38R Surge!
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Laughing Gas
Joined: Jan 2009
Posts: 911
Likes: 74
From: Montana
38R Surge!
Is there anything that helps limit turbo surge on the 38R? When towing heavy it surges really bad! Just thought i would rattle your cages about options on fixing this issue?
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
At what rpm/boost pressure are you seeing the surge? Are you still running the 1.0 wastegated housing? I have not experienced any surge with mine. I am, however, running the 1.15 nonwastegated exh housing. Bob Riley @ Dieselsite offers porting of the 38r compressor housing to address surge. You may want to talk to him about the condition you are experiencing. He talked me out of doing the porting before I installed mine. He told me to try it first without the porting.
Cargo Master
Joined: May 2002
Posts: 2,530
Likes: 7
From: Montana
What size tires and gearing you running. also, like Roland said, what RPM range? If it is in the lower RPMs, then a 1.15 housing will help alot. the ported housing will help in the higher RPM ranges. Most surge is in the lower ranges.
Post Fiend
Joined: Feb 2008
Posts: 10,977
Likes: 5
From: Lancaster, Pa.
I haven't experienced any surge with mine. It beltched one time after a linelock after taking my foot off the throttle after spooling it up a bit but not while towing. How heavy are you towing??
Thread Starter
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Laughing Gas
Joined: Jan 2009
Posts: 911
Likes: 74
From: Montana
I don't even have to be towing that heavy to have it surge. Pulling a 28 foot enclosed trailer with five sleds isn't really that heavy! Anything under two thousand rpm and it surges bad! I just donlt want to hurt my turbo if i can do somehting to fix it!
Post Fiend
Joined: Feb 2008
Posts: 10,977
Likes: 5
From: Lancaster, Pa.
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Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Shift down, and/or run a milder tune, these engines pull the best at 2000-2500 rpm.
PREMIUM SPONSOR
Joined: Feb 2009
Posts: 6,038
Likes: 73
The difference between say 1900 and 2200 is night and say for surge, power and egt's.
Thread Starter
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Laughing Gas
Joined: Jan 2009
Posts: 911
Likes: 74
From: Montana
Pulling switch backs in the mountains suck cuz you have to slow down ofr the corners and then accelerate out of them(and not hard i might add) and it starts to surge right away. In kinda disappointed in the bottom end surge. Didn't think that would ever be a problem with the 38r.
