Pontiac Grand Prix Forums : Grandprix
 

Grand Prix Forums is the premier Pontiac Forum on the internet. Registered Users do not see the above ads. Please Register - It's Free!

Pontiac Grand Prix Forum - Welcome Register today! Contact us!

Page 1 of 10 123 ... LastLast
Results 1 to 20 of 195

Thread: Cam questions

  1. #1
    GTX Level Member suitercrew's Avatar
    Join Date
    Oct 2015
    Posts
    1,663
    Chats
    0

    Default Cam questions

    Hey guys I've been thinking about putting a cam in and had a couple questions. I don't want to go with a vs but i was hoping to find a cam I wouldn't have to upgrade my valvesprings with. They are currently 90# springs. I have heard of people running 90# springs with the xp cam which I assume is safe as long as you keep your shift points probably around the 6200 area. Also does anyone have experience with the nic cam. It has the least amount of lift so I figured it would be best pared with the 90# springs.

    Sent from my LG-H901 using Tapatalk

  2. #2
    GXP Level Member GTPpower's Avatar
    Join Date
    May 2008
    Location
    Schuyler, NE
    Posts
    2,316
    Chats
    255

    Default Re: Cam questions

    Nic and vs are about your only choices. 90's are way too weak for an xp or s1x.

    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
    2005 F350 6.0 - studded, deleted, bulletproofed, tuned
    1966 Olds Cutlass 442 Convertible
    2000 Chevy Silverado 2500 6.0l

  3. #3
    GTX Level Member suitercrew's Avatar
    Join Date
    Oct 2015
    Posts
    1,663
    Chats
    0

    Default Re: Cam questions

    Quote Originally Posted by GTPpower View Post
    Nic and vs are about your only choices. 90's are way too weak for an xp or s1x.
    Ok well I really like the nic actually my only question with that would be that they say it has a lot of overlap. So would that effect the ability to pass emmisions? Also is overlap hard on the timing chain to the point I need a double roller?

    Sent from my LG-H901 using Tapatalk

  4. #4
    GXP Level Member GTPpower's Avatar
    Join Date
    May 2008
    Location
    Schuyler, NE
    Posts
    2,316
    Chats
    255

    Default Re: Cam questions

    A stock timing chain will be fine.

    I do think that about any cam besides the vs will make it really hard to pass emissions if you have a sniffer test.

    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
    2005 F350 6.0 - studded, deleted, bulletproofed, tuned
    1966 Olds Cutlass 442 Convertible
    2000 Chevy Silverado 2500 6.0l

  5. #5
    GTX Level Member suitercrew's Avatar
    Join Date
    Oct 2015
    Posts
    1,663
    Chats
    0

    Default Re: Cam questions

    I don't have a sniffer test, although I'm running e54 too so idk if that helps too

    Sent from my LG-H901 using Tapatalk

  6. #6
    Donating Users coolone's Avatar
    Join Date
    Nov 2011
    Location
    NY
    Posts
    2,210
    Chats
    1634

    Default Re: Cam questions

    90# Valve Springs aren't stock... And if you're changing Spings it's best to match them to the application. You have to take the front cover off anyways to replace cam, so while there, you might as well do a few other things. Assuming you'll pull the engine to do this work, it's go BIG or go home... Front & Rear gaskets, oil pan gasket, double roller with 105# springs at least, port SC or GenV, clean injectors, new injector Orings, all new lim gaskets, trans pan drop, new filter, shift kit and fluid, flush engine and cooling system to remove Dex Crap... Whoola! New engine! And for heavens sake, shifting at 6200 is worthless... Barely any of the cams make power there, shifting a few hundred rpm lower is the trick.

    Regards

  7. #7
    GTX Level Member suitercrew's Avatar
    Join Date
    Oct 2015
    Posts
    1,663
    Chats
    0

    Default Re: Cam questions

    Quote Originally Posted by coolone View Post
    90# Valve Springs aren't stock... And if you're changing Spings it's best to match them to the application. You have to take the front cover off anyways to replace cam, so while there, you might as well do a few other things. Assuming you'll pull the engine to do this work, it's go BIG or go home... Front & Rear gaskets, oil pan gasket, double roller with 105# springs at least, port SC or GenV, clean injectors, new injector Orings, all new lim gaskets, trans pan drop, new filter, shift kit and fluid, flush engine and cooling system to remove Dex Crap... Whoola! New engine! And for heavens sake, shifting at 6200 is worthless... Barely any of the cams make power there, shifting a few hundred rpm lower is the trick.

