Thanks man. Always just hit me up when you're ready and we'll have fun with it

 

Does that setup have internal and external wastegate??? What is the valve after the turbo? Bypass??

 

Very nice writeup!!

I'm really confused because I was reading all the stuff yumaverik posted about this kit and he was so excited about it and full with good words about switzer and now it sounds like the complete opposite for me!!

When I saw the pics of the kit I saw that everything looks like poor quality an very cheap. I dont know how the external wastegate should work? looks for me like it sits after the turbo?

 

It does have internal and external wastegates on the kit. The internal gates are "bypassed" though. They are blocked open so the gates can never close.

 

It's also odd to me to put the wastegates behind the turbo. I have to go with the "well it worked for Switzer mentality on this one". At best, I'm sure they are less efficient than if they came off the header... They are huge wastegates X 2. I would have much rather seen each gate come off the header and feed back into the exhaust at the cat pipe. I hate wastegates going to atmosphere (The wastegate exhaust just having a pipe open to the outside of your car). You basically always have a 1 1/2" exhaust leak at all times under throttle. Cool if you're 16 years old, not so cool at my age.

 

Good info buddy! Looks like you are making progress! I am no expert, but if you run across a question, feel free to ask, and I will help you or possibly find the info for you if I can.

Good luck to you!

DC

 

I look forward to seeing this car in action. Sounds like it will be very sorted when complete. OP just curious what motorsports activities you participate in (track, drag racing, etc)?

 

Going to be going through a similar process in a month or so.. should be interesting.
my setup is not really a "kit", so will probably run into more road blocks.


thanks for posting, and keep them coming.

 

Glad to see you getting it going!

 

On alpha you have to block the internal wastegate port closed to run external wastegates, since the valve will try to open over spring pressure. The HUGE PROBLEM I see is you can not put a wastegate after the turbo!! A wastegate is suppose to bleed pressure from the exhaust to meet spring pressure or what is offset by the boost controller. What I think Switzer was using the external wastegates for is an exhaust cutout? once it hits spring pressure it opens the valve to allow free flowing exhaust out of them. Not the best way to do so, I think they used the internal wastegates for controlling boost. If the internal wastegates are not hooked up the turbo will make as much boost as it wants.

Matt

 

I'm going to look at the turbos closer tonight. I hadn't given boost control much thought up until now (other than grabbing a small boost solenoid). I was sure when I looked at the Alpha turbos before I installed them that the gates were wedged open. Switzer installed spacer blocks and the rods are rock solid. You could very well be right on what Switzer was doing on the waste gates as an exhaust bypass. Add another oddity to the E911 list.

 

The exhaust cutout makes perfect sense but is definitely a strange way to do it. I wouldn't have thought that it would make enough pressure to overcome the spring but I guess it could.

 

With the Syvecs all you need is a boost solenoid and you will be golden, I do recommend the 4 port over the 2 port kind. If the Valve is wedged open it should bleed a lot of boost, causing low boost and very slow spool if at all. Mine we are wedged closed, but my externals are on the headers.


I think they hooked a vacuum line up to it so it would be boost activated.

 

Swole, I'm sure as to no surprise to you, you are right wastegates are exhaust bypass and internal gates are active. I'm not sure what springs are installed in the internal gates but the springs are pretty strong.

Not sure if I'll use the wastegates to bypass the exhaust. Does a catless exhaust have that much restriction? Is the noise Vs. Hp worth it?

 

The alphas use a 14.7lb/1bar spring, as for the exhaust being restrictive that I am not sure. I would think past the 700whp mark you would want to bypass the exhaust so you wont have to much back pressure.

Matt