Putting a S2 engine in a S1 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 04-19-2010, 08:18 AM   #1
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Default Putting a S2 engine in a S1

I have a 93 bonneville with the engine gone, is it possible to swap in a series 2 engine, and if so what is involved. lost my engine last night, and I do have a another series 1 to go in but i knows for a full car with a series 2 for 60$

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Old 04-19-2010, 10:39 AM   #2
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Interesting you mention this, I was chatting with a buddy yesterday about his 94. He has a full S2 dropout.

You'd need the wiring harness for an S2 Bonneville, the pcm (mounted in engine bay) and the engine/trans/axles. It'* possible
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Old 04-19-2010, 11:15 AM   #3
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Originally Posted by BillBoost37 View Post
Interesting you mention this, I was chatting with a buddy yesterday about his 94. He has a full S2 dropout.

You'd need the wiring harness for an S2 Bonneville, the pcm (mounted in engine bay) and the engine/trans/axles. It'* possible
And quite common. Its a very good modification to make, and brings a world of aftermarket with it. The w-body guys have been doing it for a long time. Your absolute easiest bet would be to get a donor car that had been wrecked or something of that sort. A late 90'* Bonneville with heavy rear end or side damage for example, and that way you can pull everything off of the car that you would need.
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Old 04-19-2010, 12:16 PM   #4
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In my local buddies case, he has a wrecked Regal. I told him we'd just need a wiring harness and the right mounts. It should be pretty easy in something like a Bonneville.
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Old 04-19-2010, 03:05 PM   #5
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I can get the full car for 60$, the engine cradle is rusted out thats all thats rong.

so I would have to take the transaxle, cv-shafts, mounts, wireing, so pretty much the full engine compartment, I can do that, but what is involved in the wireing inside the car, any extensive modifications that got to be done?

I do have access to a fully fited out garage seeing my father is a mechanic and owns his own business, the the only thing i'm worried about is if we gets stuck on something would there be anyone that would know how to overcome it, and would it cost money. and I kinda don't have much money myself to spend of heavy modifacations to make this work so if its just drop it all in and go thats good for me.

See I got another bonneville already with a good series 1 engine but i would rather to make the series 2 fit, like you said more aftermarket stuff, more power, and i can get a supercharger easyer for itlater on.
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Old 04-19-2010, 03:12 PM   #6
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Being that all most of the important stuff is at the pcm in the engine bay, there'* very little coming through the firewall. To be 100% sure of what it would take, I'd need the 93 FSM. Or I could send you the info I do have already in Excel. It'* the firewall connector mapping for 95-99
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Old 04-19-2010, 03:43 PM   #7
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Depending how far you wanted to get into it, you could also swap out the dash harness, but that is involved.

I'd get the other car for $60 just for some spare parts if needed. Could easily make that back selling a couple items.
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Old 05-18-2010, 10:49 PM   #8
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well i got a car, never got the other one cuz it wasent supercharged, I payed 500$ for it because the guy smashed the front in when he drove into a ditch. So I'm in the process of swapping out the series 1 engine in my 93 bonneville se, to a Series 2 supercharged from the 96 bonneville ssei, I'm taking the "engine, Tranny, full car wiring, all required sensors, and the full interior, Because its leather, has heads up display, the seats are crazy, nothings broke, and it had a auto dim mirror, and the hole wiring can come with it" I knows its alot of work but I can do it.

so Is there going to be any major problems I'm going to run into durring the install in my 93?
Also what should I do/check wile i'm doing all this?

also I'm swapping the air ride, rims and trunk lid

Thanks

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