My morning at . GTM!
#542
#548
congrats on your car and dogs both doing well... I don't think there's another person on this board that we feel as empathic about as you.... wish you the best of luck, and thanks for taking one for the team... Maybe when i buy a new car next year, i'll ship my car out to GTM for a lil "upgrade"
#550
awesome! so the boost creep is the wastegates? on my previous car, it was a leak on the compressed side of the piping.
where on the east coast is this G from????
and i have two weiner dogs to. an all black tweenie(midsized) and a brown/black miniture(around 8lbs running on 2 inch legs lol)
where on the east coast is this G from????
and i have two weiner dogs to. an all black tweenie(midsized) and a brown/black miniture(around 8lbs running on 2 inch legs lol)
#551
I didn't feel like typing so I googled this for you...
From here:http://www.allpar.com/mopar/boost-creep.html
Turbocharger Boost Creep and Spiking Boost creep is rising boost due to not enough exhaust bypassing the housing. For example, you're set for 13 psi, and when you floor it, you get a quick rise to 13 or 14 psi. But then as rpm's climb, the boost creeps higher and higher: 14, 15, 16, 17, etc. Enlargening the wastegate hole is one cure for boost creep, as you did.
Spiking is when your wastegate hole is large enough, but your actuator can is taking too long to fill with compressed air, so you temporarily overshoot your boost level. Example: you're set for 13 psi, and when you floor it it quickly rises to 16 psi, but then gradually drops downward towards 13 psi again.
A common problem with modded engines is a combination of spiking AND boost creep. That's where you're set for 13 psi, and when you floor if it overshoots to 16 psi, begins to drop back down, but as the rpm rises it goes up again.
Normal boost rise when set to 13 psi = shoots up to 14, then 13, 13, 13...
Spiking = shoots up to 16, then 15, 14, 13, 13, 13...
Boost creep = shoots up to 14, then 13, 13, 14, 15, 16, 17...
Spiking and boost creep = shoots up to 16, then 15, 14, 13, 14, 15, 16,17...
Set a manual boost control to 11 psi and floor it slowly in high gear. It should go to 11 psi and hold it pretty well. If it starts to slowly climb over 11 psi as the rpm's get high, that's "creeping". The boost creeps higher at high rpm's because there's too much exhaust flow for the wastegate hole to bypass.
Now go to 11 psi again, but tromp on it quickly! It will shoot to 13, or 14, or 15 psi, then drop down to 11 and stay there. That's "spiking."
Spiking is a quick flash of high boost that goes a little beyond your set boost point. If you are set for 11 psi, and you tromp on it quickly, this might happen: boost "spikes" to 14, quickly drops to 11, then slowly "creeps" back to 14 or more as the rpm's climb. Now you are seeing spiking followed by creeping!
From here:http://www.allpar.com/mopar/boost-creep.html
Turbocharger Boost Creep and Spiking Boost creep is rising boost due to not enough exhaust bypassing the housing. For example, you're set for 13 psi, and when you floor it, you get a quick rise to 13 or 14 psi. But then as rpm's climb, the boost creeps higher and higher: 14, 15, 16, 17, etc. Enlargening the wastegate hole is one cure for boost creep, as you did.
Spiking is when your wastegate hole is large enough, but your actuator can is taking too long to fill with compressed air, so you temporarily overshoot your boost level. Example: you're set for 13 psi, and when you floor it it quickly rises to 16 psi, but then gradually drops downward towards 13 psi again.
A common problem with modded engines is a combination of spiking AND boost creep. That's where you're set for 13 psi, and when you floor if it overshoots to 16 psi, begins to drop back down, but as the rpm rises it goes up again.
Normal boost rise when set to 13 psi = shoots up to 14, then 13, 13, 13...
Spiking = shoots up to 16, then 15, 14, 13, 13, 13...
Boost creep = shoots up to 14, then 13, 13, 14, 15, 16, 17...
Spiking and boost creep = shoots up to 16, then 15, 14, 13, 14, 15, 16,17...
Set a manual boost control to 11 psi and floor it slowly in high gear. It should go to 11 psi and hold it pretty well. If it starts to slowly climb over 11 psi as the rpm's get high, that's "creeping". The boost creeps higher at high rpm's because there's too much exhaust flow for the wastegate hole to bypass.
Now go to 11 psi again, but tromp on it quickly! It will shoot to 13, or 14, or 15 psi, then drop down to 11 and stay there. That's "spiking."
Spiking is a quick flash of high boost that goes a little beyond your set boost point. If you are set for 11 psi, and you tromp on it quickly, this might happen: boost "spikes" to 14, quickly drops to 11, then slowly "creeps" back to 14 or more as the rpm's climb. Now you are seeing spiking followed by creeping!
#553
Originally Posted by IvoryPearl07G
awesome! so the boost creep is the wastegates? on my previous car, it was a leak on the compressed side of the piping.
where on the east coast is this G from????
and i have two weiner dogs to. an all black tweenie(midsized) and a brown/black miniture(around 8lbs running on 2 inch legs lol)
where on the east coast is this G from????
and i have two weiner dogs to. an all black tweenie(midsized) and a brown/black miniture(around 8lbs running on 2 inch legs lol)
Not sure where the G is, but I was told it was an automatic sedan with ICC as well.
Cute dogs BTW (wife agrees). Word of advice … they eat everything, even when they get older!
Here's my shameless OT dog picture … it's the big one that got sick:
Originally Posted by LiquidGx
I didn't feel like typing so I googled this for you...
From here:http://www.allpar.com/mopar/boost-creep.html
From here:http://www.allpar.com/mopar/boost-creep.html
Last edited by terrycs; 11-26-2008 at 11:03 PM.