What did you buy for your G body today? [2019]

[Turbo Zach]

See above

I see. I don't fully understand the logic behind all of it, but I see. So is your exhaust pressure over riding the waist gate spring?

 

[Northernregal]

I see. I don't fully understand the logic behind all of it, but I see. So is your exhaust pressure over riding the waist gate spring?

Being able to stack unlimited 30-40psi on either side of the gate as needed, when needed. With very fine resolution. Hold the gate shut until you turn the compressor into a flame thrower. 😀

 

[Doug Chahoy]

Ordered new headliner card, sun visors, hardware and clips. Now if I can just find all the other parts I’ve bought in the last few years somewhere in my house. I’ll be ready to get my interior done this winter ready to install after new paint in the spring.

 

[64nailhead]

I see. I don't fully understand the logic behind all of it, but I see. So is your exhaust pressure over riding the waist gate spring?

If the hotside plumbing flows well to the wastegate, then yes. In my situation, I have a 4lb spring making about 20 psi - so the answer to your question on my setup is no. It does that because there is not enough exhaust pressure for it to leak out of the wastegate. Around 20lbs I start developing backpressure, so the exhaust will start bleeding off out of the wastegate enough to stop increasing the boost level rather than go through the exhaust turbine of the turbo.

Kinda funny, to me at least, most everyone knows of boost creep. Boost creep is usually a result of the wastegate not bleeding a consistent amount of exhaust pressure to maintain a steady boost level. It can also be a result of too small of a wastegate. The common concern is that you can develop too much boost or uncontrollable boost levels, but my concern is that I'm not getting enough boost creep - I want more than 20 psi lol. My setup creeps about 16psi.

The other issue I have is that I'm building boost slowly, or not as fast as I can, once I get off the 2 step when launching. Some of that is due to the wastegate is open and a small amount of exhaust pressure is leaking off making me build boost slower than I could. Currently, I'm getting to the top of 1st gear or just shifting into 2nd to hit about 20psi. Dome control should get me to full boost well before 5500 rather than 6500-6800rpms it take now, I believe.


grrr, spring is a long way away.

 

[fleming442]

If the hotside plumbing flows well to the wastegate, then yes. In my situation, I have a 4lb spring making about 20 psi - so the answer to your question on my setup is no. It does that because there is not enough exhaust pressure for it to leak out of the wastegate. Around 20lbs I start developing backpressure, so the exhaust will start bleeding off out of the wastegate enough to stop increasing the boost level rather than go through the exhaust turbine of the turbo.

Kinda funny, to me at least, most everyone knows of boost creep. Boost creep is usually a result of the wastegate not bleeding a consistent amount of exhaust pressure to maintain a steady boost level. It can also be a result of too small of a wastegate. The common concern is that you can develop too much boost or uncontrollable boost levels, but my concern is that I'm not getting enough boost creep - I want more than 20 psi lol. My setup creeps about 16psi.

The other issue I have is that I'm building boost slowly, or not as fast as I can, once I get off the 2 step when launching. Some of that is due to the wastegate is open and a small amount of exhaust pressure is leaking off making me build boost slower than I could. Currently, I'm getting to the top of 1st gear or just shifting into 2nd to hit about 20psi. Dome control should get me to full boost well before 5500 rather than 6500-6800rpms it take now, I believe.


grrr, spring is a long way away.

Can I get an order of falafel with that gyro, please?

 

[Turbo Zach]

If the hotside plumbing flows well to the wastegate, then yes. In my situation, I have a 4lb spring making about 20 psi - so the answer to your question on my setup is no. It does that because there is not enough exhaust pressure for it to leak out of the wastegate. Around 20lbs I start developing backpressure, so the exhaust will start bleeding off out of the wastegate enough to stop increasing the boost level rather than go through the exhaust turbine of the turbo.

Kinda funny, to me at least, most everyone knows of boost creep. Boost creep is usually a result of the wastegate not bleeding a consistent amount of exhaust pressure to maintain a steady boost level. It can also be a result of too small of a wastegate. The common concern is that you can develop too much boost or uncontrollable boost levels, but my concern is that I'm not getting enough boost creep - I want more than 20 psi lol. My setup creeps about 16psi.

The other issue I have is that I'm building boost slowly, or not as fast as I can, once I get off the 2 step when launching. Some of that is due to the wastegate is open and a small amount of exhaust pressure is leaking off making me build boost slower than I could. Currently, I'm getting to the top of 1st gear or just shifting into 2nd to hit about 20psi. Dome control should get me to full boost well before 5500 rather than 6500-6800rpms it take now, I believe.


grrr, spring is a long way away.

Gotcha! Thanks for the explanation.

 

[Doug Chahoy]

Ordered enough SEM products to paint all my interior parts ( dash, door panels , and all trim panels ) Over $200.00 and I still need to go to my paint mixing store for more paint. The local trim shop has vinyl and suede in my 96 Camaro color. I’m going to have him do my new headliner card, and sun visors in suede and the upper door panels in vinyl.

 

[motorheadmike]

If the hotside plumbing flows well to the wastegate, then yes. In my situation, I have a 4lb spring making about 20 psi - so the answer to your question on my setup is no. It does that because there is not enough exhaust pressure for it to leak out of the wastegate. Around 20lbs I start developing backpressure, so the exhaust will start bleeding off out of the wastegate enough to stop increasing the boost level rather than go through the exhaust turbine of the turbo.

Kinda funny, to me at least, most everyone knows of boost creep. Boost creep is usually a result of the wastegate not bleeding a consistent amount of exhaust pressure to maintain a steady boost level. It can also be a result of too small of a wastegate. The common concern is that you can develop too much boost or uncontrollable boost levels, but my concern is that I'm not getting enough boost creep - I want more than 20 psi lol. My setup creeps about 16psi.

The other issue I have is that I'm building boost slowly, or not as fast as I can, once I get off the 2 step when launching. Some of that is due to the wastegate is open and a small amount of exhaust pressure is leaking off making me build boost slower than I could. Currently, I'm getting to the top of 1st gear or just shifting into 2nd to hit about 20psi. Dome control should get me to full boost well before 5500 rather than 6500-6800rpms it take now, I believe.


grrr, spring is a long way away.

For as cool as that is from a functionality and tuning stand point: fix your hotside.

 

[1320John$$$]

Bearings for the 12 bolt rear showed up
today
Tune up parts for the 88MC followed

 

[64nailhead]

For as cool as that is from a functionality and tuning stand point: fix your hotside.

I’m with you on fixing the hot side - it will be done.

FWIW - I’m not really into the cool thing - I’m into whipping $80k builds with a G that’s built not bought 😉. But I’m not there yet - and I know it - but it’s on the horizon.

Yhanks for the input - keep it coming.