V8 Conversion to a NON "S" Boxster

[Wendo]

Hello Rusty
I also like the audi v8 idea.
Mainly because I have heard they bolt right up, if that is true you may gain very valuable front of engine room not adding an adapter plate.
Outside of that I can only say they do sound good.

The immobilizer has inputs and outputs like any other computer component, can be researched, understood and manipulated.
My point of interest begins more in what actually happens in the DME or ECM. The power source gets cut off by the immobilizer and that has to be via relay or silicone component, both will have metalic leads, metallic leads that are screaming for a soldered on jumper wire. SHAZAM!! engine never gets effected.
But for that matter, your Audi and my LS will both have new sensors and controllers.

Back to the many gremlins inside the immobilizer,
I think mine is ok also, but I will sleep better without it.
Again IO logic.
Its either TTL or Cmos, the only real difference is operating voltage.
I expect a lot of "if this, than that" simple logic inside. Once I enter that stage I will without any doubt master it and retain it. It will be my lifes ambition.
My goal would be to replicate it with a more user friendly and maintainable unit.
Maybe an Allen Bradley programmable controller or a simple raspberry pie PLC.
Sounds like a lot, your computer repairman wants you to think that.
Good luck and also super job you are doing on the cost Rusty.
It will be an even more massive accomplishment if you never have to feel guilty about the money.

[78F350]

Have you come across this car yet in your searches?


All new aftermarket ECU and harness setup using an LS1 throttle body on an Audi V8.
One of his for sale threads:
https://rennlist.com/forums/vehicle-marketplace/952320-boxster-s-race-car-with-audi-4-2-v8-engine-and-lots-of-motec.html

Thread here starting with a Suburu conversion, then ABZ V8. Most of the pics are gone in the Photobucket:
http://986forum.com/forums/boxster-general-discussions/25697-boxster-subaru-conversion-interest-13.htm

Much of what you are looking to do, but $10s of thousands invested. Sure that much of it can be done, scaled back, for a lot less. Sad there weren't more done like this one, no doubt that this one was sold at a loss considering the craftsmanship and hours put into it.

AND, don't forget about Vlad. I don't think he completed his swap, but lots of great info:
http://986forum.com/forums/show-tell-gallery/56050-v8-conversion.html
Rolling Shell - Follow My Porsche Boxster V8 Build

As far as S vs Base, from the transmission forward, I really don't see any difference in the mechanics of the swap.

[rusty69911]

Originally Posted by Wendo

Hello Rusty
I also like the audi v8 idea.
Mainly because I have heard they bolt right up, if that is true you may gain very valuable front of engine room not adding an adapter plate.
Outside of that I can only say they do sound good.

The immobilizer has inputs and outputs like any other computer component, can be researched, understood and manipulated.
My point of interest begins more in what actually happens in the DME or ECM. The power source gets cut off by the immobilizer and that has to be via relay or silicone component, both will have metalic leads, metallic leads that are screaming for a soldered on jumper wire. SHAZAM!! engine never gets effected.
But for that matter, your Audi and my LS will both have new sensors and controllers.

Back to the many gremlins inside the immobilizer,
I think mine is ok also, but I will sleep better without it.
Again IO logic.
Its either TTL or Cmos, the only real difference is operating voltage.
I expect a lot of "if this, than that" simple logic inside. Once I enter that stage I will without any doubt master it and retain it. It will be my lifes ambition.
My goal would be to replicate it with a more user friendly and maintainable unit.
Maybe an Allen Bradley programmable controller or a simple raspberry pie PLC.
Sounds like a lot, your computer repairman wants you to think that.
Good luck and also super job you are doing on the cost Rusty.
It will be an even more massive accomplishment if you never have to feel guilty about the money.

I think the issue is the immobilizer is also the body control module, the start part is easy to bypass if your doing an engine swap but the issue is the signal it generated to the ECU to allow start for a standard motor is hard to replicate, its not an on/off input/output arrangement, if it was it would be pointless having it as an immobilizer as it would be too easy to be overridden, the windows can be hard wired or done with relays, although the pull the door handle and the window drops a bit function will need some thought, the central locking can be bypassed, Ive seen a writeup on the net somewhere