VHPD Emerald map files wanted

[ortope]

Once I got a proper reading from the MAP sensor, this left me pretty sure I have low manifold vacuum. At idle the MAP reading is around 75-80kPA which is not great (left the data plot on my other laptop). I’ve since checked all the hoses, and hooked up a manual gauge (thanks, eBay!) to the spigot on the intake which marries with the sensor reading:

(Maths: -20cmHg is about 26kPa. 101 - 26 = 75kPa absolute pressure)

Also did a compression test which looked good (I think) - near as dammit 160psi across all four cylinders (cold).

So I’m back to either:

• valve or ignition timing is way off
• intake manifold gasket leak
  

Time to call in the professionals I think!

Edit to add: compression is actually a bit low for a VHPD?

I would check the timing first,
On my engine it was totally wrong.
Setting it in the correct way, the rest of the setting was an easy task.

Cheers

[dris]

Cheers for the info on the MAP sensor, really useful especially for those alp drives.

FWIW my compression was around 200PSI cold and 225PSI warm,

Cheers yeah thinking it should be >200. Could just be a crap gauge, it didn’t actually hold the reading properly anyway, so going to send it back and get someone with some proper kit to test.

On the plus side, I think I might have found the (or at least one) issue. The crank position sensor setup appeared to be wrong:

Reference position according to all the info I can find should be 110 not 120 BTDC. No idea how/why it’s set to 120 but set to 110 the difference is night-and-day Can hardly say it runs like a dream but much more like a VHPD should

Can anyone confirm these settings look right?

I have Keith’s (winthattt) old Emerald with the base settings on (the settings that are not transferable by the .map files)
I’ve just put the Emerald back on the car and looked into this.

According to the emerald the car was mapped with the reference position of 107 deg BTDC.
Although I also read everywhere that 110 BTDC is correct there is a procedure to follow to get to this result involving a timing strobe (its in the emerald setup options).
This is quite difficult as its impossible to see the timing marks without removing the rear wheel and arch liner.

[EXG932]

Hi did you try Dave at Emerald

[EXG932]

I know im sooooo late here . Just forthe record -Mine has / was a brand spanking new PTP Engine I speced myselfwhich included piper verniers and a few other bits and bobs. collected it on pallet and fitted myself . Propabably a decade later 2021 … bucket list job,took it Emerald and hadthe pleasure of DAve Walker himself map it . its logstory and struggl;ig with a sticky keboard eeeeeeee yuk. When i get my new laptop ill I update ill writeit… Man… what adifference . but i wouldt sharemaps cos its a big risk, 196hp tad uder 8krpm The yellow plastic squeals with delight . ttfn dave