Low Boost?
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Post Fiend
Joined: Jul 2005
Posts: 14,582
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From: 21791
Low Boost?
I dont know if it's just me, but my boost numbers don't seem as high as some of you guys here running DP Tuner tuning as well. On my 120 and 140agressive tunes, the most boost i can ever see is 23-24psi, that is in 3rd gear, from 2500-redline, i did it a few times and it always fluttered between 22-24. Today getting out on the highway with no traffic, i got into 3rd gear and wound it out to 3000 and then let out (thought i was taking off 
) I was in the 80econo setting and the boost just nudged to 21psi. And then one the way home from the girlfriend's house i was again coming the other way, and this time on 60tow (i love the shifting in that tune) i again wound it out in 3rd to 3200 ish and i could not get over 20psi in that setting. Is it the fact that my 1.15 and ww/ATS is just keeping my gauge lower than the rest of you guys? What are you DPtuners running in those aforementioned tunes, with whatever turbo setup?
) I was in the 80econo setting and the boost just nudged to 21psi. And then one the way home from the girlfriend's house i was again coming the other way, and this time on 60tow (i love the shifting in that tune) i again wound it out in 3rd to 3200 ish and i could not get over 20psi in that setting. Is it the fact that my 1.15 and ww/ATS is just keeping my gauge lower than the rest of you guys? What are you DPtuners running in those aforementioned tunes, with whatever turbo setup?
Lead Driver
Joined: Oct 2004
Posts: 7,413
Likes: 1
From: Columbia, MO
Your numbers are a little lower than mine. I hit about 26-27 psi on my 100 setting. My guess is the WW is causing the lower boost numbers, compared to mine.
I've always noticed a little lower boost numbers than everyone else, and no doubt the larger housing is causing that. Remember though, the larger housing is flowing more air out, and the lower restriction on the exhaust side will result in lower boost numbers overall. That doesn't mean less HP though.
I've always noticed a little lower boost numbers than everyone else, and no doubt the larger housing is causing that. Remember though, the larger housing is flowing more air out, and the lower restriction on the exhaust side will result in lower boost numbers overall. That doesn't mean less HP though.
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Post Fiend
Joined: Jul 2005
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From: 21791
Yes as a matter of fact i just bought a stock compressor wheel off of Rons Turbo Service on ebay, and im going to try putting the stock one back. Logic says it flows more air, and i have had enough of this obnoxious whistle, especially if i am driving to Arkansas 
Elder User
Joined: Oct 2005
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From: Cincy OH
well, Kris your crazy to remove that $400 ATS housing. I run the true van with WW and ATS and hit 23-24 lbs no problem, not even full throttle. Most I can see at full wound-out throttle is 26-27 lbs. Barely getting 21lbs is a problem. I can hit that with a quick slap of the pedal in even the 80hp setting. All your boots are tight??
Why would you get rid of the ATS? That thing is great! You can still surge some w/ the WW, and the noise is also a real plus!?
EDIT: okay, misread you. You're wanting to get rid of the WW, I see. I don't know, I would look for other problems as I have nearly same deal as you and see higher numbers
Why would you get rid of the ATS? That thing is great! You can still surge some w/ the WW, and the noise is also a real plus!?
EDIT: okay, misread you. You're wanting to get rid of the WW, I see. I don't know, I would look for other problems as I have nearly same deal as you and see higher numbers
Last edited by yellow401; Mar 4, 2007 at 11:09 PM.
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Post Fiend
Joined: Jul 2005
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From: 21791
Yes, i am crazy, but not like that 
Keeping the ATS, running a stock compressor wheel.
Like Jtharvey. The only reason i ran the WW with the ATS was because i was fascinated with the whistle. For driving around town and stuff its not bad, only hearing the whistle for a few seconds here and there, it sounds great. But hearing the piercing whistle at 3-4psi crusing a highway at 75mph, that is what i cannot stand. I rode with Jeremy and i know his turbo is quieter. Plus i know the ATS cures surge, and the WW actually hurts performance because it doesnt flow as much air. So i am hoping for more boost, and (you thought you would never hear this from me, huh) a quieter turbo. I dont want to listen to that for 2500 some miles!
Keeping the ATS, running a stock compressor wheel.
Like Jtharvey. The only reason i ran the WW with the ATS was because i was fascinated with the whistle. For driving around town and stuff its not bad, only hearing the whistle for a few seconds here and there, it sounds great. But hearing the piercing whistle at 3-4psi crusing a highway at 75mph, that is what i cannot stand. I rode with Jeremy and i know his turbo is quieter. Plus i know the ATS cures surge, and the WW actually hurts performance because it doesnt flow as much air. So i am hoping for more boost, and (you thought you would never hear this from me, huh) a quieter turbo. I dont want to listen to that for 2500 some miles!
Lead Driver
Joined: Oct 2004
Posts: 7,413
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From: Columbia, MO
I've got plenty of whistle, well for me anyway, and was always amazed that you wanted more.
Other than loose boots, how about a pre-turbo exhaust leak causing less drive pressure. A leak in the up-pipes would certianly cause some low boost.
A bit off topic - have you scheduled a trip to Lead Hill and I missed it?
Other than loose boots, how about a pre-turbo exhaust leak causing less drive pressure. A leak in the up-pipes would certianly cause some low boost.
A bit off topic - have you scheduled a trip to Lead Hill and I missed it?
