PeachParts Mercedes-Benz Forum
Page 3 of 3 12 3
Show 50 post(s) from this thread on one page

PeachParts Mercedes-Benz Forum (http://www.peachparts.com/shopforum/)
-   Diesel Performance Tuning (http://www.peachparts.com/shopforum/diesel-performance-tuning/)
-   -   Air/water intercooler installed in my 240D (http://www.peachparts.com/shopforum/diesel-performance-tuning/174919-air-water-intercooler-installed-my-240d.html)

Old300D 05-24-2007 01:37 PM
Quote:
Originally Posted by ForcedInduction (Post 1514578)
In my upgrade to 2.5" tubes I will need:
75* angle tube- 1
45* angle tube- 1
90* angle tubes- 4

Total length from the turbo outlet to the intake mouth will be about 3.5 feet (Not counting the intercooler).
I fabricated an air-air intercooler in my Datsun 280Z, which has a straight-6 non-crossflow engine. Total length of that system, using 2" tubing out of the turbo to the intercooler and opening the 2" to 3" before the intake, was about 6'. I have no noticeable lag; I attribute that to a restriction-free exhaust and a stock T3 turbine. The car dynoed 313 hp to the wheels.

libbybapa 05-24-2007 02:36 PM
I've added several air to air intercoolers to several TD engines and have never noticed an increase in lag. That being said, I've also always gone for the non-restrictive exhaust. I live at 7,000 ft of elevation so any extra lag is more than noticeable.

Andrew

ForcedInduction 05-25-2007 12:27 AM
I found some interesting info. An intercooled OM617 at 14psi (75*f air and 75% volumetric efficiency) should flow about 400cfm.

Quote:
According to Corky Bell, Maximum Boost pg 61, 304 MPH or 0.4 mach is the point at which airflow meets increased resistance (drag) and flow losses are experienced.

0.4 mach = 304 MPH

2" piping
1.57 x 2 = 3.14 sq in
300 cfm = 156 mph = 0.20 mach
400 cfm = 208 mph = 0.27 mach
500 cfm = 261 mph = 0.34 mach
585 cfm max = 304 mph = 0.40 mach


2.25" piping
3.9740625 sq in = 1.98703125 x 2
300 cfm = 123 mph = 0.16 mach
400 cfm = 164 mph = 0.21 mach
500 cfm = 205 mph = 0.26 mach
600 cfm = 247 mph = 0.32 mach
700 cfm = 288 mph = 0.37 mach
740 cfm max = 304 mph = 0.40 mach


2.5" piping
4.90625 sq in = 2.453125 x 2
300 cfm = 100 mph = 0.13 mach
400 cfm = 133 mph = 0.17 mach
500 cfm = 166 mph = 0.21 mach
600 cfm = 200 mph = 0.26 mach
700 cfm = 233 mph = 0.30 mach
800 cfm = 266 mph = 0.34 mach
900 cfm = 300 mph = 0.39 mach
913 cfm max = 304 mph = 0.40 mach


2.75" piping
5.9365625 sq in = 2.96828125 x 2
300 cfm = 82 mph = 0.10 mach
400 cfm = 110 mph = 0.14 mach
500 cfm = 137 mph = 0.17 mach
600 cfm = 165 mph = 0.21 mach
700 cfm = 192 mph = 0.25 mach
800 cfm = 220 mph = 0.28 mach
900 cfm = 248 mph = 0.32 mach
1000 cfm = 275 mph = 0.36 mach
1100 cfm max = 303 mph = 0.40 mach


3.0" piping
7.065 sq in = 3.5325 x 2
300 cfm = 69 mph = 0.09 mach
400 cfm = 92 mph = 0.12 mach
500 cfm = 115 mph = 0.15 mach
600 cfm = 138 mph = 0.18 mach
700 cfm = 162 mph = 0.21 mach
800 cfm = 185 mph = 0.24 mach
900 cfm = 208 mph = 0.27 mach
1000 cfm = 231 mph = 0.30 mach
1100 cfm = 254 cfm = 0.33 mach
1200 cfm = 277 mph = 0.36 mach
1300 cfm max= 301 mph = 0.39 mach

Bajaman 05-25-2007 09:05 AM
Are those numbers at STP? or are they corrected for the speed of sound at 14 psi, 75*F? Just curious.
BB

ForcedInduction 05-25-2007 10:36 AM
I believe that is for pure, uncompressed CFM airflow. I don't have the book, although I'll look into getting it soon, so I'm just relaying info.

