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Could someone please tell me the difference in engine specifications in the 275HP & 300HP NorthStar engines use in the 2003 Cadillacs.

Thank You,
David Livingston
[email protected]
 

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I wonder how much of that "difference" you could really feel under normal driving conditions?

The Caddy salesman told me he couldn't really tell. And since he said it while I was sitting in a DTS, I tend to believe him. He also said that the DTS would blow the doors off of a stock '96 Fleetwood.
 

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1996 Fleetwood
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2 Things. 1, if you drive like I do, you'd probably notice the difference. 2, The Fleetwood, in 95, 96 with the LT1 350, will not give up a thing to the Northstars. I have a buddy with a Caprice, (basically same car) and with exhaust, intake, msd ignition, and 150,000+ miles on it. Runs mid 14's. Like a 14.5 The differences in accel will be the LT1 powered cars off the line, but the Northstar fed cars a bit farther down the track.
 

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Chuck C said:
Here's the difference....the Touring (300hp) motor has balls....it's all due to that nice gear ratio.

:burn:
Trying to indicate my 275 horse version has no balls? :mad: You might be surprised what more torque earlier in the power band than the ETC can do.
 

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ShadowLvr400 said:
Trying to indicate my 275 horse version has no balls? :mad: You might be surprised what more torque earlier in the power band than the ETC can do.
phil, didn't mean to step on your toes there...i edited my original message too. Nice car btw.
 

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No worries Chuck, I wasn't deeply offended, just a bt annoyed. So hard to get sporting respect with a Caddy. Though the autocross did pretty well. Btw, will I be able to host the vids on here?
 

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1996 Seville STS
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Chuck C said:
Here's the difference....the Touring (300hp) motor has more balls than the 275 hp....it's all due to that nice gear ratio.

:burn:
What are the shift points for the STS and SLS, and ETC. I have a 96 STS with supposedly the STS engine. It shifts 1st to 2nd between 6500-7000 RPMS at 45-50 MPH if I am on it. I was surprised that the speed was that high. I would have guessed that with 3:76 gears it would be shifting closer to 25 or 30 MPH. It is fast, but what are other people experiencing for shift points.

Based only on the shift, does anyone think I have the SLS or STS drivetrain? The car I have has had a lot of work done on it. I am still trying to figure out what I have.

Jon
96STS
 

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Elvis said:
I would never bet against ANY of the modified LT1's on this forum!
People go nuts on the 5.7 L Chevy's. There is every conceivable modification available. Some of those 5.7s can make more than three times as much power as a Northstar. They could have Nitrous, Superchargers, Turbo chargers, custom aluminum blocks, stroker cranks, and there are 32 Valve heads available. With some modifications people rev them up to 8000 RPMs. The Northstar is a great engine, but so far to my knowledge people have not been modifying them very much.

I would love to see a turbo kit come along. I am sure someone has probably installed a 5.7L in a Seville.

Jon
96STS
 

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2016 SRX AWD Premium 2011 DTS Platinum
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dslivingston said:
Could someone please tell me the difference in engine specifications in the 275HP & 300HP NorthStar engines use in the 2003 Cadillacs.

Thank You,
David Livingston
[email protected]
wife drives a 1999 sls (275hp) i have a 2001 dts (300hp)
i agree with the difference is BALLS.
even with the weight of the dts it is still a rocket!
wish i could persuade her to a drag race!
charlie
 

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ShadowLvr400 said:
No worries Chuck, I wasn't deeply offended, just a bt annoyed. So hard to get sporting respect with a Caddy. Though the autocross did pretty well. Btw, will I be able to host the vids on here?
I would love to see the autocross videos. Are they available on the web somewhere?
 

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jonrodman said:
What are the shift points for the STS and SLS, and ETC. I have a 96 STS with supposedly the STS engine. It shifts 1st to 2nd between 6500-7000 RPMS at 45-50 MPH if I am on it. I was surprised that the speed was that high. I would have guessed that with 3:76 gears it would be shifting closer to 25 or 30 MPH. It is fast, but what are other people experiencing for shift points.

Based only on the shift, does anyone think I have the SLS or STS drivetrain? The car I have has had a lot of work done on it. I am still trying to figure out what I have.

Jon
96STS
i have a 97 sts and it shifts the same between 6500 & 7000rpm 1-2 shift.
 

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dkrj said:
i have a 97 sts and it shifts the same between 6500 & 7000rpm 1-2 shift.
Do you know what speed are you traveling when your 97STS shifts at 6500-7000 rpms? Is it around 45-50 mph or less?
 

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jonrodman said:
I would love to see the autocross videos. Are they available on the web somewhere?
I'm trying to beat my friend into tracking down the cord for his camera. He moves into his new house like next week or two. After that, I should be able to get the cord, and then copy it to computer. So, give me some time to bully him into it.
 

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jonrodman said:
Do you know what speed are you traveling when your 97STS shifts at 6500-7000 rpms? Is it around 45-50 mph or less?
didn't look but next time i will and i'll let you know. it should be the same because as far as i know speed and rpm are gear ratio related.
 

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I think he was asking for the shift points of 1-2. Like engine rpm, and vehicle speed. I have a feeling that with the 3.73 touring version, it'll be 6800 rpms and 42-45 mph. The non touring version, like my eldo is 6200 rpms and 45 mph.
 

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dkrj said:
didn't look but next time i will and i'll let you know. it should be the same because as far as i know speed and rpm are gear ratio related.
Yes, you are correct - they are gear ratio related. I am not sure what engine and transmission mine has. This would be a way to verify. I know it feels fast, but it appears as if the engine has been removed and replaced. I figured that if yours shifted at the same speed and rpm then I probably still have an STS engine and transmission in it.

My car appears to be a "theft/recovery" vehicle. It was missing several parts, had a borken window and door handle and a lot of items were unplugged as if someone had started parting it out. I don't know any history on this car, and wanted to verify that I have the 3:76 gears. It has shaped up to be a really nice car. I am hoping that someone did not replace the STS engine with an SLS. If they did, it still runs great, but I would like to know.
 

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jonrodman said:
My car appears to be a "theft/recovery" vehicle. It was missing several parts, had a borken window and door handle and a lot of items were unplugged as if someone had started parting it out. I don't know any history on this car, and wanted to verify that I have the 3:76 gears. It has shaped up to be a really nice car. I am hoping that someone did not replace the STS engine with an SLS. If they did, it still runs great, but I would like to know.
Check the VIN. The.... 8th? (Someone confirm please) digit should be either a 9, or a Y. 9 is touring, Y is base.
 
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