1/4 mile seems way too slow
 

Wife got 8 runs in tonight, 60fts were bad (2.3ish) and times varied a slight amount but traps were only 91ish mph. Should it not be around the 100 mark?

forge bpv
ttr solid motor mount
1.25" hardcore rear sway bar
Trifecta over Gm stage 1
Kn intake
cat less downpipe
91 octane
general gmax 215s (factory size)
AUTOMATIC

should she be running in "I" to hold out each gear longer or?

​​​​​​best time was 15.06 @ 92 I think which is pretty much bone stock range no? What gives?

what should boost be roughly on stage 1? Thinking maybe there's a boost leak somewhere. 12-15psi stock, 18 on stage one and 20+ on trifecta or are my assumptions off

I'm 22-23lbs on a Trifecta tune

Well I figured some of the issue out.

wife was hitting the traction button only once, so disabled traction control but never went into comp mode n activated the trifecta tune. Saw 21+psi on the street so we will test it n see

I'm at 22-23 on the GM upgrade since 2009. Still strong.

Any track days or updates C-Dub?

Still no better.

Best so far was 14.50s @ 93mph.

Even with a bad 60' or crappy traction tires, I would expect the Trap speed to be 100 or higher. I have read others trapping 103+ with the trifecta tune, so I don't know. My elevation is pretty much zero, so I would expect it to have more power than others...

I would suspect a boost leak or something with your MAF?

Also, I will say that I've never driven the automatic...I would try shifting manually and higher up in the power band.

Hell, try the launch mode and see what gives.

That's one of the dumb things with the autos, there is no 'manual' auto mode, Its either Drive, or 'I' mode, you can't force it to hold gears in either.

It's always in Comp mode with launch control @ the track (only way Trifecta is active) Wife still hasn't figured out the sweet spot for RPMs to launch properly, but even with a crappy launch the trap speed would indicate the potential power and what its capable ET wise, which seems low. Maybe its the gearing in the autos, but it does seems to run out of steam by 3/4 way down the track. Maybe this is all the Trifecta is capable of, and I need to look into a local HP Tuner tune to unlock the full potential.

Don't think there is a boost leak, I've seen 21+ lbs on the street. We have been tossing around the idea of a ZZP intercooler complete kit, but also the idea of selling it for something that doesn't run premium, so who knows at this point.

Any updates?

wow - that is slow - - - i ran my auto a few yrs ago at great lakes dragaway in WI & 1st pass was a 14.1 at 99 mph - - - all i have is the GM tune upgrade & magnaflow cat back exh.