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ATT Turbo specs

Weasel

Member
Messages
36
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7
Location
North Idaho
Do any of you that run the ATT turbo have the specs for the unit? I understand the back pressure is light and the boost is not excessive.
So I would think the engine runs cooler under load. I my have too large xover pipe (2 1/2") for a ATT. Truck has a 3K lbs. 11' camper and when I tow a trailer with two quads the truck doesn't like 6% grades. Like many, not working under these hard times. Trying to get up the funds for a turbo change and get rid of the gm-3.

So if anyone has a used ATT unit for sale, please let me know.

Thank you for any info
 
You are correct in your assumptions. The GMx has a similar drive ratio to about 6 PSI. The ATT Drive ratio stays the same while the GMx goes to like 1.5 to 1 keeping heat in the engine and killing any power over 2200 RPM. MPG also suffers with the GMx more than the ATT as you load it with a trailer etc.

You should have a 4" exaust with a better turbo.

You can wind the boost up on the ATT with enough fuel in a tune.

ATT top, GM3 on the bottom.

GM3 vs ATT.jpg
 
Thank you both for the info.

Do you know who is selling the ATT? Maybe a phone number or e-mail address.
Thanks again

Weasel
 
TD posted this Data set a while back.
View attachment A-Team turbo with IC & without.pdf
ATT w/ and without Intercooler data sets. Two pages.
Not sure how much it will help with the original question but there are back pressure numbers etc.
I don't know what the first page's data set is listed against, ATT, GM or what.
Second page has the ATT #s with and without the Intercooler being run.
 
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