98eldo32v Posted March 31, 2010 Report Share Posted March 31, 2010 Well, I'm sitting here thinking about my Eldo. I know I'm going to eventually purchase and install Northstar Performance's stud kit, but it just dawned on me.... Has anyone advanced or retarded the cams on these motors to extract more power? My 93 quad 4 project (which I'm still working on), I know you could advance the intake cam +2 degrees, and retard the exhaust -2 degrees according to olds rocket parts. They used to sell the sprockets, but I can't seem to find them. I was just wondering if the same technique could be applied to the Northstar........ Link to comment Share on other sites More sharing options...
Texas Jim Posted April 1, 2010 Report Share Posted April 1, 2010 Very interesting question... sorry I don't know the answer. Do the Northstar pistons have valve relief's in them? If they do...it means a very close fit from the valves to the piston. If the cams were advanced / retarded...would the valves then hit the pistons? I do not know... Link to comment Share on other sites More sharing options...
BodybyFisher Posted April 1, 2010 Report Share Posted April 1, 2010 If I recall the Northstar is an interference engine meaning that the pistons and valves can hit if out of time (timing chain time), and yes the pistons have valve reliefs in them 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...
BodybyFisher Posted April 1, 2010 Report Share Posted April 1, 2010 If anyone knows the answer to that, these people would http://www.chrfab.com/Engines.htm 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...
Texas Jim Posted April 1, 2010 Report Share Posted April 1, 2010 If I recall the Northstar is an interference engine meaning that the pistons and valves can hit if out of time (timing chain time), and yes the pistons have valve reliefs in them Thanks, Mike. Thats what I thought...but wasn't 100% sure. I was thinking that the close tolerance was one reason we can get "COLD CARBON RAP" on the N* engine. SO... it looks like if you changed the cam timing... it is "VERY POSSIBLE" that the valves could / would, hit the pistons. Thanks again. Link to comment Share on other sites More sharing options...
98eldo32v Posted April 1, 2010 Author Report Share Posted April 1, 2010 my quad four is an interference engine and has valve reliefs in the pistons also. the timing on that engine can be altered. The question is can it be done to the northstar too. I suppose no one has attempted it yet..... Link to comment Share on other sites More sharing options...
BodybyFisher Posted April 1, 2010 Report Share Posted April 1, 2010 my quad four is an interference engine and has valve reliefs in the pistons also. the timing on that engine can be altered. The question is can it be done to the northstar too. I suppose no one has attempted it yet..... I am pretty sure it has not been attempted. You might send an email to the link I provided above and see if they would be helpful. Let us know what you find out 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...
98eldo32v Posted April 2, 2010 Author Report Share Posted April 2, 2010 my quad four is an interference engine and has valve reliefs in the pistons also. the timing on that engine can be altered. The question is can it be done to the northstar too. I suppose no one has attempted it yet..... I am pretty sure it has not been attempted. You might send an email to the link I provided above and see if they would be helpful. Let us know what you find out will do... thanks for the link.. Link to comment Share on other sites More sharing options...
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