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Post Fiend
Joined: Jul 2005
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From: 21791
No, i havent scheduled the date. But how long do you think the waiting period would be if i told him ASA(feasibly)P? I don't have my lift sold yet, but the thing is im inbetween a rock and a hard place, as i have $1500 in taxes to pay by 4/15, or, spend $1000 or so in an IRA and earn interest on that, and only pay about $800 in taxes. I want $800 for my lift, plus im getting some more money in. I dont know when i could swing $4200 and all of that other stuff. But i don't want to call and schedule the install, and then when the time comes, not have the money because i had to pay taxes. I always get screwed over like that.
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Elder User
Joined: Oct 2005
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From: Cincy OH
Okay, i got ya. Hopefully it will help you. I have come to ignore the whistle when I want to, and play with at other times.
Do you have a date for BTS yet??? I love that place! Stop by and pick me up on your way down! Seriously, you will love the BTS! I am one tuff cookie to please, but I have been completely pleased and them some with the BTS. Gives me confidence to do anything I want with the truck. I hold back for nothing, at least not for fear of the tranny.
Do you have a date for BTS yet??? I love that place! Stop by and pick me up on your way down! Seriously, you will love the BTS! I am one tuff cookie to please, but I have been completely pleased and them some with the BTS. Gives me confidence to do anything I want with the truck. I hold back for nothing, at least not for fear of the tranny.
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Post Fiend
Joined: Jul 2005
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From: 21791
Originally Posted by yellow401
Gives me confidence to do anything I want with the truck. I hold back for nothing, at least not for fear of the tranny.
Lead Driver
Joined: Oct 2004
Posts: 7,413
Likes: 1
From: Columbia, MO
From what I've heard, Brian is about 3 week out right now. When I scheduled mine, I was 4-5 weeks out. I would imagine that he get's busier during the summer though.
If you get the chance to stop through Columbia, that would be awesome. But, it would be several hours out of your way. We could have some fun though, especially if you picked up Jason and brought him with you. That could make the drive a lot more fun, and driving duties could be switched off.
If you get the chance to stop through Columbia, that would be awesome. But, it would be several hours out of your way. We could have some fun though, especially if you picked up Jason and brought him with you. That could make the drive a lot more fun, and driving duties could be switched off.
Postmaster
Joined: Jun 2006
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From: Fulltime RVer
Originally Posted by strokin_it7.3
...the most boost i can ever see is 23-24psi...
Elder User
Joined: Jul 2005
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From: NorCal
Kris, as you know I also have the ATS & WW combo but with the stock wastegated .84 turbine. On the 80e tune I see 24 psi from 2300 RPM+ and on the 120 Race I see mostly 25-26 psi sometimes peaking to 27 during WOT shifts. That's with the red line to the wastegate disconnected.
The wicked wheel didn't effect my boost number much, but to be honest my stock turbo wheel wasn't in that great of shape when I removed it (Small chips on the fins).
And, I know what you mean by the whistle from the ATS & WW combo. It's cool to show off but on long trips it's not that fun. I hauled back three ATVs yesterday (One in bed, two on trailer) and had a strong headwind coming back home, boost was right around 7-9 psi at 55-60 MPH and the whistle grew old pretty quick.
The wicked wheel didn't effect my boost number much, but to be honest my stock turbo wheel wasn't in that great of shape when I removed it (Small chips on the fins).
And, I know what you mean by the whistle from the ATS & WW combo. It's cool to show off but on long trips it's not that fun. I hauled back three ATVs yesterday (One in bed, two on trailer) and had a strong headwind coming back home, boost was right around 7-9 psi at 55-60 MPH and the whistle grew old pretty quick.
Posting Guru
Joined: Apr 2004
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From: AZ
I looked into the ww vs 00+ wheel for a replacement for my 97 (has ww design). I found that the ww has 10 fins with half of them only going half the length. The other stock wheel has 9 full length fins. I would think that the stock 9 fin wheel has more surface area, but does it actually flow more air than the 10 fin ww?
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Post Fiend
Joined: Jul 2005
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From: 21791
Originally Posted by ernesteugene
Since no one else has mentioned your wastegate blowing open, I assume there's a good reason, like maybe your special turbo doesn't have one? Otherwise, a strong plastic zip tie to make sure it stays closed and a quick test run might shed some light.
Ha, yes, my special turbo does not have one. I run a 1.15 A/R non-wastegated housing that is so efficient, it does not need a wastegate do dump excess drive pressure.
As far as the wheel, the WW has 5 tall blades, and 5 short blades. The 5 tall blades are steeper pitched (stood over farther) and the addition of the 5 smaller blades is not enough to equal that of 4 blades from the stock compressor wheel. The surging problem is not the fault of the wheel, it is the fault of the compressor housing. It's just to fix it, it cost over 600% more to fix it correctly ($400) instead of masking the problem with a $60 compressor wheel that is designed to lower performance.
And David T, That small turbine must really cork up the engine running highway speeds. Do you know what boost you run at 75-80mph, unloaded? I was crusing most of the way with the boost gauge not even registering, however i could hear the whistle. On the inclines it got 3-4 psi, but nover over 5-6 on the steepest inclines or passing cars.
Postmaster
Joined: Jul 2006
Posts: 4,993
Likes: 2
From: Bend, OR
Most of your lower boost is due to the better drive pressures of the 1.15 housing. But I would bet that you have a drive pressure leak somewhere. Also look at your clamps, this happened to me just a few weeks ago. The clamp was broken but in a weird way, you would clamp it down and it would feel tight. But the threads where all bunched up in the clamp area. Replaced ALL the cheap plumbling store clamps with good 3/4" wide T bolt clamps and picked up 8#'s of boost... Yes that is correct 8#'s!!! went from 27-30 to 38#'s!!!