Twin Turbos PLUS !!!!
He is only running 14 pound of BOOST:banghead: Turn the boost up and forget about the nos.
he is running a 14-71 blower not a 4-71 or a 6-71 but a 14-71 and only running 14 pound of boost.
Mad Dart, i thing you are right, the turbos are not creating any boost to the equation!
The only thread that i have read about combining a turbo with a super charge he called it TWINCHARGER
In that article he said that the turbo+ charger was not the pressure it made. it was X or somthing like that......Hmmmm
I still don't full under stand this stuff and the pressure ratios and all! so i will just quote what i read on that thread.
http://www.eng-tips.com/viewthread.cfm?qid=174690
He is only running 14 pound of BOOST:banghead: Turn the boost up and forget about the nos.
he is running a 14-71 blower not a 4-71 or a 6-71 but a 14-71 and only running 14 pound of boost.
Mad Dart, i thing you are right, the turbos are not creating any boost to the equation!
The only thread that i have read about combining a turbo with a super charge he called it TWINCHARGER
In that article he said that the turbo+ charger was not the pressure it made. it was X or somthing like that......Hmmmm
I still don't full under stand this stuff and the pressure ratios and all! so i will just quote what i read on that thread.
If your interested and want to read the hole thread it is hereSo if your turbo has a pressure ratio of 2.0 (14.7 psi boost), and your supercharger has a pressure ratio of 1.4 (5.9 psi boost) you get a total combined pressure ratio of 2.8 which is 26.5 psi, not 14.7 + 5.9 = 20.6 psi.
So expect to see 14.7 out of the turbo, and 26.5psi out of the supercharger. The supercharger will work A LOT HARDER with much denser air being forced into into it.
The best way to handle this is to just run your wastegate sensing line off the total combined boost, and select a wastegate spring for whatever total boost you finally decide to run. Boost will quickly rise to that pressure and stay there over a very wide Rpm range.
If your exhaust housing originally produced full boost at 4,000 Rpm with just the turbo, expect full boost at more like 2,000 Rpm with twincharging. I am not kidding. You will definitely require a larger a/r exhaust housing, but try it first and see.
The whole thing will be far more responsive and have a much lower turbo boost threshold than you are probably expecting. But the top end powerwill still be there.
http://www.eng-tips.com/viewthread.cfm?qid=174690
