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New Opel Manta Project (Hopefully)


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On 8/26/2016 at 17:03, h0tr0dder_uk said:

Progress report

 

Finally got my newly designed engine mounts made

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Should leave a lot more room for headers, steering linkage etc.  I also have the steering rack mocked up so will remove the whole subframe and finish the welding next.

 

 

 

 

i suggest welding a triangle bracket underneath the round tube for the engine mountings, i did like yours first time when i ran the CIH 6 and they cracked the welds.

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Project images are available to Club Members Only, Click to become an OMOC Member. http://i41.photobucket.com/albums/e273/h0tr0dder_uk/38k%20Opel%20Manta/engine1.jpg Engine finally in (mock

Here it is - 1974 Opel Manta.  All original, rust free Texas car with only 38000 miles.       Its alost too good to modify....Almost First modification has to be switching those ugly bumpers

Its about time I did an update.    I've been on and off this project for a while now.  Crazy hot summers (100f) out here keep me out of the garage, but covid has helped me crack on with it

  • 4 weeks later...

my first attempt at building headers failed miserably.  a combination of poor gaps (cutting the correct angle in tubing is a pain), welding the backside of the headers with them off the engine and too much heat from the welder ended in too much distortion.  so i gave up and ignored the car for a week until i was in a better mood.

 

then i went and bought one of these cool tools - a tubing notcher.  cost $48 from harbor freight (worth every penny)

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makes joints like this -can be used for roll cages too ;)

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then i built a heavy duty jig so the headers can be fully welded whilst clamped in the right place

Project images are available to Club Members Only, Click to become an OMOC Member.

 

hopefully ill get to finish up the first side over xmas

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  • 3 years later...

Its about time I did an update. 

 

I've been on and off this project for a while now.  Crazy hot summers (100f) out here keep me out of the garage, but covid has helped me crack on with it :D

In order to fit the huge intercooler I had to remove the original spoiler and a large section of the front panel.  I came up with this spoiler to try and regain some of the original design.

https://drive.google.com/file/d/1asKWZy9z7hamV3YkjLEcAAde6uy2qhbC/view?usp=sharing

 

Then I spent months wiring all of the new Haltech electronics to the engine (ECU, 2 x Ignition controllers, Wide Band Controller). 

https://drive.google.com/file/d/129Lec_MqZSvHvb2FgYhTWYaHwP3hydLx/view?usp=sharing

 

Also had to order some custom oil cooler line fittings etc etc.

https://drive.google.com/file/d/1biU5Ufd6DYGtqa_1rHhxw_ew3eWtVa6M/view?usp=sharing

https://drive.google.com/file/d/14DJNSaam7QIUnvGjvMadYWDE1KaQ6Th3/view?usp=sharing

 

Finally today I was able to start it up for the first time :)

https://youtu.be/Mp08nHv_CvA

The engine was running pretty rich.  Since this video I've adjusted the injector sizing and its a lot better.

 

Next job is to order a transmission controller and wire that in.  Once that's done it can all go back in the car.

 

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2 hours ago, h0tr0dder_uk said:

Its about time I did an update. 

 

I've been on and off this project for a while now.  Crazy hot summers (100f) out here keep me out of the garage, but covid has helped me crack on with it :D

In order to fit the huge intercooler I had to remove the original spoiler and a large section of the front panel.  I came up with this spoiler to try and regain some of the original design.

https://drive.google.com/file/d/1asKWZy9z7hamV3YkjLEcAAde6uy2qhbC/view?usp=sharing

 

Then I spent months wiring all of the new Haltech electronics to the engine (ECU, 2 x Ignition controllers, Wide Band Controller). 

https://drive.google.com/file/d/129Lec_MqZSvHvb2FgYhTWYaHwP3hydLx/view?usp=sharing

 

Also had to order some custom oil cooler line fittings etc etc.

https://drive.google.com/file/d/1biU5Ufd6DYGtqa_1rHhxw_ew3eWtVa6M/view?usp=sharing

https://drive.google.com/file/d/14DJNSaam7QIUnvGjvMadYWDE1KaQ6Th3/view?usp=sharing

 

Finally today I was able to start it up for the first time :)

https://youtu.be/Mp08nHv_CvA

The engine was running pretty rich.  Since this video I've adjusted the injector sizing and its a lot better.

 

Next job is to order a transmission controller and wire that in.  Once that's done it can all go back in the car.

 

Excellent project 👍, been thinking about a 1uz conversion for my AsconaA.If you can get this in this, then I should have an easy time with the Lexus lump 😁 Is the rack all finished? Would not mind a few picks how you got it lower of finished setup if possible as I think I will need to reform the top of the subframe (make it thin) and lower the steering rack too.

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This is going to be as awesome as your previous A series. Loving the engine work and getting it going 😀

I presume the power output of that engine will be more than stock now that you have a custom ecu setup. It's not shabby power in standard form though 😆

Edited by czwh42
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7 hours ago, czwh42 said:

This is going to be as awesome as your previous A series. Loving the engine work and getting it going 😀

I presume the power output of that engine will be more than stock now that you have a custom ecu setup. It's not shabby power in standard form though 😆

Not at all. The chasis of the S63s Class struggled with the power, I could very rarely drive it anger although I tried multiple times and upset a lot of VAG owners 😁

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12 hours ago, czwh42 said:

This is going to be as awesome as your previous A series. Loving the engine work and getting it going 😀

I presume the power output of that engine will be more than stock now that you have a custom ecu setup. It's not shabby power in standard form though 😆

I think is 493bhp stock.

My engine will have a smaller supercharger pulley to overdrive it, a larger intercooler, free flowing headers and exhaust and no smog equipment.  I'm thinking around 550bhp.

 

16 hours ago, Jessopia74 said:

Excellent project 👍, been thinking about a 1uz conversion for my AsconaA.If you can get this in this, then I should have an easy time with the Lexus lump 😁 Is the rack all finished? Would not mind a few picks how you got it lower of finished setup if possible as I think I will need to reform the top of the subframe (make it thin) and lower the steering rack too.

Yeah - the manta rack sits about 1 - 1.5" higher than the cross member.  If you need to lower the rack you have to notch the cross member and make new mounts.  Then you have to work out the new pivot point intersection and get a rack that is narrow enough.  Otherwise you'll get bump steer.  I'll post a pic of the geometry when I get a chance.

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  • 4 weeks later...
On 05/09/2020 at 04:02, h0tr0dder_uk said:

Yup, read something similar previous. Don't be shy with pics though too please 🍻

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