Parallel Twin Turbo setup?

[foamypirate]

I was wondering what your peoples opinions were? I was thinking about a parallel twin turbo setup. I.E. A turbo exhaust manfiold with a 14b, charge piping run to a turbo flange, connected to 16g, then run through an intercooler, and into the throttle body? Wouldn't this allow you to have virtually no turbo lag, but still make a beefy amount of HP and TQ? I am not really sure on it, but it was just a random idea I had. What are your thoughts?

P.S. A better example might be a T25 feeding a T3/T4 turbo.

ARG. I just realized the topic should be SERIES twin turbo...

[bruno8747]

Turbo's cant feed each other. If you want to eliminate turbo lag, get ball bearing turbo's. Better manifold, better exhaust system.

[foamypirate]

Why couldn't they feed each other? It'd essentially be a colder exhaust stream (not literally) coming from the second turbo.

[bresk8r87]

youll increase lag and backpressure immensly with 2 turbos on the same exhaust stream... only real way to cool exhaust is a better flowing manifold, and possibly a cooler intake airflow (methanol), and if you want to reduce lag, get a ball bearing or a variable geometry turbo (like the new beamers)

[foamypirate]

Only 1 turbo would be on the exhaust stream. The boost from that turbo would have the same effect as an exhaust stream on the other turbo. Downpipe off the first turbo, air charge pushing second turbo. I need someone that can do really awesome math, lol.

[NAiL05]

Turbos can feed each other. Look at the Supra, Small turbo goin into a slightly bigger one. As mentioned it is possible. I wouldnt say its impossible. Someone on homemade turbo did it on a b16A if I remember.

[HondaB18]

Your title kinna confuses me, do you mean like the twin turbos that goes into the FD RX-7s (smaller turbo and bigger turbo)?

[texasvtak]

Technically this is called biturbo. And its entirely possible because lots of stock cars use the setup. Thing is..do you really want to tune that?

[maroonaccord2.2]

Turbos can feed each other. Look at the Supra, Small turbo goin into a slightly bigger one. As mentioned it is possible. I wouldnt say its impossible. Someone on homemade turbo did it on a b16A if I remember.

That's false, the turbos in the Supras are NOT hooked together. The reason they run 2 different turbos is to increase low end power with low-rpm spool, and the larger or the two turbos optimizes the top end power. The goal is to optimize boost over the entire RPM range.

Hence the reference "sequential turbos."

[d112crzy]

if all you're going for is originallity in a cb7 its ok, but other wise, its pointless. you're better off getting a turbo to suit your goals.

[foamypirate]

I'm not quite sure how the turbo's are setup on the RX-7 (I should ask my uncle, he has one), but I would assume it is somehing similar. I don't think it would be super difficult to tune, you just have boost throughout the rpm range instead of coming in at a certain point, say 5000rpm or so. Though, this presents the whole predicament similar to coming "on cam" with a SOHC, or having a smoother powerband with DOHC. Which is more fun to drive?

[92ex]

fit that in the cb7 engine bay

[d112crzy]

that depends on how its built. im sure ciscos red project is more fun to drive than my car.

[HondaB18]

Technically this is called biturbo. And its entirely possible because lots of stock cars use the setup. Thing is..do you really want to tune that?

I was going to say biturbo instead of twin turbo but most people refer it to twin turbo so eh. And the Audi S4 (the turbo'ed V6) uses dual K04 turbos and yet is called biturbo. Confusing isn't it.

[NAiL05]

That's false, the turbos in the Supras are NOT hooked together. The reason they run 2 different turbos is to increase low end power with low-rpm spool, and the larger or the two turbos optimizes the top end power. The goal is to optimize boost over the entire RPM range.

Hence the reference "sequential turbos."

Sweet I just got pizzowned.