97 Aurora pace car - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Bonneville GXP/ Northstar Powered Cars Discuss your Bonneville GXP and/or any other Northstar powered Olds or Cadillac... Including the 3.5L Twin Cam V6 (Short Star ) 4.0L and 4.6L Northstar V8's. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 02-19-2004, 01:05 AM   #1
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Default 97 Aurora pace car

Didnt know if you guys knew this info, I didnt until tonight. I knew about the Aurora Indy car engine but not of its success. Must be a good engine ey ?

http://indypacecars.com/1997.html
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Old 02-19-2004, 01:09 AM   #2
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Quote:
A 650-horsepower version of that same engine went on to win the 1997 Indy 500, marking the first time the same engine design had both paced and won at Indy.
Very interesting.
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Old 02-19-2004, 09:48 AM   #3
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Ya, I've known about this for a while now...



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Old 02-19-2004, 12:30 PM   #4
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"The Aurora'* standard 250-horsepower, 4.0L V-8 engine meant the car needed no performance modifications." I like this one too.

At the bottom of the 442.com engine page they have specs for both engines. Notice they increased the bore and shortened the stroke. That and camshaft + a valve train to support 10,500 RPM . 13 - 15.1 comp. wow ! Methanol must be good stuff.

http://442.com/oldsfaq/ofeng.htm#ENG...20Car%20Engine

Was there a 4 litre limit for the engines ? I ask because Im wondering if thats why the Aurora engine not the bigger Northstar.
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Old 02-19-2004, 12:39 PM   #5
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Apparently the 4.0L is not really a Northstar in the same way Northstar is for Cadillac. The 4.0L Aurora V8

Sounds like my car...almost

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The Aurora will have white diamond metallic paint with black and gold highlights (sounds like the performance colors of about 28 yrs. ago) with Indy 500 graphics. A power sunroof, 3.71:1 transaxle ratio (included with the Aurora'* optional Autobahn package), chrome plated aluminum alloy wheels and Goodyear Eagle P235/60R16 tires rated for sustained 150 mph speed. The non-stock items that will be installed are those mandated by USAC which include a roll bar and a five-point safety harness for the driver and passenger.
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Old 02-19-2004, 12:54 PM   #6
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Wow, I didn't realize the 4.0 had 10.3:1 compression. That'* pretty high.
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Old 02-19-2004, 12:56 PM   #7
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SSEi'* are like 9.1:1 right?

To be honest I didn't know the 4.0L compression was that high either...I think its a winner mill
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Old 02-19-2004, 12:57 PM   #8
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Quote:
Originally Posted by Jim W
SSEi'* are like 9.1:1 right?

To be honest I didn't know the 4.0L compression was that high either...I think its a winner mill
I believe the SSEi is a 8.5:1.


You have quite an engine Jim.
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Old 02-21-2004, 02:26 AM   #9
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L27 is 8.5 the others are either 9 or 9.5. Keep in mind this is before the blower, which significanly raises it.
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Old 02-21-2004, 11:58 AM   #10
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I beleive
LN3-C - 8.5
L27 - - -8.5
L67 I -- 8.5 ? not sure on this one
L36 - - -9.3
L67 II - 8.5

I checked "techinfo" on this quickly and didnt fine engine spec. but they got to be there somewhere. I just scearched "specifications". Try engines bet that will work. edit : didnt work no specs for compression.

Jr3800 knows.
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