Advertisement
If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Home Who's Online Today's Posts HP Calculator CompD Gift Shop Mark Forums Read
Go Back   Competition Diesel.Com - Bringing The BEST Together > Tech Area- Dodge > Dodge Tech > 94-98 2nd Gen. 12V
Register Members List Timeslips EFI Live Library Invite Your Friends FAQ Calendar Mark Forums Read

Reply
 
Thread Tools
Old 10-25-2017, 08:06 AM   #21
Justappumped24v
 
Justappumped24v's Avatar

Name: Justappumped24v
Title: Too Much Time
Status: Not Here
Join Date: Feb 2016
Location: Illinois
Member`s Gallery
Posts: 627
Did you replace the engine mount inserts? I have personally ran that cam on a p pumped 24v and it was very smooth minus the full cut delivery valves that caused some loping. I’ve seen loose dampeners cause vibrations as stated. Above 2500 rpm it’s hard to distinguish vibrations since 12vs are not the smoothest motor known to Man kind. I’d also do a once over on your injection lines make sure they didn’t get kinked or bent at some point. What did you set valve lash too? What clutch is in the truck? And what fly wheel? My south bend dual disc had a werid vibration to it that was different then the stocker it replaced
__________________
98.5 24v just a 350hp tow pig
98 CCLB 12V UCC qualifier build
  Reply With Quote
Old 10-25-2017, 02:00 PM   #22
Cummin12vsource
 
Cummin12vsource's Avatar

Name: Cummin12vsource
Title: Green Behind the Ears
Status: Not Here
Join Date: Jul 2015
Member`s Gallery
Posts: 32
Iíd def check engine mounts before re getting to excited


Sent from my iPhone using Tapatalk
__________________
97cummins 2002 qclb,160 pump 5x14s,191 dvs, whc1
,built 47re , sbc. No fuel heater or pre-filter,tork-tec adj ovf ,straight pipe 4in,tuned afc,no plate.Boost,tranny temp,egts,fuel pressure.4:10 gears 285/75/16 tires
,limited slip rear,aftermarket intercooler.
  Reply With Quote
Old 10-25-2017, 02:25 PM   #23
Spurrinit
 
Spurrinit's Avatar

Name: Spurrinit
Title: Green Behind the Ears
Status: Not Here
Join Date: Sep 2008
Location: Midlothian, TX
Member`s Gallery
Posts: 63
Quote:
Originally Posted by Justappumped24v View Post
Did you replace the engine mount inserts? I have personally ran that cam on a p pumped 24v and it was very smooth minus the full cut delivery valves that caused some loping. Iíve seen loose dampeners cause vibrations as stated. Above 2500 rpm itís hard to distinguish vibrations since 12vs are not the smoothest motor known to Man kind. Iíd also do a once over on your injection lines make sure they didnít get kinked or bent at some point. What did you set valve lash too? What clutch is in the truck? And what fly wheel? My south bend dual disc had a werid vibration to it that was different then the stocker it replaced


I put new oem motor mounts on along with the energy suspension outer pieces. Original mount inserts were torn.

Itís good to know that the cam should idle smooth. Thanks for the reply.

Iím going to look into a new dampener and see if that helps any.

I set valve lash to .01 intake .02 exhaust.

I used a new valair hd single disk with their flywheel.
__________________
White 04 Dodge 2500 4X4, QC, SB, 48RE, 3.73 gears, JTT built DTT
BFG 315's, SuperLift Leveling Springs w/ Rancho RS9000X's, Frontier Replacement Bumpers
Smarty Jr. and Dr Performance Predator, Commander w/FP kit, GDP Walbro pump

1995 4X4 single cab NV4500
  Reply With Quote
Old 10-25-2017, 02:29 PM   #24
Justappumped24v
 
Justappumped24v's Avatar

Name: Justappumped24v
Title: Too Much Time
Status: Not Here
Join Date: Feb 2016
Location: Illinois
Member`s Gallery
Posts: 627
Quote:
Originally Posted by Spurrinit View Post
I put new oem motor mounts on along with the energy suspension outer pieces. Original mount inserts were torn.

Itís good to know that the cam should idle smooth. Thanks for the reply.

Iím going to look into a new dampener and see if that helps any.

I set valve lash to .01 intake .02 exhaust.

I used a new valair hd single disk with their flywheel.
Itís possible you are unfamiliar with the new clutch vibration, I would contact them and see if that is normal before you tear your hair out
__________________
98.5 24v just a 350hp tow pig
98 CCLB 12V UCC qualifier build
  Reply With Quote
Old 10-25-2017, 03:01 PM   #25
95cummins5.9
 
95cummins5.9's Avatar

Name: 95cummins5.9
Title: You are what you eat.
Status: Not Here
Join Date: Jun 2012
Location: Knox County, IL
Member`s Gallery
Posts: 3,528
What are the readings with a infrared gun at each cylinder?
  Reply With Quote
Old 10-25-2017, 08:39 PM   #26
Spurrinit
 
Spurrinit's Avatar

Name: Spurrinit
Title: Green Behind the Ears
Status: Not Here
Join Date: Sep 2008
Location: Midlothian, TX
Member`s Gallery
Posts: 63
Quote:
Originally Posted by 95cummins5.9 View Post
What are the readings with a infrared gun at each cylinder?


