionally. To each their own.

[NavyKnight]

I'm hoping my other offensive threads don't spill into my new PC threads. If so people are taking stuff personally, my bad.
Anyway IWONULUZ, I would be happy to post the slips of all 13 runs tonight when I get home. I am really interested in your insight as I need to learn what these numbers mean. I will try and educate myself on the meaning of each of these numbers, but your inputs will certainly speed up my learning curve. If a 1/4 Mile primer/"for dummies" does not exist, I will be happy to post one when I learn it all this week.

I will also try and post the related videos as well so that you cna hear the tire sounds and watch the RPM's as the GXP runs through the gears. I love all this scientific talk about it, because this experiment is interesting as it is trying to answer the golden question:

Why is this 2007 automatic GXP hitting low 13's ? Is it the Tune? or is it the High Flow CAT? Is it the Track giving generous times? Is it the weather? 10 Degrees C.