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Thread: Historic Touring Racing Mk2 Escort

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    Bodger wxneypar's Avatar

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    Historic Touring Racing Mk2 Escort

    Hi everyone, we talked about it in the power plots section, but I want to have a thread here so we can talk a little about everything

    This is my race car:
    The car is a 1978 1600 Sport Escort, used just for racing in the National Historic Touring Car championship currently.
    It's within FIA security regulations and the championship regulations which are a lot, but to sum up, power to weight ratio limited at 7.5kg per HP (eg: a 750kg car can't have more than 100HP)



    The engine:
    - 1600 Xflow
    - 10.5:1 CR
    - Pistons are VW 1.8 8v ones (It's hard to get good original pistons here in Uruguay so this is a common mod here. Photo attached)
    - Lightened flywheel
    - 42mm/34mm valves on a nicely ported head
    - Iskenderian cam (.387 valve lift, 290deg advertised duration on a 108 lobe center, .024" valve lash for int and exh. 3500-7500 RPM band)
    - Custom made Electronic ignition distributor
    - 40DCOE32 Carbs on 55 idles, 30 pumps, 135 mains, 180 air correctors and F11 emulsion tubes.





    Hope you enjoy the post. Any ideas or suggestions for the car or engine are always welcome.
    Thanks!

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    Re: Historic Touring Racing Mk2 Escort

    So to begin with the discussion, I'm in the process of making some coilovers for the front suspension. Currently is on custom spring on original struts.
    I need to get the Springs from the UK, so I was wondering if you have any suggestions on brands, rate and length for a circuit car.
    I was thinking around 500 lb, and I'm not sure how to calculate the length I need.
    I saw Burton has a lot of options, are those good quality?

    Thanks!
    Peter

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    Re: Historic Touring Racing Mk2 Escort

    what sort of tyres do you use? normal road tyres, sticky track tyres like toyo 888, yoko 008r, or slicks. there are race escorts using 500lb front springs, but that is very stiff for an x/flow powered escort

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    Re: Historic Touring Racing Mk2 Escort

    We all have to use the same tyres as part of the championship rules. Those are Jinyu YH11 185 60 13 road tyres.
    The 500lbs was just a guess, do you think it is too much? What do you suggest?
    I have custom made springs now which are way stiffer than standard but don't really know how much. It certainly corners better than standard rate obviously.

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    Re: Historic Touring Racing Mk2 Escort

    with springs the more grip you generate the more body roll you get the stiffer the spring can go.

    your tyres are regular road tyres and fairly narrow at that so 500lb will be far too stiff, so maybe 250lb even that may be a bit too stiff, most fast road x/flow powered escorts used 145-175lb

    you can get race spring from many sources, the length you need will be dictated by your struts and ride height, about 10 inch long will probably work, you could try measuring to see what you need by putting the front suspension together WITHOUT any springs and jacking the body to the correct ride height and measuring from spring platform to top mount

    https://www.demon-tweeks.com/uk/moto...sion-steering/
    Last edited by Graham; 13-09-2018 at 18:52.

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    Re: Historic Touring Racing Mk2 Escort

    That's a great method to measure length, thanks.
    Let's say I use your method and measure 10 inches, I buy 10 inches springs, but when fitted and the car is not on the jack, the ride height would go lower as the engine weight is over them.
    Do you know (aproximately of course) how much would the springs collapse once the car is on the floor?

    2nd question: Burton springs are 21.12, Faulkners are 26 an eibachs are 75. Are those THAT better? I can pay the difference if it is worthy, but want to know if it is.

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    Re: Historic Touring Racing Mk2 Escort

    burton springs could be anything, nothing wrong with faulkners id buy them ( i have many times)

    with a 250lb spring the suspension wont drop much with the weight of the car on it inch maybe two, so if you measure with the coilover collar in the middle of the height adjustment you should be able to get it where you want it

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    Re: Historic Touring Racing Mk2 Escort

    Quote Originally Posted by Graham View Post
    burton springs could be anything, nothing wrong with faulkners id buy them ( i have many times)

    with a 250lb spring the suspension wont drop much with the weight of the car on it inch maybe two, so if you measure with the coilover collar in the middle of the height adjustment you should be able to get it where you want it
    That is great information! Thank you.
    I already ordered the Adjustable spring seat kit, I'll start the measurements when I get it fitted then.
    Have a good day
    Peter

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    Re: Historic Touring Racing Mk2 Escort

    Some photos of the last race 2 weeks ago:
    The water pump belt failed (or decided to get off the engine) and I had to retire.



    This is the latest power plot before the race. Blue lines are the newest, the yellow one was the one from the previous race.



    I still have to carry a lot of weight because of the power (Remember the regulation of 7.5 kg per HP)
    If I can flatten the power curve at the top where it gets to around 125 I can unload 75kg, which is would be great cause it is really affecting the car's cornering and braking behavior.
    I'm thinking about limiting the current advance curve, do you think it is possible to achieve it like that?
    I really don't have much time to work on any other heavy change in the engine between races.

    Thanks!
    Peter

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