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Post by myerky89 on Nov 13, 2017 15:02:33 GMT -6
Where can I get true performance parts for my 99 aurora?? Looking for power and also my car is topped at 105mph. Need that governer gone
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tigger
Administrator 
Posts: 2,844 
Staff Member
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Post by tigger on Nov 13, 2017 15:12:31 GMT -6
a PCM tune is the only way to get rid of the limiter.
Very little aftermarket for this engine...
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Post by Marc on Nov 13, 2017 19:35:28 GMT -6
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Post by Toronado3800 on Nov 13, 2017 20:06:31 GMT -6
Accelleration to 105 is way more exciting than bolting down a straight booring highway @ 130.
Anyone sell gear kits? Perhaps Northstar underdrive pulleys and exhaust?
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Post by sall on Nov 13, 2017 20:08:48 GMT -6
pcm tune, cai, 4.6L...
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RCA1186
Administrator
Rob
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Post by RCA1186 on Nov 14, 2017 7:37:10 GMT -6
Yep, you can get the governor removed with a tune. Pretty much nothing available for aftermarket performance as far as I know.
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randnon
Aurora Passenger
Posts: 246
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Post by randnon on Dec 16, 2017 22:48:29 GMT -6
I have had my base 95 and 99 to approx 125 mph and did not notice the 120 mph limiter. I am sure it is not set as low as 105mph. BTW it was still climbing at a great rate when I let off the accelerator. These things are not that fast off the line but my two base first gen's will leap from 50 to 100 mph in a flash. I have no special tune. Rich in Buffalo
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Post by Marc on Dec 17, 2017 6:33:28 GMT -6
Is it possible that they have the Autobahn?
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randnon
Aurora Passenger
Posts: 246
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Post by randnon on Dec 17, 2017 14:44:45 GMT -6
Hello Marc, I purchased the 95 new and have checked the build codes on the 99 that I bought in 2011 and both are base models . My trek above 120 mph was only for about 1 minute, but I felt no cut off, perhaps their is a time delay. I once tried a Autobahn PCM in the 99 and the guy,s in the club were correct in stating that the transmission was not happy at all. A couple of blocks of hard shifts and banging and I was back at home switching back to the base model PCM. I was more careful in my selection when I went to the pick and pull from then on. BTW it showed no codes with the wrong PCM. I think the std tires are rated for 120mph and so was the cutoff. I am quite sure it is not as low as 105mph. Rich
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RCA1186
Administrator
Rob
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Post by RCA1186 on Dec 18, 2017 7:17:21 GMT -6
The cutoff for the Non-Autobahn is around 110mph. Around 140mph for the Autobahn. I took my non-bahn to the cutoff before, its instant and you know it when it comes on. What's an Autobahn - and do I have one ? This is a variation on what is one of the most common questions on the forums. "What is the Autobahn option?" The Autobahn option only applies to classic Auroras and it was a factory option that included Michelin tires with a V speed rating instead of a standard S rating, and a 3.71 transaxle final ratio instead of the standard 3.48. What they didn't advertise - and the reason why many people ask if they have the option - is that these two changes allowed the engineers at Oldsmobile to increase the speed limiter from 110 mph in the non-Autobahn car up to 135-140 mph in the Autobahn equipped car. In addition to a greater maximum speed the optional transaxle ratio also gives quicker acceleration (and poorer fuel economy).
"Do I have one?" The obvious way to find out if your Aurora has the Autobahn option is to take the car out for a drive and see if you can go faster than 110 mph - this may not be practical though, and an easier way is to check the tire information label inside the driver's door and see if it lists V rated tires, don't bother to check the tires themselves as they may not be the originals. Another way is to read the RPO list which you'll find inside the trunk - (the exact location of the list depends on the year of the car, up to 1996 it was inside the trunk liner near the antenna, and on the 1997 and up it was on the inside of the spare tire cover.) The autobahn car will have a code of QQX for the V rated tires, and a code of FV4 for the final drive ratio of 3.71. Oldsmobile dealers may have offered different packages of options, or "Preferred Equipment Groups" but nothing else was included with the Autobahn package from the factory. Chrome wheels, sliding glass sun roof, gold graphics and more were all offered as options on the Aurora, but none of these on the car are an indication that the car has the Autobahn option. Autobahn was not an option with the 4 litre Generation 2 Auroras, they have H rated tires standard, as well as the 3.71 final drive ratio and they are speed limited to 135 mph. (Tire speed ratings: V=149 mph; H=130 mph; S=112 mph.) www.howardm.net/dred98/autobahn.php |
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tigger
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Post by tigger on Dec 18, 2017 23:40:44 GMT -6
That's interesting...
I've always thought my "Autobahn-esque" 3.71/4.0 2G was limited to 129mph, hence the H rated tires. Not that I'll ever find out if the extra 6mph is really there, haha!
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Post by AuroraGirlFromMars on Sept 30, 2020 3:24:31 GMT -6
Buick park avenue states in FSM that top speed is determined by engine(1 or 2 depending on year), performance or other RPO, tires(usally as part of package), final drive ratio, etc
I could look in my aurora manual for something similar
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Post by aaron29 on Nov 11, 2020 3:34:47 GMT -6
Hi, probably an exhaust upgrade and complement with a cold air intake? I'm not sure if that fits the idea.
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Post by aaron29 on Nov 14, 2020 22:34:14 GMT -6
Hi, probably an exhaust upgrade and complement with a cold air intake? I'm not sure if that fits the idea. I just want to share my K&N Cold Air Intake I had installed on my 99 Aurora. I added exhaust headers which is a good complement for my intake. I can really feel the boost in terms of horsepower and throttle response (no plans to measure it in tuning). There was also a comparison article with Spectre but I leaned on getting K&N. Pretty much it is bolt on and no issues with the engine aside from the great sound it makes. |
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Post by AuroraGirlFromMars on Nov 15, 2020 11:39:39 GMT -6
Hi, probably an exhaust upgrade and complement with a cold air intake? I'm not sure if that fits the idea. cold air intake actually has to be a cold air intake = IE, not a cone in place of filter. A cold air intake usually requires some custom work on your part and some creativity. |
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tigger
Administrator
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Post by tigger on Nov 16, 2020 15:43:02 GMT -6
...I added exhaust headers which is a good complement for my intake. Where did you find headers for the 4.0? |
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Post by AuroraGirlFromMars on Dec 4, 2020 9:23:34 GMT -6
...I added exhaust headers which is a good complement for my intake. Where did you find headers for the 4.0? maybe he had custom ones(not much you can do) or he had no exhaust manifold and now does |
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Post by aaron29 on Jan 29, 2021 3:05:22 GMT -6
Where did you find headers for the 4.0? maybe he had custom ones(not much you can do) or he had no exhaust manifold and now does yeah I had custom ones, a guy near me around Hercules, CA did it for me. No leak whatsoever, perfect fit. |
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plato442
Aurora Driver
Life, Liberty, and the pursuit of Oldsmobile...
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Post by plato442 on Jan 29, 2021 10:08:28 GMT -6
A few performance parts exist. Volant makes a true cold air intake that is meant to fit an STS or DTS. Corsa made an exhaust kit. High flow cat. Custom headers. Granatelli MAF. CHRFab made replacement cam shafts. Squires turbo makes remote mounted turbos. I’m a little shocked N* performance is still in business honestly. And wester’s garage. Most things performance have to be searched under the 4.6 Cadillac. Old article: www.hotrod.com/articles/hrdp-1006-northstar-cadillac-engine-buildup-question/ |
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RCA1186
Administrator
Rob
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Post by RCA1186 on Jan 29, 2021 10:25:27 GMT -6
maybe he had custom ones(not much you can do) or he had no exhaust manifold and now does yeah I had custom ones, a guy near me around Hercules, CA did it for me. No leak whatsoever, perfect fit. Do you have any pictures of the headers? I've never seen an Aurora with headers before, sounds really cool! |
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Post by avantiguy on Aug 21, 2021 14:45:19 GMT -6
Don't want to sound like "your father's Oldsmobile," but there are many upgrades to the suspension (both ends) and brakes. I think of this car as a great handler for its size, and those changes can really be felt and appreciated -- especially if your rear stability system hasn't been working right. Out-handle the other big luxury cars, and they'll remember it a lot longer than if you just out-accelerated them once...
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