How to legacy twin turbo to parallel?

[whatchain]

not sure where to start with this but i have a few questions would like to know...

is it to do with the ecu or the pipe setups. also has anyone got this done before? what are the goods and bads from sequential to parallel set up. also how much will it cost to get this done roughly? worth it?

[clintondane]

I've read several threads on here about people doing it, can't remember the details but from what i remember the results are mixed and include massive amounts of turbo lag. Not many manufacturers do parallel turbo setups, BMW are the only ones I can think of offhand. Most people will probably suggest going the single turbo route instead.

[Marky]

You can do it for free in about 30 mins, just locking it in the situation it has about 4000rpm now.

I've done it, resulted in a pretty laggy setup - not much happening at all under 3k, but it ramps up to full boost pretty quick after about 3500 "ish".

Good fun if you're in the habit of fanging it off the lights or just thrashing it in general, feels very similar to say a TD06 on a 2L motor.

You lose the rumble completely, and the low end sucks. On the other hand once you have some RPM up its much more responsive, drop back to pass and you don't have to wait for it to think "should I use one or two..." then start switching things, it just goes like a normal car.

The ECU is supposed to pack a sad about it - you can fool it to a degree that everything is going ok, but it's not ideal. I've heard of people using a WRX ECU to avoid this - makes sense. I never ran into it but only went parallel for a fortnight, wife hated the sound of it and lack of down low boost.

Don't pay anyone to do it, and as for whether it's worth it or not is personal opinion I guess - it costs nothing to try it, I'll write up how to do it later on (forgotten half of the pipe numbers so will go look at car). Swapping back can be done on the side of the road.

[rex-leggy]

dont use the standard ecu..... should i repeat that don't use the standard ecu