Alright, I'm a mechanic and this isn't making much sense to me at all. An ecm limiting peak numbers for no reason.

The only thing I could see is if the turbo starts pulling boost because the ecm sees "its not needed" which would pull some power but it wouldn't be able to hold it at 260 on the dot.

My other question is, if this ecm works so well and can pull power like that, what if you tossed a 100 shot on a bone stock car? What the hell would that do? The ecm pull timing and boost and then start pulling fuel till it blew?


I just don't see why any car company would put out a car that would limit the aftermarket like that. And I don't think they did.

 

you're awefully angry about this.

please do a simple search for synapse on here.

being a mechanic means dick.

 

Its based on a target lookup table. The lookup tables were developed based on a pile of variables and based on those variables and depending on the combination of cell lookups for map, boost , cam phasing etc the combination of tables create a 260 HP output. These tables were developed in an atmospheric variable dyno cell so all the variations could be mapped.

If you toss a 100 shot of nitrous on it it would gain a hundred HP as the table set and lookup is unaffected by the nitrous because its on the backend so to speak. (it's not going to change the map tables)The reality that the ecm can dynamically adjust to 260 is a misnomer in some ways. It controls to 260 on a huge combination of tables and mapped cells. A nitrous shot isn't going to change that, its going to make 260+100

 

They did, find some of the dyno charts and you will see. They are limiting the car @ 260 ft-lb of torque though, not 260 hp.

It limits it for a reason known as warranty. 5 yr, 100mi, they don't want **** to break so they arn't going to put out a car with more power than the components can reliably handle.

 

Krispy you are correct its Torque based. Just so happens when the cert was done the HP was like 262. somthin.

 

Krispy and gettinausername ...lets get lunch sometime!

Malones?

 

yea man jus not tomorrow. next week maybe. Pick the time.

 

I'm off tomorrow, but some time next week is good with me.

 

Good to see more Michigan peeps on the board

And I have nothing to add to the conversation

carry on

 

As stated, they limited it for warranty reasons

Also, consider this:

Now, any other installed mods really wont do jack **** as far as power output...
Unless it's made by GM.

So basically, they have created a monopoly for themselves in the aftermarket performance division

Smart move, IMO

 

That would work if they actually had a history of releasing performance upgrades that are worth a **** for GM cars...

2.0's are still waiting for that upgraded gmpp clutch...

 

Engine computers have been monitoring torque output for years. For gm's at least this is how the computer determines how much line pressure the automatic transmissions need to keep from slipping.

With a turbo it makes a lot of sense to regulate boost pressure by output torque instead of boost pressure. It makes for a more consistent driving experience.

Once HP Tuners gets the torque tables unlocked it won't be so bad.

 

There's nothing wrong with the clutch, people just can't drive.

 

to a point.

I don't care how good of a driver you are the stock clutch has limitations. At stock power, yeah it should last forever. Start making closer to 300 ft-lbs and things change

 

Umm.. yeah... you'll notice not even stage 3 makes anywhere near 300.

You can apparently build a 1000rwhp cobalt as well.. should GM make a clutch for that? The stock one is fine with all the GM parts, even if you add the 50 shot to the stage 3.

 

I agree!

All you guys gonna be at the Dreamcruise (Cobalt night)?

 

next time I plan on being out by the tech center I'll let you know, my normal place is the Pontiac center

 

im down as well. you guys can check out the coug

 

GM has 600 launches on the stock TC clutch. 600 launches at 5K. No issues. Zero.. They put the largest clutch they could find in the car.

 

also remember, GM gathered all of the info on warranty work over the last few years with the supercharged cobalts. so this is a way of GM "learning from their mistakes", sort to speak with the turbo-cobalt

why not? it works for Bill Gates and Microsoft.
and remember, the aftermarket car industry worth billions a year, so GM wants a taste of it. besides, GM need any extra cash it can get its hands on.

 

Well, look at it this way:

Who needs "performance upgrades that are worth a ****" when you have exclusive rights to the aftermarket of a product?

 

hey michigan people, send me a PM and let me know when you guys go cruisin. I'm near Gratiot/Woodward

 

Woodward Dreamcruise (Cobalt night) Friday, August 15, dinner then cruise....check the thread https://www.cobaltss.net/forums/show...=118710&page=6

 

I highly doubt my car will be in by then, but I could prob make it out.

I live at 12 mile n Woodward...so ya.

 

this ecu definately does its job on limiting torque it seems. we have actually seen numbers over 280ft lbs when we first changes some parts. but the ECU adapted quickly and seemed to sit comfortably at 260 ftlbs on our dyno.

the ECU doesnt read torque per say. but it can accurately estimate it based on air flow and other variables. nitrous would not affect airflow readings because nitrous is injected after the MAF sensor.