Chuff's MK1 Escort

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Chuff
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Re: Chuff's MK1 Escort

Post by Chuff »

Holden202T wrote:yep i reckon it does purely because it was written on the box .... but if you want to confirm it, just pull the screws out one end of the box and slide the board out and post i a pic .... the top add on VR board actually says its a VR interface board on it.
And that's just what I did after my last post.
IMG_20201215_165527.jpg
At least I know that I still have 2 options for the CAS.

Thanks for your input Holden202T. Much appreciated.

Chuff
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Re: Chuff's MK1 Escort

Post by Holden202T »

:thumbup:
Chuff
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Re: Chuff's MK1 Escort

Post by Chuff »

Well progress has stopped on this project for the last 18 months. Life, COVID, lock-downs & half way through moving house pretty much saw to that.

Still busy with a few things but am able to find time here and there to do some tasks required to get this project back on track.

Right now I'm trying to figure out the fuel system. My Escort has the fuel tank installed in the factory location which is inside the boot on the right hand side with the fuel exiting out the base below the car behind the wheel well. I won't be running a swirl pot as the Escort side tanks do not require one due to having the outlet at the very base of the tank. I don't want to run any fuel lines in the boot or the cabin. I want to run the fuel lines in the original location of the nylon factory fuel lines so the fuel pump, damper and filter need to be located underneath the car and there isn't much room to install them and have them tucked out of the way.

I've dummy fitted the pump & damper as can been seen in the attached photos and would like some input into whether or not the locations I've selected are OK. They are located on the inside of the chassis rail but sit below the rail beside the RHS rear wheel. I'm not overly wrapped with the locations I have selected but I don't have too many other options.

The photos below hopefully give an indication of how it all looks & I would like some input as to whether or not the chosen locations will be a problem, both legally & practically.

Also, what impact would I get if I lefter the damper out of the system?

Thanks.

Chuff
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Re: Chuff's MK1 Escort

Post by antus »

Its a bit hard to see in the pics without knowing the under side of the mk1 but its a little bit too close to the tyre for my liking. Last thing you need is a blow out cutting through fuel hose and creating sparks from tyre metal on road or chassis in that location. can you run an in tank pump and move the rest of it to the engine bay? Otherwise maybe some metal over it as armour?

Does the tank have provision for a return line? For an efi conversion in a mates car that only had 1 fuel line he took the factory hard line to a shop and got them to make up two then ran them side by side in the factory location.
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Chuff
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Re: Chuff's MK1 Escort

Post by Chuff »

I have the same concerns about it being too close to the tyre in case of a blowout or other debris being flung up. There's no chance of running an in tank pump without completely redesigning the tank. I considered running a swirl pot in the engine bay with the pump, damper & filter and feeding the fuel into it using a fawcet pump but it's pretty crowded up the front as well so that's a no go.

Leaving it in the back where it is at the moment and covering the assembly with some metal to armour it is what I'm leaning towards.

The tank has no provision for a return line. I will be brazing a fitting into the top of it.
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Chuff
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Re: Chuff's MK1 Escort

Post by Chuff »

While Googling to try and figure out an elegant solution for the placement of the pump, filter & damper, I've read that the damper can also be placed in the return line.

Using the OEM damper as found on early GMH EFI cars as shown below is there any problem with placing the damper in the return line? Will it work OK? Are there any pros/cons in placing the damper in the feed or return lines?
Damper.jpg
Damper.jpg (98.42 KiB) Viewed 3610 times
Also, the bolt located in the top of the damper. Is this an adjustment bolt to allow tuning the damper so as to eliminate the pulses?

Thanks.

Chuff
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Re: Chuff's MK1 Escort

Post by Charlescrown »

I have removed them and found no difference at all. I do remember the VK had 2. One on the supply and for who knows why one on the return.
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Re: Chuff's MK1 Escort

Post by Holden202T »

yeah ive never used them!
Chuff
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Re: Chuff's MK1 Escort

Post by Chuff »

Thanks for the replies guys.

I've been reading up on the damper and some say keep it, others say ditch it. I've read that without a damper low pulse widths at the injectors, as in during idle, can cause erratic behaviours so I'm not sure whether to keep it or not, and as this is all a completely new setup being retrofitted to my Escort, I don't have a base line to determine whether or not any idle problems that may pop up once it's all going can be attribute to the lack of the damper or not.

I'm probably overthinking this but I'm happy to plan a hundred times so long as I execute once only. Nothing worse than spending time & money doing the job only to realise afterwards that I had forgotten to take something into account.

May all be mute anyway. I've been dummy positioning the pump, damper & filter all over the back of the car and have accepted that the only way I can make them fit in the tight confines I have, with or without the damper, will require me to ditch the standard Bosch VL Commodore pump which needs to be fed directly in line with the pump and purchase a Bosch 044 which will allow me to provide the feed to the pump at right angles, thereby allowing it all to fit.

The puzzle continues.

Thanks again guys.

Chuff
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Re: Chuff's MK1 Escort

Post by vlad01 »

My understanding is a damper will help keep the fuel delivery at the nozzle stable across the range of PW and frequency as having no damper it is possible to get weird resonance in fuel pressure pulses and the timing of opening/closing of the injectors which can result in certain PW/frequencies under delivering and some over delivering.

You should be able to tune that out but the VE table might be more spiky than it otherwise would be to get a good AFR control.
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