I drove the truck and got it warm then pulled into the shop and checked the exhaust temps at each cylinder on the same spot on the manifold. I took 2 different readings. First is when I pulled in and the second after it idled a while.

Temps

1: 198 : 187
2: 240 : 222
3: 248 : 218
4: 235 : 219
5: 230 : 209
6: 217 : 195
__________________
White 04 Dodge 2500 4X4, QC, SB, 48RE, 3.73 gears, JTT built DTT
BFG 315's, SuperLift Leveling Springs w/ Rancho RS9000X's, Frontier Replacement Bumpers
Smarty Jr. and Dr Performance Predator, Commander w/FP kit, GDP Walbro pump

1995 4X4 single cab NV4500
  Reply With Quote
Old 10-25-2017, 10:28 PM   #27
95cummins5.9
 
95cummins5.9's Avatar

Name: 95cummins5.9
Title: You are what you eat.
Status: Not Here
Join Date: Jun 2012
Location: Knox County, IL
Member`s Gallery
Posts: 3,528
Nothing seems wrong there. I'd buy a fluid damper balancer if I was you, seems you have spent money in all the other right spots. I know on my dual disk it has a spray paint line where it was balanced as a assembly. I suppose your flywheel or pressure plate could be out of balance. I wonder if the vibration is the same with the clutch engaged vs disengaged?
  Reply With Quote
Old 10-25-2017, 10:42 PM   #28
Spurrinit
 
Spurrinit's Avatar

Name: Spurrinit
Title: Green Behind the Ears
Status: Not Here
Join Date: Sep 2008
Location: Midlothian, TX
Member`s Gallery
Posts: 63
Quote:
Originally Posted by 95cummins5.9 View Post
Nothing seems wrong there. I'd buy a fluid damper balancer if I was you, seems you have spent money in all the other right spots. I know on my dual disk it has a spray paint line where it was balanced as a assembly. I suppose your flywheel or pressure plate could be out of balance. I wonder if the vibration is the same with the clutch engaged vs disengaged?

Thanks for the input. Iím looking at fluid dampers right now.

I checked that today. Engaging and disengaging the clutch doesnít seem to change the vibration at all.
__________________
White 04 Dodge 2500 4X4, QC, SB, 48RE, 3.73 gears, JTT built DTT
BFG 315's, SuperLift Leveling Springs w/ Rancho RS9000X's, Frontier Replacement Bumpers
Smarty Jr. and Dr Performance Predator, Commander w/FP kit, GDP Walbro pump

1995 4X4 single cab NV4500
  Reply With Quote
Old 10-26-2017, 12:18 AM   #29
jimbo486
 
jimbo486's Avatar

Name: jimbo486
Title: Too Much Time
Status: Not Here
Join Date: Jan 2010
Location: Orange County, CA
Member`s Gallery
Posts: 1,578
Take a close look at the OEM damper. There is an indexing mark on the outer housing and the hub. Those marks should align. Cummins says if they're offset either direction, the damper needs to be replaced. Without referring to my Cummins manual, I don't remember the value they specified, it may only be 1/16"-1/8".

Also check the rubber isolator between the hub and outer housing for cracking or missing pieces which can also warrant a replacement.

I'm not sure if either of the above could cause enough of a vibration to be noticeable but it's worth looking into.
__________________
1990 Dodge D350
Giles' 12mm VE - Airdog II 165 - THD 370s @ 75lpm - BW S362fmw/68/12 - Hammy 182/214 - '01 NV5600

2013 VW Passat TDI
AFE exh. - AFE Stage 2 intake

Last edited by jimbo486; 10-26-2017 at 12:19 AM.
  Reply With Quote
Old 10-26-2017, 02:18 PM   #30
jimbo486
 
jimbo486's Avatar

Name: jimbo486
Title: Too Much Time
Status: Not Here
Join Date: Jan 2010
Location: Orange County, CA
Member`s Gallery
Posts: 1,578
Click the image to open in full size.
__________________
1990 Dodge D350
Giles' 12mm VE - Airdog II 165 - THD 370s @ 75lpm - BW S362fmw/68/12 - Hammy 182/214 - '01 NV5600

2013 VW Passat TDI
AFE exh. - AFE Stage 2 intake
  Reply With Quote
Old 10-26-2017, 09:47 PM   #31
Spurrinit
 
Spurrinit's Avatar

Name: Spurrinit
Title: Green Behind the Ears
Status: Not Here
Join Date: Sep 2008
Location: Midlothian, TX
Member`s Gallery
Posts: 63
Thanks for the info on the damper.
__________________
White 04 Dodge 2500 4X4, QC, SB, 48RE, 3.73 gears, JTT built DTT
BFG 315's, SuperLift Leveling Springs w/ Rancho RS9000X's, Frontier Replacement Bumpers
Smarty Jr. and Dr Performance Predator, Commander w/FP kit, GDP Walbro pump

1995 4X4 single cab NV4500
  Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 07:07 PM.

 


Powered by vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright ©2006 - 2017, CompetitionDiesel.com
all information found on this site is property of www.competitiondiesel.com