Potent68

Hopefully yours don't keep haunting you too. The added bonus for me of going back to the stock air cleaner assembly is that I can run in the stock class at the autocross races. Even having a different air cleaner puts you into a modified class where people can have WAY more done than just a simple air filter.

AmbulanceDriver

We will see. So far so good knock on wood! Really? That's crazy we don't really have autocross stuff in my town unfortunately.

Potent68

I have to go North or South by about 30-45 minutes to find it but that's a fun commute in these cars. My problem now is trying to decide if I am going to go to the autocross or the dragstrip now that the car is running so much better. I still can't get over how great she feels now too. It's unreal.

Trash

Simply getting your 60' down to 2.0 or better will get you into the 12.xx. MPH may come up a little but that is more dependent on accel through the rpm band and DA.

LS6FRC

I always gap my plugs to .040

LS6FRC

from my experience with all my ls cars I've owned Fred Meyer gas slowed my cars down. I would suggest chevron or Phillips 66

racebum

oddly enough we only have 5 refineries around here and chevron owns none of them. that gas is coming from some other brand unless they truck it or ship it from elsewhere which is doubtful since 90+% of our capacity comes from those 5 and cherry point is the largest which is owned by arco/bp

robz

Make a small log of all the details if you get back to the strip and we can give you some pointers if necessary. Glad to hear the car is running better.

gordy02corvette

Corvettes are road racers, not dragsters!!!! You can actually turn right or left and use the brakes with your vette!!!

Trash

They can do both, quite well.

Potent68

LOL, that's why I took it to the autocross also, and will be autocrossing again this weekend!

I figure compared to the life of confinement the poor car had (remember, I bought it with 86xx miles on it in January) the car is finally being used as the General intended.

HONK 3X

I highly doubt putting the stock intake on will make your car faster....

Potent68

I'm not sure I said it would, and I don't have time to go re-read all of my old posts. What it has done was put it back to original condition to help with troubleshooting. It has also allowed me to run in the stock class for autocross, and has kept those left/right bank lean codes from recurring.

I still have the Blackwing on my workbench in case I decide to go ahead and use it if I ever install headers and a mid-pipe on my car. Personally though, I'm not a fan of oiled filters and would rather not use one.

garrettg

The mail order tune option from ECS and other vendors are pretty good for basic mods like intake. I had issues with my vararam, was getting cel, tried the metal screen which did help some but it was still off the charts on ltft and pig rich under wot until I got a mail order tune which adjusts the VE and MAF translation table correctly for the intake. I no longer user the metal screen. I have since learned how to tune some and made further refinements using a wideband and hptuners but I digress in my post. The main issue with adding an intake to the stock tune is the car runs very rich at wot and putting on an intake on it actually causes it to run even richer during wot due to how lean it can run during cruising conditions. The cruising adjustments are added to the wot fueling which causes this super rich wot condition as its sort of a ecu safety measure. I wouldn't give up on your intake just get a mail order tune and enjoy the benefits from a shop that has tuned thousands of c5's with the same mods you will most certainly enjoy the throttle response and extra power just from tune and cold air intake on this car imo. They will also adjust the fans, cags, raise the rpm and some other items.

Potent68

****UPDATE****

I took the car back to the track today in bone stock form.



I was in the right hand lane. The left hand lane was a cam/heads/headers/exhaust/air cleaner C5 non-Z06 car. I was a tick faster than him at the 1/8th and then he somehow out MPH'd me by 4 mph both runs. I'd expect him to be faster, but I was faster for most of the run. Different red line? Different gear ratio? MN6 vs MN12? Either way, it was great fun and I'm so glad the car is more in line with my expectations now.

Here's the DA and correction.

Scotty2000SS

OP are you running a catch can? Somethings still up on the back half of your time...

Potent68

Negative. Bone stock from a performance perspective. I have dyno time with Tom Wong at the end of the month just to make sure nothing is awry. Theoretically, the previous owner could have had it tuned, so that will be one of the things we're going to check. I'm not having it tuned at this point, other than putting it back to a stock GM tune if it has anything else on it currently.

I'm just wanting to make sure I don't have a weak coil pack or some other mystery issue making itself known. I figure it's just one of those things you deal with with a car that was barely driven 500 miles a year it's whole life. Issues like this wouldn't be noticed when you're just slowly cruising to the car show and back.

Scotty2000SS

I highly recommend adding a catch can and another bottle of sea foam before you hit the dyno. Run that tank out with the sea foam too before you hit the rollers.

Ask me how I know lol

robz

Your car seems like its running fine.
Some more seat time with better your ET and also increase the mph a bit as well.

Proof is your timeslip. That driver in the left lane needs more practice and its affecting et as expected but mph as well. The setup could be off as well but most often in my experience driver error plays the biggest role.
Nice pass.

Potent68

Pulling this one back up for an update.

I took the Z06 up to Tom Wong today and he strapped it to the dyno. To make a long story short, he found that the car was going rich by almost a full point in the air/fuel about the time I thought it felt like it was struggling at higher RPM's. It looked like a stock GM tune too. Tom worked his magic and I can definitely say that any weird hesitation feeling is completely gone now and the car feels noticeably smoother all around. It even got about 27 mpg on the drive home despite a few 3rd gear blasts to test it.

I am so glad this wasn't in my imagination and there was actually something weird happening.