    Regards
    I plan on dropping the subframe and doing it through there. Although most of what you just said I've already done. I do really need to replace my oil pan gasket though. I know 90s aren't stock I put them in with my rockers but at the time I had the heads off so it was super easy to do. I only have the valve spring compressor that fits around the whole head, I also only have a 3 gallon air compressor that I don't think is even big enough to hold air in the cylinder. Anyway I'd really rather not change the springs if I didn't have to.

    Sent from my LG-H901 using Tapatalk

  8. #8
    GXP Level Member GTPpower's Avatar
    Join Date
    May 2008
    Location
    Schuyler, NE
    Posts
    2,316
    Chats
    255

    Default Re: Cam questions

    Spend $10 and buy a lever style spring compressor.

    And you don't need air. Turn the motor over so the piston in the chamber you are working on is at TDC, and let the valve sit on it. You can stuff some twine in the combustion chamber to hold the valve up more if you want.

    If you don't have a sniffer test, you can run any cam. Do they just check for engine lights?

    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
    2005 F350 6.0 - studded, deleted, bulletproofed, tuned
    1966 Olds Cutlass 442 Convertible
    2000 Chevy Silverado 2500 6.0l

  9. #9
    GTX Level Member suitercrew's Avatar
    Join Date
    Oct 2015
    Posts
    1,663
    Chats
    0

    Default Re: Cam questions

    Quote Originally Posted by GTPpower View Post
    Spend $10 and buy a lever style spring compressor.

    And you don't need air. Turn the motor over so the piston in the chamber you are working on is at TDC, and let the valve sit on it. You can stuff some twine in the combustion chamber to hold the valve up more if you want.

    If you don't have a sniffer test, you can run any cam. Do they just check for engine lights?
    Last time i went they just plugged it in, didn't even do a visual.

    Sent from my LG-H901 using Tapatalk

  10. #10
    GTX Level Member suitercrew's Avatar
    Join Date
    Oct 2015
    Posts
    1,663
    Chats
    0

    Default Re: Cam questions

    Is the only way to check tdc with the lim off?

    Sent from my LG-H901 using Tapatalk

  11. #11
    GXP Level Member GTPpower's Avatar
    Join Date
    May 2008
    Location
    Schuyler, NE
    Posts
    2,316
    Chats
    255

    Default Re: Cam questions

    All you need to do is pull the spark plug out, hold a small screwdriver, pick, etc in the hole and turn the motor over til you feel the piston contact whatever you are sticking in the spark plug hole.

    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
    2005 F350 6.0 - studded, deleted, bulletproofed, tuned
    1966 Olds Cutlass 442 Convertible
    2000 Chevy Silverado 2500 6.0l

  12. #12
    GTX Level Member suitercrew's Avatar
    Join Date
    Oct 2015
    Posts
    1,663
    Chats
    0

    Default Re: Cam questions

    Quote Originally Posted by GTPpower View Post
    All you need to do is pull the spark plug out, hold a small screwdriver, pick, etc in the hole and turn the motor over til you feel the piston contact whatever you are sticking in the spark plug hole.
    That's actually really obvious.. Now I feel stupid. I was reading some posts and other guys said to find tdc you had to watch the lifters for preload and thats where I got lost but this is way easier.

    Sent from my LG-H901 using Tapatalk

  13. #13
    GTX Level Member suitercrew's Avatar
    Join Date
    Oct 2015
    Posts
    1,663
    Chats
    0

    Default Re: Cam questions

    Now if I went with a milder cam like the s1x is it recommended to replace lifters and pushrods or are stickers ok

    Sent from my LG-H901 using Tapatalk

  14. #14
    GXP Level Member GTPpower's Avatar
    Join Date
    May 2008
    Location
    Schuyler, NE
    Posts
    2,316
    Chats
    255

    Default Re: Cam questions

    Quote Originally Posted by suitercrew View Post
    That's actually really obvious.. Now I feel stupid. I was reading some posts and other guys said to find tdc you had to watch the lifters for preload and thats where I got lost but this is way easier.

    Sent from my LG-H901 using Tapatalk
    To find exact TDC for timing and clearance purposes, it's way more extensive. But you just need it about at the top for this.

