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ATT installation, trials, tribulation, success

Amazing how different it made the truck. It rides different, feels different, everything. I'm glad I didn't lose the turbo whistle, and the v8 rumble is bit more noticeable now. Standing by the tailpipe exit at idle, if you try to ignore the diesel noise coming from up front, the noise coming out of the pipe sounds something like a 454.
I can see where the fuel mileage comes from. It's running lower rpms and boost numbers than I always did.
Did you notice any increase in the black smoke?
 
FOr low RPM feel I wonder if it would make plowing feel like more work, or if you would just get use to it in a few weeks just like you do larger tires.

I also wonder if the computer makes any sort of changes over time.
 
Detroit Dan said:
Amazing how different it made the truck. It rides different, feels different, everything. I'm glad I didn't lose the turbo whistle, and the v8 rumble is bit more noticeable now. Standing by the tailpipe exit at idle, if you try to ignore the diesel noise coming from up front, the noise coming out of the pipe sounds something like a 454.
I can see where the fuel mileage comes from. It's running lower rpms and boost numbers than I always did.
Did you notice any increase in the black smoke?
Click to expand...

Detroit Dan

Do you have a reflash and have you set your TDC offset to -1.50 to -1.94? These will eliminate the the lower end smoke. The stock chips will smoke without the TDC set higher, and you may not get the full boost (15 psi) or a little more without a reflash.

The stock programing will net you 63 MM cubed fuel max and limit boost to about 10 psi max. The reflash chips will net you a lot more fuel, I know Heath has a chip that he has tweaked for the ATT, Oregon Horse Tug has been running it and maybe he could chime in , I know he ran a stock chip at first and could give us some before and after numbers from a stock chip to the Heath reflash.

Also give your truck time to relearn the fuel curve it will need: it should improve after a week or so.
 
Matt Bachand said:
FOr low RPM feel I wonder if it would make plowing feel like more work, or if you would just get use to it in a few weeks just like you do larger tires.

I also wonder if the computer makes any sort of changes over time.
Click to expand...


Low rpm torque should go up, the computer does relearn to what extent I can't say.
 
Slim Shady said:
Detroit Dan

Do you have a reflash and have you set your TDC offset to -1.50 to -1.94? These will eliminate the the lower end smoke. The stock chips will smoke without the TDC set higher, and you may not get the full boost (15 psi) or a little more without a reflash.

The stock programing will net you 63 MM cubed fuel max and limit boost to about 10 psi max. The reflash chips will net you a lot more fuel, I know Heath has a chip that he has tweaked for the ATT, Oregon Horse Tug has been running it and maybe he could chime in , I know he ran a stock chip at first and could give us some before and after numbers from a stock chip to the Heath reflash.

Also give your truck time to relearn the fuel curve it will need: it should improve after a week or so.
Click to expand...

Stock computer and TDC. I was worried I'd be starving for fuel but apparently not, if I can push that much smoke. I'd love to get a reflash but I decided on the ATT instead, and it will be awhile before I can scrape up any more money. I'll let it relearn, only driven it twice now.
 
Detroit Dan said:
Stock computer and TDC. I was worried I'd be starving for fuel but apparently not, if I can push that much smoke. I'd love to get a reflash but I decided on the ATT instead, and it will be awhile before I can scrape up any more money. I'll let it relearn, only driven it twice now.
Click to expand...

Set your TDC to the negative 1.50 and that will help a great deal. You will clear up most of the black smoke and that will also give you a little better lower end performance.

The chip can wait you will use all of the fuel you can give it. The TDC offset will be the big help with a stock ECM.
 
I have the stock for 97 airbox, I forgot to mention while I had it out I cut off the silencer and put the end of it in the hole backwards. Maybe that's why I've got so much whistle. I can actually detect whistle at idle.
Other thing I noticed is the truck is much quieter now. I parked it at 3 am this morning, left it running on the remote starter (turbo cooldown) and walked up to the house. Normally it would sound real loud, but it was noticeably quieter. Weird.
I looked thru the TDC sticky, quickly got a headache from all the math. Didn't really see any instructions I could comprehend. I guess it must be pretty complicated then. I'll have to find a shop that can do it, looks to be beyond my modest capabilites.
 
Dan,

doing TDCOffset is not an engineer privilege, but you'll need a scanner (Tech2 or a laptop with AE or other software capable) and special IP tools.
I just did the one from my father in law this morning (after I finish kidding him ):h )

Rotating slightly the pump to driver side increases TDCo, to the passenger side decreases it.

BTW, mine is not whistling strong either...
 
Where do you live Detroit Dan? I remember someone in Mass offering to help you install your turbo, and that would be one great offer if you live in Detroit.

I also need to do -1.5 offset but have no scanner, and do not want to do it without.

Perhaps if all of us Massholes can do it together some how, make a day and save some pennies.
 
Setting the TDC is not that big an issue. The benefit is worth the effort.
 
guybb3 said:
If we could work that out, I would be in for that, Matt.
Click to expand...

Your thread, so its not hijacking.......


So what we need now is to find out who else is interested, and a scanner that will read these, and any specialty tools requierd.

Hope we're all OBD2.

perhaps someone can chime in on exact specialty tool if any required. And if removing intake is recommended for ease, thus requiring gaskets.
 
Matt,

you will need :


Have fun ;)
 
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