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Old 01-08-2011, 01:32 PM   #1
rdn2fst
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Default Cobb OTS maps HWG and LWG

I'm checking to see if i'm interpreting this correctly

HWG OTS descriptions say "2 for vehicles unable to hit target boost using standard Stage 2 map"

LWG OTS descriptions say"for vehicles that over boost using the standard Stage 2 map"

So, my car has a Blouch turbo and I know I need a protune but i'm trying to buy just a few days of safer driving before that happens.

Is the LWG map not the correct map to use for a turbo that is boosting higher than i want? it's hitting 22.6PSI and I'd be happier if it were topping out at 19PSI. LWG is the map i should use, right?

i have a blouch turbo (not sure which one), and a TurboXS turbo back exhaust along with a TurboXS uppipe. ..and a crappy Injen short tram intake with perrin inlet tube. ...stock ebcs.
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Old 01-08-2011, 01:34 PM   #2
rdn2fst
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im just confused because i read that the waste gate is normally closed so in my mind i would think the HWG (heavy waste gate) would be the map that holds the waste gate open more so as to releive boost. ...confused noob here.
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Old 01-08-2011, 02:27 PM   #3
arghx7
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Stop boosting. You could blow your engine up. Limp the car to a tuner.
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Old 01-08-2011, 02:57 PM   #4
jmikolich
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Quote:
Originally Posted by rdn2fst View Post
im just confused because i read that the waste gate is normally closed so in my mind i would think the HWG (heavy waste gate) would be the map that holds the waste gate open more so as to releive boost. ...confused noob here.
HWG = High Waste Gate and is referring to the duty cycle, not the "heavy"

and the only SAFE thing is to limp the car to a tuner.. 3k RPM or less, no boosting.

Do you have Wideband 02? if not, completely forget about boosting you could blow your car up and not even think anything is wrong... bye bye ringlands.
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Old 01-08-2011, 07:06 PM   #5
Tripintaz
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Load the LWG map and stay out of boost and get to a tuner. If you try going into boost on an OTS map with your mods you have a decent chance at damaging the motor.
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Old 01-09-2011, 10:24 AM   #6
rdn2fst
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i appreciate your responses. I know i need to get it to a tuner and i will very soon. im just checking to see if there's any way that i can turn the boost down via the cobb before i get there.

...I'll just drive it like i'm grandpa
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Old 01-09-2011, 03:30 PM   #7
Tripintaz
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If you have Access Tuner Race, you can zero out the boost targets and WGDC tables. That will cause the car to run on only mechanical boost.

If you unplugged the vacuum line to the waste gate wouldn't it have the same affect as the above? I think that will cause it to run on mechanical boost only as well. But you should double check that because I am not 100% sure.
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Old 01-10-2011, 09:18 AM   #8
xlsupreme
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Do the opposite: run a length of tube (5/32") from the turbo compressor nipple to the wastegate actuator, this will allow you to run mechanical WG boost pressure.

If you were to disconnect it completely, as suggested, your WG would never have a reference signal, which would cause it to never open, which would cause you to boost until it blew the engine / you took your foot out of it.

You'll obviously have to cap off your solenoid so there isn't a huge hole in your intake now.
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Old 01-10-2011, 10:17 AM   #9
Tripintaz
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LoL woops, I had it backwards
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Old 01-12-2011, 01:58 PM   #10
Cobb Tuning
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As has been indicated, these maps are not for your car at this point at all. Running one of these maps on your car in boost may cause engine damage. Connecting the pressure reference to the wastegate will limit you to mechanical boost, but again, you need a tune as you are already aware of.

I would advise extreme caution if you continue to drive your vehicle untuned. Stay out of the boost and go see your tuner. What kinds of supporting modifications do you have? (injectors, fuel pump etc)

Travis
COBB Tuning
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Old 01-26-2011, 06:38 AM   #11
rdn2fst
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Thanks guys. I took her to Cobb, the Doctor, and she is all better.

I'll post my results and mods in the proven power forum and link it here.

Superb work, attention to detail, and customer service by the folks at Cobb! I am very pleased.
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