38R Surge!
Elder User
Joined: Jul 2009
Posts: 768
Likes: 1
From: Live VT, Work MA
When you guys are talking about surge......can someone define it for me?
If I get into it hard my boost needle will get into the upper teens and start bouncing around like a SOB while the sound is something similar to someone waving their hand in front of a high pressure air hose (like one of those cans to blow out dust or an air compessor)........sorry that is the best I can describe it. Is that "surge"?
If so, what the heck causes it?
If I get into it hard my boost needle will get into the upper teens and start bouncing around like a SOB while the sound is something similar to someone waving their hand in front of a high pressure air hose (like one of those cans to blow out dust or an air compessor)........sorry that is the best I can describe it. Is that "surge"?
If so, what the heck causes it?
Posting Guru
Joined: Dec 2009
Posts: 2,265
Likes: 2
From: Garden City, KS
I don't like reading this... I was gonna get a 38R. Why does it surge like that?
Those of you who are having surge problems, did you tighten your wastegate rods all the way (not that it has anything to do with it)?
Those of you who are having surge problems, did you tighten your wastegate rods all the way (not that it has anything to do with it)?
Thread Starter
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Laughing Gas
Joined: Jan 2009
Posts: 911
Likes: 74
From: Montana
Im not sayin that the turbo is junk. Im just saying that the surge that i am experiencing with mine sucks. ha ha ha!
I previuosly had a stock turbo with a Wicked Wheel and a 1.0 exhaust housing and never had it surge. I really like how fast the spool up is on the 38R but just need to address the surge issue and all is good. There has to be something that can help this issue?
I previuosly had a stock turbo with a Wicked Wheel and a 1.0 exhaust housing and never had it surge. I really like how fast the spool up is on the 38R but just need to address the surge issue and all is good. There has to be something that can help this issue?
Posting Guru
Joined: Dec 2009
Posts: 2,265
Likes: 2
From: Garden City, KS
Im not sayin that the turbo is junk. Im just saying that the surge that i am experiencing with mine sucks. ha ha ha! I previuosly had a stock turbo with a Wicked Wheel and a 1.0 exhaust housing and never had it surge. I really like how fast the spool up is on the 38R but just need to address the surge issue and all is good. There has to be something that can help this issue?
I previuosly had a stock turbo with a Wicked Wheel and a 1.0 exhaust housing and never had it surge. I really like how fast the spool up is on the 38R but just need to address the surge issue and all is good. There has to be something that can help this issue?
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
Like I said in my post, contact Bob Riley @ Dieselsite. He offers porting for the 38r compressor housing. The porting is like that of the ATS compressor housing and what makes it effective at eliminating surge. Talk to Bob (tech line 352-257-1669), I'm sure he can help you out.
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
[QUOTE=PwerStroke99;9807461]I would throw a 1.15 housing on it and be done if it surging at lower RPMs. i bet that cures your problem.
Clay, do you offer the 1.15s?[/QUOTE]
That's where I got my ceramic coated 1.15 and outlet from.
Clay, do you offer the 1.15s?[/QUOTE]
That's where I got my ceramic coated 1.15 and outlet from.
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Posting Guru
Joined: Dec 2009
Posts: 2,265
Likes: 2
From: Garden City, KS
Hmmm... is the 38R with the 1.00 housing only good for chipped stock trucks? The point of the 1.15 housing is to change the RPM range the turbo spools up at better as well as open up the exhaust when bigger sticks are installed... if that fixes the surge problems, then do I need to go with one when I get around to doing my truck? I'm gonna be putting nozzles on a set of AC's and installing a DP-Tuner along with a modded 17... what's y'all's input on this? 1.00, ported 1.00, or 1.15? The reason I'd wanna hop my truck up is for even more power in the low end so that I don't have to go down to 3rd much unless I'm towing heavy... would a ported 1.00 do the trick?
Cargo Master
Joined: May 2002
Posts: 2,530
Likes: 7
From: Montana
I have 250cc hybrids with a 38R and have little to no surge issues, however, i dont tow much. When i have, i didnt have any surge issues. my 38R has a 1.0 housing on it.
However, like i said, the 1.15 will help surge at the lower RPM ranges. Some people swear by the 1.15. Im considering the 1.15 here soon for a little cooler EGTs, should help some there
However, like i said, the 1.15 will help surge at the lower RPM ranges. Some people swear by the 1.15. Im considering the 1.15 here soon for a little cooler EGTs, should help some there
Posting Guru
Joined: Dec 2009
Posts: 2,265
Likes: 2
From: Garden City, KS
I have 250cc hybrids with a 38R and have little to no surge issues, however, i dont tow much. When i have, i didnt have any surge issues. my 38R has a 1.0 housing on it.
However, like i said, the 1.15 will help surge at the lower RPM ranges. Some people swear by the 1.15. Im considering the 1.15 here soon for a little cooler EGTs, should help some there
However, like i said, the 1.15 will help surge at the lower RPM ranges. Some people swear by the 1.15. Im considering the 1.15 here soon for a little cooler EGTs, should help some there
PREMIUM SPONSOR
Joined: Feb 2009
Posts: 6,042
Likes: 79
The 1.15 A/R housing is a great option for the 38R and we do stock it, but it may cause a little lag with Stage 1 or smaller injectors. It will help the low end surge issues and also lower backpressure and EGT's.
I really think the issue here is rpm range. If you dog your truck you can make a stock turbo, 38R, 42 etc surge. I can get my 38R to surge empty if I am below 2000 rpm and pulling a small grade. The key on any turbo is not to lug the truck, if you keep the rpms up you shouldn't have an issue.
I really think the issue here is rpm range. If you dog your truck you can make a stock turbo, 38R, 42 etc surge. I can get my 38R to surge empty if I am below 2000 rpm and pulling a small grade. The key on any turbo is not to lug the truck, if you keep the rpms up you shouldn't have an issue.
Posting Guru
Joined: Dec 2009
Posts: 2,265
Likes: 2
From: Garden City, KS
The 1.15 A/R housing is a great option for the 38R and we do stock it, but it may cause a little lag with Stage 1 or smaller injectors. It will help the low end surge issues and also lower backpressure and EGT's.
I really think the issue here is rpm range. If you dog your truck you can make a stock turbo, 38R, 42 etc surge. I can get my 38R to surge empty if I am below 2000 rpm and pulling a small grade. The key on any turbo is not to lug the truck, if you keep the rpms up you shouldn't have an issue.
I really think the issue here is rpm range. If you dog your truck you can make a stock turbo, 38R, 42 etc surge. I can get my 38R to surge empty if I am below 2000 rpm and pulling a small grade. The key on any turbo is not to lug the truck, if you keep the rpms up you shouldn't have an issue.
PREMIUM SPONSOR
Joined: Feb 2009
Posts: 6,042
Likes: 79
With that in mind, then his tuning is not allowing his truck to downshift when it needs to causing the truck to lug and the turbo to surge, right? Needs a live tune, maybe? I'd be curious, though, as to whether porting the 38R will eliminate the surge or at least help it. If so, then you'd have quite a bit of low end!
Posting Guru
Joined: Dec 2009
Posts: 2,265
Likes: 2
From: Garden City, KS
With the setup I mentioned in my post above, what would you have me do? I want it to be fast, but I intend to pull alot as I already do a fair amount of hauling as it is... a set of AC's with nozzles is a slightly smaller Stage-2. You already know the reason I want a set of AC's... I've talked to you about it before. But yeah, 1.00 or 1.15, Clay?
Anybody have any feedback on porting the 38R even more?