987 capacity increase. .

[boringbeige]

I am thinking of having my 3.4 Boxster S taken to 3.7 or even 3.9. Has anyone done this? Who did you use? What are the results like?

[mrdemon]

just buy a 405bhp 3.8 GTS engine and sell the one you have.

Not sure a Boxster needs more than 350BHp any way.

[boringbeige]

I agree in that they don't need a great deal more than 350 horse. I've got cargraphic plenum, throttle bodies, manifolds, full exhaust and ecu to match, so might have something approaching that anyway. What I'd like is a dollop more torque at lower Rev's, and a capacity increase should give me that. A 3.8 gts engine might ruin the balance of the car. But maybe a 997.2 3.6 engine would be good. Where do you buy complete engines and would that be a more cost effective route than boring/stroking mine? I emailed Autofarm today asking for prices.

[Magic919]

Have seen complete 997 engines on eBay.

[Gabby123]

Do they fit though? Engine, gearbox round the wrong way compared to 911? Is handling compromised?

[douglasgdmw]

Lot more expensive but speak to RUF on how to perform a desirable engine change in a Boxster/Cayman.

George