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Old 06-12-2019, 12:07 AM   #1
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2.7 swap for 2.5? (Blown motor)

I blew my motor a couple weeks ago on the track and need a replacement. The S motor is going to require too much work but an early 2.7 might be a good fit. I have an early 97 2.5 with a non-programmable ecu. Can I use my 2.5 ecu with the 2.7? Iím assuming the transmission can handle the 15 extra HP. Anything else I need to be concerned about?


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Old 06-12-2019, 04:07 AM   #2
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I'm not sure a 2.7 will be much if any less work than a 3.2. you still need to active the resonance tube, you still need to convert back to the cable throttle body, and you might run into issues with the ecu.

If you're thinking about a 2.7, I'd just find another 2.5. The difference in power is negligible.

I'm so happy that I went with the bigger engine, really ups the fun factor.
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Old 06-13-2019, 01:17 AM   #3
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Did you go from a 2.5 to a 3.2? What transmission did you use?
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Old 06-13-2019, 04:16 AM   #4
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yes, 2.5 to 3.2

Stock 5 speed tranny (which i recently grenaded, but that seems common even on spbs).

Pretty easy swap.

Adjust wiring in dme, reuse old harness, get 3.4 996 cable throttle body, and fabricate intake tube. I also used a 987 airbox.
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