Twin Turbos

[v6Max]

I dropped a note here some time ago that I had seen a twin turbo conversion in progress for what is in effect the engine used in our cars.

Well I visited the guys doing the work yesterday and the engine was back from dyno where it had been mapped. Some figures that may be of interest are...

445 bhp and 488llb/ft

The engine actually runs milder cams than our engines do so more power would be available.

One of the interesting things about this conversion is that it's been done with mid-mounting as the final purpose so intercooling pipework etc has been factored around a mid mounted design.

A very basic idea of whats been done:

Custom manifold (obviously!)
Large injectors
Forged pistons
x-Beam rods to custom design
Modified sump, oil pickup and new oil drain from head
KMS ECU

I know the next question is going to be; "How much?" well it's not cheap! something around the 8.5k mark for basic work not including original engine or mapping (so in other words this is a parts and labour cost for the build itself).

 

[k1ano]

This conversions sounds like a monster. I love turbo's having owned turbo cars for over 16 years - they are sooo easy to tune

It is a lot of cash but is not too far away from what I would expect this type of conversion to cost given the engine rework.

I think a NOS solution would be more practicle on the V6 - as I think some have done.

My other preferred solution would be a vortex type supercharger which would probably fit more easily than twin or single turbos - due to space and heat limitations. This would compliment the existing V6 torque delivery with a healthy increas in torque and power.

Of course intercooling on any forced induction solution is the challenge.

I believe a V6 in this country runs a supercharger (I have seen a great video of it on the net) - is the owner on this site ? I am not sure what type of supercharger i.e. roots type or centrifugal type.

My only concern about any engine conversion on the V6 is the very high OEM compression ratio (11.4 to 1) which would lead me to think that any form of forced induction would require compression ratio changes at the expense of the excellent low end response - which kind of puts turbo(s) out of the equation for me.

Compression ratio changes would require piston replacement/machining or head machining. I don't like the thicker h/g solution - which is done with some conversions.

Martin

 

[® Andy]

I believe a V6 in this country runs a supercharger (I have seen a great video of it on the net) - is the owner on this site ?

Yep ... the owner is MikeT .

 

[k1ano]

Ah, I was wondering

The video I saw of the V6 buzzing along a road with a roundabout every now and again was impressive - especially the overtaking segments. The pick-up and noise is very impressive ...

Will have to find out from Mike T what conversion it is

Martin

 

[Jamesv6]

Everything hidden under the OE engine covers I hope?

 

[Peter255]

Everything hidden under the OE engine covers I hope?

With twin turbo's it'd be a bit cramped and a bit hot under the covers! :shock:

Not even "hump back" covers as some have had custom made. :wink:

Peter

 

[Jamesv6]

Bang goes my idea of a sleeper then.

I'll stick to my kitted up 1.2 I guess.

 

[v6Max]

No - definitely wouldn't fit under the stock covers I'm afraid. I can't think of a way that you would be able to cram that much plumbing in without going down the cover off and bulkhead route TBH.

 

[Mike T]

you can't.

Whay boost they running max - that must be 1.25 bar from about 2500 rpm with some serious electronics?

Any pics

And my chargers a procharger c2 - runs just under a bar for 375 - 400bhp depending on air temps

 

[k1ano]

Mike,

Procharger C2 - nice

Do you run an intercooler, chargecooler or no cooler ?

By a process of deduction ...

I am guessing if you get 120 hp from 1 bar, that you don't have an intercooler.

I expect plumbing a chargecooler is a bit hard with the V6 too come to think about it (they are what I am used to). And an intercooler would need air-flow and intakes which are already in use - gosh I could imagine the pressure drop if you had a front mount too.

Martin

 

[Mike T]

2 chargecoolers installed - 160 bhp extra at 1 bar with larger torque gains - its 240 bhpish standard with low comp (8.3) pistons

 

[v6Max]

Ok - some more info...

Boost figure is 17p.s.i. or about 1.1 bar. Boost starts @ about 2,400 rpm.

I'll try and get some pictures so that you can all see what it looks like.

 

[Mike T]

17psi is 1.22 bar!! and give me a break, 100rpm out!!!!

See the calcs work - be interesting to see what it makes in the car with all the temperature issues resolved!!

 

[Anonymous]

I'd love some forced induction on mine.

Was only saying to the mrs yesterday, why can't it be twin turbo. :scratch:

I love the car (apart form the dash/steering wheel :shock: ) it's very different to the norm but why they had to be so poor in the power dept is beyond me.

I can't help thinking how much nicer it'd be with another 100 bhp

 

[Mike T]

it is!

 

[Anonymous]

Love to have a go in yours!

Do you have any build info/pics on your car? Would be interesting to see.

 

[Mike T]

its in the coty section on the forum I believe

Mike

 

[Mike T]

thats the cliosport forum!!

 

[Anonymous]

No idea what the 'coty' section is Mike..

Searched your username and went through a few pages finding most stuff removed etc.

Can't believe the price you sold that supercharger setup for though! Don't think I'd have been able to resist that!

 

[Anonymous]

How much was it sold for?

What is required to supercharge the v6? new injectors, pistons, rods etc?

How much or should I say little can it be done for?