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A Team Turbo

Jorge6.5 said:
So basically the extra volume of the intercooler and att being non gated cause there to be extreme lag?
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Where did anyone say there is extreme lag with the ATT. If there is any lag to the ATT I have not found it. Probably started by someone that doesn't own one. :agreed:
 
Slim Shady said:
Where did anyone say there is extreme lag with the ATT. If there is any lag to the ATT I have not found it. Probably started by someone that doesn't own one. :agreed:
Click to expand...

:agreed:

I have stated many times that I've not noticed any lag with my ATT.
 
I was simply asking if the non gated housing and intercooler together caused lag, extreme was the wrong word to use obviously.

If it performs just as well with the intercooler why remove it? Its only a benefit right?
 
1999gmc said:
View attachment 32648View attachment 32649View attachment 32650View attachment 32651View attachment 32652View attachment 32653
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:bling:
Finally, someone out there with a cleaner engine bay than mine. Well that ain't going to last, no sir...now where did I put those Q-Tips? :willynilly:

In all seriousness, it looks great and good on ya. We just had some wicked dust/ rain/snow/wind etc so I do need to get out there and work on it but with the new motor going in that is practically a "self licking ice cream cone." I'll be back up there in the win, place and show categories soon enough. :thumbsup:

Paul
 
Paveltolz said:
:bling:
Finally, someone out there with a cleaner engine bay than mine. Well that ain't going to last, no sir...now where did I put those Q-Tips? :willynilly:

In all seriousness, it looks great and good on ya. We just had some wicked dust/ rain/snow/wind etc so I do need to get out there and work on it but with the new motor going in that is practically a "self licking ice cream cone." I'll be back up there in the win, place and show categories soon enough. :thumbsup:

Paul
Click to expand...
Common now Paul You know mine is cleaner
 
Paveltolz said:
:bling:
Finally, someone out there with a cleaner engine bay than mine. Well that ain't going to last, no sir...now where did I put those Q-Tips? :willynilly:

In all seriousness, it looks great and good on ya. We just had some wicked dust/ rain/snow/wind etc so I do need to get out there and work on it but with the new motor going in that is practically a "self licking ice cream cone." I'll be back up there in the win, place and show categories soon enough. :thumbsup:

Paul
Click to expand...

It actually is dirty right now. The tubes are a lot cleaner after winter I take them off and polish them and the intercooler and steam clean the engine bay. Just waiting for the rain to be over. But thanks. I should get you some pics of the underside for you then. Zero leaks and the oil pan looks like it just left the GM factory.
 
1999GMC, do you have a lift of any kind on your truck? I remember your ride from Walt's place. I think it looks better for some reason.
 
sshewins said:
1999GMC, do you have a lift of any kind on your truck? I remember your ride from Walt's place. I think it looks better for some reason.
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No lift. I did turn the torsion bars up to raise it about a half inch and I am running 265/75R16 now. I used to have 285's on it before when you saw it probably.
 
The cab is almost as clean as the engine bay. :D It won't be that way for long with a 1 year old. :D

Paveltolz said:
:bling:
Finally, someone out there with a cleaner engine bay than mine. Well that ain't going to last, no sir...now where did I put those Q-Tips? :willynilly:

In all seriousness, it looks great and good on ya. We just had some wicked dust/ rain/snow/wind etc so I do need to get out there and work on it but with the new motor going in that is practically a "self licking ice cream cone." I'll be back up there in the win, place and show categories soon enough. :thumbsup:

Paul
Click to expand...
 
Rodd said:
The cab is almost as clean as the engine bay. :D It won't be that way for long with a 1 year old. :D
Click to expand...


Oh yes it will Rodd. She is not allowed to eat or drink other than water in my truck. I don't care if she is only 1 or not.:hihi::hihi::hihi:
 
Slim Shady said:
Where did anyone say there is extreme lag with the ATT. If there is any lag to the ATT I have not found it. Probably started by someone that doesn't own one. :agreed:
Click to expand...

