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'84 Velnas Trip Computer


Starfighterpilot
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My '84 Starion ES -may she happily be in Starquest heaven- had the Velnas (I think that's the way it's spelled) trip computer. I really enjoyed playing around with it when I was driving cuz it could display a lot of real time info. Especially actual real time MPG.

 

I was thinking about this a month ago during my trip home back to Atlanta from Tulsa (the mind wanders in strange directions when driving an 11 hour trip by yourself). But I do not remember where the sensor was for measuring the actual fuel the injectors are using.

 

I really wish that a '84 Parts Catalog was available to look this up. Anyone got one stashed away?

 

Anyway, if anyone still has the Velnas system/circuit installed, could you take a picture of this fuel flow sensor and post it?

 

I'm thinking that it was installed in the TB top cap where the rear facing plug is on the later models. But I'm probably wrong.

 

Are there any identifying designators on the sensor?

 

Can anyone help me out?

 

Thanks :)

 

KEN

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I looked through an 84 Mopar import parts catalog and couldn't find anything related to velnas. There was no extra sensor shown on the mixer. No listing for the velnas itself or any of its harneses and trim.

 

Maybe an mitsu parts book would have it or possibly a different years book.

 

mm

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If there was a fuel flow sensor, there would have to be two of them. One measuring outgoing to the fuel rail, and one measuring return.

 

But, pretty sure the calculations were based on air flow mainly. The ECU controls fuel directly by readings of the air flow sensor, a simplified way of saying it.

 

So, in short... it's inside your air can.

 

-Robert

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From what i remember it was based only on the injector firing rate(which was calculated based on all those other things). It was only pulled from one injector, not both though. Of course it also grabbed vehicle speed. Next time i pull out my factory service manual ill dig through it and see if there was any mention of it.
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  • 2 months later...
Shift1313 is fundamentally correct. Fuel usage was determined by monitoring an injector, since in the early models they fired in parallel rather than the primary-secondary arrnagement in later models. I installed a VELNAS in an '89 and this is the aspect which doesn't function properly, resulting in MPG calculations being incorrect.
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I can tell you anything you'd like to know. My car has one, and I've spent a bit of time working out all the wiring and how they actually work. Installing one into a car that never had one would actually be very very simple.
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The unit consists of three parts, a control unit, display, and speed sensor. The display takes the place of the regular clock, and the speed sensor sits in the gauge cluster. I've only personally seen velnas units factory fitted to vehicles with the semi-digital dash fitted. However, I've seen pictures of them in vehicles with an analogue dash, which leads me to believe some of these dash's also had a speed sensor fitted.

 

The control unit provides a clock, alarm, and stopwatch timing functions. It also provides a second trip computer (in addition to the mechanical one on the gauge. It also shows average speed, overall fuel consumed, and current fuel consumption rate.

 

The unit gets the speed signal from the speedo sensor, and taps into the ECU side of no2 injector (however, the unit was only ever fitted, I'm pretty sure, to alternating fire injection models with the same size injectors, so either injector could be used). It also takes a constant 12v course, an 'ACC' swtiched 12v source, and an 'ON' switched 12v source, plus a ground.

 

Vehicles with a velnas unit are wired slightly differently to usual models, in that there is a different loom added in, which runs from the control unit to the display. This is (I think...) 10 wires, and completely self-contained. This means if you find one, you can cut the plugs, and then re-make the loom, matching colour for colour.

 

I think they only came in the early Technica models over there?

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. I've only personally seen velnas units factory fitted to vehicles with the semi-digital dash fitted. However, I've seen pictures of them in vehicles with an analogue dash, which leads me to believe some of these dash's also had a speed sensor fitted.

 

I think they only came in the early Technica models over there?

 

My car has a full analogue dash and a factory installed VELNAS, so I can confirm the first statement. As far as what models they came in, they were also installed in ES models. An ES has all of the Technica parts minus the digital dash as far as I can tell. My ES has leather,power, cassette, VELNAS and LSD.

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BradD - Very cool to know, cheers. Would love to see some pics of your car?

 

(edit) - OH! and your sapporo! MUST HAVE PICS!

Edited by ZacMan
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BradD - Very cool to know, cheers. Would love to see some pics of your car?

 

(edit) - OH! and your sapporo! MUST HAVE PICS!

 

Dont want to go SUPER off topic but here ya go (Shameless show off time....)

The ES (Currently under the knife for full body and paint... build thread coming soon!)

