73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Performance => Topic started by: arcountryboy on February 03, 2011, 06:21:58 am
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I was looking through Ebay last night searching for any deal and noticed the large amount of turbos on there for 350's. I have ran a supercharger once but I have never ran, nor seen to my knowledge a turbo on a 350 pickup. Ran one on a honda once though. I wouldnt put an Ebay turbo on my truck, but I was curious what you figure the gain would be with one? I know on my honda accord 4 banger it made a huge difference, but it took it a minute to spool up.
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Do a search on here, there are a couple threads on here about turbo installs. Capt even has one, though not sure if he finished or not.
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Neither are finished, work in progress right now.
With a properly sized turbo you will see no lag and huge increases in power. 100hp isn't out of the question on a SBC, but the motor itself needs to be setup to handle extra forces if you plan to crank it above 5lbs of boost.
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Ive heard of and seen 1 newer camaro(bubble body style, 90's i think?) Where they put 2 turbos, dual exhaust, above the rear axle and ported it back up to the intake and didnt need an intercooler! pretty smart. Also, if you do a blow through system you need to strengthen the internal parts of the carb, almost better to use a throttle body instead. And you could very easily destroy the rotating assembly with too much boost. Steel crank, forged pistons, strengthened carb, Proper sized turbo(s). Oil lines. An intercooler if you do manifold turbo(s). It takes a LOT of work. I wouldnt do it to any engine that has anything stock about it. I was looking into it during my build. It would be pretty sweet to do dual draw through turbos, like some of the quick :( bugs. Gives me chills just thinking about how beautiful the engine bay would look with 2 huge turbos staring at you when you pop the hood.
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We install those turbo kits, they were visioned and sold by STS of which I am a dealer.
They make great power.
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Ive heard of and seen 1 newer camaro(bubble body style, 90's i think?) Where they put 2 turbos, dual exhaust, above the rear axle and ported it back up to the intake and didnt need an intercooler! pretty smart
??? Huh?
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Ive heard of and seen 1 newer camaro(bubble body style, 90's i think?) Where they put 2 turbos, dual exhaust, above the rear axle and ported it back up to the intake and didnt need an intercooler! pretty smart
??? Huh?
There wasnt room in the engine compartment, so the turbos and wastegates were under the chasis towards the rear. It was on one of the powerblock shows.
1979-The reason they didnt use a intercooler was because of low boost, not because the turbos were so far back. That wouldnt matter.
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I had a turbo on an audi a4 with about 12-15 lbs of boost it wasn't real fast off the line but it was a sling shot on the top end. a lot of fun to drive and you learn to keep your rpms up to keep it wound. say if your going to pass someone you'll down shift just a little earlier.
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Beastie, I though they didnt need an intetcooler because they didnt have the heat of the manifolds/engine to cool down.
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Havent seen the episode for awhile.
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I'd love to Turbo one of our trucks, I'm thinking twins, maybe the billet housing ones from Nelson super cars, they can be clocked for symmetry, cause if yer gonna spend the money, why not make it pretty too!
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Powerblock Trucks put a tailpipe turbo on their Lightning, real clean look. Stacey David's Gearz also put tailpipe turbos on a C6 Corvette. That would be the only way I would run one.
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The ones I sell are the same ones Powerblock put on the Lightning
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This trucks pretty cool!
http://www.youtube.com/watch?v=24v5gzSJ6N8&feature=autoplay&list=SP89FAB5C9B436487B&index=4&playnext=2
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Turbo at the back of the exhaust is gonna be major lag and not nearly as efficient! You lose a huge amount of the heat coming out of the exhaust ports and lag is directly proportional to the distance the turbos are from the ports. Not saying it won't make boost, you will just be able to count it down with the minute hand on your watch! :D
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Definitely not the case Erik. The turbo truck we have has no lag, you stomp it and the power is there just like any other turbo'd vehicle. Lag is directly proportional to improper turbo sizing.
Moving the turbo allows you the ability to skip and intercooler if you want since the air is already cooled. If you factor in all the "distance" that a intercooler would add you have the same amount of piping, except half of it isn't head soaked.
There has been a lot of doubt about these from people that don't understand them, over the past 8 years, STS pretty much disproved all of this. Mostly in the first 2 years.
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I've read that buying the cheap ebay turbos and rebuilding them with a top brand kit can make it worth while. At least way more reliable! A military buddy of mine custom built his using that method. It's been on his 72 cutlass for about 3 yrs no problems.
Is is possible to run twins this method? I never thought about the rear mount turbo! They just look soooo nice under the hood!
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This trucks pretty cool!
http://www.youtube.com/watch?v=24v5gzSJ6N8&feature=autoplay&list=SP89FAB5C9B436487B&index=4&playnext=2
That thing is unreal!
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Yeah we run rear mount duals on several cars.
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As Chris stated...Mine is a "work in process also"
http://forum.73-87chevytrucks.com/smforum/index.php?topic=15196.0
Here's a clip of Earl's truck...I met him a couple years ago on DragWeek. It has mid-mounted turbos & a big air to water cooler in the front of the bed. It's gone in the 8's. He's a really nice guy & does some great work. Lorne
http://www.youtube.com/watch?v=fLSNLwERIfQ&feature=related
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This has really got my attention now. I think I might take a crack at it in the future. LQ9 is going into my 57 and my 85 will get the big block swap. I'm havin problems with the 350 thats in it now so I got ALOT of swaps before I get started.
Whats the best method for install? Blow through carb or will one of those EZ efi kits work? I know the intercooler is avoided but what about the wastegate if its an automatic?
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You need a wastegate but a blow off valve isn't really needed if your running a auto trans. The rear mount turbos are pretty sweet but in my car I'd be afraid something from the road would hit it. I'm debating on building a front mount setup on my lsx swap in my trans am should be fun if I ever do it. You can still intercool the rear mounted setups and I've seen some that put exhaust wrap on the downpipes all the way to the turbo.
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The research I've done leads me to feel that a blow-off valve should be used on all turbo systems regurdless of the automatic transmission. Here's why: When your "in the throttle" the turbine is spinning very fast & when you lift off the gas, the hole where the pressure was going is now closed but the charge tube is still full & the turbo is still filling it...this pressure has to relieve itself through the turbo which doesn't help shaft play, ect. With a BOV in place, the charge tube full of pressure is vented into the atmosphere without any ill effects. For the cost of one I think it's the way to go, needed maybe not, but is the way to go. My Two Cents, Lorne
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Without a BOV, when you let off the throttle it can and usually will cause the turbo to surge, which puts a lot of stress on it and will cause it to fail sooner.