03 V40 1,9 diesel. I want more power, what do i do?

[OleST]

Hello, i have a 2003 V40 diesel that needs a new flywheel and while im at it i'd like some more power, anyone know of a bigger turbo that bolts up to the stock manifold? (Will add a watercooled intercooler when i up the boost)

Also i would like to replace my dual masse flywheel with a solid flywheel, anyone know where i can buy one?

[bobthecabbage]

I have no experience with replacing flywheels but a solid flywheel is going to give you an engine like a tractor or old van according to the internet.

That and adding a bigger turbo is probably going to result in a short engine life!

I would suggest that for more power you should regularly service your engine, maybe use a 5W30 oil, clean your EGR or replace it, clean the MAF or replace it with an OEM part (or genuine). Service your brakes so they don't drag. Check your vacuum and boost control solenoid.

I don't know whether putting a bigger turbo on it and risking headgasket failure is worth the hassle (or even practical).

Maybe have a look around for a T4 instead?

[OleST]

I would get a t4 if i could but they are expensive... If i can get a solid flywheel i Will lighten it to prevent tractor like sluggish revs and such. I have read something on this forum about people building hybrid turbos and such but that thread didnt really go in depth AS to what was done.

[Zebster]

Remapping diesels can bring surprising gains before any hardware changes are necessary. Stick your reg in here and see what these guys offer? https://www.celtictuning.co.uk

The DMF doesn't just smooth out the firing pulses, it also acts as a 'torque reservoir' to avoid the crankshaft being strained/bowed/bent/cracked by high torque outputs that cannot be rapidly disappated by the transmission.

[OleST]

Have looked at chip tuning but i was thinking that i might as well look into hardware changes while im in there.

[Zebster]

I don't think you'll get much gain from hardware changes without a corresponding remap... You'll effectively be running your new hardware outside the stock map's operating envelope. It'll be far more cost-effective to spend your money on just the remap, unless you want to massively boost the power... in which case a different car would probably be a better option?

[OleST]

Didnt know that about dual mass flywheels.. would ofcourse get a tune along with any mechanical changes.

[AndyV7o]

The Renaults of the same age with the same Renault engine dont use a dmf, thus I cant see a solid flywheel being an issue as the engine was designed without one, I would also suspect that the Renault flywheel and clutch could be used (would need to check dimensions/spines etc, though I suspect it may also be the renault gearbox too, in which case, they should be interchangeable...) Does it definitely have a dmf?

Another thing, do you keep the egr clean? They clog like no-tomorrows on these engines and strangle the airflow...
Shell Helix ultra 5w40 works well in these engines, and helps keep the turbo clean.

Furthermore, in replacing turbo, you might be helping things, speak to a turbo specialist though see what they say, but the factory turbos are almost not fit for purpose, they work right at the limit of their tolerances which is why so many die if not looked after properly. Blanking off the egr often kills them too as it increases the burn temps and fries the turbo, so keep it, though its now illegal to remove it anyway.

[OleST]

I know for a fact its a dual mass, it has recently begun rattling like hell... Will clean my egr when i do the full service that im about to do.

My gen has a Volvo box (identifiable by the location of reverse, Renault boxes have reverse up Next to first while volvos have reverse down where sixth would be on a six speed)

[AndyV7o]

Yeah deffo a different box then as my scenic is as you say, pull collar and to the left of first.
Still, the renault clutch/flywheel might work, worth a look.
The thing where people break engines with solid kits is they use a dmf clutch plate which is also solid, solid flywheel clutch plates have springs to dampen/reduce these undue transfers which are quoted as breaking the crank, which is why cars without dmf dont keep breaking.