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ATT Fun Video

6.5L

6.5L

Old Iron Runner
Messages
1,177
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433
Location
Northwest Wyoming
Some people were asking how much smoke I was getting with my A-Team Turbo. Here is a video. It smokes so bad at the start because I was holding the brakes slightly to build boost in the turbo before I started grabbing gears.


[video=youtube;cQPcTydnh_4]http://www.youtube.com/watch?v=cQPcTydnh_4[/video]
 
Interesting. I'm curious if other ATT owners would care to post their observations on smoke output through the gears and altitudes.
I'm at 4600' with a DB4 and a Max E Tork Economy tune and experienced similar output on accelerations that could be considered 'harder' than 'normal.'
 
Hmm I Get very little smoke with the HX40II, just when you romp on it nothing like in that Video, whats your EGTs? seems like alot of fuel going out the pipe
 
I noted that the DB2 had been turned up 1/4 turn. Not being familiar with that IP, I have no idea what changes that would create in fuel delivery. New learning curve ahead.
 
Altitude is at 3600-3700ft. I am not sure the exact measurements of fuel delivery so maybe someone else knows the specs on that. Just a mechanical injection pump. And although there was a bit of smoke, EGT's managed to creep up to between 1000* and 1100*, but it was being pushed real hard, wide open throttle the entire way. And I don't mind the idea of the HX, but I want a non wastegated turbo that runs low boost and moves more air like the ATT. It leaves a lot of room for more power. I see with the HX that you guys are already backing the wastegates down to keep boost in check. I would much rather run 10psi like I am now and clean up 90% of that fuel and have room for another 10psi before I back it off than have a turbo I already have to wastegate early. Not trying to start shit. Just my two cents. And also yeah, fuel may be going through the pipe under extreme situations, but normal driving produces no smoke and I am getting 19-20mpg highway on winter diesel cruising at 2500rpm and 4:10 rear end gearing. With my gearing, the ATT suits me perfect.
 
And also this video was unloaded. With a load she smokes a bit starting out but I run about 13-14psi with a 8000lb trailer and it doesn't smoke at all. It wasn't designed to be super fast, it was designed for towing, which it performs amazing at. It could hold pulling that weight all day. Just to me it seems the HX is more of a street turbo while the ATT is for pulling. I am not sure the results the guys with the HX are at towing since I haven't really been keeping up on it. Oh well. The turbo works for me just fine.
 
Hold on there 6.5 I was in now way putting down the ATeam, or pumping Up the HX, I was more looking at you fuel delivery and thinking that might need to be toned down some, But I think the Ateam doesnt spool up as quick and that may account for the smoke, Im am never gonna start anything or Bash any other Members accomplishments, I hope that clears things up
 
I didn't take it as any bashing. Sorry if it seemed that way. College has got me cranky today. But for cruising at 2500rpm highway, having a turbo with little back pressure definately helps my mileage with the 4:10's. I forgot to mentioned I also just dropped in a set of 2300psi pop Bosch injectors. I have been trying to figure out how to update my sig to show it. Finally got it I think. Hope it shows up. The ATT has got me at a disadvantage having a 5 speed since I loose that boost between shifts and being at altitude doesn't help either. But that is all unloaded. With a load, the turbo spools perfect and keeps EGT's well in check. And fuel delivery I think is ok. Yeah, it smokes, but that is wide open throttle unloaded pushing hard. Like I said, my mileage is hard to argue with right now. I doubt I am gonna touch fueling any in the future. I plan on running water/meth this coming summer which should clear up any remaining smoke that I produce. Sorry if I came across as snobby. It wasn't my intention at all.
 
The important thing is that it is working for you the way you want it to. I wasn't trying to be critical, just trying to figure things out, my old head doesn't seem to always hit on all eight and so I ask questions.

Good luck in school and hang in there, summer's coming.
 
Seems like alot of smoke, even at full boost.

I have that same pump(screw in the whole way), marine injectors, and a holset. I get a puff of smoke on spool, otherwise whistle clean.

Maybe it wasn't at full boost in the video?
 
Possible there is an air leak? Mine is auto so after the initial black cloud there is no smoke. I let off at 18 psi boost.
 
I used to get lots of smoke off the line but I had an exhaust leak on the drivers side at the donut. Since that has been fixed boost comes up incredibly quicker than before the fix. Now I get minimal smoke. http://s130.photobucket.com/albums/p242/edzzed/?action=view&current=ztruck012.mp4 on this vid if you stop it when you see the egt gauge is shows the temp to be almost 1100 and that's unloaded http://s130.photobucket.com/albums/p242/edzzed/?action=view&current=ztruck011.mp4 . I haven't done any run to see what egt's are now that the exhaust is fixed. And turbo lag is minimal now, in fact it's not much different that the gm8
 
I've checked for exhaust leaks. I have none. I may switch out the clamps holding the boot between the turbo and manifold here soon. I am thinking it may leak from there. I have some oil leaking from there onto my upper intake piece. I assume if oil can get through, than boost can too. I have some heavy duty clamps but in all honesty I am worried about clamping so hard it cracks the turbine housing or upper intake piece. Also I need to replace my CDR. I assume it is well beyond it's service limit. They are kinda pricey though, so as long as it runs I won't mess with it until summer when I have a steady income.
 
just curious what rpm your shifting at? Also don't bother buying a new cdr just clean the old one, the diaphram inside it is impervious to anything I tried on it.
 
I start in 2nd gear and shift at 3800rpm. Then in 3rd I shift at 3800rpm. Then in 4th I shift at 3500rpm, then it carries into 5th. And what would you recommend to clean the CDR?
 
GUYS just so everyone is clear, there are / is some testing going on. This housing is the larger exhaust housing and is not the normal A-team exhaust housing. So that may account for some of the smoke (which by the way is not much in my opinion). We are dealing with a mechanical pump and there is no altitude compensation, nor is there altitude compensation in the electronic DS4 pump. So that being said unless fuel is adjusted anything can be made to smoke especially a manual transmission truck at pedal to the floor.

Automatics tend to smoke much less than the manual transmissions, so we should really take into consideration the whole picture when throwing around that mine smokes less than yours. We are already at 3600 to 3700 feet where most of you are at sea level, not Paveltoz. And I am not sure how much smoke is cleared up by having different smaller turbine housings, 14 cm versus the larger A-Team Turbo. So there are comparison variations that really need to be noted when making the comparisons to spool time how much smoke mine clears and similar comparisons.

As far as what 6.5 said I agree that the A-team Turbo boost differently, it boosts by heat rather than the exhaust pressure. from my understanding there has not been any comparison of drive pressures on the HX knock off and A-Team. Those would be nice for comparisons and once again two vastly different exhaust housings, and not the normal A-team Housing, just something to test. So lets look at this as an experiment and if comparisons are to be made lets do it in a manner that lays out all the facts for those that may not be in the know. Thanks Slim
 
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