Interested to hear peoples thoughts on this .

I have heard a few people talk about the possibility of using twin turbos on a coop, and was wondering if this was a viable option.

I myself have no intention of doing it, but it seems a good idea to me.

Discuss

I know that Pug.

In theory it will be laggy as hell mounting the turbo there - but works very well on that car....a fair few cars / trucks in the US have that configuration.

Are you thinking one turbo in the engine bay, and one at the back?

On of the major stumbling blocks is with the 5 cyl engine how to you have the turbo's split between the cylinders? Would normally be two manifolds with a turbo attached to each.

Is there space for two turbos in the engine bay?

Controlling them would also be complicated - aftermarket ecu etc.

Yeah, i was thinking one at the back and the normal set-up in the front.

I was thinking of a kind of 'T' piece just before the throttle body for both turbos to get both their air flows into the engine?

Its not something i would want to do, but i'm sure somebody else could be interested?

More pipework means more LAG

Simple as that.

Also putting a turbo on a car like that is stupid and pointless,unless you plan to live where the roads are perfectly flat/smooth and you will never see a speed bump in your life.

It would be so complicated to set up with dual AFM's etc that the gains you'd actually get from it just wouldn't be worth it.

I read about the Pug in PPC magazine a while back, a good conversion by no where near as nice as the turbo technics conversion for the Pug.

As suba said, it's a known solution for many cars in the US. I've seen many Chevys and Fords with this setup.

I've never thought about it for the Coupe.. and I think it will be lagy for smaller engines.

It's a pretty crap solution even with just the one turbo, though it does get around space limitations in the engine bay. If you were feeding it from the output of an existing turbo it would work even more poorly, whilst at the same time making the original turbo work poorly due to all the extra back pressure it would see.

it could be made to work well but you'd really need two exhaust systems - one when on the first turbo then another one from the wastegate of the first turbo to the second turbo.
here's a novel way of getting round the space limitations on a Marea Turbo

It wont be as efficient as a big single and if you want it sequential then good luck, because vacuum systems are hellish.

I thought this was a 1st april feature..

this topic reminds me this 600hp lancia engine http://s55.radikal.ru/i148/0904/85/b21975fc1fc4.jpg
shame it won`t fit coop`s engine compartment

this kind of turbo system was done because of some laws, where you can put anything behind the front suspensions, or something like that..

useless where I live..

The systems in the US are designed to add a turbo to a non turbo car. They supply a complete kit, ready to bolt up. That in itself is the major draw card and even with low boost, they make very decent gains because they are intended for large capacity engines. They compromise a lot but its an easy install with no changes under the bonnet. Im sure there is a huge market out there and good on them

However, they are in no way a good idea for a factory turbo car, or any "performance" car. If you really wanted a twin turbo you should fit another turbo up the front. I don't see the point putting it at the back. If you did fit it at the back the turbo's would be compounded, it makes no sense at all to run them parallel

My main issue with the idea is that for an existing turbo car, the config becomes big LP turbo, small HP turbo, compounded compressors, compounded turbines but with a bypass for the HP turbine through to the LP or LP 2nd scroll.

The mechanics of it are all well and good and no-one will tell you an extra 5psi at the top end isn't welcome.

My problem is this.... The LP turbo will be physically large and has to connect to a filtered air inlet. Where do you put the air filter? All well and good to stuff it under the rear bumper on a track car (as the Pug in question) but on a road car? What about rain, stones and puddles? Do you end up with a stack, like an American truck, but sucking rather than puffing?

J.

Theres a video to this car on youtube too.
I've seen it run and tbh it dont seem laggy.
Its all down to pipework dimensions and setting the volume up for pressures as you'll all know.

Its possible to set it up well, but its a knife edge between perfect and waste of time.

But dont think it would compliment the coupe very well.

A friend of mine is doing this with his KA. The KA's running a 2.5ltr Vectra V6 lump though lol