1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

slotting front engine mount? 13b swap

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Old 03-02-04, 07:58 AM
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slotting front engine mount? 13b swap

Hey guys I'll be swapping in a 85 se motor in my 83 GS this weekend. What part of the engine mount do I slot? The two holes on the side that bolts to the engine mounts or is it the holes up front that bolts onto the front cover? I know this is not the best method but kinda short on time and cash and I need this car on the road. Eventually I'll put an RB mount in there. By the way the front cover and oil pan from the se should be good to go right? or do I still need to swap the front cover?

Thanks, Ed
Old 03-02-04, 10:22 AM
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I haven't done this, but I did swap a 13b into my car using the 13b mount.

You have to slot the two holes on the side of the cross member. If you search around, you'll find specifics on slotting distance
Old 03-02-04, 10:52 AM
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I have put 13B engines in 12A chassis for many years but have not done this "slotting". I simply modify the 12A mount by extending it and then drill holes 20mm further back. You can optionally add an additional layer of reinforcement but it is not necessary.
Old 03-02-04, 04:30 PM
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Okay, I just pulled the engine brace from the 12a and mounted onto the se front cover can I just measure 20mm back and drill a new hole?

Thanks, Ed
Old 03-02-04, 04:42 PM
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should be fine doing that.
Old 03-02-04, 06:05 PM
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The geometry would be correct if you did that, assuming the mount is long enough. As you can see in the picture above, the new hole is very close to where the mount originally ended.
Old 03-02-04, 06:20 PM
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I just did this as well. The end of bracket will be the outer edge of you hole or slot. You should weld on some more material. I can get a picture if you need it.

-billy
Old 03-02-04, 07:21 PM
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Pics please! I want to make sure I do it right.

Thanks, Ed
Old 03-02-04, 07:24 PM
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go to junkyard and buy a gsl-se engine mount?
Old 03-02-04, 07:26 PM
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engine mount or brace(front cover)? I have one of those too.

Thanks, Ed
Old 03-02-04, 07:27 PM
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The se front cover brace that is.


Thanks, Ed
Old 03-02-04, 07:33 PM
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So you got what you need? GSL-SE front cover engine brace.

Like this?
http://racingbeat.com/resultset.asp?PartNumber=11832
Old 03-02-04, 07:43 PM
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Originally posted by 13BTOY
Pics please! I want to make sure I do it right.
I posted a pic if you scroll up and look you will see the original slot and the hole 20mm behind it The weld line is just behind the bolt hole. Do you need another camera angle? It is pretty simple just weld a piece of steel to each end and then drill. Note on the left side you need to grind down the corner. Other times I have also welded an additional reinforcement overlapping the weld line but that is not really necessary and the picture is more clear without it.
Old 03-02-04, 07:55 PM
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Hold on guys I'm confused. Drivefast so youre saying that the engine mount that RB sells is just an SE mount? And the SE mount will work w/out mofication. please clarify.

Thanks, Ed
Old 03-02-04, 07:59 PM
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Originally posted by DriveFast7
So you got what you need? GSL-SE front cover engine brace.

Like this?
http://racingbeat.com/resultset.asp?PartNumber=11832
Either pay $85 plus shipping to support a fine Rotary business, or make it yourself for (almost) free. Your $$ and your choice.

No the SE mount will not work without modification.

Last edited by cosmicbang; 03-02-04 at 08:03 PM.
Old 03-02-04, 08:37 PM
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Okay! I'm glad that was cleared up. Thanks!
Old 03-02-04, 11:11 PM
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Get the racing beat one, its well worth it. I'm just not comfortable with the idea of modding teh stock one.

Last edited by hornbm; 03-02-04 at 11:19 PM.
Old 03-03-04, 10:22 AM
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Originally posted by hornbm
Get the racing beat one, its well worth it. I'm just not comfortable with the idea of modding teh stock one.
I'm sure the RB mount works fine; I use a lot of their other products. Out of curiosity what is it specifically you are not comfortable with modifying the stock mount?
Old 03-03-04, 11:00 AM
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I dont have a welder. Thats the only thing holding me back and none of the muffler shops here dont like to fabricate things.

Thanks, Ed
Old 03-03-04, 11:15 AM
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I guess that's why RB is able to sell the things then. LOL. Good luck. Eventually you may need something else fabricated so if you find a place or someone that can do it, keep on good terms with them. Muffler shops probably not a good spot, maybe a machine shop, metal working, trailer repair, or racing shop. People who work in that industry will also often do favors for you on the side for a couple six packs etc.
Old 03-04-04, 05:36 PM
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13btoy, I paln on doing this swap also. Can you post a how to on what I need to do this?
Old 03-04-04, 06:00 PM
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Dude, just use everything from the SE with no modifications. The engine, the Front cover, and the crossmember.
Old 03-04-04, 06:05 PM
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Directfreak, Sorry to sound stupid but can you be more speacific?
Old 03-04-04, 06:32 PM
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Directfreak are you sure? Damn I have been getting different answers from different people? Some say it will not work including RB. Some say it will.

Thanks, Ed
Old 03-04-04, 07:58 PM
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1) Use the SE engine
2) Keep the SE front cover on the SE engine
3) Use the SE engine crossmember engine bracket

=>

You don't have to do jack **** to fit an 84/85 SE engine into another FB as long as you use the stock SE parts.


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