What makes you pick a single or twin setup?
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Teching In
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What makes you pick a single or twin setup? im torn, ive been reading for the past few weeks, ive read numerous posts about singles and twins. How do you guys pick? i cant decide which route to go. Seems twins is the cleaner easier piping route, but Hooker also makes a nice turbo manifold crossover setup for twins that looks very stout. I have an LQ4 4l80 combo going into a 87 crew cab long bed dually. ill never tow with the truck, just a weekend cruiser with the old lady. its not a race car but id like to make some power, looking for more low end power rather than making it sing. ive read alot of twin gt45 setups and alot of single borg 400 framed builds.
thanks
thanks
On The Tree
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From: North Vanacouver , BC
I would just pick up a truck log manifold and would run a single small s475 , will spool quick and be fun in a heavy setup since the boost/torque will come on early . Twin GT45s will be dogs and especially for a street cruiser .The S475 will support close to 750 to the wheels and should be more than enough for street use.
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From: Norn Iron
Really neither is much different than the other. Just do whatever is easiest to fit on your car AND easiest for maintenance thereafter.
Some setups with crazy exhaust manifolds were you cant get access to plugs, or wires too close to hot stuff etc etc are just daft. Make life easy for yourself where possible.
Teching In
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I would be interested to see how many have gone through the calculations to determine optimum size and configuration prior to installing something or just bought one or two turbos based on internet chat and just stuck them on there.
Launching!
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with single you need manifolds, a crossover and turbine combination that will flow the volume of air that's going to be produced by your combo. cubes, boost, power, fuel type etc etc all come into that. generally that's relatively large and therefore will have a bit of lag. you cant expect a turbo that comes on boost at 3500RPM with (for example 400cubes, 20psi boost) to efficiently flow through the exhaust system efficiently at 7000RPM. however a turbo that comes on boost at 4800RPM most likely will flow efficiently to 7000RPM. as a rough example... T4 76/75 precision on that combo would likely represent something that would be on around 3500RPM and a T6 S488 with 110/96 turbine would likely represent the latter example.
with twins you only need to flow half that amount through each and as such the turbine can be smaller and less laggy. but it is more expensive.
when you're talking big cube, massive power one turbo may not physically flow enough air for the goals and no choice but twins is sensible. but that's at 2500hp plus and 500+cubes
with twins you only need to flow half that amount through each and as such the turbine can be smaller and less laggy. but it is more expensive.
when you're talking big cube, massive power one turbo may not physically flow enough air for the goals and no choice but twins is sensible. but that's at 2500hp plus and 500+cubes
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From: Norn Iron
Real world experience is better than some calculations based on hopefully correct info, for the variable that is "optimum"
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Teching In
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i agree.. i like hearing what others have done and what works. a book can tell you how it should or may work.. but thats not always the case. Hence field engineers who sometimes may have never done the actual field work.
Thread Starter
Teching In
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I would just pick up a truck log manifold and would run a single small s475 , will spool quick and be fun in a heavy setup since the boost/torque will come on early . Twin GT45s will be dogs and especially for a street cruiser .The S475 will support close to 750 to the wheels and should be more than enough for street use.
Thread Starter
Teching In
Joined: Dec 2018
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with single you need manifolds, a crossover and turbine combination that will flow the volume of air that's going to be produced by your combo. cubes, boost, power, fuel type etc etc all come into that. generally that's relatively large and therefore will have a bit of lag. you cant expect a turbo that comes on boost at 3500RPM with (for example 400cubes, 20psi boost) to efficiently flow through the exhaust system efficiently at 7000RPM. however a turbo that comes on boost at 4800RPM most likely will flow efficiently to 7000RPM. as a rough example... T4 76/75 precision on that combo would likely represent something that would be on around 3500RPM and a T6 S488 with 110/96 turbine would likely represent the latter example.
with twins you only need to flow half that amount through each and as such the turbine can be smaller and less laggy. but it is more expensive.
when you're talking big cube, massive power one turbo may not physically flow enough air for the goals and no choice but twins is sensible. but that's at 2500hp plus and 500+cubes
with twins you only need to flow half that amount through each and as such the turbine can be smaller and less laggy. but it is more expensive.
when you're talking big cube, massive power one turbo may not physically flow enough air for the goals and no choice but twins is sensible. but that's at 2500hp plus and 500+cubes
yeah not me, i got a basically stock lq4 not a 500 inch race motor. Hooker makes a nice single crossover setup designed for c/10s so that would make my hot side very easy.
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From: Norn Iron
Thread Starter
Teching In
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I built mine (twins) on purely the bragging rights to say "twin turbo".. Lol Sounds trivial but it just sounds cooler then single turbo IMO haha But it was much more expensive in the long run for sure.
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From: Norn Iron
Thread Starter
Teching In
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