SPreston2001 Posted November 2, 2008 Report Share Posted November 2, 2008 Hi guys im trying to figure out if my STS has the redesigned Northstar motor wth a 10:1 compression ratio and not the 10:3:1. I know the swap happend in 2000 but im not sure if my model year 2000 was actually built in 99 and has the 10:3:1 compression. Is there a easy way to tell which motor I have? Thanks alot. Link to comment Share on other sites More sharing options...
BodybyFisher Posted November 2, 2008 Report Share Posted November 2, 2008 If you are thinking that you have reduced power because of this change read this, it explains why the change was performed, that is for the engine to use regular fuel, and with NO loss of performance. It was done with an improved combustion chamber design. This information was put together by the guru himself, bbobynski, I found it and posted this thread. I am looking at a 2000 and newer NS and was interested in the changes http://caddyinfo.ipbhost.com/index.php?showtopic=18499 Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
SPreston2001 Posted November 2, 2008 Author Report Share Posted November 2, 2008 No I was more concearnd about using regular fuel or not. Link to comment Share on other sites More sharing options...
BodybyFisher Posted November 2, 2008 Report Share Posted November 2, 2008 No I was more concearnd about using regular fuel or not. Well the main reason for the compression ratio change was to allow the NS to utilize regular. I thought that post by bbobynski was quite impressive, and that the 2000 was a major evolutionary improvement. Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
SPreston2001 Posted November 2, 2008 Author Report Share Posted November 2, 2008 So how would I be able to tell if my Northstar has the updated compression ratio? Link to comment Share on other sites More sharing options...
Ranger Posted November 2, 2008 Report Share Posted November 2, 2008 I think if you have a 2000, you can be pretty sure it has 10:1 compression ratio. Even if it didn't, the pre 2000's run just fine on regular. Link to comment Share on other sites More sharing options...
JimD Posted November 2, 2008 Report Share Posted November 2, 2008 If your car is registered and titled as a 2000 model year, that's what you have. No matter the "build date". Jim Drive your car. Use your cell phone. CHOOSE ONE ! Link to comment Share on other sites More sharing options...
SPreston2001 Posted November 3, 2008 Author Report Share Posted November 3, 2008 Ok thanks guys! Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.