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> Question for Those Running a 3.2 Six
kenshapiro2002
post Jan 16 2026, 01:38 PM
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I’ve had four 914s, but this is my first six, a late eighties with MoTronic FI. It has headers with megaphones… no muffler. Getting ready to install a Dansk sport muffler. Will the MoTronic be able to read the change and adjust or will that need to be done by a humanoid, lol. If the latter, will she run well enough to get her to such a humanoid ten miles away?
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ClayPerrine
post Jan 18 2026, 07:33 AM
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If you try to run factory 914-6 heat exchangers with a 3.2, you will be restricting it's horsepower. The 914-6 heat exchangers were designed with a 2.0L motor in mind. The tubes are too small for a 3.2 engine.

I would suggest a set of aftermarket heat exchangers sized for the 3.2 motor. 993 heat exchangers can be reworked to fit a 3.2, and they will flow just fine. There are also aftermarket heat exchangers out there that are copies of the factory units with bigger tubes.

And the expression is "There is no replacement for displacement." I should know. (IMG:style_emoticons/default/biggrin.gif)
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kenshapiro2002
post Jan 18 2026, 02:04 PM
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QUOTE(ClayPerrine @ Jan 18 2026, 08:33 AM) *

If you try to run factory 914-6 heat exchangers with a 3.2, you will be restricting it's horsepower. The 914-6 heat exchangers were designed with a 2.0L motor in mind. The tubes are too small for a 3.2 engine.

I would suggest a set of aftermarket heat exchangers sized for the 3.2 motor. 993 heat exchangers can be reworked to fit a 3.2, and they will flow just fine. There are also aftermarket heat exchangers out there that are copies of the factory units with bigger tubes.

And the expression is "There is no replacement for displacement." I should know. (IMG:style_emoticons/default/biggrin.gif)


I am running European Racing Headers with no heat exchangers.
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kenshapiro2002   Question for Those Running a 3.2 Six   Jan 16 2026, 01:38 PM
mate914   Yes   Jan 16 2026, 02:09 PM
kenshapiro2002   Yes to which of my three questions, lol?   Jan 16 2026, 02:21 PM
mate914   Yes to which of my three questions, lol? I only ...   Jan 16 2026, 02:27 PM
Ninja   The back pressure change is tiny until WOT and may...   Jan 16 2026, 02:40 PM
mepstein   I think you will be fine but if not, head up to ou...   Jan 16 2026, 03:20 PM
worn   I think you will be fine but if not, head up to o...   Jan 17 2026, 08:22 PM
930cabman   I think you will be fine but if not, head up to ...   Jan 18 2026, 06:36 AM
ClayPerrine   If you try to run factory 914-6 heat exchangers wi...   Jan 18 2026, 07:33 AM
kenshapiro2002   If you try to run factory 914-6 heat exchangers w...   Jan 18 2026, 02:04 PM
mepstein   I don't know of any aftermarket heat exchanger...   Jan 18 2026, 07:41 AM
ClayPerrine   B&B (downvote... they suck.) Their quality co...   Jan 18 2026, 08:01 AM
mepstein   B&B (downvote... they suck.) Their quality c...   Jan 18 2026, 02:58 PM
Ninja   [quote name='worn' post='3241279' date='Jan 17 20...   Jan 18 2026, 02:51 PM
wndsrfr   [quote name='worn' post='3241279' date='Jan 17 2...   Jan 18 2026, 04:19 PM
Steve   I ran stock 914-6 heat exchangers on my stock euro...   Jan 18 2026, 05:10 PM
scallyk9   I ran stock 914-6 heat exchangers on my stock eur...   Jan 20 2026, 02:58 PM
kenshapiro2002   Nice way to hijack a thread guys, lol!   Jan 18 2026, 06:51 PM
Cairo94507   I run Ben's SS heat exchangers on my car. I h...   Jan 20 2026, 03:45 PM
Steve   The motronic DME injection will automatically adju...   Jan 20 2026, 05:42 PM
Justinp71   Typically Injection systems can compensate by chec...   Jan 21 2026, 12:53 PM


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