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Engine/DME differences for Cayman S/Boxster S?

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What is the difference in ENGINE/DMEs for a Cayman 2007 3.4S and a 2007 Boxster?

What would be needed to put this in an earlier Boxter?

02-05 987?




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They are the same physical units ( DME 7.8.x)- but the programming is likely different for different size engines.

Hmm... maybe Todd knows for sure but he newer DME's are expecting input from other devices that a 9x6 series car does not have.

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i've been digging around haven't found what I need yet.

reason I am asking is I can get my hands on a 3.4S Cayman engine.. and wanted to know what the possibilities are.....

I thought the 7.8s allowed a more advanced vario cam .. so that a 2007 engine would not be stimated properly with am earlier

dme.... maybe that is only 997 engines??? not 987s...

that being said ... I wonder if the 2007 would run well enough if using and earlier dme....

thx for the help

i'll keep surfing....


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The 3.4 engine is variocam plus whereas the 3.2 is variocam , so using an earlier DME from a non variocam plus car doesnt sound like it will work with the 3.4. That said the 997 and 987 use the same rear DME.

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I'm interested since I have a 2009 Boxster S and would be interested in knowing if the only difference between the Cayman S and Boxster S is either marketing and/or software or actually something physical. Can I just unlock the extra 10 HP some place?

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If you look at the parts catalogue , the differences appear only to be on the rear silencers , though I have heard stories of people having the RS60 ECU setting put in a 3.4 to give 303 versus the standard 295 hp. The boxster and cayman "sport" models with aerokits etc had the same bhp figures. On the newer dfi cars, I,m not sure where the parts are different or if its done in the ECU alone.

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Little late to the party.. but... here is a 2001 Boxster I installed a 3.4 CaymanS engine into. We tuned it on Friday to 291lb ft of tq and 347hp and did a shake down run at El Toro this past weekend where we eeked out 2nd car overall for TTOD (not bad for a shake down ..LOL) 5 speed 2.7 tranny with NO LSD (yet) and all new JRZ double adjustable remote canister shocks/control arms/blah blah..

I now know why Todd keeps all the info about these conversions *quiet* It can be VERY time consuming and difficult depending on which chassis and which engine you start with

My professional suggestion? Start with an 02 and up car. Start with an 00-or 01 car and you will quickly figure out why I suggest the 02 and up chassis' !!! :)

Oh.. and don't believe 98% of what you read online. Rarely do I run across a conversion car that actually runs correctly and does what it should (and I travel nationwide for pro racing and PCA club racing events)


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