kbracing96

iTrader: (25)

Yes I did. Both setups worked well and I did full builds on them on Performancetrucks.net but Photobucket killed all the pics last month...

Dian

a sequential setup is really simple and foolproof. all you need to ad to a twin kit are two valves.

chuntington101

And a cross over between the turbos.
And a controller to control when the valves open
And a million miles testing to ensure smooth transition from 1 turbo to two.....

Then you can think about the nice to haves:

Speed senor on both turbos so you can actually see what they are doing and map engine rpm, throttle position, boost, maf flow, turbo rpm,.....
Electronic actuators for valves
Again more testing as as soon as you change anything it will impact the system.

There is a reason that NO OEMs use sequential turbos on any of there gas powered cars (even BMW who know how to do it on a diesel)! It's too bloody complicated and NOT needed with decent turbo selection and optimised engine config.

You if really want instant spool with a turbo setup (assuming you need it) then use a little N2O to light it off.

kingtal0n

iTrader: (1)

http://my.prostreetonline.com/2014/1...ential-turbos/

Spamfritter

iTrader: (1)

They used to do sequential turbos on the Ford Super Duty trucks. Later on they switched to variable geometry turbos. I know it works, but it seems like sizing your turbo and doing the installation right negates the need for it in a performance car. In the diesel trucks there was a need to provide both low end torque and power in the upper RPM ranges. Two things that weren't possible any other way until the move to variable geometry turbochargers.

Dian

every single has a crossover, you use a wastegate actuator and no million miles, it will just work like that. no need to overcomplicate it.

chuntington101

If it's so easy why are people doing it? Sound performance did it on a supra but it was a huge mess of piping and didnt go any faster than a normal single turbo.

Don't get me wrong I would love to see it working in practice. But I think there are just too many hurdles to jump if the amature guy. As said before even OEMs do t bother with it these days. Porsche went VGT even though there weren't turbos out there that could take the heat of gas engines. Even the hyper cars haven't bothered with VGT.

coltboostin

Its nothing like a compound set up. The only similarity is that there are 2 turbos.



I have set up compounds on 4 bangers, diesels, and petrol V8s. They work great when done right.