turbo setup for track car

[M3YUK]

I building a track E82 135i
Was wondering what the best way to go for turbo setup single or bigger twins
I'm in the uk and being a rhd there is not a bolt on single conversion but have a company will to make a manifold and downpipe
And there a few bigger twins on the market that fit
Power wise a 600whp would be nice

[M3YUK]

sorry from place

[The Wind Breezes]

You want a single turbo, preferably twin scroll and ball bearing. It will be much easier and drivability will be fine on track since you'll always have the revs to spool quickly. Multiple turbos could work too but there's not really an advantage and it will be more complicated.

Since you don't know what you're doing, take the car to a reputable shop that does this sort of thing, pay a shitload of money (well over $10K US) and get a badass, properly setup car. A good shop will hear your use criteria and power goals, and figure everything else out for you. If you're trying to do this on the cheap you either need to abandon that dream, or get ready for years of learning both by book and trial and error AND you'll probably spend as much money as you would have in the first place just taking it to a shop. Keep in mind the most important thing here will be the tune, so make SURE whoever is doing that knows their shit (mostly a gamble tbh unless you pick a REALLY reputable shop)

[ilikebmxbikes]

I would focus on chassis enhancement and cooling over power.

[Amnizu]

Have you been through driver's training?

After that is done focus on suspension, brakes, power delivery and safety first. Power is worthless if you cannot control it.

[AB M2C]

I would go twins. You won't have as much on the higher end, but they'll spool quicker and be more drivable overall than one huge turbo; also your power goals are definitely achievable on a twin setup, if you were shooting for 800+ horsepower then you'd need a single turbo setup. If tuned right twins should come on less punchy, which should be a lot more predictable on corner exit. I don't think they'll be more complicated on an n54, considering the mass amount of parts you need to convert from a twin to a single setup anyway.

If I was only drag racing I'd go single turbo, but it sounds to me for your needs you'd be better off going with a twin setup.

[titium]

Originally Posted by ilikebmxbikes

I would focus on chassis enhancement and cooling over power.

+1

brakes will be your biggest issue. even with the standard turbos.

get your skills honed in get the suspension setup right then focus on power.