Nosferatu

7.7 @ 95 to 11.7 @ 122 I did with just headers and a tune. Almost the same numbers. That tune sounds stupid conservative. You should be near 130mph.

OUT2WIN

Who would you recommend to tune the car and/or the trans? Injectors are the 60lb that come with the kit, with a kenne bell BAP. I had already scheduled the car to go in for a smaller pulley with ID 1000 injectors. I was told I needed a bigger fuel pump also and at the moment I can not swing all that.

A6 also?

speedmon

600whp.....3300lb car.....11.5?

Before you jack with the tune, I would put some wide sticky tires on the back and try again.

Also ....data log the runs so you can see the data.....like power being delivered when and throttle position at max when?.....
With the log you will see how much TQ the tune is pulling out between shifts. I remove ALL TQ Mgmt.....

For me with boosted cars its usually more often a foot/traction problem.

600whp....that thing should almost lift if you can get traction.

BTW.....I have an A6 GS too.....love that car.

OUT2WIN

I am looking for some wheels at the moment. If I can find some C5Z front wheels in the next week I will purchase them and throw some hoosier drag radial 275/40 on them. If not, I will get some Weld 17x11 and throw some hoosier 315/35 on those.

I also have a Aeroforce Scan gauge I will have to hook up and see about WOT and stuff. When we had it on the dyno, I paid the shop for the credits so they can data log while getting a few pulls. I wasnt told anything was too far out of wack other than 90% injector duty cycle at 6200 or 6400 rpm.
He did mention that the tuner had a certain "timing" all across the board when it goes into boost or maybe it was a certain amount of timing being pulled when it went into boost?

Nosferatu

manual non-Z51 so taller gearing to boot

Traction aside, that 1/8th to 1/4mi gives you an idea of pulling power and leaves traction out of the equation. Your tune is really mild or really pulling power. For example...

You took 3.9 seconds to go from 98 to 125mph (about 27mph). Respectable but not bad. My 1/8th to 1/4mi took 3.6 seconds and gained almost 31mph. My 1/8th trap started at a higher speed too (babying it (2.3 60' lol) I was at 104mph in the 1/8th ripping it to 135mph). Car makes 640RWHP just to give you an idea (Mustang dyno).

ajrothm

I agree something seems off. My buddy's 2011 GS went 11.0@126 with Cam/exhaust/stall/drag radials in +500' DA.. It made 500rwhp converter locked.

586 rwhp should be going 130 mph at a minimum, really more like 133-134 mph.

Need to log it and make sure it's not pulling timing down the track.

OUT2WIN

Yea makes me think its on the top end of the track now. Where I figured the 228/236 cam would make more power.....

Yea I wanted to get a higher stalling tq converter to get in the 10s at my current MPH but I am starting to see a trend here. It's in the back end of the 1/4 mile where I need to fix it. Wouldnt a few passes on the dyno tell me if its pulling timing as well? I have 2 different dyno sheets from 2 different shops. I can possibly get the third dyno sheet from Tom Wong from when he tuned it on his dyno. The last dyno I personally took it to data logged the 3 or 4 hits where it made 586 rwhp.

ajrothm

It may not pull timing on the dyno because the pulls are so short and the IATs stay down. All depends on your IAT/timing table. At the end of the 1/4, your IATs may be a little higher then your table threshold is set at.. However I doubt this is your problem. You're gaining 27 mph on the back half which is decent, however it should probably pull 29-30mph, but at 2500+ DA, it may not. Your 1/8 mph is not that great, that's why your trap speed in is low. A stock converter may be killing you so much in the first 100' that you can't get into the powerband fast enough. Hard to say, could be a lot of things honestly.. But it should mph more for 586rwhp..

A converter will wake it up BIG TIME but....I still think it's off for the power it makes. Unless your raceweight is very heavy.

In 0' air you would run 127-128 mph as it sits.

I'd check all the easy stuff first: belt slip, timing retard (KR), AFR, etc etc..


FYI:
https://www.corvetteforum.com/forums...converter.html
H/C c6, ls3, stock converter/2.56 gears

EXstang

I think it's the stock converter and tires that's holding you back... That cam put your torque range higher and that lazy converter can't get you there quick enough

OUT2WIN

Thanks for the involved post and for your help. I want to run it one more time in good weather with drag radials then I'll address the tq converter. I will check all the easy stuff while Im at it

I've asked that a few times to different people without a clear answer. I know with the few LS based trucks I've owned, a cam alone will help on the big end, but you need to help get it moving.

What's a good converter to go with for my setup? This is getting spendy quick........

EXstang

I would call whomever that cam come from and see what converter matches up with that cam and go from there.

Streetk14

Where are you located? I have a set of very nice Speedline C5Z 17" wheels that I've been meaning to sell. I bought them new and have only used them a few times. Still have a decent set of Hoosier 275/40/17 drag radials on them, too. Let me know if you're interested.

EXstang

How much do you want for them

Streetk14

I'd take $400 for them. Just don't really know how to handle shipping them if you're not local.

OUT2WIN

I'm in Washington state. Where are u located?

realcanuk

Get a tire setup before you spend money on a converter. That 60 ft is killing you. I ran averages of 10.7-8 and bests of 10.41 with similar power, stock cam and stock converter. It's a base C6 so maybe a bit lighter but still. The stock converter is more than capable on an A6.

ajrothm

+1

I wouldn't change the converter until everything else is done and it runs the numbers it should for the power it makes.

The converter will knock .5 off but...the car will never drive as good as it does with a stock converter, especially over 30% TP. And you can lose mph with the converter if it's not right.

realcanuk

.5 is pretty ambitious. Was low 1.6's on the stock converter.

ajrothm

I meant .5 in the 1/4, not the 60'.. Lol

realcanuk

I knew that. Lol.

Still half asleep. !!!