986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - 997 3.8L Carrera-S engine in a 986...?

jb92563 · 12-07-2015, 05:33 AM

I suspect that the 3.4 is the same size case as a 3.2 but with bigger piston bore/stroke so is a relatively easy upgrade

I think the 3.6+ is physically a bigger engine so space and fitment will become more of an issue.

The ECU is also a higher version so wiring and sensors are more of a pain.

Like the other others are saying a 3.4 may be the easiest upgrade, 3.6+ and there will be more things that need to be adapted.

Someone has to be first and should document all those adaptations that are required.

I'm sure Jake has already created a higher displacement engine based on the 3.2 size case, which would be an easier option for fitment.

12-07-2015, 05:33 AM	#5
jb92563 Registered User Join Date: Apr 2012 Location: Riverside, CA Posts: 1,665	I suspect that the 3.4 is the same size case as a 3.2 but with bigger piston bore/stroke so is a relatively easy upgrade I think the 3.6+ is physically a bigger engine so space and fitment will become more of an issue. The ECU is also a higher version so wiring and sensors are more of a pain. Like the other others are saying a 3.4 may be the easiest upgrade, 3.6+ and there will be more things that need to be adapted. Someone has to be first and should document all those adaptations that are required. I'm sure Jake has already created a higher displacement engine based on the 3.2 size case, which would be an easier option for fitment. __________________ "It broke because it wants to be Upgraded " 2012 Porsche Performance Driving School - SanDiego region 2001 Boxster S, Top Speed muffler, (Fred's) Mini Morimotto Projectors, Tarret UDP, Short Shifter, Touch Screen Dual Din Radio, 03 4 Bow glass Top (DD & Auto-X since May 17,2012) Last edited by jb92563; 12-07-2015 at 05:36 AM.