2.4 CIH Install into Opel GT
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Thread: 2.4 CIH Install into Opel GT

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    2.4 CIH Install into Opel GT

    Hello everyone!

    i am working on my 70 opel gt and i just bought a complete opel omega A 2.4
    What would be the best option to go.
    swap 2.4 engine and figure out what to use for fueling it.
    Or keep 2.4 bottom and install 1.9 or 2.0 head on it (with bigger valves?)
    I would like to keep the carburetor, or if not then go with megasquirt.
    So my question is what would you do if you have 1.9 2.4 and 2.0 engine and you want to make one engine?
    I will use some aftermarket cam to get some more hp out of the 2.4

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    Living in the past opelnut10's Avatar
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    2.4 engine swap in GT

    Quote Originally Posted by kummel View Post
    Hello everyone!

    i am working on my 70 opel gt and i just bought a complete opel omega A 2.4
    What would be the best option to go.
    swap 2.4 engine and figure out what to use for fueling it.
    Or keep 2.4 bottom and install 1.9 or 2.0 head on it (with bigger valves?)
    I would like to keep the carburetor, or if not then go with megasquirt.
    So my question is what would you do if you have 1.9 2.4 and 2.0 engine and you want to make one engine?
    I will use some aftermarket cam to get some more hp out of the 2.4
    If you want to keep the carb. then you have no choice but to use the 1.9 or 2.0 head. I would do a search for head modifaication on this forum (there is a lot of good information on the subject( RallyBob has done a lot of flow bench work on these heads) and room is limited in the GT engine compartment so a carb. in my opinion is the way to go with a Weber 38 being my weapon of choice

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    Modifications can be performed and adaptors can installed to align a 1.9L manifold to fit a 2.4 head.

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    Modifications & adaptors aligning a 1.9 manifold to a 2.4 head

    Quote Originally Posted by Anonymous D View Post
    Modifications can be performed and adaptors can installed to align a 1.9L manifold to fit a 2.4 head.
    Given a sledge hammer, cutting torch, lathe, milling machine and a tig welded YOU I am sure could get that job done. And if a bullfrog had pockets, he would carry a pistol to keep the snakes off his butt But I don't think the average owner has all of those tools at their disposal, and I'm sure the bullfrog will more than likely become a gormet meal for Mr. no-sholders.

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    Given a sledge hammer, cutting torch, lathe, milling machine and a tig welded YOU I am sure could get that job done.
    Some say a pin hole relocation and small metal weld will do the job.

    Others advocate consultation with a voodoo priest.

    It's your call.
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    7,000 Post Club wrench459 (R.I.P.)'s Avatar
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    I would keep the crank and block from the 2.4L.
    Add a 5.4 length rod along with custom 96.5mm pistons.

    Si vis pacem, para bellum "If you want peace, prepare for war"

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    Quote Originally Posted by opelnut10 View Post
    Given a sledge hammer, cutting torch, lathe, milling machine and a tig welded YOU I am sure could get that job done. And if a bullfrog had pockets, he would carry a pistol to keep the snakes off his butt But I don't think the average owner has all of those tools at their disposal, and I'm sure the bullfrog will more than likely become a gormet meal for Mr. no-sholders.
    I have a set of DSD manifolds that I purchased second hand a couple of months ago that are supposedly modified to fit both types of head. The only modification that seems to have been done is to make a second set of "cut outs" (not entirely sure what you would call them in English) for the bolts. I don't have access to a 2.2/2.4 head so I can't confirm that this modification works or not but if it does, and the person I bought them from claimed to have used them on a 2.2 head, it would seem that it's a very easy modification that most people would be able to do with some careful measurements, a drill and a Dremel ..... and some patience

    May be worth looking into
    "I hate RallyBob"


