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Old 07-12-2006, 11:57 PM   #1
Rayman21287
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Stage Pi/MercedesC300 4MA

Default COBB Stage 1, with Manual boost controller

Hey guys, I'm ordering a cobb stage 1.
I also plan on using a manual boost controller and bringing it up to 15.5 PSI.
I was wondering it this is okay to do?
Will this conflict my fuel system?
Has anyone done this before?

Thanks in advance.
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Last edited by Rayman21287; 07-13-2006 at 12:05 AM.
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Old 07-13-2006, 12:40 AM   #2
innova
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I'm pretty sure Cobb stg1 will bring it to around that PSI on its own. No need for a MBC. I wouldn't mess with one with the stock downpipe anyways as your EGT's will be through the roof.
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Old 07-13-2006, 12:44 AM   #3
Rayman21287
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Are headers and cat-back fine with just the cobb stage 1?
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Old 07-13-2006, 01:42 AM   #4
NoCalSubie
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From COBB FAQ:
The Stage 2 was tuned on a car with a full turbo-back system. If you have pieced together a less than optimal combo of parts or those that were not designed to work together you may not get the full benefits of the Stage 2 AccessECU. Boost may not come on as quickly and the peak power may be down from those that have a well designed full turbo-back system. If you have replaced the first section (second cat or downpipe section) and nothing else, then the Stage 2 map is what we would recommend. Again the results will be far less than optimal, but it will control the boost better than the Stage 1. If you have replaced sections 2-4 (third cat, mid-pipe, and muffler section then you are still Stage 1. You managed to get all except the part that makes the most difference. Again, we want to reiterate that Stage 2 will only get the intended results with a well designed complete turbo-back.
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Old 07-13-2006, 01:57 AM   #5
Rayman21287
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Cool, thanks a lot!
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Old 07-13-2006, 02:03 AM   #6
Rayman21287
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Also, if I buy the acessport with acessecu 1,
and go fully turbo-back later, could I download acessecu stage 2 mapping later?
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Old 07-13-2006, 02:28 AM   #7
sandwi54
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yes...
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Old 07-13-2006, 11:32 AM   #8
parker/slc/gc8fan
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Quote:
Originally Posted by NoCalSubie
From COBB FAQ:
The Stage 2 was tuned on a car with a full turbo-back system. If you have pieced together a less than optimal combo of parts or those that were not designed to work together you may not get the full benefits of the Stage 2 AccessECU. Boost may not come on as quickly and the peak power may be down from those that have a well designed full turbo-back system. If you have replaced the first section (second cat or downpipe section) and nothing else, then the Stage 2 map is what we would recommend. Again the results will be far less than optimal, but it will control the boost better than the Stage 1. If you have replaced sections 2-4 (third cat, mid-pipe, and muffler section then you are still Stage 1. You managed to get all except the part that makes the most difference. Again, we want to reiterate that Stage 2 will only get the intended results with a well designed complete turbo-back.

Way to go, give him the stage two map notes when he's running stage one.

It's your car man, but an MBC is bad "joo joo" with an Accessport.


Read the map notes for the map you plan on running, it should give you a hint.

I dont reccomend running somthing it hasnt been tuned for.
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Old 07-13-2006, 05:03 PM   #9
NoCalSubie
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Quote:
Originally Posted by parker/slc/gc8fan
Way to go, give him the stage two map notes when he's running stage one.

It's your car man, but an MBC is bad "joo joo" with an Accessport.


Read the map notes for the map you plan on running, it should give you a hint.

I dont reccomend running somthing it hasnt been tuned for.
It also states about stage 1.
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Old 07-13-2006, 05:04 PM   #10
NoCalSubie
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Do not install the MBC even with AP.
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Old 07-14-2006, 07:54 AM   #11
Valhakar
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Quote:
Originally Posted by NoCalSubie
Do not install the MBC even with AP.
Why would you make a blanket statement like that? I run a Protune with a MBC added after the fact. I run it to target boost levels for daily driving (17.5 PSI for my protuned map) and 18-20 PSI at the track in conjunction with 110 octane fuel.

I see no PTB issues at all, but my driving style in traffic is always the higher the gear the better. Even when romping on it the first week or so, any PTB I saw was caught by the ECU and AFR would dip into the 12:1 range with no issues. EGTs are normal.

NOW FOR WHAT I RUN WITH IT:

Boost gauge
oil temperature/pressure gauge
EGT gauge
Wideband AFR gauge

With the telemetry above I can see when the car is being pushed too hard before it is pushed too hard. A MBC/EBC with AP/Streetuner/Protuner is what many of not most people I know run.

Oh and the last tidbit for the typical NASIOC hound looking for a fight. 71K on the original engine and tranny. Last compression test 150-150-150-149.

If you go with a MBC, get a Hallman Pro RX. It's the only one I recomend for our cars. Once dialed in I can see 18 PSI in 4th and 5th while still seeing 17+ in 1-3. You can get for 80 bucks off Ebay and it is the most over engineered MBC I have ever seen.
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Old 07-14-2006, 08:50 PM   #12
parker/slc/gc8fan
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Quote:
Originally Posted by NoCalSubie
It also states about stage 1.

Didnt mean to be harsh, there are small differences in the notes, they arent very applicable here though

Custom tuning is the Key, And it should be done when an MBC is added, bottom line.
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