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Old 12-24-2015, 06:53 PM   #1
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Will This Fit

I'm considering a 98 Boxster Roller.

http://986forum.com/forums/boxsters-sale-wanted/59838-98-boxster-blown-motor-only-30k-miles.html

My question is will this eng fit as a straight swap? Or will there be a lot of re working involved?
If so what would be involved.

3 8L Complete Dropout Engine Assembly Porsche 911 Carrera s 997 M97 01 M97 H6 | eBay

Should I consider doing this? or is this a dumb idea and run....

What are your thoughts.

Merry Xmas everyone.
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Old 12-24-2015, 08:14 PM   #2
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3.8? Nope. Not a straight swap. Gotta get a matching DME and I'm not sure the 98s can handle a 3.8 at all. Your best and easiest conversion is to find a 3.4 carrera motor from this era.
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Old 12-25-2015, 06:12 AM   #3
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Quote:
Originally Posted by jdraupp View Post
3.8? Nope. Not a straight swap. Gotta get a matching DME and I'm not sure the 98s can handle a 3.8 at all. Your best and easiest conversion is to find a 3.4 carrera motor from this era.
What is a DME?

I'd like to get a Boxster with a bit more get up and go and from what I have read the best, most reliable and least expensive way of doing this is to do an eng swap instead of trying to build one.

What combination would be the easiest and best bang for the buck?

Thanks
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Old 12-25-2015, 08:43 AM   #4
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You'll need a non e-gas 3.4 from a 1999 996. That would be your easiest power upgrade. Even at that there would a bunch of stuff you would need to change to put a rear engine 3.4 in a Boxster. The 101 projects book has a good write up on what's involved.
Then you might want to spend a bunch more time and $$ upgrading brakes and suspension since you're adding 100 more horses to a car that originally had a shade over 200.
Best of luck if you go this route; it will be a fair bit of wrenching to make it work, but you'll have a wicked sleeper on your hands when it's done.
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Old 12-25-2015, 09:38 AM   #5
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DME is the software that allows the motor to communicate with the car. Different versions came in different years. The 101 book has an extensive write up on which years are compatible with which engines. The cost of purchasing the DME software and converting your car to e gas would likely make your build ridiculous price Wise. You need a 1999 3.4 with cable throttle as stated. That is the best and cheapest swap. That said, if you want a car with a lot of straight line power, that ain't what this car is about. Just my 2 cents.
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Old 12-25-2015, 02:01 PM   #6
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Cheaper in the long run to buy one that's already been converted and sorted.
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Old 12-26-2015, 04:34 AM   #7
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I have a 3.6 2001 S which has a 2004 carrera 4s motor in it, the conversion was performed by a professional Porsche race shop, matching the DMEs and getting the software right was very complicated and the whole conversion was very expensive ($21k by previous owner). That being said it is an awesome experience to drive the 986 as is should have been all along. If you are seriously interested I would entertain a $20k offer for my car. This is not a realistic DIY project for anyone without vast knowledge or a substantial wallet.
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