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    Quote Originally Posted by ggl View Post
    I have a set of DSD manifolds that I purchased second hand a couple of months ago that are supposedly modified to fit both types of head. The only modification that seems to have been done is to make a second set of "cut outs" (not entirely sure what you would call them in English) for the bolts. I don't have access to a 2.2/2.4 head so I can't confirm that this modification works or not but if it does, and the person I bought them from claimed to have used them on a 2.2 head, it would seem that it's a very easy modification that most people would be able to do with some careful measurements, a drill and a Dremel ..... and some patience

    May be worth looking into

    "cut outs" will do nicely
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    then it should be better idea to use 2.4 head and not to start rebuilding and installing bigger valves to 1.9 head.
    What about the exhaust manifold? to use 2.4 or original 1.9 manifold.

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    I think either way,1.9/2.0 intake,exhaust manifolds,especially head would choke down that nice engine.

    We have a member with Manta.Engine is 2.4,but the intake,exhaust and Ecu is from 2.0L Jetronic.That isn't the right way how to "upgrade" a car.Maybe bit more torque in low rews,that's about it.

    If You can't find 3.0intake manifold,search for sidedraft manifolds ebay.de.
    Go for programmable Ecuwon't have to moan for Dcoe fuel consumption.

    Do it right at first attempt.

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    1.9 intakes are used on 2.2 and 2.4 heads quite a bit...with really only drilling for the smaller alignment pins in a different location. I personally don't like the added height of the Carb. Different intakes are taller..so choose wisely.
    Last edited by tekenaar; 09-25-2012 at 07:09 PM.
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    Kummel, why not just use the 2.4 head. You can put a 1.9 exhaust and intake manifold on it with little modification, then get a Weber DGAS 38. More than enough umph to get you car going. Keep it simple, you will never be sorry.

    Bob
    71 Chrome Yellow GT

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    thank you for all the good advice.
    Next question would be what cam to use, before i have used Enem x10 for 2.4 setup, but that was with megasquirt and 6sil cut manifold. With opel rekord C body i got 7.9sek to 62mph.
    i need it to be torque not for high rpm. Next plans would be to find a 5 speed gearbox and figure out something with the rear axle, because already i have a lot of wheel spin.
    And i plan to use the car in the winter rally here so i need 2wd and strong rear axle.
    My idea was to try volvo 2 series axle and some fwd wheels.
    Any one has tried to install Opel omega small LSD to opel GT? i did it for rekord C rear axle but that was bigger than GT if i remember correctly.
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    -25c in a opel gt is a good experience

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    Just Some Dude in Jersey The Scifi Guy's Avatar
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    Thank you, thank you, for posting a pic of a GT driving and sliding in the snow!

    I used to go out and do that everytime it snowed. I don't think I've ever seen a pic like that here before.

    RallyBob likes this.

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    couple of more
    Attached Images Attached Images
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    thats my main thing to be in the winter rally it is usually at the end of vebruary so it is cold and is about 300-400km and lasts about 10-12h. because gt is so light and low on traction i need some ideas how to get some more traction.

  20. #18
    Just Some Dude in Jersey The Scifi Guy's Avatar
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    Thank you, that was wonderful! Many happy memories!

    About 17 years ago, we got 100cm of snow one day. My GT was the only car that could drive on that much fresh snow because it was so light and had wide tires it would not sink into the snow. For two days I drove to the food store to get supplies for my neighbors because their cars were too heavy to go through soft snow.

    So, how about very, very, wide tires for you?

    Or those tires with the spikes that Russian motorcycle ice racers use?

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    Quote Originally Posted by kummel View Post
    couple of more
    Holy Cow Batman! I didn't know Germany made snowmobiles!
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    Very stunning pictures.

    Quote Originally Posted by thescifiguy View Post
    So, how about very, very, wide tires for you?
    Or those tires with the spikes that Russian motorcycle ice racers use?
    I would suggest to use with narrow tyres(better driveability) with spikes(better traction) in them.
    This is a cheap way:



    Haven't tried them myself.But this is one of the winter seasons goals-find a lake.Perfect for these tyres.

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