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Post by Marc on Mar 25, 2009 17:55:21 GMT -6
Pics & time slips ASAP!
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Post by jmulder79 on Mar 27, 2009 19:45:08 GMT -6
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Post by sall on Mar 27, 2009 20:12:51 GMT -6
Nice. I now believe it! Now, put the Aurora engine cover back on (if it fits)and stop showing off that caddy symbol!  |
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Post by Marc on Mar 27, 2009 20:56:37 GMT -6
OK. Now on to the next step: How does it run? Will you be taking it to the nearest track to find out?
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Post by jmulder79 on Mar 28, 2009 8:28:33 GMT -6
Nice. I now believe it! Now, put the Aurora engine cover back on (if it fits)and stop showing off that caddy symbol! I actually think the Cadillac cover looks pretty cool. The Aurora cover does fit, so I can always change it back if I want. |
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Post by jmulder79 on Mar 28, 2009 8:59:04 GMT -6
OK. Now on to the next step: How does it run? Will you be taking it to the nearest track to find out? To be honest... not that different. It's super smooth and quiet when idling, just like before. Although the exhaust tone does have a little more "grunt" to it when I step on it. In my opinion, the only noticeable difference while accelerating is after you reach around 30mph; between 30 and 80 it feels like you're being sucked into the seat. I'm still going to do some investigating to make sure nothing was screwed up, because I actually think my Aurora had more "snap" off the line with it's original 4.0 engine. It feels the same way my Aurora did before I fixed the "Power/Normal" wiring underneath the shifter. Maybe I'll look there first. |
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Post by jmulder79 on Mar 28, 2009 9:02:10 GMT -6
OK. Now on to the next step: How does it run? Will you be taking it to the nearest track to find out? I've honestly never been to the track with any of my vehicles. I'm not even sure where the nearest one is. So I don't plan on taking the Aurora out there. Besides, this is "the family car" for my wife and I, and our two sons. I guess I'm fine just having the novelty of a 4.6 under the hood. |
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Post by tpis15 on Mar 28, 2009 14:25:26 GMT -6
I think the devile transaxles all had a final drive ratio of 3.11 or 3.48. Your original autobahn transaxle would be 3.71. This could explain your lack of off the line "snap".
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Post by Marc on Mar 28, 2009 14:36:04 GMT -6
3.11 with the 275 HP 4.6, 3.71 with the 300 HP 4.6.
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Post by Marc on Mar 30, 2009 15:02:28 GMT -6
Is the radiator for the 4.0 adequate for the 4.6?
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Post by rvrrat on Mar 30, 2009 15:14:08 GMT -6
I SO Want that Engine!!!! lol
A friend of mine might inherit his grandfathers Deville for parts and has thought about giving me the engine.. If my 4.0 should ever die.
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Post by jmulder79 on Mar 30, 2009 16:09:32 GMT -6
3.11 with the 275 HP 4.6, 3.71 with the 300 HP 4.6. This is correct. I actually bought the engine & transmission under the assumption that all DeVilles from that year were the same. Since I thought I was getting a 275hp 4.6, my plan was to use my Aurora's original torque converter and differential. However, Steve at the shop noticed the VIN indicated the 300hp engine. It was only then that I found out that the DeVille Councours actually had the 300hp with 3.71 gear ratio. So the good news was that it ended up being less costly due to less labor, but I didn't get the low-end torque I was planning on. |
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Post by jmulder79 on Mar 30, 2009 16:32:40 GMT -6
Is the radiator for the 4.0 adequate for the 4.6? I actually had my radiator replaced during the swap. So far, so good. Although it did creep up to about 220 while idling in the parking lot last week. I was about to turn it off, but the temperature guage stayed right there. Once we were moving again it was down to 200 relatively quickly. No problems while driving whatsoever. |
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XJSman89
Administrator 
Posts: 6,309
Staff Member
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Post by XJSman89 on Mar 30, 2009 16:57:42 GMT -6
Nice, man! Until now it was hard to believe that anyone had gotten this done. When my 4.0 dies (in the next few years max. according to my mechanic) I would like to slide in a 4.6... It's nice to know that it can be done!
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Post by Deleted on Mar 30, 2009 17:09:24 GMT -6
when you decide to sell this family car....let me know!! okay??
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Post by jmulder79 on Apr 2, 2009 14:28:34 GMT -6
when you decide to sell this family car....let me know!! okay?? Sell my Aurora? Not likely. ;D |
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Post by 95oldsaurora on Apr 27, 2009 19:07:07 GMT -6
definately needed to read this mine mite be going threw the same process soon cept i will be keeping my brand new 3.71 tranny
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plato442
Aurora Driver
Life, Liberty, and the pursuit of Oldsmobile...
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Post by plato442 on May 28, 2012 5:35:22 GMT -6
any updates on the car and engine? Still running smooth?
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Post by jmulder79 on Jun 5, 2012 11:35:26 GMT -6
Running fine now...
But I should mention that about six months after I had the 4.6 put in, the headgaskets went. I had the timeserts done when the headgaskets were replaced, and then I spun a bearing shortly after that. I ended up finding another 4.6 with comparable mileage and had the head gaskets done right away with the timeserts. I wanted to go with the stud kit, but I couldn't get a mechanic in my area to go for it. I think the Aurora has spent more time on the hoist than on the road over the past couple years.
But, like I said, it's running fine now. I'm keeping my fingers crossed and checking my oil and coolant levels twice a week. I wanna keep this thing running good for at least a few more years. I'm still under 140k on the odometer, so I should be able to get a whole lot more use out of the Aurora.
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NinEFivEFourOH
Aurora Passenger
How about me and you, in the back of my Oldsmobile...
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Post by NinEFivEFourOH on Jun 5, 2012 20:51:15 GMT -6
How does the car run with the 4.6 in it now? Noticeable difference? Power? Mpgs? What other modifications have you made the car? Any kind of tuning?
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NinEFivEFourOH
Aurora Passenger
How about me and you, in the back of my Oldsmobile...
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Post by NinEFivEFourOH on Jun 5, 2012 20:51:31 GMT -6
How does the car run with the 4.6 in it now? Noticeable difference? Power? Mpgs? What other modifications have you made the car? Any kind of tuning?
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NinEFivEFourOH
Aurora Passenger
How about me and you, in the back of my Oldsmobile...
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Post by NinEFivEFourOH on Jun 5, 2012 20:51:47 GMT -6
How does the car run with the 4.6 in it now? Noticeable difference? Power? Mpgs? What other modifications have you made the car? Any kind of tuning?
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Post by Marc on Jun 5, 2012 21:06:50 GMT -6
Have you run it yet? If not, when you do, put a video & timeslips on here.
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Post by shelbyracing on Jun 6, 2012 7:31:03 GMT -6
Let's see 0-100 video n see what that thing can do.  |
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Post by sall on Jun 6, 2012 7:36:50 GMT -6
Let's see 0-100 video n see what that thing can do. w/ road and gauge cluster in same view |
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Post by shelbyracing on Jun 6, 2012 7:39:54 GMT -6
^x2
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Post by jmulder79 on Jun 6, 2012 12:03:25 GMT -6
I've only taken her up over the 100mph mark once. I'm not as adventurous now that I've got 2 kids and another on the way.  It's the 300hp vin 9 setup with the Autobahn package, so the difference isn't so much in off-the-line power; but between 20mph and 80mph it feels great. I'll try to get a video posted soon. I posted pics after the first swap, but no video yet. |
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Post by shelbyracing on Jun 6, 2012 13:24:13 GMT -6
Sweet man, n I know exactly what you mean. No 4.6 but I got the cams . Although the Autobahn gears help you get your momentum moving. |
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NinEFivEFourOH
Aurora Passenger
How about me and you, in the back of my Oldsmobile...
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Post by NinEFivEFourOH on Jun 7, 2012 16:21:15 GMT -6
How does the car run with the 4.6 in it now? Noticeable difference? Power? Mpgs? What other modifications have you made the car? Any kind of tuning? .... |
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Randy T.
Administrator
☯ AURORA GXP ☯
Posts: 3,758
Staff Member
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Post by Randy T. on Jun 14, 2012 18:28:23 GMT -6
I can see you posts, maybe no one else can, lol. There is a member here, Gator, I talk to him here and there, and he says his is running killer. He is all smiles when he talks about it. I am dying to line them up side by side, after my radiator gets in I will see if he will.
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