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truegearhead · 01-12-2021, 03:47 PM

Thanks for reaching out over IM. As you know I put a 2.7l in my 2.5l car. You need to use the 2.7 intake manifold, and the 2.5l crossover and throttle body and the 2.5l wiring harness. The vacuum port for the second cross over can just be blocked. I used the factory 2.5l ecu. It dyno’ed at more power to the wheels then a 2.7 is supposed to make at the crank and ran great. If you need anymore help let me know, happy to help

Edit: I also used fuel rail and return system from the 2.5

01-12-2021, 03:47 PM	#5
truegearhead Registered User Join Date: Jul 2011 Location: Richmond, VA (The Fan) Posts: 978	Thanks for reaching out over IM. As you know I put a 2.7l in my 2.5l car. You need to use the 2.7 intake manifold, and the 2.5l crossover and throttle body and the 2.5l wiring harness. The vacuum port for the second cross over can just be blocked. I used the factory 2.5l ecu. It dyno’ed at more power to the wheels then a 2.7 is supposed to make at the crank and ran great. If you need anymore help let me know, happy to help Edit: I also used fuel rail and return system from the 2.5 __________________ 1997 Boxster 4.2L Audi V8 Bi-Turbo 2003 911 C2 NASA HPDE Instructor Last edited by truegearhead; 01-12-2021 at 03:52 PM.