Last post on May 12, 2009 at 6:08 AM
You are in the Oldsmobile Aurora
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Oldsmobile Aurora, Fuel System, Performance Mods, Sedan
#1108 of 1164 The Aurora IRL Legand
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?
#1109 of 1164 Re: The Aurora IRL Legand [cmcmanus]
Sep 07, 2005 (5:50 pm)
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.
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"
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.
#1112 of 1164 17" chrome wheels for sale
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.
#1113 of 1164 Re: The "Cadillac LeMans Northstar" [cmcmanus]
Sep 26, 2005 (9:54 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
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.
#1115 of 1164 request info about 2001+ THEFTLOCK
Sep 27, 2005 (4:33 pm)
Can someone tell me which type of THEFTLOCK was used in 2001+ Auroras?
Classics have the type that uses a 3-1/2 digit code that can be used to secure the radio. I suspect the newer ones use the type that is specific to the vehicle's VIN. Can anyone verify or not?
The reason for my question is that I want to install a 2001+ Aurora radio in my 1997. There's a high probability that this swap will not work, but I'm going to give it a try. My reason for wanting the newer radio is the RDS (radio data service) feature. I have looked into after-market units, but none that I have found will maintain functionality of the steering wheel controls without a clunky add-on that works through the after-market unit's remote control port.
#1116 of 1164 Re: request info about 2001+ THEFTLOCK [blk97aurora]
Sep 29, 2005 (9:53 am)
There is no code anymore. The radio gets some sort of key or something from the body control unit. So the radio won't work in another car. I'm sure the dealer has a way to reset/reprogram this, though. But there is no driver involvement needed (thankfully).
#1117 of 1164 New member
Oct 03, 2005 (11:25 am)
I just acquired a 1996 Black Aurora with 210,000kms for almost nothing. It was my wife's bosses car and he wanted to get rid of it.
I love it, and am really looking forward to fixing it up over the winter.
I plan on doing the K&N Airbox mods right away. Thanks for posting the instructions.
However, I've already replaced the plugs, and stupidly bought the most expensive ones I could (Bosch Platinum 4s) before I read in this forum that you recommend staying with Delco. I'm getting some hesitation when I accelerate now. Should I switch the plugs back to new Delcos?
Any help will be appreciated.