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Old 01-19-2016, 05:38 AM   #1
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My Boxster 3.4L. Help me with the next step

Hi guys,

I am really enjoying the Boxster but I have the performance itch striking me again

Right now I have a 2002 986 with a 996 Engine, custom headers, 100 cel cats, tuned ecu. But I want to improve the performance to around +380 BHP at the crank.

What would you recommend to do?

Install a custom made supercharger kit? There is a company that claims that it can be done here in the Netherlands. Costing about 6000 USD
Search for a 3.8L X51 engine. I am wondering if I have to modify a lot to swap to a 3.8L 997 engine because the car already has a swapper 3.4 in it. A 3.8L x51 can be found for around 9000 USD.
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Old 01-19-2016, 08:29 AM   #2
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There was a guy that added a supercharger. Dr. Bodzin I believe was the user. Those newer engines are going to be a lot of money to swap...the DME needs to be completely upgraded. If you really need more power than a 3.4 liter boxster, I'm not sure the boxster is the car for you.
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Old 01-19-2016, 09:36 AM   #3
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What's your BHP now?
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Old 01-19-2016, 11:28 AM   #4
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Porsche Boxster Engine Conversion Project - 986 / 987 (1997-08) - Pelican Parts Technical Article
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Old 01-19-2016, 02:28 PM   #5
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I suggest you sell the car and buy something that is more to your preferences.

You'll have lots of difficulty swapping in an engine whose fuel delivery, wiring harness and ECU is different from the car you have.
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Old 01-20-2016, 12:37 AM   #6
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Thanks for the comments. I do really love my Boxster and see no reason to change or upgrade to another Porsche. I have had a few Porsches in the past (996 GT3 CS, 996 Carrera 4, 964 Convertible) and the Boxster is (still) a great machine.

The only optional move would be to sell the car and buy a 996 or 997 Turbo Convertible. But that would cost even more.

I always love a challenge so upgrading the Boxster is one of them . My car made 320 HP at the crank. An easy but not so wise upgrade is to go to a 3.6 tuned and have about 340/360 HP at the crank (and sell the 3.4).

This is my ride:

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Old 01-20-2016, 03:59 AM   #7
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^ Keep keep, and keep. Sweet ride

I'm having fun with a stock 2.5L modded with only a full NHP headers/100cells/muffler system and can only imagine what yours feels and sounds like. Vids of your ride in motion would be priceless to watch, if you happen to have

Luck with the upcoming upgrades bud
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Old 01-20-2016, 09:05 AM   #8
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I like to solve the weakest links 1st. If you don't have a 987 airbox you need it. Wrap it & all intake parts with gold foil for heat insulation.
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Old 01-21-2016, 09:35 AM   #9
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I wil eventually make a video of the car! As soon as the weather gets better here.

I already have some options for a supercharger. Does anyone know if the engine dimensions of a 2.7 boxster engine are the same as the 3.4?

Quote:
Originally Posted by Nine8Six View Post
^ Keep keep, and keep. Sweet ride

I'm having fun with a stock 2.5L modded with only a full NHP headers/100cells/muffler system and can only imagine what yours feels and sounds like. Vids of your ride in motion would be priceless to watch, if you happen to have

Luck with the upcoming upgrades bud
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Old 01-21-2016, 11:48 AM   #10
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Quote:
Originally Posted by Edreamsz View Post
I wil eventually make a video of the car! As soon as the weather gets better here.

I already have some options for a supercharger. Does anyone know if the engine dimensions of a 2.7 boxster engine are the same as the 3.4?
Externally they are the same except the intake manifold is about 2" inches taller due to the alloy "stacks" between the head & intake.
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Old 01-30-2016, 08:04 AM   #11
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Electronics will be your biggest issue in going to a different DME. I am just finishing an 03 986S with an 03 996/3.6 and was fortunate to have same generation DME. Softronic did ecu. Only had to add two pins/wires for variocam plus actuation.

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