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Oldsmobile Aurora: Modifications

1164 messages,  Last post on May 12, 2009 at 6:08 AM

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What is this discussion about? Oldsmobile Aurora, Fuel System, Performance Mods, Sedan

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#1105 of 1164 Corsa Exhaust by garnes Aug 11, 2005 (6:40 pm)
Colin, e-mail me at greg.garnesearthtech.com. I can walk you through the Corsa exhaust and send you pictures of the modification necessary. They are also on another site. I think the name of the site is something like Howard's Aurora page or something. Give it a search. You have to find a VERY GOOD custom exhaust shop that works with 304 stainless steel to modify the Corsa STS system. If you do this, you might want to share my pictures and experience with whoever is doing the work.   I've done the air box mod with a K&N. It's the only way to go. You won't screw up the intake air temp and it flows just fine. I've done the RSM throttle body and of course the Corsa exhaust. The exhaust is the best. I did this at least a couple years ago and love it every day. I got it for the power, but ended up loving it for the sound.   Off the line the car is not much different, but once you are moving it pulls really nice. I took on a Mustang GT (260 HP 300 torque) convertible from a roll of about 30 to 40 mph and we both just hammered it. I stayed glued to that GT. He couldn't pull an inch away from me. So, from a roll, I could equal a GT - not bad for a nearly 4,000 pound cruiser. The extra weight on the convertible probably helped me a little too. From the line I would have been toast however. The Aurora V8 produces a lot of power over a very wide rpm range, so from a roll the car is pretty strong.
#1106 of 1164 Re: Anybody tried Optima performance module? [maac8124] by lithuanian98 Aug 16, 2005 (5:30 pm)
Replying to: maac8124 (Aug 05, 2005 7:54 am) Have you bought the performance module from ebay? If so how does it work?
#1108 of 1164 The Aurora IRL Legand by cmcmanus Sep 07, 2005 (2:54 am)
THE AURORA RECORD   Oldsmobile's IRL Aurora V8 engine has competed in 50 Indy Racing League events since its introduction in January 1997. The following is a summary of its Indy Racing record to date:   Victories: 48 of 50 (96%) Pole Starts: 50 of 50 (100%) Fastest Laps: 46 of 50 (92%) Laps Led: 9,708 of 10,175 (95.4%) Miles Led: 13,473 of 14,108 (95.5%) Total Racing Laps: 185,524 of 198,774 (93.3%) Total Racing Miles: 259,595 of 278,963 (93.1%) Starters: 1,203 of 1,299 (92.6%) Finishers: 710 of 755 (94%)   How can I get an Aurora IRL Engine? Is it possible? Can I bore mine out to match that of the IRL version? Mmmmm, methanol sounds fun? Right? I dunno.                                     Production Aurora V-8 - Indy Aurora V-8 Displacement: 4.0 liters (244ci) - 4.0 liters (244ci) Cylinder Angle: 90 degrees - 90 degrees Cylinder Bore Spacing: 102mm - 102mm Valvetrain: Dual overhead cams - Dual overhead cams Valves per Cylinder: 4 - 4 Camshaft Drive: Chain - Chain Cylinder Head Material: Aluminum - Aluminum Cylinder Case Material: Aluminum - Aluminum Cylinder Liners: "Dry" iron - "Dry" iron Crankshaft Design: 90 degrees - 90 degrees Fuel System: Sequential EFI - Sequential EFI Engine Controller: Delco Electronics - Delco Electronics Maximum rpm: 6,400 - 10,500 Horsepower: 250hp 5600 - rpm 600+ hp Fuel: Unleaded gasoline - Methanol Bore Diameter: 87mm - 93mm Crankshaft Stroke: 84mm - 73.4mm Deck Height: 8.84" - 8.1" Compression Ratio: 10.3:1 - 13-15:1 Throttle System: Throttle Body - Individual Runner Lubrication System: Wet Sump - Dry Sump   So how can I get my engine close to its IRL cousin without completely ruining it?   Replies to this message: blk97aurora (Sep 07, 2005 5:50 pm)
