Good song
What did you do to your NNBS GMT900 Tahoe/Yukon Today?
- Thread starter phattyford
- Start date
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Runfor5
Member
Aaaaand w're road-worthy again!!! Got front diff, crossmember, and CV axles installed this morning. My initial thoughts, hopefully to-be-addressed in a revised tune once I can data log next week:
- somewhat rough idle when coming to a stop after driving (not an issue when I just had it idling in garage a few times after buttoning up the motor);
- hesitation upon initial take off. Idk if this is the new cam itself or tuning, but it feels like you have to give it some gas to get going;
- transmission is clunky when coming to a stop from say, 3rd->1st. The trans has always been kinda 'dumb' IMO but I wonder if the firmer shift points are accentuating the general sloppiness of the trans itself.
- somewhat rough idle when coming to a stop after driving (not an issue when I just had it idling in garage a few times after buttoning up the motor);
- hesitation upon initial take off. Idk if this is the new cam itself or tuning, but it feels like you have to give it some gas to get going;
- transmission is clunky when coming to a stop from say, 3rd->1st. The trans has always been kinda 'dumb' IMO but I wonder if the firmer shift points are accentuating the general sloppiness of the trans itself.
Charlie207
Full Access Member
After actually driving around for a bit to log some data the muffler that was in the exhaust system was deemed too small.
It was hilariously loud and fun, but I decided to throw the large AP Racing SS muffler back in. (Same thing as a Magnaflow). It's more tame and doesn't bark nearly as much. The other nice thing is the lack of drone. I suspect the shape of that 3rd cat was causing some weird harmonics in the past.
Cruising at 55mph on relatively flat roads showed 22.5mpg.
It was hilariously loud and fun, but I decided to throw the large AP Racing SS muffler back in. (Same thing as a Magnaflow). It's more tame and doesn't bark nearly as much. The other nice thing is the lack of drone. I suspect the shape of that 3rd cat was causing some weird harmonics in the past.
Cruising at 55mph on relatively flat roads showed 22.5mpg.
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Charlie207
Full Access Member
Does it surge as you come to a stop, and keep revving at a standstill?
mikez71
Full Access Member
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Test fit the '15-'20 skidplate.. one hole needs slotted and one corner needs flattened and hole drilled.. Fits like a glove!
easy enough, I think when I test fitted mine it was the other way around gmt900 on a K2
Charlie207
Full Access Member
Where'd you find that?
mikez71
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Oh he just lowered his price! I paid $134, now he has a couple left at $121.
Other sellers seemed more expensive so idk if there's cheaper, but plenty to be found.
GM part # 23135960
Other sellers seemed more expensive so idk if there's cheaper, but plenty to be found.
GM part # 23135960
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Charlie207
Full Access Member
Ordered!
I spent an hour wrapping the aluminum intake tube with some fancy gold-colored aluminum tape. I'm curious if it'll help any of those under hood temps....can't hurt.
I also relocated my oil catch can down to the accessory bracket. Had to make a little bracket, and one of the bolts snapped off as I was tightening it, but it's solid. I need to button a couple things up, but had to run to an open house. We're putting in an offer, so fingers crossed.
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Charlie207
Full Access Member
How are you gonna deal with that one corner?
Runfor5
Member
Driving more yesterday and today, the downshifting is super clunky and rough - to the point I will prbly have them revert the trans tuning to my prior stock file. The cam is not significantly different than the OEM one so really no need for the trans to be tuned to start with.
As for your comment here if that's not helpful, ha, I wouldn't say it surges it's just clunky and slow to downshift. I think the idle needs another ~50 rpm into it or so. Perhaps that would address the hesitation upon take-off too. Are you getting at something else potentially that I should keep in mind / think through?
Hammer and drill baby, hammer and drill….
BFH, that's not cast aluminum that was bent by a machine, it will bend back, small sledge and a anvil will work.
you would be surprised what a monkey wrench can do
Charlie207
Full Access Member
Yeah ok. That works, for some reason I was thinking it was cast, and was worried about cracking. I can certainly heat it up and squash it with my 4lb. thumb-detector.
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New fogs that are the same 6000k or whatever color the LED projector bulbs are.
there is a family owned hardware store & full machine & fabrication shop here in town every time I go in there I drool a bit, lol
man the stuff you could make with the right equipment.....
man the stuff you could make with the right equipment.....
kbuskill
***CAUTION*** I do my own stunts!
Did stuff, including dual rear shocks if anyone is interested...
www.tahoeyukonforum.com
Kbuskill's 2008 Burb LTZ "MOD" Thread
Yeah, I saw those. I may get one and try my hand at it now that the old one is off the truck. My concern with never having done one was being rushed and it not turning out right and then I would have wasted more time/money. I may get one and if it turns out good just keep the old wheel as a...
www.tahoeyukonforum.com
Tonyrodz
Resident Resident
Another Jerseyan!
