1993 Holden Commodore VR Ute Australian

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AndreyB
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Re: 1993 Holden Commodore VR Ute Australian

Post by AndreyB »

Lovely :) I see some soldering in your future!

Let's start with the power supply? I've added some tips to the wiki page:

http://rusefi.com/wiki/index.php?title=Manual:Hardware_Frankenso_board#Power_Supply

Also the black headers - I've tacked them to the board because I had to remove three pins to work around some mis-tracing issue with this revision, so don't be surprised why three pins are not there. Please solder the rest of the pins.

Later on http://rusefi.com/wiki/index.php?title=Manual:Hardware_Frankenstein_board would be useful for other sections of the board.
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Poseidon
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Re: 1993 Holden Commodore VR Ute Australian

Post by Poseidon »

Thanks mate, just doing some planning as it's school holidays here my girls are home will be asking a couple questions before I start I'm sure.....


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Re: 1993 Holden Commodore VR Ute Australian

Post by Poseidon »

More work getting plenum and everything ready to finish assembly of motor and start cleaning up wiring...ImageImage


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Poseidon
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Re: 1993 Holden Commodore VR Ute Australian

Post by Poseidon »

And intake elbowImageImage


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Re: 1993 Holden Commodore VR Ute Australian

Post by Poseidon »

Not sure if I should put this under hardware but my question is. I have a MAF sensors from a late model commodore and I'm wondering if I can add this to my system. From what I have read MAF is more precise than running MAP even though MAP supposedly is used in higher HP applications since we have custom ECU wouldn't running both be best of both worlds as far as computations in the ECU or does this over complicate things??


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AndreyB
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Re: 1993 Holden Commodore VR Ute Australian

Post by AndreyB »

There is a bit of a MAF against MAP jihad and I do not have an opinion on that. Either would work for our purposes, you can install both but at this point it would be either or, one would not be used by the ECU.
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Re: 1993 Holden Commodore VR Ute Australian

Post by Poseidon »

In that case which is easier to use as I have both??? But the MAP is stock...


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Re: 1993 Holden Commodore VR Ute Australian

Post by Poseidon »

Considering I'm thinking of putting two throttle bodies on maybe staying with MAP sensor is the way to go...


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Re: 1993 Holden Commodore VR Ute Australian

Post by AndreyB »

If you have MAP and you have TPS as backup you should be good.
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Re: 1993 Holden Commodore VR Ute Australian

Post by kb1gtt »

MAF generally wants laminar single direction air flow to maintain accurate readings. When you cram to much air through the manifold you generally get into turbulent flow, which results inaccurate readings. As well things like overlapping valves can create spikes of backward air flow. These spikes of back flow, will be seen as extra forward flow which is kind of a double whammy for hot CAM's. The MAF has a slower response than MAP, so you can't avoid the inaccurate readings via crank window, or other such approaches. This is why many OEM's use MAP at high RPM and MAF at low RPM. At low RPM you can get more accurate readings from MAF, which allows for better fuel economy and softer idle. However at high RPM, the turbulent flow makes it hard to predict rich vs lean. As well performance folks often prefer to not have obstructions / restrictions in the air flow.

If you plan for significant light duty driving, I would suggest planning for both sensors, but expect to use MAP for most of the RPM range, and use MAF below something like 2kRPM. If you are less concerned about a smooth idle, and more concerned with peak performance, I would suggest MAP only.
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Poseidon
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Re: 1993 Holden Commodore VR Ute Australian

Post by Poseidon »

Well I believe cruise at 100 k/ph is usually about 2k rpm in 5th gear... So would would you say having a software option to choose between sensors to use be something that is possible???

And more work work on intake done here...
ImageImage


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Re: 1993 Holden Commodore VR Ute Australian

Post by AndreyB »

Poseidon wrote:Well I believe cruise at 100 k/ph is usually about 2k rpm in 5th gear... So would would you say having a software option to choose between sensors to use be something that is possible???
Yes eventually, no I do not really see this happening within the next three months - need to take care of all the more important stuff right now.
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Re: 1993 Holden Commodore VR Ute Australian

Post by Poseidon »

That's heaps cool as it's not until I've fabricated the dual throttle body that I'll have any concern with switching back and forth....
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Poseidon
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Re: 1993 Holden Commodore VR Ute Australian

Post by Poseidon »

Been awhile since I last posted. Plenty going on as she is now running as of today that is! Next step finish suspension then road worthy and on to ecu upgraded to rusefi!!!


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Re: 1993 Holden Commodore VR Ute Australian

Post by Poseidon »

https://vimeo.com/128673551 first shot!!!


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Re: 1993 Holden Commodore VR Ute Australian

Post by Poseidon »

https://vimeo.com/128673606 First run, "SHE LIVES!!!"


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Re: 1993 Holden Commodore VR Ute Australian

Post by Poseidon »

https://vimeo.com/128673723


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Re: 1993 Holden Commodore VR Ute Australian

Post by Poseidon »

https://vimeo.com/128673770 Port and polish goes a long way to making a beast!!! Can't wait to have it running on Rusefi!!!


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Re: 1993 Holden Commodore VR Ute Australian

Post by Poseidon »

Guess this is proof, " this ain't my first rodeo! " and damn I love rodeos!!! It pays to have patience and perseverance and be meticulous about cleanliness lol!!!


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Re: 1993 Holden Commodore VR Ute Australian

Post by kb1gtt »

Cool and that's good progress. Let us know if there is anything you need for support make that a rusEFI beast.
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Re: 1993 Holden Commodore VR Ute Australian

Post by Poseidon »

Thanks KB as soon as I can, I'll be assembling, as I now have a solder/heat gun station. I just got it this month. I still need to figure out what way I'm going to go for an oscilloscope, as I have realised just how valuable it could be to get multiple signals.


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