#1109 of 1164 Re: The Aurora IRL Legand [cmcmanus] by blk97aurora Sep 07, 2005 (5:50 pm)
Replying to: cmcmanus (Sep 07, 2005 2:54 am) After Olds exited IRL, there were a few engines that showed up on eBay. I haven't seen any recently. Your best bet is to contact teams that campaigned Auroras in IRL (I don't know how to do that). Are you looking for a street legal solution? If so, I do not think an IRL engine will meet your needs.   I have read that no one rebuilds Northstar engines -- the expense is too high. 0.010" oversize pistons and rings may be available. But boring out from 87mm to 93mm is not going to work. New iron liners would be required, and I do not know if that is possible for less than megabucks.   As you probably have already found out, available performance equipment for Aurora is minimal. K&N filter and airbox mods are cheap and will give you a few horsepower. Corsa exhaust will cost about $1000 and give you ~10 horsepower. The RSM 80mm throttle body may be good for 3-5 horsepower. Altogether, you may be able to get 20-25 horsepower increase from these intake and exhaust mods.   In the 5 years I have owned my '97, I have thought a lot about performance increases. I think that swapping in a 4.6 liter Cadillac engine may be reasonable, although expensive. The late 1990s STS output is 300hp at 6000 rpm and 295 lb-ft at 4400 rpm; the SLS is 275hp at 5600 rpm and 300 lb-ft at 4000 rpm. Our Auroras (250hp at 5600 rpm and 260 lb-ft at 4400 rpm) fall between the two Cadillac engines when normalized for the displacement difference. People have claimed that the Cadillac-to-Aurora swap cannot be done because of motor mount differences. May be true; I do not know of a proof of existence. Swapping in the STS cams may be possible for a few hp at higher rpm, but the expense and labor of 4 cams would likely be prohibitive.   If you are adventurous, nitrous oxide is an option.   On one of the Cadillac forums there was talk of developing a turbocharger kit. I do not know if that ever happened.   I wonder if the new Impala/Monte Carlo 303-hp motor is a possibility.   Les
#1110 of 1164 IMSA V8 by rjs200240 Sep 09, 2005 (11:11 am)
It would be easier to get your motor closer to it's IMSA cousin. That record is more impressive in my opinion, because they had more competition. And that motor is much closer to your production one. Olds has a Motorsports Handbook that can help. But a racing engine in a sedan is an unlikely proposition.
#1111 of 1164 The "Cadillac LeMans Northstar" by cmcmanus Sep 26, 2005 (1:48 am)
I jsut found this out tonight thought I'd share.   The engine is a 4.0 liter twin-turbocharged aluminum 32-valve V8. GM Motorsports has taken the experience from successful IMSA and IRL efforts and created the new Northstar. Key partnerships with McLaren racing engines and IHI turbos will advance the expertise in turbo package development. Boosted to 1500 mbar (44.3 in. Hg), testing has resulted in very high torque, and a wide flat maximum power range.   Replies to this message: rjs200240 (Sep 26, 2005 9:54 am)
#1112 of 1164 17" chrome wheels for sale by blk97aurora Sep 26, 2005 (9:49 am)
There are two current eBay auctions for 2001-2003 Aurora 17" chrome wheels. I have absolutely no affiliation with the seller.   Les
#1113 of 1164 Re: The "Cadillac LeMans Northstar" [cmcmanus] by rjs200240 Sep 26, 2005 (9:54 am)
Replying to: cmcmanus (Sep 26, 2005 1:48 am) This motor was used in the Cadillac effort with their LMP-900 car. It competed in ALMS and at LeMans.
#1114 of 1164 Speaker swap questions by 2002v6 Sep 27, 2005 (6:58 am)
I just got a 2002 without the Bose system and am upgrading the speakers to Polks. I have 6X9 and 6.75" speakers and could use some advice on the proper wiring and how to get at the speakers to replace them in both locations. Thanks.

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