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Johnnys MK1 Cortina resto project


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Those cherry bomb style silencers are not much good, only drop the sound by approx 10db. Works on my anglebox, gets me just under the limits for track days @ 105db

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22 minutes ago, colr6 said:

Those cherry bomb style silencers are not much good, only drop the sound by approx 10db. Works on my anglebox, gets me just under the limits for track days @ 105db

The exhaust with one straight through box was fine with the crossflow.

But noisy with the Mazda.

That's it now, noisy it is.

I don't think it helps with a 2.5 inch exhaust from the manifold back.

I'm hopeful not a shake down road test tomorrow , so I'll see if I can put up with it😁

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Shakedown testing all done.

It drives great, goes well, I don't know how it compares to a duratec.

Carbs run the car well, only a bit weak off idle, but certainly ok till it's dynoed.

Gearbox is very good and tight.

Axle is a helical 3.9 and is a good match for the gearbox.

Suspension choice was good, flat in the corners, but not a bone shaker.

All in all I'm very pleased.

Too noisy , but it's a screamer.

I had to replace the alternator this morning, because they packed up 🙄

Cooling is good.

Seats are comfortable and just the right hight.

And all that sound proofing is very noticeable.

Just got to sort out the fuel gauge.

 

IMG_20200713_161913.jpg

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2 minutes ago, colr6 said:

It’s always good when a plan comes together. Top job now enjoy 👍

Its done now, I'm bored 🤪

Just need to find other OSF types to meet up with 😜😷

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2 minutes ago, DaveF72 said:

Cracking job done there Johnny Looks a beauty !!

Thanks, I've been driving it about local for a couple of days, to sort any teething troubles, and it's been good, but I do need to get the engine set up on a Dyno, I just had a educated guess at what jets it would need to run, and it's a bit weak off idle.

So that's the next job really 🤔

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37 minutes ago, Huge said:

Keep us updated proper interested in the Dyno result 👍 

Yes got to organise that soon. I m back at work unfurloughed next week, so will try and sort it out.

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As I've done a few miles now, and all the suspension has settled in, I have rechecked the tracking and camber that i set before.

the car was on the road.

One side the camber was not exactly the same as the other, so i reset that, rechecked and adjusted the tracking.  

I had initially set the camber to 1.5 deg neg, and the tracking to 0 deg. when I rechecked it after settling in , the tracking was toeing out a bit.

I did experience a very small amount of bump steer. I reset the camber to 1.25 deg and the tracking to 1 mm in.

This seems a good set up, as the bump steer has gone.

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  • 2 weeks later...

I've just ordered up a tacho conversation board from spiyda, to alow my MK2 Cortina tacho to work in my MK1 Cortina with the nodiz ign module.

Has any one done on here ?

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  • 3 weeks later...
On 14/07/2020 at 17:15, Huge said:

Keep us updated proper interested in the Dyno result 👍 

 

Dyno session booked for 2 weeks time. I'll try to get some video and pictures.

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I'm expecting it to be about 150 BHP.

Have to wait and see what it's capable of.

I'm running 40 dcoe carbs, that's borderline on a 1840 cc engine, but as it's a road car , torque is important, and the 40 will be better than the 45 .

And I already had the 40 carbs 😁

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Realistically, It had 130 when new, with the injection and a conservative ign advance, and a cat and restrictive exhaust.

It now has a 2.5 inch non restrictive exhaust, a 4 into 1 exhaust manifold, a very good inlet manifold, port matched, and cleaned up runners in the head, 3D mappable ign, and adjustable fueling.

So i'm expecting 140, but hoping 150 + with raising the rev limiter to around 8000rpm

Well will see..................................

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  • 4 weeks later...

It made 136bhp on the first run as is, which I was pleased with , as that was with my jetting and my ignition  map guessing.

With jetting changes, and me programming the igition map, it made 139 bhp.

The 40 Weber's made the power fall off at 7200 rpm, so there was nothing to gain from increasing the ceiling.

Unfortunately I ficked up ign mapping .

I didn't realise I was in a 3d map , as I was adjusting the map.

The results of which meant that at full load the ignition timing was a some points 14 degrees retarded.

I didn't notice this until I was at home that evening, and going though what had gone on , in my head.

Also , I've put longer ram pipes on .

I also have had problems with the crank sensor loosing it's signal.

I am re engineering  the trigger wheel fixings.

Also the trigger wheel was Lazer cut , and had a rough edge to the teeth, this needs a lathe , which I don't have.

So I have to do another Dyno run at a later date when all is sorted 🙁

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I get your disappointment 😕 but on the positive side look what you’ve learned! Anyway if it was perfect you’d have nothing to do? 🤷‍♂️😁 as always keep us updated 👍

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