Which Twin Turbo cars are Sequential Turbo?

[GsXtacY325]

So of the many twin turbocharged production vehicles, which are classified as a sequential twin turbo setup? I always assumed all or most ### production vehicles were sequential turbo from the factory, such as the Toyota Supra tt. However, today while browsing random ebay advertisements, i came across an ad that said that the RX7 is actually a non-sequential setup from the factory. Anyone know if this is a true statement? also, which of the following cars below are sequential and which are non sequential:

-Toyota Supra tt (i'm pretty sure this is sequential correct?)
-Nissan 300 zx tt
-Mitsu 3000 gt VR-4
-Mazda RX-7
-Nissan Skyline GTR

List any other twin turbo production vehicles if they were not above, but be sure to include if they are sequential or non-sequential factory setups.

 

[L2RTSiAWD]

300zx TT is not sequential, neither is a 3000GT VR-4

 

[L2RTSiAWD]

Lotus Espirit not sequential

 

[mysticfire6602]

ok, im not that big into the turbo terms, am i right when i assume sequential means that the first turbo spools up and helps to also spool up the second one while non sequential turbos opperate freely of one another?

 

[Quasimondo]

If it's a V configured engine, chances are that it's not a sequential twin turbo setup (Lotus Esprit, Nissan 300ZX, Mitsubish 3000GT VR-4, Dodge Stealth R/T)

The RX7 is a sequential twin turbo setup, whoever told you that has no idea and probably has never seen the rat's nest of vacum lines that is needed to make it all work properly (which is the #1 reason RX7 guys switch to a single turbo)

And yes, with sequential systems, the small turbo feeds the engine at low speeds, at mid speeds it feeds the engine and pre-spools the big turbo, and at top end, the big turbo takes over. It's different variations with different manufacturers on when the small turbo stops working and goes to the large turbo, but it's all the same, small turbo, then large turbo. Kinda useless now with the advantages that have been made in terms of turbocharger technology.

 

[Bostedquest]

In my knowlage and experiance...
the RX is the only sequential set up.
And yes they are a nightmare to deal with.

The supra has what is basically 2 manifolds. 3 cylinders feed 1 turbo.
The V motors are small dual, or big single.

 

[DannyD]

In my knowlage and experiance...
the RX is the only sequential set up.
And yes they are a nightmare to deal with.

The supra has what is basically 2 manifolds. 3 cylinders feed 1 turbo.
The V motors are small dual, or big single.

The MK IV Supras are set up as sequential twins, although many people have them running non-sequential for a smoother powerband.

 

[GsXtacY325]

So would it be correct to say that a non-sequential setup is built for more low-end/midrange boost levels (drag) whereas sequential are built with top end inmind? seeing as how the bigger turbo has plenty of power until redline Or does sequential/non-squential set up have nothing to do with bottom/top end? Correct me if i'm wrong please.

 

[Bostedquest]

So would it be correct to say that a non-sequential setup is built for more low-end/midrange boost levels (drag) whereas sequential are built with top end inmind? seeing as how the bigger turbo has plenty of power until redline Or does sequential/non-squential set up have nothing to do with bottom/top end? Correct me if i'm wrong please.

kinda.
But all turbo systems are built for a specific range.
On a single you can have low end, some middle. or middle and upper.
On sequential you have two differently sized turbos to compensate for both ends.