I am not going to put the GM3 back on to get an exact measurement for my parking lot space example.
Fuel turned up on the 1993 4.10 rear end Turbo Master set at 12 PSI at 1000' altitude, creeps to 14 PSI at higher elevations:

GM3
Off hand if I stomp the throttle from a stop I will get say 3 parking lot spaces of black smoke before it clears up.
My understanding is the GM3 for whatever reason is the low engine RPM turbo vs. the higher numbered GM4, GM8's, etc.
The GM3 is, quite frankly, useless over 2200 RPM. Actually it chokes the engine on RPM alone with no throttle over 2200 RPM as it stays spooled up at 6 PSI.

ATT
Stomped is like 5-6 Parking lot spaces before the smoke clears.
I can release the throttle above 2200 RPM and the turbo unwinds from 15 PSI to 1-3 PSI, sometimes 0 PSI depending on RPM.

The engine RPM has to come up for boost on the ATT.
I can brake stall and get boost from the GM3, No so much from the ATT.

Cruising flat and level unloaded, no trailer or cargo, at 65.
The GM3 will be generating 6-14 PSI.
The ATT can be generating 0-3 PSI.

I am not throwing enough fuel at the engine to justify any boost flat and level.

If I stomp the throttle at 65 from no throttle:
The ATT has to spool up and will do so quickly.
The GM3 is already at full boost and, OOPS!, it just choked as I am at 2200 RPM. (Actually would go from 6-14 PSI nearly instantly and the wastegate pops open some.)

IMO a belt drive supercharger would be a better choice than a GM3. At least the ATT acts like a turbo not a belt drive supercharger. Belt drive superchargers unless clutched generate boost all the time regardless of throttle...

Vac systems can open the wastegate at cruise and drop the parasitic boost off. Can means I never observed them operate so I suggest it makes sense and is possible.
 
So I finally towed our toy hauler with the A team turbo. We went to Smith Valley, NV for a week. I took I-80 up through Donner and Reno and then down 395. I got to the first hill out of Auburn, CA and I thought OK, it is better than the GM 8, but was hoping for more. Got to Blue Canyon that is about 4-5 miles of 5-7% grades, thought it was about the same as with the GM 8. I got just past thye Yuba Gap exit and all of sudden I lost power, running rough, smoke, I was thinking ohhhhhhh crap. Pulled off to the side of the road and it would barely idle. Shut it off. Popped the hood. Had my wife turn on the key, and didn't hear a lift pump running. Opened the bleed on the F.F. and no fuel was coming out. All of a sudden lift pump made some gurgling noises and started working. Shut the hood and off we went to a Napa in Reno that had a lift pump in stock. Bought a lift pump and new relay and installed them in about 5 minutes in Napa's parking lot. Back on the road to Smith. Get to the campground shut my truck off and the lift pump keeps running. Pull out the new relay, pump stops. Install the old relay, pump runs with key on, turn the key off, pump stops. Pull the old relay, re-install the new one, pump starts running with the key off. So needless to say, the new relay sticks on. Fast forward a week later, load up to head home. Truck runs good, just thought the turbo would have more power on the hills. So on the way home I notice as I let off the throttle, the truck would accelerate. Got me to thinking, maybe lack of fuel. I only could get 6 PSI of boost in OD at 60 or 65 MPH. Would get 13-15 in 3rd. Today I go to work, put my fuel pressure gauge on it. KOEO I have 8 PSI. Idle 4.5-5 psi. Slight rev it drops to 3.5-4. I go drive it, under WOT it goes to 0 psi right before it shifts into 3rd. Before I did the feed the beast I checked pressure like this and I couldn't get it to drop below 3psi. So either the feed the beast definitely takes a lot more fuel, or the new lift pump is junk. My old lift pump had 146,000 miles on it.
 
Your tank sock is restricted. A plugged sock WILL cause a lift pump to loose prime and airlock. They then catch their prime later and start pumping. Seen it more than once. The Walbro's have a screen in them that is simpler to clean than the sock. I have even airlocked them. Without airleaks they simply can't pull fuel through a plugged tank sock. Diesel will evaporate in a vacuum... I use a fuel/vac gauge and I have seen a vacuum on my water drain port at times...

The 1993 lift pumps had the higher flow rates as I recall.

For a hot tune you may want more GPM than a Walbro can provide. But I can't back that suggestion up. I can say the Walbro's are way tougher than the stock pumps from what mine have seen... Questionable fuel is being polite.
 
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