There seems to be many misunderstandings on this forum about turbos.
Lag isnt at what point the turbo kicks in, this is called boost threshhold. Lag is the time it takes for the intake pipes to be filled up with air from when the throttle is press and the turbo is in range for boost.
Many bigger turbos are capable of very little lag.
I have also read alot of times on here about people wanting to use the scoop to cool the turbo... A turbo shouldnt be cooled because this will actually increase lag and boost threshhold. this is becuase the hotter the turbo the faster the exhaust gasses run, therefore quicker the spool up, you can buy kits to actually keep the heat in the turbo. You only want to cool the air coming out of the turbo, hence use of intercoolers.
Also there are many other turbos that use the twin scroll technology, Evos use the same technology. You are not going to loose driveablity unless you get a turbo too big for the engine, for example a T4 size turbo is very likely to be way to big, there are many turbos that are larger and will give good driveability and performance, a GT28R is will probably hit full boost between 2-3000rpm and give little lag, due to a roller bearing set up, but as said before a custom manifold and downpipe will be needed.
Also just because its FWD and will have alot of power doesnt mean it will be hard to drive. there are many things that affect that, diff, tyres, suspension set up. I have a rover coupe turbo with 248bhp (dyno proven) and that put the power down fantastically with barly any wheel spin (uses a torsen diff) and i know of people running more and there still perfectly drivable.
If you have a bigger turbo as long as you actually drive the car properly there will be no loss in drivability, just make sure the turbos in range. |