... looks like the 38r is in my future.
Turbo Upgrade Help
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Fleet Mechanic
Joined: Oct 2010
Posts: 1,997
Likes: 206
From: South Eastern Michigan
Just asking about a follow up from CC if you did the mod?
In light of my reading about the 38r I'd like to know about the whistle/whine of the turbo at towing speeds (65-70mph). I generally tow from 7K up and I'm not at all displeased with the performance of the stock turbo but getting close to rebuild time (144K).
For those who tow on a regular basis using the 38r I'd love to hear from y'all about the upgrade overall... pro's and con's.
In light of my reading about the 38r I'd like to know about the whistle/whine of the turbo at towing speeds (65-70mph). I generally tow from 7K up and I'm not at all displeased with the performance of the stock turbo but getting close to rebuild time (144K).
For those who tow on a regular basis using the 38r I'd love to hear from y'all about the upgrade overall... pro's and con's.
As for performance, I agree, the stock turbo seems to do the job just fine. The only issue I have is around 9K lbs going uphill above 60, the turbo cavitates and I lose power/speed. The answer was a wicked wheel ('99 style). I decided to rebuild instead of just changing the wheel. I have just over 200k. The new center was around 500 clams whereas the 38r was north of 1300. I have a good friend that will help me not 'F' up the build. I'll try to get some pics and post my findings and tips.
Logistics Pro
Joined: Jan 2014
Posts: 3,595
Likes: 17
Just asking about a follow up from CC if you did the mod?
In light of my reading about the 38r I'd like to know about the whistle/whine of the turbo at towing speeds (65-70mph). I generally tow from 7K up and I'm not at all displeased with the performance of the stock turbo but getting close to rebuild time (144K).
For those who tow on a regular basis using the 38r I'd love to hear from y'all about the upgrade overall... pro's and con's.
In light of my reading about the 38r I'd like to know about the whistle/whine of the turbo at towing speeds (65-70mph). I generally tow from 7K up and I'm not at all displeased with the performance of the stock turbo but getting close to rebuild time (144K).
For those who tow on a regular basis using the 38r I'd love to hear from y'all about the upgrade overall... pro's and con's.
I've routinely towed around 6800-7500 pounds shuffling the Chevelle around for various work and helping friends with larger items to be moved. Granted I have tunes and bigger injectors, but it goes better than it ever did on big sticks, tunes, and stock turbo. EGT's are lower, it lights off in a more linear fashion, and the power delivery is smoother as well.
The whistle is obvious in mine, however I have an open element intake which makes things louder as here's no airbox to muffle the sound. I got a little annoyed with it after a week but then it just blended into the background and I barely notice it. Having an airbox or otherwise shielded intake would help keep the noise down substantially more than mine.
Here's a short video of mine in a half throttle pull in a hot tune with the window open halfway. More spool noise than a daily tune due to extra fuel delivery to spool faster, so keep in mind stock applications won't be this aggressive in sound levels.
Lead Driver
Joined: Jul 2013
Posts: 9,266
Likes: 151
From: In the field...
This is a stock tune, window up, 38R, billet wheel, 6637.
Not the best audio because it is being picked up by a mic on the glasses I am wearing.
https://vimeo.com/114495329
Not the best audio because it is being picked up by a mic on the glasses I am wearing.
https://vimeo.com/114495329
Super Moderator
Joined: May 2004
Posts: 29,380
Likes: 118
From: Central Coast of CA
In light of my reading about the 38r I'd like to know about the whistle/whine of the turbo at towing speeds (65-70mph). I generally tow from 7K up and I'm not at all displeased with the performance of the stock turbo but getting close to rebuild time (144K).
For those who tow on a regular basis using the 38r I'd love to hear from y'all about the upgrade overall... pro's and con's.
For those who tow on a regular basis using the 38r I'd love to hear from y'all about the upgrade overall... pro's and con's.
I've never had a problem with any turbo, and honestly, I do not hear a whistle whine, but I'm really used to my truck so I probably have trained myself not to hear it. It's just normal engine noise to me.
I can make the supercharger on my L SCREAM, but the 38R's are quiet if you ask me.
Yes, open air filter intake/elements on all three rigs.
Stewart
5th Wheeling
Joined: Jan 2014
Posts: 30
Likes: 0
From: NorCal
I too am thinking about upgrading my turbo to the 38r. I am hoping to decrease my EGT's when pulling my toy hauler. Is it desirable to put a Wicked Wheel 2 in the 38r, or is the WW2 more of a solution for the stock turbo?
Logistics Pro
Joined: Jan 2014
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It'll benefit either of them honestly. Less mass is less mass, improved blade designs etc.
There's been rumblings of a new player in the game, the KC38R which is supposedly better than the GTP38R, rebuildable, bigger housing, etc and still offers drop in installation.