 

http://farm4.staticflickr.com/3232/4552760773_4f8c95700c_b.jpg

 

http://farm4.staticflickr.com/3200/4552765557_4776100070_b.jpg

 

The Sapporo....

http://farm8.staticflickr.com/7238/6953445056_b63c37ab86_b.jpg

 

http://i281.photobucket.com/albums/kk228/hillbillyhector/grandmas%20corolla/vintage%20japanese/DSC_0001.jpg

 

http://i281.photobucket.com/albums/kk228/hillbillyhector/grandmas%20corolla/vintage%20japanese/DSC_0014.jpg

 

Here is a link to the thread on the car when the previous owner found it in a junkyard!!! http://japanesenostalgiccar.com/forum/viewtopic.php?f=6&t=8173

 

And here is a link to my thread on the Starion... http://mitsu-media.com/showthread.php?t=7752

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Oh wow, that sapporo is fricken awesome man! I used to have a GSR turbo one, in black, with the IRS. Wish I'd never sold that car, but the current owner has it fully stripped for a rebuild, so it worked out for the best :).

 

Flatty Love :)

 

Right, back on topic!

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Put this info together for alp247, thought it'd be nice to have here too.

 

http://i750.photobucket.com/albums/xx141/ProZac83/Starion%20Project/P8060033_1024x768.jpg

 

http://i750.photobucket.com/albums/xx141/ProZac83/Starion%20Project/P8060032_1024x768.jpg

 

http://i750.photobucket.com/albums/xx141/ProZac83/Starion%20Project/P8060034_1024x768.jpg

 

Unfortunately the previous owner of this unit didn't like the japanese writing, so has (really roughly) painted over it :(. The one fitted to my car looks like:

http://i750.photobucket.com/albums/xx141/ProZac83/Starion%20Project/DSC01934.jpg

 

The fuel usage signal is taken from tapping into the number two injector wire, on the ECU (ground switching) side.

The speed signal is taken from a speedo sensor in the back of the instrument cluster. It should be possible to tap into a gearbox mounted speedo sensor, but I wouldnt know what sort of signal they output, so no idea if the signal would need multiplying or dividing. The rest is just a ground, a constant power, an 'acc' switched power, an 'on' switched power, and an illumination wire.

 

The loom from the control unit to the display is taped into the factory loom, but actually completely self-contained, doesn't have any extra wires running anywhere, so aslong as you mirror image the plugs, should work, see the picture for a clearer idea.

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  • 1 month later...

tons of great info you are posting zac!

 

Brad, were those leather seats factory on your 84? i have the same car but cloth seats. I wish i had your steering wheel! mine had one of those plastic wrap things on it and it ruined it.

 

Sorry these are old crappy pics. Im going to resurect the project soon so ill take more. I also dug out my manual but i havent had time to scan the velnas section yet.

 

http://i268.photobucket.com/albums/jj39/shift1313/Starion/P9030021.jpg

 

http://i268.photobucket.com/albums/jj39/shift1313/Starion/Nov2604.jpg

 

http://i268.photobucket.com/albums/jj39/shift1313/Starion/P6160039.jpg

 

PS, whenever you want to take a nap in your car just flip the etacs switch under the driver seat.

 

http://i268.photobucket.com/albums/jj39/shift1313/Starion/th_MitsuTheme4.jpg

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Wow Matt, those cloth seats are super clean! Yeah I know all about the ETACS switch, seems to turn the music on and off. I leave it on to annoy passengers, lol. Leather seats are factory in my car, I dont think I have ever seen an ES with cloth, I like it!
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Wow Matt, those cloth seats are super clean! Yeah I know all about the ETACS switch, seems to turn the music on and off. I leave it on to annoy passengers, lol. Leather seats are factory in my car, I dont think I have ever seen an ES with cloth, I like it!

 

yeah they are in decent shape. there is one tear where the metal frame for the "wing" bolster is. I think the seats are pretty fragile! Your leather seats look great in there! I finally fired my car up friday after sitting for awhile. I can't wait to dive back into it but right now im trying to find a house, have a baby on the way and need to finish out the race season(supermoto) so it will have to wait:) Plus i have a 68 camaro thats in about a million pieces...

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A '68 you say? I have one of those too, 100% original, unrestored.

http://farm4.staticflickr.com/3016/2854735660_1aa9e3a2b2_b.jpg

 

beautiful car brad! Mine isnt original at all. it was an SS clone at one ponit but it was a 327-powerglide base model to start with. Is that a manual telescoping antenna for FM radio? I havent seen one of those yet..

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