Question about 3.4 swap - 986 Forum - The Community for Porsche Boxster & Cayman Owners

fridsten · 08-25-2021, 12:36 PM

I have a base Boxster -99 with the 2.5 litre engine and manual gearbox and although it's great fun to drive, I can't help but thinking that it would be absolutely perfect with around 100 more hp. I have come across a 3.4 litre engine from a Tiptronic 996 (-98). Would it be possible to put that engine in my car as described in my 101 Projects book? Or is the tip box wiring incorporated in the engine electronics?

Quadcammer · 08-25-2021, 04:23 PM

reuse your 2.5 harness and reflash your stock ecu to a 996 tune of that era. Pretty straight forward swap. I have a 3.2 in mine and man its a lot more fun with more power

ike84 · 08-26-2021, 10:02 AM

Quad is correct. The engine doesn't care what tranny it's mated to, but the ecu certainly does.

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Racer Boy · 08-26-2021, 01:21 PM

Yes, another 100 + horsepower makes a big difference! I got that by getting a 3.4, but rather than swapping it into my '02 Boxster, I upgraded the whole car and got a 2010 Cayman S. At track days it is very noticeable, bends that were no problem flat-out in the Boxster are now places where you have to lift!

fridsten · 08-27-2021, 12:12 AM

Quote:

Originally Posted by Racer Boy

Yes, another 100 + horsepower makes a big difference! I got that by getting a 3.4, but rather than swapping it into my '02 Boxster, I upgraded the whole car and got a 2010 Cayman S. At track days it is very noticeable, bends that were no problem flat-out in the Boxster are now places where you have to lift!

That's an idea, but unfortunately that would be significantly more expensive. And my girlfriend just bought a 2008 Cayman S Design Edition 1, so I guess I can borrow hers...