Turbo???
Elder User
Joined: Aug 2003
Posts: 693
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From: Tuttle, Oklahoma
I don't think that would work, unless you used both passenger sides and somehow flipped them upside down so the turbo would be on top so it would clear any belts or whatever. I bet there are turbo manifolds available for these motors. I mean, you can get a twin overhead cam setup, so there has GOT to be a set of manifolds out there.
Junior User
Joined: Jan 2005
Posts: 71
Likes: 0
From: lawrence
yeah,the guy that had the mark7 with the 390 had the worst time getting it put in.he said he was first off wanting a 460 in it.when that didn't work he went to the 429.that wouldn't work without replacing the entire front end and reworking the frame a bit.i told him he could get a good 350 to 500 hp out of a 351 or 360 depending on how hw had it built up.his reply was he wanted "a big engine".anyways i'll work on getting a picture of my engine posted.
Mountain Pass
Joined: Sep 2000
Posts: 233
Likes: 0
From: Eagle River, Ak
Go here: http://www.toohighpsi.com/
Look at the Twin Turbo Capri. That was a Carbed 351w with junkyard turbo's.
A muffler mounted turbo would have very long spool up times.
Look at the Twin Turbo Capri. That was a Carbed 351w with junkyard turbo's.
A muffler mounted turbo would have very long spool up times.
Cargo Master
Joined: Jul 2003
Posts: 2,740
Likes: 20
From: Four Oaks, NC
"A muffler mounted turbo would have very long spool up times."
Yes, plus you would lose a lot of the heat and velocity that you get from having the turbo right off the exhaust manifold. I don't think that would be very efficient.
Yes, plus you would lose a lot of the heat and velocity that you get from having the turbo right off the exhaust manifold. I don't think that would be very efficient.
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Senior User
Joined: Dec 2003
Posts: 479
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isnt it,the less heat the better?well anywho,i have been searching forever and cant find anyone who sells"just" the manifolds,and im sure flipping the manifolds wil work,but i first wanna be sure of that no one makes them
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Senior User
Joined: Dec 2003
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Brett Foote
New User
Joined: Feb 2005
Posts: 24
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From: Texas
Originally Posted by Cracker289
"A muffler mounted turbo would have very long spool up times."
Yes, plus you would lose a lot of the heat and velocity that you get from having the turbo right off the exhaust manifold. I don't think that would be very efficient.
Yes, plus you would lose a lot of the heat and velocity that you get from having the turbo right off the exhaust manifold. I don't think that would be very efficient.
Junior User
Joined: Jan 2005
Posts: 71
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From: lawrence
i just sold my truck for 6k.anyways there was discussion about the maintanence differences of the turbo and the supers.the turbos ive worked do not require a connection to the engine oil supply.there is no connection to it for a oil supply.
Elder User
Joined: Dec 2003
Posts: 534
Likes: 0
From: Hoquiam, WA
Congrats on selling your truck. Did you get any pics for memorabilia? I still want to see the supercharged motor.
Still waiting on the pics of the 390 in the Mark.
Every turbo'd vehicle I've been around has an oiling system.
Even the STS rear mount turbo has an oiling system.
What vehicles have you worked on that don't require an oiling system? I'd like to know, just in case I have to deal with one.
Patrick
Still waiting on the pics of the 390 in the Mark.
Every turbo'd vehicle I've been around has an oiling system.
Even the STS rear mount turbo has an oiling system.
What vehicles have you worked on that don't require an oiling system? I'd like to know, just in case I have to deal with one.
Patrick
Posting Guru
Joined: Mar 2004
Posts: 1,099
Likes: 0
From: Destin/Ft. Walton Beach,
Yeah, I knew that Street. The velocity is the same all throughout the exhaust system, provided the tubing is the same size. Losing some of the heat doesn't hurt a thing, since the heat has nothing to do with spinning the turbo. Even plain
cool air from an air compressor will spin a turbo, and fast too. It'll probably live longer with less heat, in the configuration mentioned. I hope your 4.2 will hold up to that extra power. I'm not too thrilled about that engine, so I'm doubtful. I hope you prove me wrong.
cool air from an air compressor will spin a turbo, and fast too. It'll probably live longer with less heat, in the configuration mentioned. I hope your 4.2 will hold up to that extra power. I'm not too thrilled about that engine, so I'm doubtful. I hope you prove me wrong.
Cargo Master
Joined: Jul 2003
Posts: 2,740
Likes: 20
From: Four Oaks, NC
The way to see how much the long tailpipe hurts the overall performance would be to dyno it after you have finished, and then redo the system with the turbo right off the header or manifold. Of course thats too much trouble and expense just to make a point and your way is still much better than stock, so enjoy!
Mountain Pass
Joined: Sep 2000
Posts: 233
Likes: 0
From: Eagle River, Ak
When it looses heat it looses volume and thus pressure and therefore spins the turbo slower.
A remote mounted turbo may work fine for youe app, but one mounted farther upstream will work better.
A remote mounted turbo may work fine for youe app, but one mounted farther upstream will work better.
Posting Guru
Joined: Mar 2004
Posts: 1,099
Likes: 0
From: Destin/Ft. Walton Beach,
Velocity, not pressure, is what spins the turbo. The turbo spinning then CREATES
pressure in the form of boost. The exhaust velocity is the speed of the exhaust exiting the exhaust system. How can it slow down? If the exhaust moved slower at the end of the exhaust system then at the beginning, then it would eventually build up, and choke off the engine. True, the volume is a little less, since the cooler molecules are more dense, but the measurable velocity can't change. Think about this one, too. What would spin a turbine better? Less dense warm air, or more dense cool air?
pressure in the form of boost. The exhaust velocity is the speed of the exhaust exiting the exhaust system. How can it slow down? If the exhaust moved slower at the end of the exhaust system then at the beginning, then it would eventually build up, and choke off the engine. True, the volume is a little less, since the cooler molecules are more dense, but the measurable velocity can't change. Think about this one, too. What would spin a turbine better? Less dense warm air, or more dense cool air?