3.6 In Non E-gas Boxster

[Kanin]

Hi Guy's,

Firstly, we have just completed a 3.6 996 conversion into a 1997 Boxster, its not that difficult at all.

Yes, the 996 is e-gas and the boxster is cable operated but that easily taken care of by using a 3.4 non e-gas throttle body.

But if ur boxster is egas, then you should'nt have any probs at all.

As for the transmision, u do't need a 996 unit, you can use the 986 gearbox, it will mate-up perfectly but you will have to use the 986 flywheel and clutch.

The are a few other mods that you need to do but no real biggies, all the parts needed are transfered over from the 986 motor and so on.

You do use the orignal boxster harness for this conversion with miner modification,

The real obstacle is getting the variocam+ to work, we used an external management moudule to operate the timing solenoids, u can however have a chat with a chap called "Tholyoak" from this forum, he has also completed a 3.6 conversion into his boxster but has developed a way to integrate the original 3.6 996 DME into the boxster. This guy really know's his stuff and has really hepled us through our project...top guy.

the other thing, since your car is egas, I take it its a 2.7 or a 3.2.

Our car was a 2.5, so in terms of the DME, we used a 996 3.4 unit, its the same part number as a post 98 986 2.5 dme except it is obviously flashed with the 3.4 file, we did this so we could operate the actuator for the resonance valve: 2.5 boxster don't have one.

By the way, we originally swapped our 2.5 motor with an egas 3.2 before the 3.6 swap, so that is why we replaced our DME with a 3.4, just so we could activate the resonave valve and have better fueling and timing maps from the 3.4 file then the standard 2.5 DME. If we would have known that we were gonna do i 3.6 swap at somepoint, we would have just purchased a piggyback system, we could have also activated the resonace valve and sorted out the fueling and timing.

Yours on the other hand, being a 2.7 or 3.2, will have the resonace valve therefore the DME is already programmed to activate this valve. So if I was in your shoes I would use a aftermarket piggyback system to sort out the timing and fueling maps for the variocam+, its easily done if u know what your doing.........is'nt that right Todd? :P

The conversion is not too difficult to do at all but poduces unbelievable power, well worth the agro.

Edited August 17, 2007 by Kanin

[catmanluge]

Ahh, it's amazing how many people are misinformed on this on other forums... It does make sense that the engine would rotate the same - Porsche would never bother to develop a reverse rotational engine when they could just change the differential...

Thanks!

Shash

Years ago racing Folumula "V" the engine was in front of the gear box similar to a Boxster setup. The VW ring gear was just flopped over so we could have 4 speeds forward. Same as a 996 VS a 986 however I don't think you can flip the Ring Gear on either.

[wrljet]

Years ago racing Folumula "V" the engine was in front of the gear box similar to a Boxster setup. The VW ring gear was just flopped over so we could have 4 speeds forward. Same as a 996 VS a 986 however I don't think you can flip the Ring Gear on either.

Sure, that's how 914s work. 901 gearbox with the ring gear flipped.

[tholyoak]

You guys need to use the search feature. All these questions have been asked, and answered again and again.

In short, you can put any engine into any year car. It just changes the amount of work and parts that are needed to integrate it properly and retain all the factory functions. As Kanin states, if you are using a pre-7.8 DME car, you can use the 5.2.2 or 7.2 DME and a piggyback system, but to do it like a factory install you need the upgraded 7.8 DME and the other components necessary to make everything work together.

Todd