OPEL

1974 A Series Opel Manta Blog

The Opel Project blog has been setup to record the rebuild of my 1974 A Series Opel Manta.
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1974 A Series Opel Manta Blog
OPEL

1974 A Series Opel MantaFeatured

September 30, 2017

My 1974 A Series Opel Manta. It’s been a long project and there are still a few little modifications I want to do in the future,. Now running a 2.0l+ CIH engine on full OMEX 600 engine management with Webcon throttle bodies. Everything is custom-made or adapted, from the full 2.5″ stainless steel exhaust, Wilwood racing callipers, Cosworth rear callipers, Hydraulic clutch, Chevy S10 clutch kit and lots more.. Read on for full details of the rebuild and hopefully one-day pictures of her out on the road in Germany!

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Suspension

A little suspension refresh!

June 17, 2025

Ages ago a bought some new rear Koni sport adjustables and fitted these but i could not get the front ones at the time, but a couple of months ago i found the fronts at a good price and finally got around to fitting them. I have left them set very on the lowest setting for the moment to see how they are and i can then adjust to be harder if needed.  

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Fuel tank, OPEL

Testing the new Opel Manta A Series fuel sender

May 27, 2025

It was time to test out the new fuel sender! After wiring it in and fitting a new earth strap, just to make sure it was time to fill the tank up and see what happened! I was not disappointed as with 5 litres of fuel in the tank the gauge was reading just inside the red. Which thought was pretty good as the old one was right into the white the other side of the red and when i emptied out the tank, there was at least 15 litres if not more, fuel in there so now i know…

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Fuel tank

Opel Manta A Series Fuel Sender Replacement

May 27, 2025

One thing on my list of jobs i wanted to do at some point was replace the fuel sender as mine has never seemed to be that accurate and im sure it was reading lower than the actual level. Also where i had swapped to the fuel injection i needed to block up the fuel outlet on the sender as that is all part of the fuel pump for the injection. Firstly, where do you find a new A Series fuel sender and even harder one that is setup for injection with no fuel outlet! Well, i never seemed to…

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Fuel tank

Fuel Pump Upgrade

May 13, 2025

When i started the proper restoration and upgrade of the A Series, there were not too many options for aftermarket in-tank pumps for the full fuel injection and as I didn’t want to go the whole swirl pot in the boot option, I opted for an all-in-one pump and swirl pot from a Punto, which worked great but was made for a much deeper tanks than the A Series and was quite a bulky plastic unit and as the pump was too tall I ended up having a flange welded to the tank and cutting a hole in the boot…

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Electrical

Sharp RG – 7050E radio

March 1, 2025

A couple of months ago as i was having a little search on eBay, I came across someone selling a Sharp RG – 7050E radio. This was the exact radio that was fitted to the car when I bought it 🙂 and that one had sadly seen better days. The seller said it was in mint condition and he was selling it because the cassette was stuck in it and he could get it out, which is what happened to the one I had, so obviously a common thing when they get old. I knew how to get the cassette…

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Autumn Adventuring in the Opel

October 9, 2024

Since the VBO meeting, i haven’t had time to use the Opel much. Just a couple of runs out to Compton Abbas Airfield to see the Spitfires. This week is the last week that they will be there so if the weather is dry and sunny tomorrow I will be taking a little trip out to see them. Then I think its time to tackle a couple of jobs that I have had on my list for a while.    

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Travel

VBO Meeting Sywell 2024

July 28, 2024

This weekend it was the VBO meeting at Sywell Aerodrome. So it was time for a trip up in the Opel as I missed last years. The Opel was fully put to its test on the way up due to an accident and road closure at Newbury and the usual great handling of the UK police! After a bit of a diversion down lots of back roads I finally made it to Leicester for a stop over! This time the alternator charged fully and I can definitely say that the Evans waterless coolant does it job as not only was…

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