[turbobluestreak]

What real benifets would be gained by setting up twin turbo on a 280zx? I know it can be done. I would have intercooler "Conquest" ,hard piping run, blow off valve, 240sx trottle body, and a 300zxt ecu with 300 eccs.





tbs

 

[Nicks 83zxt]

ongoing debate...

Experts and specialists have been debating this issue a long time, there doesn't seem to be a clear advantage to having a twin turbo versus a single in performance. It is easier to plumb a v engine with twin turbos than with a single turbo. I have heard of people with twin turbo setups with two different sized turbos in series the smaller one feeding the bigger one. I am not a specialist or an expert though.

Nick

 

[Brad-Man]

If done correctly, you should have faster boost response. Thisis great for road racing/autocross.

For drag racing you would probably be better off with a single large turbo.

Also, the Conquest intercooler is better than nothing, b ut will be WAY too small for the power capabilities of two turbos or one large. Rather than use two turbos and the associated exhaust fabrication, get a larger intercooler and use the stock manifold (extrude-honed) and get an SDS system instead of the 300zxt.

Total less bucks and easier programmability and power.

I know a lot of people who have gone this route and have plenty of response.

 

[Tony D]

Engineering Exercise...

For the use intended (street) a single is more practical.
Electromotive used twin-turbo on the ZX for IMSA competition the first year, but went with a single unit for their all-conquering run in the 82-83 season.
Same for the Porsche, they thought the two turbos would respond better.
There are advantages, as the masses are something you can figure, smaller diameter wheels, etc etc etc.
There are a lot of other items, though, like complexity, more parts, slightly more difficult control.
For applications below a HP number, a single is simply more practical. If you are upwards of 400, then you can stat making arguments justifying Twins, as there are commercially available units that can be had fairly inexpensively, that will actually lower the cost of the setup, compared to the cost of a several-thousand dollar turbo unit.
Spool up is not really a factor, in a properly designed single setup, BTW.
Progressive setups are something altogether different!

 

[1970_240z]

Re: Engineering Exercise...

i'm sure twin turbos have thier advantages, but if you look at the supra guys, they are pulling off their stock twins to replace them with one single turbo. i rode in one of those the other day with a huge single T78 tubo and it scared the absolute sh*t out of me!! (my buddy has a supra with stock twins and it's fast, but nowhere close.)