    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
    2005 F350 6.0 - studded, deleted, bulletproofed, tuned
    1966 Olds Cutlass 442 Convertible
    2000 Chevy Silverado 2500 6.0l

  15. #15
    GXP Level Member GTPpower's Avatar
    Join Date
    May 2008
    Location
    Schuyler, NE
    Posts
    2,316
    Chats
    255

    Default Re: Cam questions

    Quote Originally Posted by suitercrew View Post
    Now if I went with a milder cam like the s1x is it recommended to replace lifters and pushrods or are stickers ok

    Sent from my LG-H901 using Tapatalk
    Stock lifters are ok with all cams, unless they are damaged.

    Stock pushrods usually work, but you would need to measure to know for sure. But most people run stock without ever measuring and have no issues.

    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
    2005 F350 6.0 - studded, deleted, bulletproofed, tuned
    1966 Olds Cutlass 442 Convertible
    2000 Chevy Silverado 2500 6.0l

  16. #16
    GTX Level Member suitercrew's Avatar
    Join Date
    Oct 2015
    Posts
    1,663
    Chats
    0

    Default Re: Cam questions

    Ok so my check list is cam, timing chain, chain tensioner, gaskets, probably 130s since I think 105s are actually harder on the chain then the 130s or maybe that was the ls6 springs? Anything I'm forgetting?

    Sent from my LG-H901 using Tapatalk

  17. #17
    GXP Level Member GTPpower's Avatar
    Join Date
    May 2008
    Location
    Schuyler, NE
    Posts
    2,316
    Chats
    255

    Default Re: Cam questions

    It is rumored that LS6 90# springs are harder on the tensioner than comp 105's. I've never noticed a significant difference.

    130's should be run with a double roller timing chain instead of a stock style.

    I would highly recommend 130's and a double roller with the xp or s1x cam. 90's or 105's with those cams are not enough. You are leaving a lot of power on the table and hurting your valvetrain.

    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
    2005 F350 6.0 - studded, deleted, bulletproofed, tuned
    1966 Olds Cutlass 442 Convertible
    2000 Chevy Silverado 2500 6.0l

  18. #18
    GTX Level Member suitercrew's Avatar
    Join Date
    Oct 2015
    Posts
    1,663
    Chats
    0

    Default Re: Cam questions

    Ok well I decided screw it, I'll have to do springs. Can I do one sides valve springs one day and then two days later do the other side or will that throw the engine off balance. If I'm going to do springs I'll do them now rather then with the cam install just so I can spread out how long the cam install will take.

    Sent from my LG-H901 using Tapatalk

  19. #19
    GXP Level Member GTPpower's Avatar
    Join Date
    May 2008
    Location
    Schuyler, NE
    Posts
    2,316
    Chats
    255

    Default Re: Cam questions

    Yeah you can do that.

    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
    2005 F350 6.0 - studded, deleted, bulletproofed, tuned
    1966 Olds Cutlass 442 Convertible
    2000 Chevy Silverado 2500 6.0l

  20. #20
    GTX Level Member suitercrew's Avatar
    Join Date
    Oct 2015
    Posts
    1,663
    Chats
    0

    Default Re: Cam questions

    Quote Originally Posted by GTPpower View Post
    Yeah you can do that.
    Thanks for talking me into man, I was hoping to not have to change springs but after more research l76 springs max at .520 lift which isn't even enough to run a vs cam. I'll probably go with the 105s though since that's what intense recommends for the s1x and since they will be easier on the chain. If I go single chain is the rollmaster or jp worth the extra money over a oem chain?

    Sent from my LG-H901 using Tapatalk

Page 1 of 10 123 ... LastLast

Similar Threads

  1. Two questions
    By tomtom123 in forum 3.8L V6 Supercharged (L67)(L32)
    Replies: 20
    Last Post: 07-23-2014, 03:56 PM
  2. Window Tint Questions and Rear Speaker Questions
    By Wisconnie in forum General Grand Prix Discussion
    Replies: 14
    Last Post: 06-22-2013, 07:17 PM
  3. Replies: 2
    Last Post: 01-30-2012, 08:40 AM
  4. Few Questions :)
    By GrandPrixSE in forum General Tech Discussion
    Replies: 3
    Last Post: 06-06-2010, 08:20 AM
  5. Alky Questions & Other Related Questions.
    By rynoman03 in forum 3.8L V6 Supercharged (L67)(L32)
    Replies: 24
    Last Post: 03-22-2010, 07:57 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •