Jump to content
CaddyInfo Cadillac Forum

Recommended Posts

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


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...

Posted Image
Link to comment
Share on other sites

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

Studs.jpg

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

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

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

Studs.jpg

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.

Posted Image
Link to comment
Share on other sites

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

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

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

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...