XR4i with Cosworth BOB v6 - retrofit VIS
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- เผยแพร่เมื่อ 1 เม.ย. 2020
- How to retrofit variable intake system (VIS) to your Cosworth v6 using ViPEC ECU and BMW EGR vacuum solenoid.
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Nice insight, man. And some fine fabrication work.
I'll be putting the BOB engine in my Sierra also and will try to make use of the VIS.
Thank you for the comment! If you hook up your VIS, use some quality silicone hose. I had to change a leaking hose last summer and I assume that I have to change the rest on the summer to come. Also, Iif you use aftermarket ECU, do have the engine dyno tuned and set the valve position according to the power output of the engine with valve open and closed. Factory ECU is what it is, but you can tune the aftermarket one to switch on and off when needed.
I did do another video on the cut off times I found on the internet. Not sure they are 100% correct though.
That's some valuable information! I'm planning to go the turbo route and am very interested as to VIS impacting the preformance under boost. I'm assuming it will be much less noticeable in comparison to N/A, although might help in the no/low boost area. @@myfordxr4i
I agree on your assumption that the effects will be less noticeable in turbo application. If I were you, I'd start with the basics to get those dialed in. Have a sequential injection (standard ecu is batch fire) and adjustable boost controller to give that low rpm oompf. You will be miles ahead anything stock BOB power can deliver.
Ford VIS is really a N/A application and outdated as such. Just hang the port open to allow for long runners to work and compensate mid (2000-3000) rpm with boost. Less fuss with all the vacuum stuff, too.
Best of luck with your build. Look forward to seeing it!
@@HappyDayGarage