TheDieselPage.com Forums  
2014 - TDP's 19th Year
What's New: | Feature Articles: | Product Reviews: | Member's Area: | Subscribe:
Duramax 6600 Diesel Page | Advertiser's Section | Classified Ads | Photo Album | Diesel Books, GM Licensed T-shirts


Go Back   TheDieselPage.com Forums > The Diesel Page Member Forums > 6.5L Turbo Diesel
Register FAQ Members List Photo Album Mark Forums Read

6.5L Turbo Diesel 1992-00 6.5TD - Discussion forum for the 6.5L engine.

Reply
 
Thread Tools Display Modes
  #1  
Old 08-06-2012, 04:47 PM
300stw 300stw is offline
Troy
 
Join Date: Apr 2009
Location: montana
Posts: 21
Default 1994 Chevy 3500 6.5 questions,,,,

hello all, bought new truck and have a few questions, have done a little searching but havent really found what i want,,,

this truck has a rebuilt 6.5 out of a 94, the injection pump is from a 97 i am told, the truck runs pretty good,
very touchy on the throttle, in low range it bucks like a mule, when i start it if you dont burp the throttle the motor revs sky high, it also smokes bad,
no boost or egt yet,,,

i have a mechanical pump from a 93 6.5, also the pedal, cable and injector lines, i would really like to change this truck to the mechanical pump setup for reliability in this ne montana country,

i have access to the computer and the under hood wiring harness,
i would like to hear from anyone who has actually done this swap, do i need to change out computer and wiring harness or just the pump and lines, should i upgrade turbo,,

i have a diamond eye exhaust and a new crossover sitting here as well as a k47 air box,

i had a 93 cummins for a long time many mods,,

any other thoughts appreciated,,
__________________
1994 chevy 3500 4x4, CC LB 6.5, nv4500, 285 75 16 duratracs, db2 4911 pump conversion, ops conversion,
Reply With Quote
  #2  
Old 08-06-2012, 05:49 PM
300stw 300stw is offline
Troy
 
Join Date: Apr 2009
Location: montana
Posts: 21
Default 6.5

i spent some more time searching and found bobby martin guide to swapping the db2, seems pretty easy, turbo master for the turbo to control boost, what if a guy went to different turbo like a hw35 ,, how to adjust boost, thinking outloud,,
__________________
1994 chevy 3500 4x4, CC LB 6.5, nv4500, 285 75 16 duratracs, db2 4911 pump conversion, ops conversion,
Reply With Quote
  #3  
Old 08-06-2012, 09:47 PM
john8662's Avatar
john8662 john8662 is offline
modeRATOR
 
Join Date: Sep 2001
Location: Lubbock TX, USA
Posts: 4,047
Default

HX35 is wastegated, you adjust it's wastegate to regulate boost.

H1C is non-wastegated, what your 93 cummins had. To regulate boost on it you adjust fueling on the engine and match turbine housing A/R numbers to get it where you need.

J
__________________
1982 C10 SCSWB 6.5TD, mods too extensive to list. (13.69 1/4 mile @94.6 MPH) RACE TRUCK
1982 C10 SCSWB 6.2NA, 2.73 700
1986 C10 SCLWB 6.2TD 3.73 700
1984 Mercedes 190D 2.2L 5-speed Stir
1989 V20 SUB 6.2NA, 3.73 400
1994 G20 VAN 6.5NA, 3.42 60E
1994 K20LD ECSWB 6.5TD, 3.42 80E
1995 K20 SUB 6.5TD, Was Baddass, wrecked. www.evilprogressive.com
1995 C3500HD DRW 6.5TD, 12' Flatbed 5.13 80E
1995 C3500HD DRW 6.5TD, 18' Rollback Wrecker 4.63 80E
1995 C20LD ECSWB 6.5TD 3.73 80E
1995 K20LD SCLWB 6.5TD 3.73 80E
1996 K30 DRW 6.5TD 4.10 80E
Reply With Quote
  #4  
Old 08-07-2012, 07:21 AM
Robyn's Avatar
Robyn Robyn is offline
Missy Good Wench ( Moderator)
 
Join Date: Apr 2001
Location: Newberg Oregon
Posts: 7,947
Default

I see that your truck has the NV 4500 tranny, with this doing the mechanical IP swap is a snap.

Just swap in the IP and lines, do the throttle cable and your good to go.

Get the timing as close as you can by eyeball and then watch the EGT's to see where your at.

Bobby Martins info works well on the stick shift stuff.

The issues really start when you go for a swap to an auto tranny swap.

Get the DS4 off the rig and your issues will be gone for good me thinks.

The IP that works the best is the 4911

With the DB2 on the truck the computer will pretty much be left to do nothing.

The check engine light will be on, so just remove the bulb or ignore it.

The only issue will be to wire in the power Supply lines for the IP fuel solenoid and the cold advance/fasy idle.

I would say to use the original ++ feed that connected to the fuel shut off solenoid on the DS4, use this to power a constant duty relay, then feed the DB2 fule shut off and the fast idle/cold advance with the relay.

