I have a 2001 gsr that I have had the engine built on it. I want to dyno the engine but the only dyno I have use of is just a engine dyno not a chassis dyno. My question would be what is the easiest way to hook up the ecu to the engine so I could make a pass on the dyno. Would I need just the engine harness or that plus a lower harness. Any other suggestions. I live in western ct.

 

Do your self a favor, use a chassis dyno unless you are doing some kind of r&d on different engine parts etc...

 

well I just dont know how well its gunna run because of the obd2 mess. I have alot of work into it and I dont want to put it in to find out how it runs if I could just easiealy engine dyno it. I had seperate people take the engine out, and had someone else build the engine. basically I dont want the other guy to install it if theres any chance of a problem occuring and have him try and fix it. If I could just have the same guy that built it dyno it and make sure everything is perfect then the other guys can just throw it in and be done with it, no problems. If im not mistaken the I think the engine harness hooks directly to the ecu then I would just need to jump out the starter and it should run cause I would have all the sensors hooked up and the ecu runs the car. I just wanted to know if anyone else have ever done it or has any easier method.

 

You may want to consider the 99-00 Civic si harness, it is a one piece harness with out subharness connectors at the strut towers, you will still obviously need to wire some things, although you will get alot of junk out of the way with the subharness connectors present in the integra / civic (92-95) harnesses.

 

alright thanks. I just bought one on ebay but my next question would be would i need the transmission attached when it gets dyno'd due to the speed sensor being located in the transmission. only because vtec partly works off the speed sensor?

 

hmm, engine dyno's do not use a transmission. (at least all the ones ive ever seen). Depending on the type of computer you are using, its usually not an issue. Even if you are using hondata and for some reason run in to that issue, you can use a GPO (general purpose output) and just set it to give the solenoid 12V when ever you want vtec to activate and just make sure and set the GPO rpm and the VTEC engagement rpm the same so the computer changes to the high speed map when the solenoid is activated obviously.

 

what type/model of engine dyno?

 

Im not really sure. He does mostely v8 engines. this is just a special occasion. He is recgonized by the NHRA for his motor work and engine builds.

 

thats cool. engine dynos have their ups/downs just like chassis dynos. but i do agree that carb motors are the better choice for engine dynos

 

well what i tink im gunna do about the speed sensor thing is just put the vtec solenoid on a toggle switch, im just not sure if I engage vtec at the wrong time it might mess it up