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SignUp Now!it can be done....... and is being done. way ahead of you.
the PROBLEM is...........
there is no carbon seal for a BB turbo. You WILL NOT get a BB turbo with a carbon seal. It would almost be pointless as a BB with a carbon seal will only spool as fast as a regular journal bearing. a carbon seal drags just enough to slow it down.
good point, but i cant see why it would be a big deal. when your off the throttle, and vaccumm is created, the vaccum will just pull through the turbo and the carb, not just on the turbo. the vaccum at the turbo should be very minimal.....
The only reason it might leak through the compressor piston rings is if they are worn and have a lot of play. With a new turbo, the seals should not leak, not much any how.....
Ill ask some of the guys at work and see what they say on this. Ill update you guys on monday. Maybe some type of check valve on the comp outlet vented between the carb and turbo inlet( or atmoshpere) can alleviate this vaccum pressure on the compressor end seal while still keeping the same vaccum coming in through the carb. ....
Incorrect. when you let off the gas, the throttle blades shut - causing a large vacuum on the turbo..and the Bottom of the carb..... not threw it.
hook a gauge up to it, come to full boost then let off the gas.... and watch the number it pulls.
to say they seal in one direction is incorrect. the rings hold oil in and boost pressure out of the crankcase. worn rings cause oil leaks and increased crankcase pressure. This can be from either the compressor or turbine end also.. [/QUOTE]these seals are designed for keeping the seal at low or no vaccum, thus they have less drag and tend to be more efficent. They seal in ONE DIRECTION.
this has been done, its very old tech. Made by ROTOMASTER or SHELBY/SPEARCO. it was a check valve system that allowed you to idle and cruise threw the carb only, and sealed those shut during boosted use. good luck finding one.... took me 6 years to find 2 basket case ones, to make one good one.
A.j.
right but we agree its not just on the turbo. the engine still has the need for air at vaccum, which must come through the turbo AND through the carb. So we are saying the same thing. Maybe to say the vacuum at the turbo is minimal is incorrect. it would be equal through the entire flow path.
to say they seal in one direction is incorrect. the rings hold oil in and boost pressure out of the crankcase. worn rings cause oil leaks and increased crankcase pressure. This can be from either the compressor or turbine end also..
i totaly understand what you guys are saying. i just refuse to beleive theres no way in hell to run a newer bb type turbo on a carb setup. Or Even a t3/t4 upgrade would be nicer than stock... i havent seen any pics or heard of anyone upgrading their stock units with an aftermarket turbo. anybody got some good links?
Why can't you weld in an extension to that concept of an adaption and run a blow off valve that would allow for decelleration? So what if you get some oil blow thru? How much are we talking about?
You guys aren't going to make this a smog test item are you? :biggrin:
Can't adapt a blow thru carb to such a set up?
Works on my supercharged Mustang just fine...
Got any pics of this?? i think if we put our brains to this we can make it work. i have gt30 sitting in my garage that i never got to use that im willing to mod for this. im just trying to find an old comp housing to chop up.
lol Yeah I kinda feel like the man here, lol I've been here many times in the past and used all the info here succesfully back when I had a stock drawthru setup
Nice stuff A.J.
I Found some things for you!!! like the other carburetor I couldn't find AND a lot other compressor covers, one more CHRA, carb plenums and an .82 a/r turbine housing and some other goodies. I still have your address and as soon as I can get some cash together I'll send this stuff out too you, I don't need it and I sold you all of the other stuff I had so your getting this stuff too.