why does my truck run mid 13s

slowlmm

New member
Mar 2, 2008
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yes:D



There is also GM.BOOST2_DMA just subtract the 14.5 or whatever it is

Have you logged tht one never tried it is it acurate i have just used the other becuase it was always within 1psi of my boost guage.


Matt I looked at your logs well the first one here is what i see your shift points are two low. your truck is dropping way off boost it looks like your shifiting around 3,000 rpm instead of around 3,500-3,600 rpm and your vane position min looks a little low. it may be falling off a little on boost there those where the main things tht stood out. look at both of those and tht should help. Theese where all things i needed to correct on my truck to make it faster as well so this should help. goood luck. Im sure sometheres can chime in on more info for you as well :D
 

SIKDMAX

Highway Burnouts!
Sep 14, 2007
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www.sikdmax.com
Thanks Tommy. That was stock TCM tune leaving it in D no manual shifting or anything.

Im definitely going to work on a raised RPM TCM for next time.


Also need to update all my EFI - thats going to be a challenge I bet :eek:

Going to work on that today.
 

sweetdiesel

That's better
Aug 6, 2006
10,390
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Thailand
No Kurt.

Simon Im hitting first light and building boost and letting RPMs come up slowly then bumping 2nd light..... 6-8 seconds between the 2 lights.

Like I said this morning on my "test track" I had no problem launching at 2200 like the logs show. I dunno I guess back to the track in 2 more weeks logging.

Matt
I myself have had this issue,Couldnt get it build power NO MATTER WHAT
I got smoked by a lame ass ford:eek: because of it
try letting off the throttle and then get back on it,maybe:confused:
remeber reaction time doesnt meen squat:)

im 99% positive its some type of TQ management,just not sure how you get around it on your truck
 

Bako_Dmax

GTO Slayer
Apr 3, 2008
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Bako
Ya whats up dude where were you?

Hey if you can and get the Californian check it for me :D

Camera guy and reporter did like a 20 minute interview and took 50,000 pics of me and my truck for some article.... dunno if it was for today probably not more than likely tomorrow but who knows


Left a message in your other thread, had to unexpectedly work late on Friday. Ill check the paper for it, you can look online also. Bakersfieldcalifornian.com
 
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Bako_Dmax

GTO Slayer
Apr 3, 2008
657
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Bako
I got to Famoso late I only live acouple miles away, you left awhile after I showed up. I heard when you smashed leaving Famoso :D. Temps here are high during the day. I did a pass last night just wanted to see were the truck was at, stock ccsb LBZ with a Bully dog ran a 14.9 in 2wd :eek:, I was expeting a 16 so I guess that made my night. I ran a friends C5 afterwards from a roll and he beat by a car or two, and from a stop the truck lit up the tires and he got by about 3 lenghts. Pretty cool to see these trucks move like that, I had some passengers too. Good luck with the truck, those kind of issues are a pain but worth it in the end.

Is this Danny?
 

LBZrcks

.........
Jun 2, 2007
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Thanks Tommy. That was stock TCM tune leaving it in D no manual shifting or anything.

Im definitely going to work on a raised RPM TCM for next time.


Also need to update all my EFI - thats going to be a challenge I bet :eek:

Going to work on that today.

I think there is still something wrong though, I ran 13.2's at fontana on ecm tunning only before my lift pump and downpipe. raising the shift points should help though.