'91 Integra motor in '89 Civic... NEED HELP Please

Hey, my friend wrecked his '91 Integra so he decided to put the motor ecu and all in an 89 Civic. He got it all together and it runs fine but he says the same motor was a lot faster when it was in his Integra. Could it be fuel pumps? Anyone have ideas? thanks

Did you make sure you switched everything out? There could be a couple things on the integra that you didnt switch out. It couldve also had something done to it in the accident.:confused: :D If your using anything that was on the civic originally(such as the fuel pump like you mentioned), it would be best if you switched everything out so it runs better.

After you switch everything,It's not a bad idea to have a second opinion on the matter. Have a machanic (older in perticular) go behind and double check everything to make sure there's nothing you may have forgotten or missed along the way.