TroyK

The car seems to run fine, but if you floor it in a high gear from idle, the boost comes up to 13psi @ 2000. Then dives back to 10psi. Then boost starts coming back at 2500 & by 3000 it goes to 18-19psi for the rest of the way up.

Is this normal?

Car is stock on GMS1 & K&N filter. I do have hptuners, but never used it to tune on the car yet. Never really found any dashboards that work for LNF logging, to see if I have a sensor problem. Most of the gauges don't work on the dashboards that I found.

09CobaltSS1

punching it at a low rpm in 5th like that puts alot of load and strain on the motor.. it could just be the torque managment trying to lesson the load or the clutch could possibly even be slipping causing the ecm to pull back on the boost.. just a guess, but either way it's really not a great idea to punch it in 5th at such a low rpm like that

slowswap

Your clutch hates you.

TroyK

I normally run it in comp mode, unless wet or snow.

09CobaltSS1

I'm not entirely sure what difference you would expect comp mode to make in regards to your original question.. it doesn't seem like traction control is what is effecting you boost

Cobalt_Daddy

ya flooring it in a high gear is your problem... and i would say that maybe there is built in programming that could stop your engine and clutch from grenading from the undue stress you're putting on your drivetrain. your car has gears for a reason man use them lol

TroyK

Well it is a good excuse to get a new one.

09CobaltSS1

an even better excuse to just simply downshift.. you shoudn't need a new clutch with only GMS1 and a K&N..

skatin_boarding

Never did he say he floors it in 5th gear. Maybe hes in second. Would be kind of worthless to shift down to first just for a second. Not for sure of what it would be just standing up for the op. Could it be a wastegate problem?

tomj77

iTrader: (2)

i dont get why people floor it in a high gear at low rpms, are people retarded or do they want to break their car??

slowswap

He said high gear.

09CobaltSS1

lol exactly! it's in the first god damn line of the OP's post for christ sakes..

TroyK

Ya, well it is hard to catch or explain the problem in 1st or 2nd, as it goes to quickly & useless. 3rd, I'm to busy trying to keep it on the road with torque steer. It's nice to not have to pass people & downshift, maybe lazy, shoot me I'm a guy. Maybe I should have got a TSI, I like the low end grunt.

So no one has seen this problem? I think I seen this problem before the stage1, just my max boost use to be 13psi back then.

Curious, why do you say the clutch will go out if WOT at low end, it makes less power there. Is it from the pulsing of power from each piston firing?

slowswap

This is most likely torque management. Prevents you from making torque to reduce strain on drivetrain components from bad driving habits.

You're more likely to have clutch slips because all that's hold that motor back from spinning right up is the clutch. When you're at high RPM's, the stress is reduced because everything is already up to speed and usually moving pretty easy.

tomj77

iTrader: (2)

clutch will go out when high gear low rpm punching it, cause ur boost builds up to full and when u hit ur optimal rpm, the torque hits the motor all at once.

If ur to lazy to downshift, why dont u get something with an auto tranny??

skatin_boarding

LOL I had been drinking. Thats funny cause i read it twice. Well my bad.

TroyK

I would have, if they made it for a cobalt(auto tranny). My Grand National is a lot easier to drive with auto & easier to launch. I'm not a good stick man & it is a pain in stop N go traffic when I go to work.

09CobaltSS1

neither will happen in 1st 2nd or 3rd nearly as much if at all.. 4th and 5th are both overdrive gears causing extreme loads at wot at such a low rpm.. those safety algorythms are there 4 a good reason..

Terminator2

You should not be flooring it in 5th at less than 100 mph unless you hate your clutch and your motor. You are just asking for the clutch to slip and also for loads of knock because the A/F at WOT with the stage 1 kit is 14.0 from 2,000-4,500 rpms.