Anybody doing this? Run a turbo with no wastegate to improve response and let a relief valve set a desired boost level keep the boost in check?

 

Sounds like an Over-Reved turbo is what will happen. Pop-Off valves are normally for security measures only and to prevent tampering with boost in events that have a limit.

Chris

 

You'll damage your turbo within seconds under WOT.

thewird

 

Chris! Como va ese invento con el RX-8? Vi las fotos de tu nuevo setup. Oye y no te ha dado con portearlo a ver como responde?

My no-wastegate idea came from thinking about how a wastegate works by slowly opening until full open to bleed off exhaust energy and control boost. I thought this adds lag in response, at least with larger turbos and I thought keeping the exhasut energy there and instead bleed off the compressed charge can make for faster response.

A pop-off valve flutters at the desired boost level, say 20 psi, and keeps the turbo spinning. It may be a bad idea for the street but good for competition purposes?

 

By doing that your turbo would be spooling to infinity until it dies which will be very quickly since the turbo will be receiving 100% of the exhaust energy and would be leaking pressure on the compressor side making it even easier for the turbo to spin faster and faster. I'd give it a few seconds at WOT before the turbo dies lol.

With most EBC's, you can tell the wastegate to stay closed until X PSi. Even the Profec B can do this. That's one of the advantages of an EBC over a MBC.

thewird

 

Thats what boost controllers are for! They monitor your manifold pressure and keep the wastegate CLOSED till it's close to the desired boost pressure then opens it. Its purpose aside from being able to dial in a desired boost level is to keep the wastegate from slowly cracking open slowing down response.





NO, its a bad idea period. Pop off valves are a safety measure and only are supposed to open if you OVER BOOST, at which point hopefully the driver has enough sence and would STOP boosting his car and fix the over boost problem and thank his lucky stars he installed a pop off valve and saved his engine.

Its a bad idea period, the results would be an over spun turbo which would soon burn out it's bearings and then it itself (destroy blades) which then would be bits of compressor fins into your engine.

~Mike...................

 

Hola,
El motor q instale ahora esta porteado, le puse dowel pins y le instale los apex seals q estoy haciendo/vendiendo atravez de mi compania.

Veremos como y cuanto mejora. Te dejare saber.

Chris

 

No its a bad idea all around. Even if you found a turbo that could hold up to the extra high rpms (over spinning) you would lose power because the intake temps would sky rocket and the turbo would be way out of it's efficiency range. So its a bad idea for any car whether its for street or one time down the strip