Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 03-19-2010, 10:37 PM
Banned
 
Join Date: Aug 2008
Location: Texafornia
Posts: 5,493
Needa Mad Max switch for Holset Very Good Turbo

Well -I been searching dilligently for one for about a yr n 1/2 or so every other day and one just showed up being advertised locally, I still have to bone up on the action-ation. Just like max--You know-The ----LAST V8---I gotta bite the bullet and think this is the last of these vgt's im gonna run across. its in primo shape but he wants about haf what a new one is. I could buy anothe car but I dont --this is easier to store until i get the control happeninn- and i dont have to worry about adaptors cept for the big mouth inlet! BGkast how are you controlling your vgt?
Reply With Quote
  #2  
Old 03-20-2010, 09:57 AM
Registered User
 
Join Date: Mar 2008
Posts: 51
which model holset did you decide on...
__________________
1983 W123 300D Turbo
2000 F250 7.3 Powerstroke
Reply With Quote
  #3  
Old 03-20-2010, 02:41 PM
dagObx's Avatar
Registered User
 
Join Date: Jan 2008
Location: Outer Banks, NC
Posts: 382
I may be reading your post wrong, but I believe the booster shown in your film clip is actually a supercharger, not a turbo charger. They are different animals that accomplish the same thing through different means. Supercharger is driven by belts, etc. from the engine, while the turbo charger uses exhaust gases to provide the driving source.
Reply With Quote
  #4  
Old 03-20-2010, 03:14 PM
Renntag's Avatar
User Especial
 
Join Date: Jul 2008
Location: Kona, Hi
Posts: 1,390
I think the mad max super charger sequence referenced is for our entertainment only.

Joke fail.

I got it.
Love the vid clip added to the post.
__________________
83 300TD (need rear wiper assembly dead or alive)
85 300TD almost 400k miles and driven daily.
98 E300D *sold
86 300SDL *sold and made flawless 10 hour journey to new home.
Reply With Quote
  #5  
Old 03-20-2010, 03:20 PM
Registered User
 
Join Date: Mar 2008
Posts: 51
With a VGT you can hold the "fins" closed to maintain full boost. For our applications most are setup to release pressure between 12 and 20 psi. As manifold pressure increases and you are nearing the upper limits of your settings, the VGT and VNT turbo will open fins to let off boost. the mad max switch can be installed so that the fins never open and you maintain the boost...
__________________
1983 W123 300D Turbo
2000 F250 7.3 Powerstroke
Reply With Quote
  #6  
Old 03-20-2010, 03:57 PM
Renntag's Avatar
User Especial
 
Join Date: Jul 2008
Location: Kona, Hi
Posts: 1,390
Interesting. how difficult is it to install this? Is the Turbo itself much different than what we have stock? (referring to physical size and attachment.)
__________________
83 300TD (need rear wiper assembly dead or alive)
85 300TD almost 400k miles and driven daily.
98 E300D *sold
86 300SDL *sold and made flawless 10 hour journey to new home.
Reply With Quote
  #7  
Old 03-20-2010, 04:38 PM
Banned
 
Join Date: Aug 2008
Location: Texafornia
Posts: 5,493
Quote:
Originally Posted by houtxfdcapt View Post
which model holset did you decide on...
The only one thats appropriate for the 3 ltr is the--the he341ve--not the usual one. I didn't just decide on it, Ive been on a quest to find one for a looong time-they are very un common in America. The he351ve is too big for a mercedes diesel and can be found any day on ebay- the dodge egr lets soot build up-The electronic controller sends a false signal because the veins start to stick and the check engine light comes on and they get a new turbo under warrenty.
on the controlling boost part-i have heard to only let it go to 15 pounds max.

Last edited by panZZer; 03-23-2010 at 08:15 PM.
Reply With Quote
  #8  
Old 03-20-2010, 04:45 PM
Registered User
 
Join Date: Mar 2008
Posts: 51
did you look into the Holset hx25's?
__________________
1983 W123 300D Turbo
2000 F250 7.3 Powerstroke
Reply With Quote
  #9  
Old 03-20-2010, 04:48 PM
Banned
 
Join Date: Aug 2008
Location: Texafornia
Posts: 5,493
Quote:
Originally Posted by houtxfdcapt View Post
did you look into the Holset hx25's?
Thats not a vgt, if I had to go with some non variable turbo-in my opinion a non modern one--I may as well just jeave the stock one on-they dont usually go out, the 25 sounds way on the small side.

Last edited by panZZer; 03-20-2010 at 06:31 PM.
Reply With Quote
  #10  
Old 03-20-2010, 05:09 PM
Banned
 
Join Date: Aug 2008
Location: Texafornia
Posts: 5,493
Quote:
Originally Posted by Renntag View Post
Interesting. how difficult is it to install this? Is the Turbo itself much different than what we have stock? (referring to physical size and attachment.)
The holset he341ve is a bolt in, no adapter plates on the manifold or rear exit-stock exhaust mounts up. Depending on what kind of aircleaner is being used a new inlet duct of some type is needed in any swap, I already swapped an 85 Cali aircleaner from my first car. This turbo can give 20% more power at least, with the usual -injector nozzles-115 intake-turn up the pump a little, some guys include an intercooler 25% max which can bring the 25 plus idi 617 up to the hp of a modern dodge/mercedes sprinter electronic om602 2.5 5 cyl.
http://www.peachparts.com/shopforum/vbpicgallery.php?do=big&p=3948

Last edited by panZZer; 03-20-2010 at 06:47 PM.
Reply With Quote
  #11  
Old 03-21-2010, 01:19 AM
Banned
 
Join Date: Aug 2008
Location: Texafornia
Posts: 5,493
Quote:
Originally Posted by dagObx View Post
I may be reading your post wrong, but I believe the booster shown in your film clip is actually a supercharger, not a turbo charger. They are different animals that accomplish the same thing through different means. Supercharger is driven by belts, etc. from the engine, while the turbo charger uses exhaust gases to provide the driving source.
Oh well,......... never mind
Reply With Quote
  #12  
Old 03-22-2010, 06:50 PM
Banned
 
Join Date: Aug 2008
Location: Texafornia
Posts: 5,493
Ahhh.... once again -Forced has the answer

Where has he been anyway?
Reply With Quote
  #13  
Old 03-22-2010, 08:30 PM
bgkast's Avatar
Rollin' on 16s
 
Join Date: Dec 2005
Location: Vancouver WA
Posts: 6,528
I am using a standard wastegate actuator like the one forced posted in conjunction with a vacuum actuator hooked to the VCV for the transmission. The wastegate (pressure) actuator alone will work, but it will likely just cause the turbo to put out a set pressure, even when you don't need it (partial "throttle", cruising etc)
__________________
1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine
Reply With Quote
  #14  
Old 03-22-2010, 09:26 PM
Banned
 
Join Date: Aug 2008
Location: Texafornia
Posts: 5,493
Quote:
Originally Posted by bgkast View Post
I am using a standard wastegate actuator like the one forced posted in conjunction with a vacuum actuator hooked to the VCV for the transmission. The wastegate (pressure) actuator alone will work, but it will likely just cause the turbo to put out a set pressure, even when you don't need it (partial "throttle", cruising etc)
So as far as the dashpot in the pic--would a 90 dodge vnt actuator work- it uses both pressure and vaccum to actuate it from what i read.
Reply With Quote
Reply

Bookmarks

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 12:32 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page