Hi so im putting a ecotec motor into my vr commodore and iv heard i can run the ecotec off the vr computer (factory manual) il be putting the t5 manual box from the vr behind the ecotec so im wondering if i could use the VR V6 manual computer and wiring harness to run the ecotec i know its needs to be changed from a map sensor to maf would this happen in a memcal re tune?? also what else needs to be done for it to run good or would it just be cheaper and easyer to buy this off ebay. im just considering buying this kit as it has the performance tune and rev limiter bumped up. but id do it the other way if it works out cheaper and easyer in the long run.. cheers any help would be appreciated.
Holden Commodore VS V6 auto to T5 manual conversion kit | eBay
ALSO i know its been covered but im completely confused because iv been told the flywheel needs to be balanced but also been told it doesnt because its been done before and some people said its impossible to run ecotec off vr ecu since completely diff motors etc etc so just thought i would post this to see what anyone else has to say that could help
Last edited by UW1SH; 19-01-2012 at 03:24 AM.
Try searching next time there is a post in here about vr -vs engine conversion and if it's right your going to need the vs harness as the upgraded engine needs more wires for certain sensors also get the manual gearbox wiring
And Jonah if the vs and vr is anything like my old ford you can pull out the automatic computer altogether but you will need a auto sparky to wire up the reverse and neutral switch
Like i said iv searched heaps and keep getting all different storys what i am looking for is someone that has done this conversion before and gives me a straight forward answer on what needs to be cut and rewired or re programmeed or what works and what doesnt etc etc.. because alot of people have said alot of different things thats why i thought id post it so yeh
Make it easy on yourself and run a VS computer/BCM and engine harness.
Hi, my worker has just done this same conversion and had problems, we worked out that you will need to use your VR wiring loom and ECU, you will need to switch out all the sensors and Injectors using all the VR equipment on the ecotech engine. You DO NOT have re balance your flywheel unless you have modified the flywheel as they are all balanced from the factory, some high performance racers will balance the flywheel and crank together out of the engine as an added measure but this is not necessary for what you are doing.
However another problem with fitting the eco motor is that the VR headers will not fit the eco motor so you must use the eco exhaust manifolds creating a whole new set of problems because your VR exhaust is completely different to the eco exhaust and you may have to look at using the front half of the eco exhaust on the VR as well. I hope this helps. - Jon.
Was just looking through the threads and there are 2 how tos for this situation as far as ecotec engine and manual gearbox concerned
Mate I replaced the VR engine in my VB with a V6 supercharged engine. It was already running a VR engine with a VP loom and manual VP ecu & T5. I ran the supercharged V6 engine loom and use a loom as provided by V6 conversions to interface the engine loom to the car loom. I had the ecu modified by HPF to eliminate the VATS and to run as a manual. I used a VR flywheel and had it mirror balanced with the flex plate. Exhaust is different to VR.
You will have issues with the VS ecu because it needs input from the Body Control Module. I understand that the BCM also has outputs for instruments. You will need a T5 tailsaft. Bypass the auto inhibit switch and connect the revers lights. Hope this helps a bit.