how about this then; i know it is getting complicated, but so are factory sequentials. the small turbo would be allowed to free spin while the larger turbo makes boost without being forced in the opposite direction. the exhaust could be vented after the big turbo at whatever psi i want the little turbo to make (i guess the vauum line should connect to the pipe after the little turbo... oops). and the charge air could bypass the little turbo via a wastegate used on the charge pipes. the first wastegate would actually control my max boost setting from the large turbo.

and the intercooler will be circulating with ice water so it will kick as much *** as an intercooler possibly can.

thanks for the response so far everyone,
-tony

 

IMO the best way to do it... but i think its a little over the top for such a small motor. a large turbo is better off spooled due to high rpms/compression proper ignition timeing and AFR's and the heads ability to flow.

 

I would go with the first setup. use a one way valve on both charge pipe. and an electronic exhaust cut out in between both exhaust side so exhaust from the bigger turbo can go directly into the DP once it start to spool.

 

just run nitrous+t3/t4. screw all of that nonsince

 

Newbies.
Study how sequential turbocharging works. It requires lots of control valves and electronic control too.

 

Yup.

Actually, you can stack turbos like the diesel boys do, but gas engines usually don't like the charge temps or mutant boost figures.

None of the diagrams shown are how the diesel guys stack turbos, tho...

 

I think that is a great idea but out of ease of installation, wouldn't it be better to run one of those variable exhaust turbos you find on the newer audi's? It would give you the spool up time of an IHI and then once the pressure is high enough the exhaust fins adjust to resemble more like a bigger turbo. Just like the one found here:

https://www.homemadeturbo.com/forum/...?topic=57479.0

I would really like to see someone have one of these installed and running. Don't get me wrong, I think you have a great idea on your hands and it is something very different but simply out of ease of installation this can be a great alternative.

EJ

 

i think banks turbo system has a similar setup for diesel. a sequential would be nice if it had some type of gating system to regulate flow from one turbo to the other depending on engine speed

 

Correct. They also use two different sized turbos as well. Here's my old Volvo project that got started but sadly never made it into the car:

 

Yeah the diesel systems are different, they're used to run high boost figures not normally possible with a single centrifugal compressor. (100psi ish)