Wastegate Info

[Turbo Habanero]

Hey guys i have a couple questions once again

1st Question lets say i buy this and put it on. How does this up my boost and wouldnt that be a bad idea to up the boost on a pretty much stock motor?

Maybe i am taking the statement made by BIC wrong. I guess he could be saying that it is possible to build 13lbs by 2800rpms?

I have ARP headstuds/MHG Rebuilt everything else.

3" Downpipe with Divorced Wastegate (DDP)
This specially designed full 3" downpipe utilizes a seperate pipe for the wastegate exhaust that vents to the atmosphere, making for less turbulence and higher flow for more power gains. Dyno results have shown gains of 29 whp over a standard 3 inch downpipe setup. Warning: Running the wastegate straight to the atmosphere makes your car LOUD at full boost.

As with all my downpipes, this eliminates the stock heavy restrictive turbo elbow. It has 3/8" thick flanges and bolts to the CT26 turbo and up to the stock or replacement main cat. This downpipe will increase throttle response and the turbo will spool much quicker than stock and will make 13psi at 2600-2800 rpm, and keeps pulling hard up to redline. Made from mandrel bent aluminized steel and coated with VHT high temp paint. Includes a new gasket and bolts for the catylic converter flange. Uses the stock O2 sensor and heat shield.

 

[Turbo Habanero]

Also what is the advantages to running a External Gate instead of Internal gate?

Any other Info is welcome that you think might be useful.

Thanks SM

 

[Guyana00]

Car breaths (exhales) easier so it ups the boost a bit.

Stock is different in different peoples' heads. Rebuilding with stock parts some people consider stock. Some people consider as soon as you touch original parts it's not longer stock. Anyways. Raising the boost a bit on a healthy motor is ok.

Sounds to me like he's saying the same thing, that you would reach 13lbs at around 2800rpm

 

[Turbo Habanero]

Car breaths (exhales) easier so it ups the boost a bit.

Stock is different in different peoples' heads. Rebuilding with stock parts some people consider stock. Some people consider as soon as you touch original parts it's not longer stock. Anyways. Raising the boost a bit on a healthy motor is ok.

Sounds to me like he's saying the same thing, that you would reach 13lbs at around 2800rpm

How can it achieve higher boost without adjusting the wastegate? I thought you had to adjust the wastegate spring.

 

[Turbo Habanero]

Somebody has to know what im talking about.

 

[Turbo Habanero]

Anyone??

 

[montego6500]

manual or elec boost controller?

 

[Turbo Habanero]

manual or elec boost controller?

Thats the thing the way its worded no boost controller just put the Dp on and it makes 13lbs by 2800rpm

 

[TurboStreetCar]

Easy. Give people time to respond.

You can see increased boost because turbines work off of a pressure ratio. There needs to be the proper ratio of pressure across the wheel to create the force to spin in. Since it's a ratio a smal change on one side equals a large change on the other.

A restrictive exhaust/downpipe creates the need for a much higher pressure pre turbo to create the same effect as a more open exhaust system.

The when an unrestrictive exhaust is fitted to a turbocharger it decreases the ammount of pressure required to spin the turbo so when the same pressure is attained in the manifold by the wastegate it causes the increase in boost.

You need to spend some time researching. These threads while are good questions they can all be answered with some time on the Internet.

Turbocharged vehicles have tons and tons of theory behind the cause and effect of what goes on. Spend some time reading up before buying parts.

www.turbobygarrett.com has a large section on information for turocharger theory.

Searching these same forums will yield a wealth of information.

Sometimes people don't read up on new theads or posts at all times. Give them a day or two before bumping.

 

[Turbo Habanero]

Easy. Give people time to respond.

You can see increased boost because turbines work off of a pressure ratio. There needs to be the proper ratio of pressure across the wheel to create the force to spin in. Since it's a ratio a smal change on one side equals a large change on the other.

A restrictive exhaust/downpipe creates the need for a much higher pressure pre turbo to create the same effect as a more open exhaust system.

The when an unrestrictive exhaust is fitted to a turbocharger it decreases the ammount of pressure required to spin the turbo so when the same pressure is attained in the manifold by the wastegate it causes the increase in boost.

You need to spend some time researching. These threads while are good questions they can all be answered with some time on the Internet.

Turbocharged vehicles have tons and tons of theory behind the cause and effect of what goes on. Spend some time reading up before buying parts.

www.turbobygarrett.com has a large section on information for turocharger theory.

Searching these same forums will yield a wealth of information.

Sometimes people don't read up on new theads or posts at all times. Give them a day or two before bumping.

I was under the impression that you needed a Boost Controller to adjust the stock boost with the stock wastegate.
I had did some looking around but couldnt find the anwser i needed..Also wouldnt putting this DP on my car that results in uping the boost possibly be a bad thing. If you are stock. (But running a MHG)

But i do thank you for the help

 

[TurboStreetCar]

A boost controller is required to adjust the boost level with all things bieng equal. If you change one thing it will effect others, changing the downpipe effects base level boost.

The stock wastegate is calibrated for the stock parts so the spring in the stock wastegate is going to regulate stock boost with stock parts. When you change parts and change the efficiencies of those parts it will effect the working everything else.

For instance a clogged cat or very restrictive exhaust system can cause such an extream change in pressure ratio boost would be unachievable.

 

[Turbo Habanero]

A boost controller is required to adjust the boost level with all things bieng equal. If you change one thing it will effect others, changing the downpipe effects base level boost.

The stock wastegate is calibrated for the stock parts so the spring in the stock wastegate is going to regulate stock boost with stock parts. When you change parts and change the efficiencies of those parts it will effect the working everything else.

For instance a clogged cat or very restrictive exhaust system can cause such an extream change in pressure ratio boost would be unachievable.

Oh I see. So do you think if i do full exhaust with a DDP i would be ok runing that boost

 

[TurboStreetCar]

If your stock, raise till fuel cut if You would like. That's why it's there. It'll turn the engine off before you hurt it.

And the TCCS runs so rich in stock form you'll be fine.

 

[Turbo Habanero]

If your stock, raise till fuel cut if You would like. That's why it's there. It'll turn the engine off before you hurt it.

And the TCCS runs so rich in stock form you'll be fine.

:icon_bigg ok Thankyou Sir