Its well known that the stock K24 turbo on the S2 doesn't have enough puff to make 300bhp, so the safe limit on chipped engines is in the region of 270-280bhp with 410-430Nm of torque. Maybe a little more power on decatted cars with a sports exhaust will get towards 290bhp and *maybe* an RS2 intercooler along with a decent coldair intake and cone filter will get tantilisingly close to 300bhp.
The RS2 turbo is a well known tried and tested conversion - capable of 360-380bhp with 500-600Nm readily available depending on mapping choices. But this needs the RS2 manifold, intercooler, green injectors and RS2/7A camshafts. It could cost anywhere from £750-1500 which I ain't got quite frankly.
I've got to thinking about an alternative hybrid turbo that has the capacity to break the 300bhp barrier without all the RS2 parts. I know the stock S2 manifold is good for ~330bhp. I also want a small enough turbo that ensures minimum lag and great driveability for daily duties. The RS2 setup inherently has more lag than the K24 turbo.
My goal is 450Nm of torque (within limits of the 6-cog box) and a smidge over 300bhp with the standard airbox and intercooler if possible. I absolutely don't want to get into RS2 manifolds, green injectors and funky camshafts on this.
My idea is to create a hybrid turbo with a K24 hot side and a K26 cold side. This assumes they can be bolted onto the same centre section with no drama. It also assumes the K24 hot side can provide enough energy to drive the K26 compressor into territory where it can easily push more air than the standard turbo - at increased efficiencies (resulting in lower air temps) ... that combines to produce more torque and more power.
Any views from the other turbo heads out there ?
Maybe there are other variants of the K24 which have a larger cold side than
ours (from a Volvo 850 T5 maybe) ?
The cost should be around £250-£350 for a turbo specialist to do the work. More like it - plus time into developing suitably tweaked chips
I'll have to dig out some K26 compressor maps for an investigation. Watch this space...
The RS2 turbo is a well known tried and tested conversion - capable of 360-380bhp with 500-600Nm readily available depending on mapping choices. But this needs the RS2 manifold, intercooler, green injectors and RS2/7A camshafts. It could cost anywhere from £750-1500 which I ain't got quite frankly.
I've got to thinking about an alternative hybrid turbo that has the capacity to break the 300bhp barrier without all the RS2 parts. I know the stock S2 manifold is good for ~330bhp. I also want a small enough turbo that ensures minimum lag and great driveability for daily duties. The RS2 setup inherently has more lag than the K24 turbo.
My goal is 450Nm of torque (within limits of the 6-cog box) and a smidge over 300bhp with the standard airbox and intercooler if possible. I absolutely don't want to get into RS2 manifolds, green injectors and funky camshafts on this.
My idea is to create a hybrid turbo with a K24 hot side and a K26 cold side. This assumes they can be bolted onto the same centre section with no drama. It also assumes the K24 hot side can provide enough energy to drive the K26 compressor into territory where it can easily push more air than the standard turbo - at increased efficiencies (resulting in lower air temps) ... that combines to produce more torque and more power.
Any views from the other turbo heads out there ?
Maybe there are other variants of the K24 which have a larger cold side than
ours (from a Volvo 850 T5 maybe) ?
The cost should be around £250-£350 for a turbo specialist to do the work. More like it - plus time into developing suitably tweaked chips
I'll have to dig out some K26 compressor maps for an investigation. Watch this space...
More homework required.
Comment