Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical chat

LinkBack Thread Tools Display Modes
Old 06-30-2010, 02:00 PM   #1
Registered User
Join Date: Jun 2010
Location: Slovakia
Posts: 1
996 engine into a Boxster?

Hey there , Boxster people!

I have a 2000 2.5 Boxster and I was having big fun driving this car until I drove a 3.4 Cayman a week ago and from that time I just cant fight the thought of putting a 3.4 in my Boxster...

I was wondering if you could give me some advice about fitting a 911(996) 3.4 engine into the Boxster because I found a wrecked one in near Germany for less than 7 grand which I would love to spend to get the Boxster moving like the Cayman.

I know that maybe fitting a Cayman engine would be easier but those go for 16k and more (wrecks) and thats too much for me right now.

Roleta is offline   Reply With Quote
Old 06-30-2010, 02:20 PM   #2
Registered User
Join Date: Jun 2007
Location: Littleton, CO
Posts: 456
You would be well-served to search this site, as well as Flat 6 Innovations.
"Of all the extreme sports I've ever participated in- windsurfing, kite boarding, wake boarding, tow-in surfing and snowboarding- skiing, for me, made everything else easy."
-Chuck Patterson
Pat is offline   Reply With Quote
Old 06-30-2010, 02:52 PM   #3
Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 5,082
A 3.4 from a 911 will fit, but will take some work. Because the intake is taller, the engine mounts need to be lowered slightly (I think someone is making a kit for this), and depending upon the year, you will need to swap the DME. There will also be assorted wiring and plumbing issues to deal with as well, but this swap has been done several times, and one was written up in "Excellence" magazine not too far back.............
Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
JFP in PA is offline   Reply With Quote
Old 06-30-2010, 07:01 PM   #4
Registered User
JAAY's Avatar
Join Date: Dec 2006
Location: shoreham, ny
Posts: 1,619

I think it will fit.
996 3.4 engine with 2.7 986 5speed transmission
Ebay Headers, Fabspeed high flow cats, JIC Cross, IPD Plenum, H&R Coilovers, B&M Short Shifter, AEM Uego Gauge Type Analog, Apexi S-AFC Select, 987 air box, Litronics, 2000 Tails and side markers, painted center console, 18" 987 S-Wheels, GT3 Front bumper with splitter.
JAAY is offline   Reply With Quote
Old 07-01-2010, 04:24 AM   #5
Registered User
landrovered's Avatar
Join Date: Nov 2009
Location: Madison, Georgia
Posts: 1,012
If you stuff enough money into the intake manifold it will fit right in no prob...the 3.6 conversion on my car done by the PO was $21k.
2001 Boxster S 3.6L, Zeintop
"Calling upon my years of experience, I froze at the controls." - Stirling Moss
landrovered is offline   Reply With Quote
Old 07-06-2010, 07:15 PM   #6
Registered User
Join Date: Feb 2010
Location: Dallas, TX
Posts: 164
Installing a cayman engine into your 2000 Boxster would be difficult. Easiest swap would be a 3.4L 996 e-gar carrera engine. Feel free to pm me if you have any specific questions regarding the swap.
1999 Boxster 3.4L
2007 BMW 328i
1992 Jeep Wrangler
BudmanV24 is offline   Reply With Quote
Old 09-05-2010, 12:26 PM   #7
Registered User
Join Date: Sep 2010
Location: DC
Posts: 4
Hi there - new to this forum. I have an '03 Boxster S with the 3.8L 997 S motor in it. Roock did the conversion a few years back. It was pricey and a real pain to get all the electronics sorted out but it turned out very nice in the end.
poor-sha is offline   Reply With Quote
Old 09-06-2010, 06:21 AM   #8
Registered User
Join Date: Jan 2007
Location: Depends on the day of the week....
Posts: 1,400
If you have a 2000 it's a 2.7 or 3.2. If you get an e-gas 996 3.4 motor it will go semi easily. The DME is the same and you'll just need to flash the 996 3.4 program to it (you will need access to a PST2 to do this). Your Boxster harness will plug right onto the 3.4. That solves the electronics side.

Now, to get the motor into the car physically, you will need to lower the engine a bit to clear the manifold under the engine cover. Most people use spacers at the front engine mount, and 964 mounts for the tranny.

You'll need to carry over some pieces from your Boxster motor (oil fill tube, dipstick tube, a couple coolant housings, and hoses) but it's not too bad.

The engine will bolt up just fine to your transaxle, but you'll likely want a stronger clutch.

Good luck!
Boxster S
Cloudsurfer is offline   Reply With Quote
Old 09-06-2010, 11:43 AM   #9
Registered User
Join Date: Jun 2005
Location: Toronto
Posts: 157
Here is a link to a tech article that covers many of the issues with the conversion you are interested in.

1997 Boxster
Aron in Toronto is offline   Reply With Quote
Old 09-06-2010, 04:42 PM   #10
Registered User
Join Date: Jan 2007
Location: BC
Posts: 1,259
I've been led to believe that the early 3.4 M96 is even more problematic than the 2.5, 2.7 or 3.2. Does anyone have any info that supports or refutes that?
2001 Boxster, 5 spd, Seal Grey
clickman is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -8. The time now is 05:05 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page