Install a cold advance temp switch from an early 6.2 in the RH head (rear side port) feed the power to the advance/fast idle through the temp switch and your set.

As soon as the ignition is turned on the relay will power the IP and the cold advance/fast idel and then once the engine warms a little the advance will shut off.

Pretty easy project.

Keep us posted

Missy
__________________
(1) 89 K5 Blazer Silverado
(1) 95 GMC Cowgirl Cadillac hauler Too much to list here but loaded to the moon with goodies
Reply With Quote
  #5  
Old 08-07-2012, 07:36 AM
Kennedy Kennedy is offline
Long Distance Crew Chief for BMDMAX
 
Join Date: Mar 2000
Location: Loyal WI US
Posts: 10,110
Default

Odds are that the eprom is incorrect to match the pump. People get the notion that a DS is a DS so they start swapping willy-nilly and create issues like this. Tis is why I request the pump model number when doing a chip in an attempt to unravel as many mismatches as I can rather than sending teh chip twice.

It could well be a bad DS but the prom would be my first suspect.
__________________
Kennedy Diesel-owner
More than just a salesman-I use and test the products that I sell on a daily basis!
Superflow Lie Detector in house
2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
2005 Chev K3500SRW D/A CC Long LT(SOLD)
2007 Chev K2500 Classic EC Short LT
2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.

Custom tuning in house using EFI Live tuning software!
Reply With Quote
  #6  
Old 08-07-2012, 08:56 AM
300stw 300stw is offline
Troy
 
Join Date: Apr 2009
Location: montana
Posts: 21
Default

thanks for the replies,,,
i have a 4911 pump if i remember right, i would like to have it rebuilt before i install, suggestions who to have rebuild it

i have a gm8 turbo, interested in upgrading it, what should i look for

do i need to do anything to fuel lift pump for longevity and reliability, in ne montana parts are few and far, help in the winter can also be few and far,

in the end i would like to get to the 225 250 horse power range to pull 3 mules and my trailer about 7000 lbs , i pull 8 or 10 times a year after that not much for towing with the truck
__________________
1994 chevy 3500 4x4, CC LB 6.5, nv4500, 285 75 16 duratracs, db2 4911 pump conversion, ops conversion,
Reply With Quote
  #7  
Old 08-07-2012, 09:38 AM
300stw 300stw is offline
Troy
 
Join Date: Apr 2009
Location: montana
Posts: 21
Default

still searching and thinking out loud,


if i keep gm8 turbo with the 4911 pump, a turbomaster for boost control i assume,
if i change to a holset 35 or similar how to kep boost in check,,,

if and when i wreck havoc with this motor i was gonna get one of the latest models from tonys trucks to use as a performance rebuild,
__________________
1994 chevy 3500 4x4, CC LB 6.5, nv4500, 285 75 16 duratracs, db2 4911 pump conversion, ops conversion,
Reply With Quote
  #8  
Old 08-07-2012, 11:21 AM
More Power's Avatar
More Power More Power is offline
Administrator
 
Join Date: Feb 2000
Location: Big Sky Country
Posts: 9,393
Default

I'd stay with the GM-8/Turbomaster for the mech conversion, at least for a while, to allow sorting out any nitpicks and give you some experience with how the engine/drivetrain perform. Once you've settled in, then consider some additional changes.

The Holset HX35W uses a boost pressure actuated wastegate. These normally produce, in stock form, a max of about 15-psi. With an intercooler, this would be OK on a stock compression ratio engine and close to stock 4911 fuel rates.

Jim
Reply With Quote
  #9  
Old 08-08-2012, 02:38 PM
300stw 300stw is offline
Troy
 
Join Date: Apr 2009
Location: montana
Posts: 21
Default

thanks for all the info from everyone, very helpful,,,

i see an electric fuel pump on the frame rail, should a guy change it out, if so what with, store the old one in the tool box for backup,,,,
__________________
1994 chevy 3500 4x4, CC LB 6.5, nv4500, 285 75 16 duratracs, db2 4911 pump conversion, ops conversion,
Reply With Quote
  #10  
Old 08-08-2012, 06:45 PM
ccc ccc is offline
Enthusiast
 
Join Date: Nov 2010
Location: rural western Mo
Posts: 89
Default

" should a guy change it out, if so what with, store the old one in the tool box for backup,,,," I did..... but then I am having problems too. Not related to that though. There are a number of threads here that tell you what your output should be and some very knowledgable folk too. If it passes the test then it just depends on how much preventative stuff you want to do and can afford. Some of the experts can help out and tell you what fuel flow you should have. Good luck on your project.
__________________
CCC
_______

1997 K1500 6.5 (S) 4X4
1976 Pete 359
1958 Dodge Powerwagon 4X4
1986 Am Gen M925 5Ton 6x6
Reply With Quote
Reply

Thread Tools
Display Modes

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 -7. The time now is 10:49 PM.


Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 1996-2014 by TheDieselPage.com - All Rights Reserved