Single turbo - whats the point?

[Davegtt]

Hi Guys, I was wondering if you could tell me the main reasons people go for a single turbo converson?  I currently have a single turbo\'d car (not a rex) and can see the benefits of a sequential boost application for miminal lag, does a single turbo rex have alot of lag?

Does the bigger single turbo deliver a more efficient boost charge making it more powerfull at lower revs but also pulling well into the red line?

any info appreciated

regards

Dave

[Fish]

Dave, the joys of twins vs. single debate.... This will go on for ever.

The big advantage of twin are the quick spool up.

The big advantage of the single is you loose the rats nest of vacuum hoses.

Having a (big) single does need to be laggy! With the modern Garrett\'s about, spool up is a lot quicker than those of old. Plus you learn to drive around the areas that you would get lag.

The lsat bit is something people cant understand until you have driven a big single for more than a week. They soon learn the ways.

Dan

[Davegtt]

Cheers mate, so basically can you get more power out of a single turbo and rather than 2?  could you not replace the seconadary turbo with a bigger one?

I know exactly what you mean about driving round the lag, I currently get about 2 seconds lag from low spool up on my motor

Dave

[Fish]

I know that out in the US they swap the stock twins for twin T28\'s.

Dan

[Glenn Butcher]

The standard twin turbo\'s will only flow up to a certain amount of exhaust gas etc. i.e. the size of it governs the power output.

I think some people have managed to get 400hp from stock twins, but it is really pushing them hard.

A medium sized single turbo will help produce 400hp quite comfortably, and some single turbo\'s on rotaries can help produce as much as 1200hp.

You can also run two single turbo\'s in parallel (one for each rotor).

It does simplify things somewhat in the engine bay!

[Davegtt]

So its to get  more power - perhaps suited to people who are going for big power and also cleans up the engine bay.

Cheers for the replys chaps

Dave

[20B_boy]

Originally posted by Davegtt
So its to get  more power - perhaps suited to people who are going for big power and also cleans up the engine bay.

Yes, but it is more \'reliable\' too as the twin turbo control system is a pretty complex affair - and a nightmare to trouble shoot...

[skybusr34]

how well does the twin turbo`s work . when they are running together constantly.
  im just thinking about the day when the sequntial set up starts to fail.   im not rich enough for a single.

[J4P RX]

If your sequential system were to fail, then you may find going single is cheaper or not so different.

You only need to buy one turbo as opposed to two, future maintenance is much less etc etc.

If my turbos failed, that would be the ideal time to go to single as youd be forced to do something.

Lee

[Fishy]

I think Mark is on about going non-sequential. This is another cure for removing most of the dreaded rats nest.

Dan

[skybusr34]

yeah im talking non sequential set up. to get rid of all them hoses

[20B_boy]

Some people like it, some people dont. I dont think there\'s any real consensus to be honest, I remember a long thread on the NZ list about it.

But if yer having control problems then its a decent \'fix\' I guess...