Scott_

Thanks for the feedback on it. I’ll report back when I get to that stage of the installation. Scott

I thought it should be straightforward as well but what sent me down this rabbit hole is that the K series VVC features two solenoids, VVC- and VVC+, that facilitate oil flow to a valve. This valve activates eccentrics that, instead of advancing the timing, alters the speed of the cam rotation throughout the cycle. So unlike simply advancing or retarding the entire camshaft, it modifies the cam period and the duration of the inlet valve opening by employing this eccentric drive arrangement. When fully off, the K VVC has the shortest duration. As you want duration to increase, the rotation is slowed down when the opening begins until it closes, allowing for more overlap at the opening and delayed valve closing. I was uncertain whether the stock ECU simply switched on and off the solenoids at a specific RPM or if it employed a push/pull to provide intermediate speed settings across RPM or loads. I think it’s the former, at least that’s how I’m going to approach it with a 3000 rpm switchover. I’m open to any ideas. Scott

That's pretty cool. There was an HP Academy video posted sometime back on youtube where the presenter took ecu tuning advice from AI with some interesting results, but my take away was so long as the input information and parameters were solid the results could be very useable like in your use case. As I am learning the Haltech software I've asked for input from chatgtp on settings and menu choices and it's been helpful as a learning tool. It walked me through things like how to set up generic outputs with no issues. Scott

Looking at the Emerald file answered my questions. Thanks @slowdude I don't know if it precisely mimics the MEMS control strategy but what the Emerald appers to do is make it RPM dependent and it starts increasing the duration of the intake valve opening at 3000 rpm, decrases it slightly from 4000 to 5000 rpm and then starts towards maximum duration at 7500 rpm. Scott

I think it is a speedometer cable to hall effect sensor. You might be able to find something that can be made to work using those search terms if you cant find the exact part you need. For teh part,yYou might want to check with Smiths gauges. However, a search reveals something like: https://www.jegs.com/i/JEGS/555/41610/10002/-1?gad_source=1&gad_campaignid=20673855490&gclid=Cj0KCQjwyr3OBhD0ARIsALlo-OnLAggQKGkj5Ur7uJQ7ydEOTS2aliLZXcTNc_n4DiLW-pzjcBXz_bAaAgUrEALw_wcB

that is awesome, and thank you for the map and links no to Andrew. I’ll download the emerald software and take a look. Scott

I am doing a Duratec swap towards the end of this year on my '99 Caterham 7 K series VVC. I have been collecting parts, have a block coming from Esslinger, and recently bought a Haltech R3 ecu for the swap. (I have prior experience with a Haltech ecu in a Miata race car I once owned and think the R3 would be perfect for the Duratec.) I have been entertaining the idea of installing the Haltech R3 ecu in my running VVC-engined car this spring. This would allow me to sort the wiring under the dash and harnesses in advance of the Duratec swap and I will know I have a fully functioning and tested system for the new engine to be hooked up to with only an updated engine harness. I have worked through all the sensors and developed a wiring diagram for the Haltech/Rover engine on paper and the only hang up I have is the intake cam control strategy. There are multiple options available in the Haltech and I feel certain one could be made to work with the unique Rover setup. For example, I could easily switch from vvc- solenoid to vvc+ solenoid at a set RPM and above a set oil temperature, but I'm thinking the stock control might be more sophisticated than that. Has anyone scoped a MEMS2 or 3 VVC to get a handle on the control of the two solenoids or does anyone have an understanding of the control strategy that they would be willing to share? I know the Emerald ECU does it so there must be a cam control setup screen but I have no access to a base map for the VVC engine to look at in the Emerald software. Thanks, Scott

Dropped by a Cars and Coffee in Lillington NC this morning after a morning drive.

I'm assembling parts for an engine swap later this year and am in need of a duratec exhaust. The engine is a 2.0L near R500 spec. Thanks, Scott

I was in touch with him this week as well asking of any fitment issues I'd need to watch out for with a tracsport in a Sierra diff housing. He was very helpful.

Nice! I like color!

For my Caterham 7, a 1999 model, I went with Hagerty and agreed upon value of 40k with cherished salvage and 1k deductibles and it came in at $620.

Had I not found an S3 with a lowered floor it would have had to been the SV for me. As it is, the S3 is another reason I have not to gain any more weight.

http://www.dvapower.co.uk/