Bad 1/4 mile times?

[lmteel]

So I went to the track the other night with my 2010 SHO and my fastest time was a 13.4. I know guys with the same mods are running 12's, what am I doing wrong? I live in phoenix and it was just about perfect out there about 70 at night. I have a Airaid intake, custom magnaflow catback and a boost tune from Torrie. Any thoughts? Also, seems most were running slow, new camaros and mustangs were running in the 14's all night.

 

[SHOnUup]

Time slips?

Rich

 

[curry67]

Probably just the timing system at the track well atleast for 40 yard dash electronic timing can be out of wack very easy. Or simply the track is super slick and no one can get traction

 

[lmteel]

R/T: .750
60: 2.058
330: 5.682
1/8: 8.707
1000: 11.295

ET: 13.489
MPH: 103.41

Maybe its my tires, i need new ones but I wasn't spinning a whole lot. With Torries tune this thing always wants to rip the tires off going into second. No complaints though. And by the way I never pay attention to all those numbers so don't rip me if some suck haha

 

[SHOnUup]

Looks like you've got .2 to make up on your 60'. Could be combo of bad prepped track and tires, or maybe launch technique. Avg. 60' would be about a 1.83.

How are you launching the yacht?
What track and time of run? I could pull up the DA for the night.

Rich

 

[lmteel]

I usually try and brake boost at the line around 2000 rpms. Could lowering the car and getting new tires help? The track is Wild Horse Pass Raceway in Chandler Az on 10/5/14. About 10 pm. I mean Im happy cause thats the best time Ive had in it, but I know it should run better.

Looking at other time slips on the forum, its almost like the car is falling off in the top end. Am I just seeing things?

 

[panther427]

Haven't looked up your track yet but your times remind me of my times at bandimere in Colorado. The Da or plain altitude high??  You have to compare your times at your track to other racer there the same night.  I doubt I will make it into the 12 where i live due to altitude.

 

[panther427]

The Da for your track on that date and time was around 3000 feet above sea level.  So it will have some effect but your times still seem slow.  Could be a timing issue at the track or slick.  Have you data logged and had your tune adjusted by torrie? His initial tunes are set on the safe side to protect the consumer.

 

[lmteel]

Other times were slower than expected for 'performance' cars too. Could not having my car retuned after a catback install hurt or help? I'm trying to do data logging with just my hand held SCT (I own Macs) but can't get it done for some reason and since haven't gotten a new tune.

 

[SHOnUup]

That DA is no help for sure. But I think some fine tuning would help a ton. Lowering the car with stiffer springs and shocks will help on the launch for sure. After exaust a new tune is recommended. There should be a how to video up shortly on datalogging to help in the process.

Rich

 

[Courier6]

Like it was said earlier, your 60 foot time is bad suggesting a grip/launch problem. Are you turning off Advance trac/traction control? Are you in "S"port mode?

 

[lmteel]

Ok, I feel like a dummy now. How do I get into sport mode? I usually turn off traction control. Is there something else I'm not doing?

 

[SHOdded]

Have a look-see through this thread, it will help get the most out of your SHO:
http://ecoboostperformanceforum.com/index.php/topic,1239

Is your SHO PP or non PP equipped?  See the OM for info (pg 251 in case of 2010 SHO).  Only PP SHO's can turn it all the way off:
Control switch pressed and held for more than five seconds, vehicle speed = 0 mph, brakes applied

Videos on Advancetrac:
https://www.youtube.com/watch?v=J1gWhMUqnHQ
https://www.youtube.com/watch?v=IutZ2sGyOUo
https://www.youtube.com/watch?v=dF-nfq-rC7I

 

[panther427]

Just to clarify. You only have the first tune from torrie?


I'm not sure you can make up .2 on the 60 foot with that da!  Also have you modified your intake by adding extra weather stripping or a lid?  Where your runs made back to back?  Heat soak would be an issue. Another thing I just thought of since you have a 2010 model.  Have you changed your spark plugs and do you know the gap on the plugs.

 

[lmteel]

I have the non PP. And yes, first tune from Torrie, no data logging. The Airaid I have came with the weather stripping for the top of the box. Is that what your referring to? Having a hard time finding a windows device to run Livewire. Can I just data log off of the SCT without being hooked up to a computer? I was thinking about buying a cheap tablet just to data log. Anyone else doing that?

 

[SHOdded]

The issue with the Airaid has been not sealing completely against the hood, thus allowing heatsoak.  Make sure the strip is facing the correct direction (post a pic if unsure), and mark the top with chalk to see if it makes a good seal when hood is closed.

Helpful to have a Windows tablet to run any SCT software or Forscan.  Now that Forscan is available for the iPad, you can use an OBDII wifi adapter with it (Bluetooth is a nogo), but that wouldn't help you with the data Torrie needs.

 

[ZSHO]

Agree with Panther,plugs gapped at 0.30 and 160 or 170 stat with a new revised tune accordingly.

 

[SHOnUup]

ZSHO, you don't agree with me and Manu? Ha...just kidding buddy!

Great advice though, check those plugs.

Rich

 

[91hybrid]

First thing to do is data log and see what the engine is actually doing. Figure out what boost its making, what timing and knock you are seeing.

Based on those, then you can get some insight into your performance.

 

[lmteel]

Thanks guys. Very helpful info. I'll look  into the thermostat and the weather stripping, now that I think of it, my filter was a bit warm today. A little off topic but does anyone have any suggestions for tablets that I could download the live wire software on ? And can a droid based tablet download it?