The turbo BBB has been around for a little bit and I have no idea where I could find a set of headers for a turbo 455...where do you guys get them?? Any for sale?? Thanks Justin
I agree, Mark builds turbo manifolds for the Turbo 455 and I am sure you could route them together for a single turbo setup... I suggest going twin though! Don't you want the nice dual exhaust rumble? A single makes for a tough routing of the down-pipe and also more complicated routing to get one exhaust to the front of the other side of the engine. The only way to get a tube header the way you are describing is a custom made set of headers that would likely cost $1300 if you had to hire someone to build them.
My buddy has the Burton set up, personally the craftsmanship is a bit rough for my tastes. If I were run a turbo, I'd try shorty headers and flip the flanges to either point both outlets forward for a twin set up or mount the driver side normally and run a cross over to the passenger side and flip that side. I can't recall but I think that method might need two driver shorty headers. HTH
I remember hearing that the log manifolds do well but I cannot figure any way that they would work better (other than price) than a good set of headers. Define "rough"?
You are correct in your thinking. Tube headers work better for performance than log manifolds. Log manifolds are easier and cheaper to build and have far less clearance problems under the hood. They work ok for low boost applications but are still the least efficient design. Paul
The finish product looks amatuer, box tubing, welds, etc... Maybe the quality has gone up since my buddy has got his. Once in the car you can't really tell but I still don't care for the quality.
Basically, you will have to build your own to fit your desired application. I have to disagree on the log manifold statement. Yes in theory they are less efficient, but in a street driven turbo car you will always have back pressure, so a nice set of tube turbo headers will not flow like they do on a naturally aspirated car. The diesel boys are making over 1,000HP at 100PSI of boost with LOG manifolds. Here are a few pics of what I built. I run a stock manifold on the left side with a crossover pipe to the manifold I built on the right side. Good luck with it. Thanks Brent
Brent I like what you did on your engine. Very creative using a stock manifold as part of the system. We want to encourage the use of turbochargers so whatever it takes to get the job done is great. I agree that the exhaust system for low boost street application is not critical and a person should use whatever is easiest for them to put a turbo system together. Our last 2 turbo engines produced 2400 hp on methanol and the other produced 2700 hp on gas. We data log the exhaust pressure right before the turbine housing at the end of the header. When we looked at the unfiltered data we could clearly see the exhaust pulses. With long tube headers, the low pressure pulse that follows the blowdown high pressure pulse is equal in amplitude and actually goes to zero pressure or almost a vacuum. So the header acts exactly as it would for N/A conditions only the average pressure is higher. The amount of exhaust pressure is affected by the A/R ratio of the turbine housing and the overall efficiency of the whole turbo system which includes the intake side and the amount of intercooling. As far as a multi-staged turbo, direct cylinder injected diesel engine, that is a different story. Paul
