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  #1  
Old 06-09-2010, 02:38 AM
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Join Date: Mar 2010
Posts: 30
just introducing

Hey all, I am introducing myself here and asking for help!

What I have:

2.3L M111 with M62. Car is SLK230

-Custom intake work, larger intercooler and moved MAF sensor
-MAF 4.7V clamp
-ASP pulley
-4bar FPR
-330CC Ford REDTOP injectors
-3" high flow cat
-2.5" highflow muffler after cat
-SLK32 amg brake upgrade
-HR springs, bilstein shocks


Right now I run about 14psi at my S/C and 9-10psi at my intake manifold. Because of this 4-5psi loss I am running too rich with the larger injectors. I'm in the process to find a slightly smaller intercooler that may flow a little better... otherwise I'm not sure where my pressure loss is from... it seems kind of steep (i know that usually there is psi loss on a manifold anyway).


I'm fairly inexperienced with modifying this engine, but I do know a little here and there.


I'm looking to remove the S/C magnetic clutch, but to not cause a check engine light. If I can solve that problem, I will probably be able to add a different supercharger to the car to help performance

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  #2  
Old 06-09-2010, 02:43 AM
Turbo E320's Avatar
Im a Jeanyus
 
Join Date: Nov 2007
Location: Jeffersonville, Indiana
Posts: 475
You could use an Apexi SAFC NEO to bring down the MAF reading and lean the fuel mixture out to the correct AFR. Any pictures of your setup? That might help discern what may be causing your pressure loss.
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1997 Mercedes E320 Turbo
Garrett T3/60-1 Turbocharger
Custom Water Intercooler Setup
352rwhp/366rwtq @ 8.6psi in '08

http://img78.imageshack.us/img78/1051/log7smallay9.jpghttp://img66.imageshack.us/img66/740...s3smallox0.jpg
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  #3  
Old 06-09-2010, 03:13 AM
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Posts: 30
Here are some pics.. not greatest.. but kind of show.



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  #4  
Old 06-09-2010, 04:02 AM
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Im a Jeanyus
 
Join Date: Nov 2007
Location: Jeffersonville, Indiana
Posts: 475
Check the bottom left clip in this picture, where the metal pipe from the S/C meets the plastic pipe. If it isn't seated properly you get a major boost leak.

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1997 Mercedes E320 Turbo
Garrett T3/60-1 Turbocharger
Custom Water Intercooler Setup
352rwhp/366rwtq @ 8.6psi in '08

http://img78.imageshack.us/img78/1051/log7smallay9.jpghttp://img66.imageshack.us/img66/740...s3smallox0.jpg
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  #5  
Old 06-09-2010, 01:02 PM
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Posts: 30
Well mine is the different one, with the M62 s/c.

Also, after my intake piping, my silicone coupler that connects to the Supercharger OUTLET seats on the outside of the OUTLET. She's clamped down pretty good, at least I think.. I have a bunch of T-bolt clamps on the way, should be here by tomorrow or thursday... gonna make sure everything is 10x tighter than it is now
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  #6  
Old 06-10-2010, 01:51 AM
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Posts: 213
my understanding of it is that the pressure loss will be coming from the intercooler cooling the air, combined with slight flow/pressure loss from the pipework and intercooler
what size is your charge piping?,
you would probebly want 2 1/2"

also where are you measuring the pressures from on the intake side?
in the intake plenum after the throttle butterfly of before the butterfly just before the air goes into the intake? i say this because maby the throttle butterfly maby limiting flow and you would need to check the pressure on both sides of this to know.
from logan
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  #7  
Old 06-10-2010, 09:45 AM
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Posts: 30
I get my reading from right out the supercharger (on the s/c outlet) and right on the manifold.

Piping is 2.5" and my intercooler may be the cause, but IDK yet.. I have a smaller/smoother flowing one on the way to see if theres any changes. Once that gets here and the new clamps, if theres no change then I will pressurize the whole system to boost leak test.

Loosing 4psi out of 14psi on an intercooler is an unheard-of pressure loss
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  #8  
Old 06-11-2010, 12:52 AM
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Posts: 4,177
If you're running lean from a boost leak then it stands to reason that the leak is past the mass air flow meter. Any air leaked in front of it wouldn't be measured and wouldn't cause a rich condition.

How old is the meter itself? What are the adaptation values?
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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE
104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff
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  #9  
Old 06-11-2010, 01:47 AM
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I'm running rich right now because of larger injectors... and the lack of air.

What do you mean how old is the meter? The MAF sensor? I'd say its a year or so old.
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  #10  
Old 06-12-2010, 01:26 AM
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Posts: 4,177
Yes I was referring to the MAF. It's not uncommon for them to crap out with moderate age but I'd doubt a year would do it in.

Have you tried running this much boost with the stock injectors?
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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE
104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff
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  #11  
Old 06-12-2010, 03:04 AM
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Join Date: Mar 2010
Posts: 30
Quote:
Originally Posted by duxthe1 View Post
Yes I was referring to the MAF. It's not uncommon for them to crap out with moderate age but I'd doubt a year would do it in.

Have you tried running this much boost with the stock injectors?

With stock injectors it was running okay. But i was also running less boost than what I should, when I ran it on a dyno I was able to pulley a few more pounds miraculously, and it picked up a lean mixture. So I upped the injectors to richen it up, so it basically gives the ECU more room rich/lean to work with once I figure out where my lost PSIs are at.
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  #12  
Old 06-16-2010, 06:17 PM
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Join Date: Mar 2010
Posts: 30
This is how my boost is running right now.. The intercooler loss seems excessive:

13psi at the S/C.
12.5 right before intercooler (after bypass valve)
10 right AFTER intercooler.
9 on the intake manifold
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  #13  
Old 06-16-2010, 08:16 PM
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Join Date: Oct 2004
Posts: 4,177
Sounds like it's time to pull the I/C off and have it leak tested. Any good radiator shop would be able to pressurize it and dunk it in a tank to check for leakage, and I doubt it would cost very much.
__________________

90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE
104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff
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  #14  
Old 06-17-2010, 12:13 AM
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Location: Philadelphia
Posts: 7,366
Welcome to the forum! That is far too much IC loss in my experience, definitely pressure test it or compare to your new one and let us know.
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Current stable:
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  #15  
Old 07-01-2010, 02:39 PM
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Join Date: Mar 2010
Posts: 30
Just another update:

New intercooler is JUST now shipping today.. the transaction got lost because the item was back-ordered. It is still larger than stock, and we'll see what kind of pressure loss I get with it.


A weird thing happened about 2 days ago also.. I suddenly picked up like .5-1.0 psi at the intake manifold.. and my injector issue fixed itself because of this.. So.. I'm not sure where that PSI came from, makes me wonder

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