twin turbo cobalt
12-24-2012, 03:49 PM
#57
i'll post what i did in another thread.
"twins just are not necessary. the amount of work you'd have to put in to mount them up vs running a properly sized single turbo just wouldn't be worth it."
"the only way i could see doing twins. they would have to be terribly small. so small that even with both of them, peak power just wouldn't be there. one mounted on the manifold to get most of its spool from cylinders 1 and 2. and the other mounted by the tstat housing getting most of its spool from 3 and 4. compressor housings on the timing chain and trans sides respectively. with the turbine sides in the middle with a shared downpipe connected in a way to prevent the exhaust coming out and flowing directly at the other turbine housing.
and even IF you could get that to work. a single 252 or 256 will still give you a crazy power band with the peak to go with it. in a simple bolt on kit with none of the custom fab work, other than modifying something to your liking, that would come with a twin setup"
"twins just are not necessary. the amount of work you'd have to put in to mount them up vs running a properly sized single turbo just wouldn't be worth it."
"the only way i could see doing twins. they would have to be terribly small. so small that even with both of them, peak power just wouldn't be there. one mounted on the manifold to get most of its spool from cylinders 1 and 2. and the other mounted by the tstat housing getting most of its spool from 3 and 4. compressor housings on the timing chain and trans sides respectively. with the turbine sides in the middle with a shared downpipe connected in a way to prevent the exhaust coming out and flowing directly at the other turbine housing.
and even IF you could get that to work. a single 252 or 256 will still give you a crazy power band with the peak to go with it. in a simple bolt on kit with none of the custom fab work, other than modifying something to your liking, that would come with a twin setup"
12-25-2012, 01:57 AM
#58
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i'll post what i did in another thread.
"twins just are not necessary. the amount of work you'd have to put in to mount them up vs running a properly sized single turbo just wouldn't be worth it."
"the only way i could see doing twins. they would have to be terribly small. so small that even with both of them, peak power just wouldn't be there. one mounted on the manifold to get most of its spool from cylinders 1 and 2. and the other mounted by the tstat housing getting most of its spool from 3 and 4. compressor housings on the timing chain and trans sides respectively. with the turbine sides in the middle with a shared downpipe connected in a way to prevent the exhaust coming out and flowing directly at the other turbine housing.
and even IF you could get that to work. a single 252 or 256 will still give you a crazy power band with the peak to go with it. in a simple bolt on kit with none of the custom fab work, other than modifying something to your liking, that would come with a twin setup"
"twins just are not necessary. the amount of work you'd have to put in to mount them up vs running a properly sized single turbo just wouldn't be worth it."
"the only way i could see doing twins. they would have to be terribly small. so small that even with both of them, peak power just wouldn't be there. one mounted on the manifold to get most of its spool from cylinders 1 and 2. and the other mounted by the tstat housing getting most of its spool from 3 and 4. compressor housings on the timing chain and trans sides respectively. with the turbine sides in the middle with a shared downpipe connected in a way to prevent the exhaust coming out and flowing directly at the other turbine housing.
and even IF you could get that to work. a single 252 or 256 will still give you a crazy power band with the peak to go with it. in a simple bolt on kit with none of the custom fab work, other than modifying something to your liking, that would come with a twin setup"
Properly setup compounds wouldn't push the motor any harder and make more peak power with better spool than a single turbo big enough to make that same peak number.
It's not that hard to route a 60mm gate from before the manifold charger back into the exhaust and remote mount a 66mm (for example) with a scavenge pump for the return line and compound your air charge into the compressor inlet of the 50 trim. Compounds don't just work well on diesels the math is still the same with gas just smaller wheel diameters usually.
But for the average Joe a single bolt on turbo is the way to go. Most don't have the patience or drive to tackle something like that. I've often pondered the idea but i'm still searching for trans reliability.
12-25-2012, 02:07 AM
#59
but thats not what i'm saying. i'm not saying they don't work. i'm saying they aren't worth it. not on our cars. a single turbo, s252 or s256 just for example. will be a far better time/money/install/power option on our cars vs anything else.
12-25-2012, 02:55 AM
#60
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I'm pretty sure exsoccer and myself are on the same page, single larger turbo and proper setup and you'll make good power and save money. Compound turbo setups and twin charge setups are flipping retarded on 4cyl cars and a complete waste of money! Oh and talk about over stressing your engine lol!
12-25-2012, 03:00 AM
#61
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These are small displacement 4cyl vehicles we are talking about. IMO supercharging the 2.0 was a terrible idea from the start! Gm took the ecotec from sabb way back when, took the turbo off, slapped a supercharger on and said merica! The lnf is actuall a very old sabb engine design as well.
Back to point, if you twin charge or compound turbo a small displacement 4cyl you are mentally retarded on so many levels with more dollars than sense
Back to point, if you twin charge or compound turbo a small displacement 4cyl you are mentally retarded on so many levels with more dollars than sense
12-26-2012, 08:21 PM
#65
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I'm pretty sure exsoccer and myself are on the same page, single larger turbo and proper setup and you'll make good power and save money. Compound turbo setups and twin charge setups are flipping retarded on 4cyl cars and a complete waste of money! Oh and talk about over stressing your engine lol!
Are you feeling special because you think you're on the same page as exsoccer? haha One more thing, how do you figure properly built compounds "over stress" your engine?
Again I agreed with this statement. Why everybody is so closed minded on this site, and so quick to shoot down everything they think they know, just because of some bs they read on the internet and not because they have real life experience, is beyond me. I must be flipping retarded Ex
12-27-2012, 03:36 PM
#67
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You must not have read my whole post... So let me clear things up here quick. You're saying compounds are only beneficial to certain sized engines? Or just anything above 4 cylinders?
Are you feeling special because you think you're on the same page as exsoccer? haha One more thing, how do you figure properly built compounds "over stress" your engine?
Again I agreed with this statement. Why everybody is so closed minded on this site, and so quick to shoot down everything they think they know, just because of some bs they read on the internet and not because they have real life experience, is beyond me. I must be flipping retarded Ex
Are you feeling special because you think you're on the same page as exsoccer? haha One more thing, how do you figure properly built compounds "over stress" your engine?
Again I agreed with this statement. Why everybody is so closed minded on this site, and so quick to shoot down everything they think they know, just because of some bs they read on the internet and not because they have real life experience, is beyond me. I must be flipping retarded Ex
12-27-2012, 03:44 PM
#68
Most people cant even apply a single turbo to the ground or run good times with them. And honestly most have no idea how 400hp which is reachable on just one turbo feels on our cars or any car for that matter.
This idea made me laugh really hard and is completely lame and stupid all at the same time.
Stick with a single turbo.
This idea made me laugh really hard and is completely lame and stupid all at the same time.
Stick with a single turbo.
12-29-2012, 08:22 AM
#73
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I honestly don't see a point of twin turboing a 4 cylinder... money could be invested into much better **** that will be more stable and put out better results.
in before because racecar
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