Old300D 05-25-2007 12:52 PM
Quote:
Originally Posted by ForcedInduction (Post 1516193)
I believe that is for pure, uncompressed CFM airflow. I don't have the book, although I'll look into getting it soon, so I'm just relaying info.
Yeah, I have Corky's book. My 2" piping for the Z is definitely undersized, but I didn't want to modify my intercooler's 2" inlet and outlet. Not optimal, but it sure is fun.

MBdieselFreak 04-09-2008 08:15 PM
1 Attachment(s)
hey were you talking about this 9000 SAAB intercooler???? Well here's a pic of one, and i find that a good size of tubing for intercooler set ups is 2.75" i never seen that back in boston. So i guess its a canadian thing or something, because they have some at my parts supplier. if you have more boost then stock then, you should go with 3" tubing depending on the size of the intercooler too and all the intake related items.


Quote:
Originally Posted by libbybapa (Post 1509298)
What is considered the "safe" limit for pre-turbine EGTs on these motors?

After looking here and there, I'm feeling like it's time for me to learn to weld aluminum. I've got the steel welding thing down pretty good. I like the Saab 9000 intercooler for it's huge area and it's slim profile. It should leave room for a slimline fan, A/C condenser and radiator and still let the hood close. I just don't care for the Plastic endcaps. I will be running a VNT-25 and don't feel like popping the intercooler. They have all aluminum ones for $700, but for that price I'm inspired to learn al welding and make my own endcaps. :D

Andrew

raymason 04-12-2008 11:35 AM
Quote:
Originally Posted by bgkast (Post 1373514)
More pictures:

4: Old intake manifold removed
5: Intercooler temporarily in place
6: All installed.
For the turbo did you just unbolt the intake side, turn it so the outlet is up and bolt it back on? Is the intake manifold magnesium or aluminim and what type of welding process did you use?

MTUpower 04-12-2008 08:10 PM
Quote:
Originally Posted by MBdieselFreak;
if you have more boost then stock then, you should go with 3" tubing depending on the size of the intercooler too and all the intake related items.
No 3" tubes here... and certainly no lag.
http://i176.photobucket.com/albums/w...setup002-1.jpg

vstech 04-12-2008 08:31 PM
Quote:
Originally Posted by MTUpower (Post 1822532)
No 3" tubes here... and certainly no lag.
http://i176.photobucket.com/albums/w...setup002-1.jpg
that is one tight fit.
what did all that come out of? 2.5 T? inquiring minds want to know...
there is no lag, because there is only about 4" of tubing... the others discussing lag and 3" tubing etc have the intercooler up front and piping going to it, yours has the intercooler ontop of the turbo and the cooling air plumbed up front... nice!

bgkast 04-13-2008 12:45 AM
Quote:
Originally Posted by raymason (Post 1822230)
For the turbo did you just unbolt the intake side, turn it so the outlet is up and bolt it back on? Is the intake manifold magnesium or aluminim and what type of welding process did you use?

Yes, I had to remove the nuts that hold the manifolds on to get enough room to rotate the compressor housing. There are 6 bolts on the back side of the compressor housing that when loosened allow it to rotate.

The intake manifold is cast aluminum and was TIG welded.

Bartman 04-15-2008 10:44 PM
You should check out the e-bay store Just-intercoolers. They have quit a few intercoolers that could work for under $100.

ForcedInduction 04-15-2008 10:53 PM
Quote:
Originally Posted by Bartman (Post 1825809)
You should check out the e-bay store Just-intercoolers. They have quit a few intercoolers that could work for under $100.
Pressure test them first, cheap A-W intercoolers are cheap for a reason. You don't want any water getting into the intake through a bad weld.

MBdieselFreak 05-25-2008 11:34 PM
Quote:
Originally Posted by ForcedInduction (Post 1825827)
Pressure test them first, cheap A-W intercoolers are cheap for a reason. You don't want any water getting into the intake through a bad weld.


I agree a 100% there is nothing more to say! then get a A-A intercooler ;)

bgkast 05-26-2008 12:41 AM
Quote:
Originally Posted by vstech (Post 1822545)
that is one tight fit.
what did all that come out of? 2.5 T? inquiring minds want to know...
there is no lag, because there is only about 4" of tubing... the others discussing lag and 3" tubing etc have the intercooler up front and piping going to it, yours has the intercooler ontop of the turbo and the cooling air plumbed up front... nice!

That's a Saab intercooler with some shrouding. I grabbed one of those, and the GM airbox he is using at the yard, but have decided not to intercool my other car. They are available in the parts section. :)


All times are GMT -4. The time now is 08:53 PM.
Page 3 of 3 12 3
Show 50 post(s) from this thread on one page

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website