Twin Turbo’s?
I ♥ Acer
Joined: Mar 2003
Posts: 2,199
From: United States
Twin Turbo’s?
Where'd I say that it's free? Backpressure always affects flow, because backpressure is a restriction of the gases, which when restricted don't flow as well.
10 psi higher than exhaust manifold....that would be 35+psi<img border="0" src=smileys/smiley2.gif border="0">
10 psi higher than exhaust manifold....that would be 35+psi<img border="0" src=smileys/smiley2.gif border="0">
Joined: Aug 2005
Posts: 2
RE: Twin Turbo’s?
I don't really know how old this page is but there is a company called Vecco http://www.vecco.com/ I have the the level 3 twin turbo kit im my car and I daily drive it everyday to college and to work!. They are safe a reliable and about the Lag thing.. you might as well throw lag out of the window. My engine is a 302 (5.0) so that means I have 2.5 liters going per turbo. I know 4 cylinders that are 2 liters that have bigger turbos then me and they have little lag, Plus I opted for the ball bearing umgrade so this helps.. i have managed to pull 679 hp with only eagle rods/pistons, metal head gasket, exedy clutch. I have no cams or crank upgrades!! I highly recomend then Thanks for taking time to read this. I have pics to if you'd like to see
2nd Gear Member
Joined: Aug 2005
Posts: 366
From:
RE: Twin Turbo’s?
i have been reading this for a while and i am yet to see any mention of sequencial turbo. its true u could get as much power from a single large turbo and it is much easier to work with. a sequencial system would use a quick spool small turbo to give a small kick in the pants till about the time the larger turbo is operating, this has been used in many factory cars like some skyline gtrs and a few models of supras. the use for a twin turbo set up would be pretty bad if u lived in a high pop area as a large city or using the car as a daily driver. the wear on the engine and the amount of money it would take to fab everything and build the block up to withstand all that psi. for a daily driver i would just get a single turbo with a farely quick spool but held some boost into the midrange to give u power when and where u want it. not every1 launches from a light at 4500 and does 150 on a road.
and also if u buy a turbo from a company lik greaddy or apexi how does that make u rice, sure many of there kits are made for ricers, but the quality of the turbo tech coming from accross the see is second to non i have many friends turbos from hks and once they are dyno tuned the are very reiable. but hey just my .02
and also if u buy a turbo from a company lik greaddy or apexi how does that make u rice, sure many of there kits are made for ricers, but the quality of the turbo tech coming from accross the see is second to non i have many friends turbos from hks and once they are dyno tuned the are very reiable. but hey just my .02
5th Gear Member
Joined: Jul 2003
Posts: 3,451
From: United States
RE: Twin Turbo’s?
ORIGINAL: 5.0family
i have been reading this for a while and i am yet to see any mention of sequencial turbo. its true u could get as much power from a single large turbo and it is much easier to work with. a sequencial system would use a quick spool small turbo to give a small kick in the pants till about the time the larger turbo is operating, this has been used in many factory cars like some skyline gtrs and a few models of supras. the use for a twin turbo set up would be pretty bad if u lived in a high pop area as a large city or using the car as a daily driver. the wear on the engine and the amount of money it would take to fab everything and build the block up to withstand all that psi. for a daily driver i would just get a single turbo with a farely quick spool but held some boost into the midrange to give u power when and where u want it. not every1 launches from a light at 4500 and does 150 on a road.
and also if u buy a turbo from a company lik greaddy or apexi how does that make u rice, sure many of there kits are made for ricers, but the quality of the turbo tech coming from accross the see is second to non i have many friends turbos from hks and once they are dyno tuned the are very reiable. but hey just my .02
i have been reading this for a while and i am yet to see any mention of sequencial turbo. its true u could get as much power from a single large turbo and it is much easier to work with. a sequencial system would use a quick spool small turbo to give a small kick in the pants till about the time the larger turbo is operating, this has been used in many factory cars like some skyline gtrs and a few models of supras. the use for a twin turbo set up would be pretty bad if u lived in a high pop area as a large city or using the car as a daily driver. the wear on the engine and the amount of money it would take to fab everything and build the block up to withstand all that psi. for a daily driver i would just get a single turbo with a farely quick spool but held some boost into the midrange to give u power when and where u want it. not every1 launches from a light at 4500 and does 150 on a road.
