Converter
02-24-2012, 09:35 AM
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Converter
Next stage of the truck is finished up. Just got a 2600-2800 Circle D converter and billet flexplate installed last night (also found a failed rear main seal). VERY happy with the converter purchase though and recommend other GMT900 guys consider CircleD as well if looking for a converter.
During normal driving with light throttle the truck feels like stock, but lay into it some and it wakes up very nicely. Only problem now is that from a dig on the street I am spinning the AWD through 1st gear. I have the tune setup to lockup the converter in 3rd and 4th under WOT which feels almost like 2 shifts back to back but when the converter locks the mph gets a very nice boost. I haven't had a chance to make a full 1/4 mile pull yet, but will try to make it back to the track in early March. Hoping I can get some traction with the 22's and see a time somewhere in the 12.6 or 12.5 range. Need to start looking at some 18" wheel and drag radial options I think.
Also made some transmission tune adjustments based on the Tuning Schools HpTuners manual and it appears to have resolved my shift point issues which have plagued the truck for the past month or two.
During normal driving with light throttle the truck feels like stock, but lay into it some and it wakes up very nicely. Only problem now is that from a dig on the street I am spinning the AWD through 1st gear. I have the tune setup to lockup the converter in 3rd and 4th under WOT which feels almost like 2 shifts back to back but when the converter locks the mph gets a very nice boost. I haven't had a chance to make a full 1/4 mile pull yet, but will try to make it back to the track in early March. Hoping I can get some traction with the 22's and see a time somewhere in the 12.6 or 12.5 range. Need to start looking at some 18" wheel and drag radial options I think.
Also made some transmission tune adjustments based on the Tuning Schools HpTuners manual and it appears to have resolved my shift point issues which have plagued the truck for the past month or two.
02-24-2012, 12:27 PM
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Next stage of the truck is finished up. Just got a 2600-2800 Circle D converter and billet flexplate installed last night (also found a failed rear main seal). VERY happy with the converter purchase though and recommend other GMT900 guys consider CircleD as well if looking for a converter.
During normal driving with light throttle the truck feels like stock, but lay into it some and it wakes up very nicely. Only problem now is that from a dig on the street I am spinning the AWD through 1st gear. I have the tune setup to lockup the converter in 3rd and 4th under WOT which feels almost like 2 shifts back to back but when the converter locks the mph gets a very nice boost. I haven't had a chance to make a full 1/4 mile pull yet, but will try to make it back to the track in early March. Hoping I can get some traction with the 22's and see a time somewhere in the 12.6 or 12.5 range. Need to start looking at some 18" wheel and drag radial options I think.
Also made some transmission tune adjustments based on the Tuning Schools HpTuners manual and it appears to have resolved my shift point issues which have plagued the truck for the past month or two.
During normal driving with light throttle the truck feels like stock, but lay into it some and it wakes up very nicely. Only problem now is that from a dig on the street I am spinning the AWD through 1st gear. I have the tune setup to lockup the converter in 3rd and 4th under WOT which feels almost like 2 shifts back to back but when the converter locks the mph gets a very nice boost. I haven't had a chance to make a full 1/4 mile pull yet, but will try to make it back to the track in early March. Hoping I can get some traction with the 22's and see a time somewhere in the 12.6 or 12.5 range. Need to start looking at some 18" wheel and drag radial options I think.
Also made some transmission tune adjustments based on the Tuning Schools HpTuners manual and it appears to have resolved my shift point issues which have plagued the truck for the past month or two.
02-24-2012, 01:37 PM
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Doubt it looks too impressive, but I'll see if I can get someone to help out with this. From inside the cab I can just feel it slipping the rears then catching as the fronts slips and back and forth. Kind of a pulsating type thing. Nothing with tire smoke and flames just yet.
02-24-2012, 01:44 PM
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Might be able to try to make it to the track tonight for some test and tune, but not too sure the times will be all that great with the 20mph headwind we'd have tonight. If so, I'll get some video of what I can.
02-24-2012, 01:50 PM
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02-24-2012, 02:53 PM
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Nice.. I just got my 278mm 3200ish circle D.
Not to hijack the thread but I have a quick question. Im getting my cam put in a week after I do my converter and doing all the tuning the day after the swap. Would it be ok/safe to drive softly for a week on that converter and the efi live tune thats already in my truck? (Not tuned for a converter)??
Not to hijack the thread but I have a quick question. Im getting my cam put in a week after I do my converter and doing all the tuning the day after the swap. Would it be ok/safe to drive softly for a week on that converter and the efi live tune thats already in my truck? (Not tuned for a converter)??
02-24-2012, 03:10 PM
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Nice.. I just got my 278mm 3200ish circle D.
Not to hijack the thread but I have a quick question. Im getting my cam put in a week after I do my converter and doing all the tuning the day after the swap. Would it be ok/safe to drive softly for a week on that converter and the efi live tune thats already in my truck? (Not tuned for a converter)??
Not to hijack the thread but I have a quick question. Im getting my cam put in a week after I do my converter and doing all the tuning the day after the swap. Would it be ok/safe to drive softly for a week on that converter and the efi live tune thats already in my truck? (Not tuned for a converter)??