Help Needed With My Thermal Design Project - Designing a Turbo System for the Slant!
Bill, Thanks for all of the pictures and if you don't mind, a few of them will end up in my report and presentation. I have been reading your posts in all of the other turbo slant threads and I can tell that you have a lot of knowledge to pass on. I really like your header design, what type of metal was it made from? I think for this design I will just modify the factory manifold to keep costs low.
When it comes to the carburetor, would I have to have one modified to work with a turbo or is there something that I could just buy and use straight out of the box? For the purpose of this project I would like to be able reference a specific item that I could pick from a catalog or website.
Thanks for the kind words.
Modified carbs are the most ticklish part of a blow-thru system, but they are a MUST, insofar as having a properly-modified fuel delivery system that is part and parcel of the turbo package, itself. You can buy them "off the shelf" (expensive,) modify them yourself (iffy, but possible; lots of info available relative to doing this, online) or hire somene who is familiar with the drill, to do it for you (can be almost as expensive as an off-the-shelf model, but not usually.)
Please, use any and all the pictures I have posted for your report; But, be aware that I am anything BUT an expert when it comes to this turbo business. For example, as nice as that header looks, I am of the opinion now, that it has tubes that are too long, and gives the enclosed heat too much of an opportunity to dissipate before it arrives at the turbo, and will waste a significant amount of heat/energy.
You would know more about that then I would, of course. The headers are mild steel, and ceramic-coated. The guy at the coating place advised us against wrapping them; said it would be
very bad for them.
A similar, but more efficient, header that Aaron made is much shorter, more direct, and an overall better design than this one in my opinion. I don't have the URL for his pictures, but he monitors this thread pretty closely, so maybe he'll offer to show that header to you.. It's awesome, I think!!!:cheers:
The intake manifold we are using is inappropriate for a turbochargerd motor, I found out... too late. We had already designed the headers for it, and are pretty much stuck with it. I bought an Offy and a Clifford manifold to try to replace it, but neither of them will work with these headers. We ground all the way through one Clifford intake runner and beat the offending exhaust tube until it was obvious that those two parts were just not going to work together.:sad7:
My source of dissatisfaction with this Hurricane ($400.00) intake manifold comes from advice offered by a friend of mine who is a professional consultant... makes his living designing turbo systems for automobile manufacturers; when he talks, I listen. He said that it is an excellent manifold for a normally-aspirated engine, but just won't work on ours. He said we'll add 10 pounds of additional boost, and won't make any more power due to the excessive (for this application) runner length.
Down the road, we'll replace both the intake AND the header, I am sure, but we want to get it running, first.
So, we're pretty much flying blind here, but we learn as we go.:banghead:
We're down to a couple of weeks until it's operational.... we hope.
Stay tuned! :) and, thanks for your interest!!!