and also if u buy a turbo from a company lik greaddy or apexi how does that make u rice, sure many of there kits are made for ricers, but the quality of the turbo tech coming from accross the see is second to non i have many friends turbos from hks and once they are dyno tuned the are very reiable. but hey just my .02
A twin turbo engine will not wear any faster than a single turbo engine. & on that note if you maintain your engine by changine the oil every 3000 miles & don't run a super lean a/f mixtures causing the exhaust to get super hot your engine will see around 95% of the same engine without the turbo(s). So if you bought a new car that would reach 100,000 miles before breakdown, with a turbo or two on it that would mean it would get to 95,000 miles. Some people I know still have their car running good after 250,000 miles, thats 237,500 miles if he would have slapped a turbo on there when he first bought the car.
& you do not have to build your engine to handle boost from a turbo. You have to build your engine if you plan on running over 12psi. Most people don't. I ran 12psi on my car with stock internals. It lasted 2 years & is still going without failure.
Joined: Aug 2005
Posts: 2
RE: Twin Turbo’s?
I agree with FOXGT, I think the only reason that those engines come with a sequential setup is because they are inline... i think it would be kinda hard to run a sequential setup on a v motor. Its also true that you can get very good horsepower without pushing much boost. My car never runs higher then 11 psi!! A twin turbo setup can produce more power than a single turbo setup at the same boost!! This is because the twin turbo setup can flow more air than the single turbo setup!!! I don't really do drag racing too much, im into the autoX world and my mustang performs really well at low rpm's and can bearly feel the lag.!!!!! go twin turbo!!!!!
Unfortunately this browser doesn't allow pic posts for some reason But I will be happy to mail them to you guys!!
Unfortunately this browser doesn't allow pic posts for some reason But I will be happy to mail them to you guys!!
5th Gear Member
Joined: Jul 2003
Posts: 3,451
From: United States
RE: Twin Turbo’s?
ORIGINAL: Bluehydro8
I agree with FOXGT, I think the only reason that those engines come with a sequential setup is because they are inline... i think it would be kinda hard to run a sequential setup on a v motor. Its also true that you can get very good horsepower without pushing much boost. My car never runs higher then 11 psi!! A twin turbo setup can produce more power than a single turbo setup at the same boost!! This is because the twin turbo setup can flow more air than the single turbo setup!!! I don't really do drag racing too much, im into the autoX world and my mustang performs really well at low rpm's and can bearly feel the lag.!!!!! go twin turbo!!!!!
Unfortunately this browser doesn't allow pic posts for some reason But I will be happy to mail them to you guys!!
I agree with FOXGT, I think the only reason that those engines come with a sequential setup is because they are inline... i think it would be kinda hard to run a sequential setup on a v motor. Its also true that you can get very good horsepower without pushing much boost. My car never runs higher then 11 psi!! A twin turbo setup can produce more power than a single turbo setup at the same boost!! This is because the twin turbo setup can flow more air than the single turbo setup!!! I don't really do drag racing too much, im into the autoX world and my mustang performs really well at low rpm's and can bearly feel the lag.!!!!! go twin turbo!!!!!
Unfortunately this browser doesn't allow pic posts for some reason But I will be happy to mail them to you guys!!
Running a sequential setup on a twin bank engine is a waste of money in the eyes of most turbo builders. You will have to run a crossover pipe between the two pipes before the headers get to the turbo. With routing the plumbing together then splitting back into two, you are creating headers that don't flow as well defeating the purpose of the twin setup. Header/pipe design is a major factor in power output of a turbo system. It could be the difference between having a 400hp car or a 700hp car. Most turbo companies out there don't look as if they put hardly any research into their pipes.
Last edited by FoxGT; Sep 23, 2020 at 04:13 PM.
Joined: May 2006
Posts: 1
RE: Twin Turbo’s?
I'm not sure if this was asked yet or not. With the twin turbo setup, a smaller turbo leading to a bigger one, would the smaller one be getting any more abuse at the higher RPM's when the big one comes in to effect?
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