342's won't auto ****
03-22-2011, 06:48 PM
#2
As Taylor@Dallas Performance told me:
Over revving the engine is extremely hard on the engine. It only takes a couple of times for that to happen to create serious damage.
03-23-2011, 12:52 AM
#4
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I changed my ratio to the 3.42 and bounced off the rev limiter a few times. It is all about the tuning. I had mine screwed up and was out by about 12 %.
08-19-2015, 03:31 PM
#5
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St. Jude Donor '13-'14-'15
Although you don't do a speedo correction on a C6 with a gear change--you must to a
"shift point correction" when changing gears-----This cannot be done with most handheld tuners--You need someone with HP tuners or EFILIVE----A simple mail order tune would do it--Many mail order tuners on the forum for like $150
"shift point correction" when changing gears-----This cannot be done with most handheld tuners--You need someone with HP tuners or EFILIVE----A simple mail order tune would do it--Many mail order tuners on the forum for like $150
08-19-2015, 03:39 PM
#7
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Although you don't do a speedo correction on a C6 with a gear change--you must to a
"shift point correction" when changing gears-----This cannot be done with most handheld tuners--You need someone with HP tuners or EFILIVE----A simple mail order tune would do it--Many mail order tuners on the forum for like $150
"shift point correction" when changing gears-----This cannot be done with most handheld tuners--You need someone with HP tuners or EFILIVE----A simple mail order tune would do it--Many mail order tuners on the forum for like $150
08-19-2015, 09:17 PM
#8
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St. Jude Donor '13-'14-'15
Well in EFILIVE a stock C6 has the rear end ratio entered as 1.0 ----and the e ECM pulses per mile as 771-----EVEN if you change the rear ratio to 3.42 --the pulse per mile remain as 771-----This tells you that a rear end correction is NOT required Also having the stock rear end ratio at 1.0 in the STOCK tune tells you it's not required----In EFILIVE there is a box that is checked with an x for "transaxle" Any transaxle sensored speedo does not require a change in the tune for a different rear ratio
Don't know what software you are using But I always verify the speedo with a GPS and have never been wrong yet----
If you made the change on a manual trans car sure you would never know the differernce because even if you changed the rear raito the pulses remain the same at 771----But on an automatic car---the auto trans uses the TRANS output pulses to make the trans shift correctly --the speedo pulse remains 771 but the trans output pulses go way crazy like 2636 and you''ll get a component slipping code and it won't shift correctly
Don't know what software you are using But I always verify the speedo with a GPS and have never been wrong yet----
If you made the change on a manual trans car sure you would never know the differernce because even if you changed the rear raito the pulses remain the same at 771----But on an automatic car---the auto trans uses the TRANS output pulses to make the trans shift correctly --the speedo pulse remains 771 but the trans output pulses go way crazy like 2636 and you''ll get a component slipping code and it won't shift correctly
08-20-2015, 05:36 PM
#9
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St. Jude Donor '08
An auto C5/C6 requires the adjustment shown here when a different rear end ratio is installed when using HP Tuner software.
Unknown how EFILive deals with that. But something would have to be done as there is a speed/rpm relationship that the auto tranny uses to shift which is altered when a different ratio is used.
Unknown how EFILive deals with that. But something would have to be done as there is a speed/rpm relationship that the auto tranny uses to shift which is altered when a different ratio is used.
08-21-2015, 01:46 AM
#10
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St. Jude Donor '13-'14-'15
Just because HP shows that you can enter different numbers in that file does not necessarily mean that it's required----As I said yes you can change the rear ratio with efilive but even if you do the pulses per mile always remain 771----HP does NOT show you the pulses per mile or per kilometer as does EFILIVE--- The REAL speedo table has at least 10 different tables in EFILIVE HP only shows you 2-----Tune as you wish---My experience with tuning 100's of C5's and C6's is that I never make or am never allowed to make a correction with EFILIVE software with a gear change-----only tire size changes--
08-21-2015, 09:55 AM
#11
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St. Jude Donor '08
Just because HP shows that you can enter different numbers in that file does not necessarily mean that it's required----As I said yes you can change the rear ratio with efilive but even if you do the pulses per mile always remain 771----HP does NOT show you the pulses per mile or per kilometer as does EFILIVE--- The REAL speedo table has at least 10 different tables in EFILIVE HP only shows you 2-----Tune as you wish---My experience with tuning 100's of C5's and C6's is that I never make or am never allowed to make a correction with EFILIVE software with a gear change-----only tire size changes--
http://www.hptuners.com/forum/showth...TCC-TM-(w-Pics)
Last edited by jim2092; 08-21-2015 at 09:58 AM.
