Turbo spooling issue. - Page 2 - Competition Diesel.Com

kawi600 · 04-14-2016, 05:05 AM

Ive got a hamilton valvetrain on my engine and it still barks real bad. Only fixes I can think of are a BOV or a trans controller.
Would be nice to be able to have more control over the shift points on the trans. Adjust the TV cable slack a little from the cab, along with the pot setting.

jlbayes · 04-14-2016, 06:55 AM

When I had bigger singles on my truck I got in the habit of turning od off until 60mph, helped tremendously. Would bark an s400 hard enough to make you cringe.

kawi600 · 04-14-2016, 08:37 AM

yeah I do that with OD too but lockup still drops a couple hundred RPM and comes on in the worst possible places. Might do something simple like switch OD -and- lockup via a relay off that switch.

GAmes · 04-14-2016, 06:55 PM

In the aviation world that bark is called a compressor stall. Having one in a helicopter requires a major inspection of the engine and drivetrain because of the whiplash effect it has. Even though the compressor wheels of a turbine engine have an outer ring to stabilize them there are instances of the blades breaking off at the root and going through the hot end. My advice is to not take the bark lightly. You can be doing some major damage to your high priced turbos, and possibly the trans and differential. If you know what conditions cause it, quit putting yourself in those situations. You know, if it hurts when you do that, don't do that.

admcummin · 04-14-2016, 07:40 PM

I've ran a few chargers with that turbine and never had to be at that high of rpm to avoid surging. I would check the clearance between the turbine and housing. Make sure your gate pucks are sealing also.

*JQmile* · 04-14-2016, 08:27 PM

What size tires and gear ratio? How about boost?

cummins939 · 04-27-2016, 10:08 AM

Gotta love the t3 s300's I've never had good luck with them at light throttle/normal driving. Use your od button with lockup switch until you can get an s400 blowing into it or just do an s400 single. Will it lag more? Yes, will it still surge some normal driving? Yes but not as badly because boost will be lower than the s3 at same rpm and the t4 housing and s400 turbine really let the thing breath. But you will absolutely need to manual shift od/lockup yourself then. It's just a different driving style unless you want to go back to a hx35/40

04-14-2016, 05:05 AM	#21
kawi600 Name: kawi600 Title: got Coal for Christmas Status: Not Here Join Date: Jun 2008 Location: communist urban hell Member`s Gallery Posts: 861	Ive got a hamilton valvetrain on my engine and it still barks real bad. Only fixes I can think of are a BOV or a trans controller. Would be nice to be able to have more control over the shift points on the trans. Adjust the TV cable slack a little from the cab, along with the pot setting. __________________ Psalm 144 Psalm 37:10,11 Isaiah 65:20 Last edited by kawi600; 04-14-2016 at 05:09 AM.

04-14-2016, 06:55 AM	#22
jlbayes Name: jlbayes Title: Too Much Time Status: Not Here Join Date: Mar 2011 Location: michigan Member`s Gallery Posts: 2,399	When I had bigger singles on my truck I got in the habit of turning od off until 60mph, helped tremendously. Would bark an s400 hard enough to make you cringe. __________________ Jacob, 97 rclb

04-14-2016, 08:37 AM	#23
kawi600 Name: kawi600 Title: got Coal for Christmas Status: Not Here Join Date: Jun 2008 Location: communist urban hell Member`s Gallery Posts: 861	yeah I do that with OD too but lockup still drops a couple hundred RPM and comes on in the worst possible places. Might do something simple like switch OD -and- lockup via a relay off that switch. __________________ Psalm 144 Psalm 37:10,11 Isaiah 65:20

04-14-2016, 06:55 PM	#24
GAmes Name: GAmes Title: Retired Apache pilot Status: Not Here Join Date: Jun 2012 Location: Killeen, TX Member`s Gallery Posts: 271	In the aviation world that bark is called a compressor stall. Having one in a helicopter requires a major inspection of the engine and drivetrain because of the whiplash effect it has. Even though the compressor wheels of a turbine engine have an outer ring to stabilize them there are instances of the blades breaking off at the root and going through the hot end. My advice is to not take the bark lightly. You can be doing some major damage to your high priced turbos, and possibly the trans and differential. If you know what conditions cause it, quit putting yourself in those situations. You know, if it hurts when you do that, don't do that. __________________ '97 Dodge 3500, G56, slightly bombed, A million+ miles, started 2nd million on 8/24/13 Now past 1.3 million and going strong.

04-14-2016, 08:27 PM	#26
JQmile Name: JQmile Title: Comp Diesel Sponsor Status: Not Here Join Date: Nov 2006 Member`s Gallery Posts: 6,976	What size tires and gear ratio? How about boost? __________________ 89 Dodge 972rwhp on the hose, still a VE!

04-14-2016, 07:40 PM	#25
admcummin Name: admcummin Title: Diesel Enthusiast Status: Not Here Join Date: Nov 2011 Member`s Gallery Posts: 222	I've ran a few chargers with that turbine and never had to be at that high of rpm to avoid surging. I would check the clearance between the turbine and housing. Make sure your gate pucks are sealing also.

04-27-2016, 10:08 AM	#27
cummins939 Name: cummins939 Title: Too Much Time Status: Not Here Join Date: Aug 2009 Member`s Gallery Posts: 636	Gotta love the t3 s300's I've never had good luck with them at light throttle/normal driving. Use your od button with lockup switch until you can get an s400 blowing into it or just do an s400 single. Will it lag more? Yes, will it still surge some normal driving? Yes but not as badly because boost will be lower than the s3 at same rpm and the t4 housing and s400 turbine really let the thing breath. But you will absolutely need to manual shift od/lockup yourself then. It's just a different driving style unless you want to go back to a hx35/40 __________________ 04.5:10.94@125