I don't know anyone personally that runs one, seen a lot of Internet talk and users but nothing I feel confident in. I would personally stock to the GTP38R and billet wheel, been around longer and a strong reliability rate. Seen several accounts of KC's blowing up already and they're fairly new. Warranty covered them, but still....
There's been rumblings of a new player in the game, the KC38R which is supposedly better than the GTP38R, rebuildable, bigger housing, etc and still offers drop in installation.
I don't know anyone personally that runs one, seen a lot of Internet talk and users but nothing I feel confident in. I would personally stock to the GTP38R and billet wheel, been around longer and a strong reliability rate. Seen several accounts of KC's blowing up already and they're fairly new. Warranty covered them, but still....
Super Moderator
Joined: May 2004
Posts: 29,380
Likes: 118
From: Central Coast of CA
Seen several accounts of KC's blowing up already and they're fairly new. Warranty covered them, but still....
I have heard about some 38R's that bit the dust after upgrading to a better performance wheel though, and that's why I won't mod mine.
Stewart
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Logistics Pro
Joined: Jan 2014
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No links as the Internet side is primarily the launch info and testing from one guy. The rest is all FB page stuff.
The reason the billets tend to kill the 38R is the lack of a torque spec from what I've seen. Seeing that they're ball bearings, they don't take side loading very well. It's the whole reason I didn't install it on Cornelius's brand new 38R months ago. You didn't have one, Razzi didn't, Pocket didn't... Couldn't find one anywhere.
The reason the billets tend to kill the 38R is the lack of a torque spec from what I've seen. Seeing that they're ball bearings, they don't take side loading very well. It's the whole reason I didn't install it on Cornelius's brand new 38R months ago. You didn't have one, Razzi didn't, Pocket didn't... Couldn't find one anywhere.
Super Moderator
Joined: May 2004
Posts: 29,380
Likes: 118
From: Central Coast of CA
Ironically however, it was because I decided against the wheel that made the KC catch my eye. I haven't really looked into it yet, just saw that it is supposedly a bit better than the 38R and rebuildable too.
Stewart
Logistics Pro
Joined: Jan 2014
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I haven't followed the problem because I didn't care if I knew the info once I decided I wasn't gonna do the wheel upgrade.
Ironically however, it was because I decided against the wheel that made the KC catch my eye. I haven't really looked into it yet, just saw that it is supposedly a bit better than the 38R and rebuildable too.
Stewart
Ironically however, it was because I decided against the wheel that made the KC catch my eye. I haven't really looked into it yet, just saw that it is supposedly a bit better than the 38R and rebuildable too.
Stewart
Logistics Pro
Joined: Jan 2014
Posts: 3,595
Likes: 17
Some advertisement info:
Rebuild able Dual Ball bearing turbo for quick spool up and reliability
Upgraded Billet 6x6 dual plane 66x93 compressor wheel
4” ported compressor cover with anti-surge ring
Billet Big Head Wastegate actuator for quicker spool and elevated boost control
Larger 76x70 high flow turbine wheel to increase flow through the turbine housing
High flow non-ebpv outlet flange included with every turbo. This eliminates the ebpv butterfly valve to increase flow and decrease egts
This turbo runs well up to about 250/100s
Awesome turbo to tow with on smaller injectors
Rebuild able Dual Ball bearing turbo for quick spool up and reliability
Upgraded Billet 6x6 dual plane 66x93 compressor wheel
4” ported compressor cover with anti-surge ring
Billet Big Head Wastegate actuator for quicker spool and elevated boost control
Larger 76x70 high flow turbine wheel to increase flow through the turbine housing
High flow non-ebpv outlet flange included with every turbo. This eliminates the ebpv butterfly valve to increase flow and decrease egts
This turbo runs well up to about 250/100s
Awesome turbo to tow with on smaller injectors
Thread Starter
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Fleet Mechanic
Joined: Oct 2010
Posts: 1,997
Likes: 206
From: South Eastern Michigan
Follow up: I did the rebuild with the WW and what a difference. Spools up quick and makes great power all the way up the tach.
I also recently acquired a 4" ported compressor housing. Still on the fence about putting it on though. My research findings are that it makes more power quicker but has a high pitch whistle to it all the time. Might mess with it when its warm outside.
I also recently acquired a 4" ported compressor housing. Still on the fence about putting it on though. My research findings are that it makes more power quicker but has a high pitch whistle to it all the time. Might mess with it when its warm outside.
5th Wheeling
Joined: Jan 2014
Posts: 30
Likes: 0
From: NorCal
I know I am resurrecting an old and dead thread, but I am wondering if the WW2 dropped your EGT's at all. I am finally getting around to doing my fuel system, and was thinking about putting the WW2 in while I have things apart.
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