Matching Numbers

[ike84]

Here's a list of the 4.2 V8s that I compiled. There are essentially 3 generations here - belt driven, chain driven, and then the fsi.

The belt driven motors are essentially bulletproof and can be had for $500 on ebay. Nearly identical size to our flat 6 and mount to the 986 5 speed and 987 5 /6speed tranny's without modification. Custom mounts will need to be fabbed but it's not overly complicated. Huge aftermarket for mods, especially for forced induction applications.

The chain driven are also great but they have an issue with the chain tensioners - 3 hour job to fix with the motor out of the car but parts are stupid expensive (3k if I remember correctly).

The fsi generation are really fantastic but the ecu gets complicated and aftermarket ecu's aren't an option unless you use motronic (again, big $).

Please don't hold me to any of this, all if this is info that I gathered in piecemeal fashion online. There's only one really well documented build with an ABZ in a 986 to a 5 speed transmission that I have been able to find. He did a fantastic job and at the end of it had a great looking and running vehicle. Truegearhead is building in that platform but he is doing a twin KKK turbo application mated to an 01e transmission and is shooting for a 700hp rocket ship!

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[Starter986]

Originally Posted by ike84

Here's a list of the 4.2 V8s that I compiled. There are essentially 3 generations here - belt driven, chain driven, and then the fsi.

The belt driven motors are essentially bulletproof and can be had for $500 on ebay. Nearly identical size to our flat 6 and mount to the 986 5 speed and 987 5 /6speed tranny's without modification. Custom mounts will need to be fabbed but it's not overly complicated. Huge aftermarket for mods, especially for forced induction applications.

The chain driven are also great but they have an issue with the chain tensioners - 3 hour job to fix with the motor out of the car but parts are stupid expensive (3k if I remember correctly).

The fsi generation are really fantastic but the ecu gets complicated and aftermarket ecu's aren't an option unless you use motronic (again, big $).

Please don't hold me to any of this, all if this is info that I gathered in piecemeal fashion online. There's only one really well documented build with an ABZ in a 986 to a 5 speed transmission that I have been able to find. He did a fantastic job and at the end of it had a great looking and running vehicle. Truegearhead is building in that platform but he is doing a twin KKK turbo application mated to an 01e transmission and is shooting for a 700hp rocket ship!

Sent from my POCOPHONE F1 using Tapatalk

I plead ignorance. I've read of the various engine swaps... to a 5/6 speed. Can the same swap work with a tiptronic? Thank you.

[ike84]

Originally Posted by Starter986

I plead ignorance. I've read of the various engine swaps... to a 5/6 speed. Can the same swap work with a tiptronic? Thank you.

I truthfully have no idea. Most swaps to other motors require a second stock ecu to run the motor while the original pcar ecu stays to manage the rest of the vehicle. Tiptronics rely heavily on the ecu for operation so I don't know how that would jive

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[itsnotanova]

Originally Posted by Starter986

I plead ignorance. I've read of the various engine swaps... to a 5/6 speed. Can the same swap work with a tiptronic? Thank you.

I think in theory I would say yes as the tiptronic is also used in Audi's. Paired with an Audi motor I imagine it will work. I have a friend I sold a manual 99 boxster to and he plans on using a 2.7TT with a tiptronic. I told him he was crazy but he loves tinkering with tips.

[986 Boxster]

It all depends, if you plan on keeping the car forever, than to me it would not matter matching numbers, if not, then a lot of people like matching numbers when they are buying a car. They think something is not right with the car if it`s not matching numbers, I don`t know . That's a lot of money that you are putting into the car, so I`m assuming you are not planning on getting rid of the car anytime soon. I heard of someone that put in a used 2.7L motor + new clutch, etc, for about $12.000.00 at the Porsche dealer and then he couldn't get the car sold at all private, he was even losing money at his asking price but no one seem interested, he ended up trading it for something else.