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Discussion Starter · #1 ·
Ok I was thinking about my way of putting in dual exhaust ports on my car by cutting a second pipe at the L bend of the first pipe and running back...but I´m thinking about it too much now...
What would the problems be with having two separate headers made for my car one for cylinders 1 and 2 and another for 3 and 4, and then running two pipes along the bottom of my car, meanwhile right after the resonaters directly behind the engine I put a single turbo on each pipe running back up into the intake with an intercooler placed somewhere feasible (at this point I´d have to have a hood with a scoop on it to make it work). I figure I can make this work but there´d be at a few problems: not enough back pressure to keep, and lots of low end drag. (Like EGTs already have)
I started thinking about this because, like Blade, I want a different, more custom Escort, but I don´t want rice it out. Anyone think this is even possible? My sister is dating a guy that builds custom turbos with all the trimmings.
if he wasn´t in Saudi Arabia right now, I´d ask him if he´s ever just sat and thought about things constantly like I do...
 

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Ok here is a very lame attemt to explain: the problem with having two seperate header "banks" on your engine will be the torque production. On NA cars the exhaust pulses need to be together at a certain point after leaving the combustion chamber. This helps with scavaging helping to pull the exhaust out of a different combustion chamber. If there are only two cylinders worth of exhaust pulses then you will not have the necessary scavaging effect to help the exhaust leave the combustion chamber. This will severly effect torque production though I believe that the high rpm horsepower might be aided but the loss of low rpm torque would be so detrimental that it would not make any sense to do so. Some aftermarket headers are 4-2-1 design this help midrange and top end power. Some are 4-1 design which are mainly for topend and ultimately higher horsepower at the expense of low end torque. The same goes for the intake, you know the little box before the airmeter on the BP GT´s? That thing helps the pulses work for you drawing in more air and actually makes more midrange torque than without. Very strange ideas, airflow is a strange thing. Now how this ties into using two turbos....well you would need tiny tiny TINY turbos in order for 2 cylinders to have enough gas velocity to turn them. On a 4 cyl car a twin turbo setup just isn´t feasible, there are enough small turbos on the market that can be all you would ever need on a 4 cyl car. I hope this was readable


´89 Mazda MX-6, 356 wtq
´93 EGT, 55 shot N2O

[ This message was edited by: MXTurbo on 13-12-2002 16:07 ]
 

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Discussion Starter · #3 ·
I figured all that. I don´t want to lose torque, i want to gain everything across the rpm range...The reason why I ask is because a coworker of mine who´s about 60 is an old hot rodder and he had that idea of 2 to 1 headers and separate pipes all the way back. i told him i didn´t think it would work, and he was like "just trust me...blah blah." I think i´m going to go with my original design.
 

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Also you need to have the turbo mounted within a short distance from the head. As the exhaust gas leaves the combustion chamber it expands and that is mostly what turns the turbine. Farther down stream it won´t have as much energy to spool the turbo.
 

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Discussion Starter · #5 ·
Well the way that I´d have that set up is that the Turbo would be underneath the intake ports behind the engine, with the intercooler on top of intake ports. So the turbo would be very very close to the intake and throttle body.
 

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Discussion Starter · #7 ·
Honestly, i never cared about the sound...I wanted to see what kind of power it´d give me, the only reason I was thinking about it simply because I was being forced to watch my coworker explain what they used to do to hotrod small block Chevy´s.
 

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back pressure....if ya did it, u´d have to use smaller exhaust pipes..without the correct backpressure, the car wont run right...not to mention without it, there wont be anything to spool up turbo´s....
 
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