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'97 850R Estate Restoration and M66D Swap (2.0)


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For the VVT controller, remember that you'll need to retrofit the multiphase cam wheel from ME7 on both cams. To do this you will have to get rid of the distributor and emulate the stock cam signal. Use the load output signal originally designed for output to the auto trans, I think it would be more suitable than tapping into the MAF. 

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  • 2 weeks later...
On 7/6/2016 at 11:51 PM, Tightmopedman9 said:

For the VVT controller, remember that you'll need to retrofit the multiphase cam wheel from ME7 on both cams. To do this you will have to get rid of the distributor and emulate the stock cam signal. Use the load output signal originally designed for output to the auto trans, I think it would be more suitable than tapping into the MAF. 

If I'm using a dual VVT RN engine, wouldn't that already have the ME7 cam wheels?  Getting rid of the distributor is no problem; I'm planning on using your setup for that.  (I'd want go CoP even without this project...love the smooth idle in my dad's '99)

Good thought on the load signal.

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On 7/6/2016 at 9:33 PM, B850 said:

Looking great! Once you work on that trim it will look amazing.

Jared, you should just send me that fender instead :biggrin:

Thanks!  Just wait till I get that bumper fixed and painted and my rear wing painted and installed!

 

You mean the fender off the wrecked car?

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On 7/15/2016 at 1:37 PM, JaredR1 said:

If I'm using a dual VVT RN engine, wouldn't that already have the ME7 cam wheels?  Getting rid of the distributor is no problem; I'm planning on using your setup for that.  (I'd want go CoP even without this project...love the smooth idle in my dad's '99)

Good thought on the load signal.

I wasn't talking about physically having the sensors on the engine, but rather dealing with the fact that the output from the ME7 cam wheel/sensor ≠ the output from the stock cam wheel.

The ME7 cam wheel has three unequal length notches, which allows the ECU to determine where the cam is within a fine range (I'm not exactly sure the exact resolution, but I think it is accurate to 1º). The M4.3/M4.4 cam wheel only has one notch, 180º in length. If you built a VVT circuit you would need to emulate this binary signal from the ME7 wheel.

You might be able to do VVT control with the binary M4.X wheel, but I think control would be limited quite a bit in resolution. 

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1 minute ago, Tightmopedman9 said:

I wasn't talking about physically having the sensors on the engine, but rather dealing with the fact that the output from the ME7 cam wheel/sensor ≠ the output from the stock cam wheel.

The ME7 cam wheel has three unequal length notches, which allows the ECU to determine where the cam is within a fine range (I'm not exactly sure the exact resolution, but I think it is accurate to 1º). The M4.3/M4.4 cam wheel only has one notch, 180º in length. If you built a VVT circuit you would need to emulate this binary signal from the ME7 wheel.

You might be able to do VVT control with the binary M4.X wheel, but I think control would be limited quite a bit in resolution. 

Ah, ok.  That totally makes sense now.

In other encouraging news, the VVT aspect of this project may end up turning into my senior project next year which would obviously give me some great additional resources not previously available to this project.  I hadn't even thought of this until my circuit theory professor suggested it when I stopped by to ask him a totally separate question about the project.  Given that, the current goal is to get the RN/M66D swap done before I go back to school in January so that the focus can be on getting CVVT at that point.

 

 

On that note, I need to decide what turbo to use.  What's the spool time like on the K24 compared to the 16T?  Trying to keep spool time down because Boston drivers/traffic suck/s.  Anyone running a K24 on a B5254T2?  Ran a search and found a bunch of people talking about throwing K24s on 2.5Ts but no real feedback as to how that's working out.

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  • 1 month later...

This post is mostly an anti-archive bump because this project is eventually going to go somewhere, but I have done a few things on the R recently.  Got the front suspension sorted so I'm actually comfortable about driving it now, and am also working on gathering the parts to do the Dolby mod in this car.

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  • 2 months later...

So let's see.....biggest thing I've done since the last post is dye the trim #lame.  There has been some slow progress on gathering parts for the build.  Hey, at least it looks fantastic sitting in my driveway now.  So I guess this is mostly an anti-archive bump.

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Edited by JaredR1
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  • 4 months later...

Alright so this project isn't totally stalled out.  I've been slooowwwwwlllyyyy gathering parts over the past several months.  Getting my T-5R repaired in time for Carlisle took up most of my Volvo time over the winter, and now I have a hard deadline to get the last few leftover things done before our summer road trips starting in July or my mom is gonna shoot me because it's the only car in the fleet with working AC :laugh:, so this means I'll have time to get back to working on the R in the next few weeks!

Used front Koni Yellows.  Picked these up for cheap to see if OEM yellow marked springs are low enough to work with them and if they are a reasonable pairing with Nivos in the back. On paper, this shouldn't work, but some of you guys here say it does so....???  Guess we'll find out.........if I don't buy a set of Öhlins first!  Then I won't care about the Nivos :biggrin:

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Angle flange 16T rubuilt 5k before I got it, Snabb intake (well, part of it at least), Blues.

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Also got a bunch of other stuff in this deal.  Probably going to just keep the stock airbox but we'll see.

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Added an OEM strut bar.

 

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And a CD changer (I didn't get a magazine with this thing.....if someone has a magazine for this style changer they would like to be rid of, please PM me)

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Manual shifter acquired.

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Roof rails from the wrecked R installed........looks SO much better and SO much more useful.  Just need to paint my rear wing and the exterior mods will be just about done.

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Now the holdup is getting the transmission here (yeah...........still).  FINALLY got the JY it's at to get it on a plastic pallet about 6 weeks ago and I thought I was ready to roll.....and then one of my classmates who works a a tuning company told me they were importing a car from near where it is soon and thought I might be able to throw it in the container with the car to save some major $$$$$.  Hopefully gonna figure out if that's gonna work or not in the next couple of weeks.

And I'm also trying to figure out what I want to do for an engine.  The B5254T2 has what I'm looking for with dual VVT and higher compression, but I've been hearing recently that a lot of people are burning valves with them.  Not good........one of the jobs I'm pretty seriously looking at for after I graduate is 70 miles away from me (~35k a year in commuting.....still cheaper than moving out LOL and that's what matters for the next few years) so I can't have an engine that's gonna burn valves regularly even when maintained well.

Edited by JaredR1
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