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air intake temperature and the effects on performance

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Old 06-08-2011, 04:43 AM
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Something is definitely off. Do you remember what the outside air temps were like when Nelson received data to setup your tune? I think you are getting spark knock, and the timing is retarding.
Old 06-08-2011, 04:44 AM
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10bucks says your tune is very consertative.
Have you looked into tuning yourself?
A few degrees of timing and the AFR off some can make a huge diff. My turd of a truck ran low 8s in the 1/8th on 6psi and a 45 shot on a stock lq4.
Whats your AFR?
Old 06-08-2011, 12:00 PM
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Originally Posted by CashDudeHomie
Do you have a wideband? Boost and mail-order tune without a wideband is not a good idea IMO.
Yeah, I have a wideband. I should have just went with texas speed for the tune.. they are 20 minutes from me, but I had numerous people said Nelson mail order tune is better lol ... live and learn I guess

Originally Posted by Gadgetized
Something is definitely off. Do you remember what the outside air temps were like when Nelson received data to setup your tune? I think you are getting spark knock, and the timing is retarding.
Then temps outside were probably about 70 degrees when Nelson sent me my first tune. I just got the PCM with the new tune in today, which it has been consistently 100 degrees the past couple weeks

Originally Posted by nonnieselman
10bucks says your tune is very consertative.
Have you looked into tuning yourself?
A few degrees of timing and the AFR off some can make a huge diff. My turd of a truck ran low 8s in the 1/8th on 6psi and a 45 shot on a stock lq4.
Whats your AFR?
I haven't looked into tuning myself, I actually wish I would have just, instead of throwing the big $$ for a high performance mail order tune, buy EFI live or something and learn how to do it.. at least that way I could monitor what is going on. The AFR is usually around the low 12's
Old 06-08-2011, 08:47 PM
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installed the new tune just now.. feels exactly the same pretty much. My 0-60mph even got worse by almost a second. It's INSANELY sluggish until boost kicks in, I mean you don't feel any g-forces or any force pushing you back into the seat

at WOT the ignition advance was in the 30 range. I don't know what that means maybe someone can shed some light on it?
Old 06-08-2011, 08:57 PM
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THIRTY?!?!?! at WOT????? under boost?????
Old 06-08-2011, 09:05 PM
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No way. Unless it's with 111 octane.
Old 06-08-2011, 09:06 PM
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Or E100.
Old 06-08-2011, 09:15 PM
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It might be 30° at WOT if it is not yet in boost.
Old 06-08-2011, 11:24 PM
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lol I might be looking at the wrong thing or something.. I'll get a video of it and post it up while I go WOT and have the camera aimed at the gauges (showing AFR, boost and ignition advance)
Old 06-09-2011, 12:13 AM
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Subscribed to find out the issue. Best of luck with it.


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