Page 1 of 3 123 LastLast
Results 1 to 10 of 21

Thread: 4 Bolt Main Conversion

  1. #1
    Forum User Feedback Score 0
    Join Date
    Sep 2010
    Owner Since
    2001

    Location
    St Joe
    Posts
    120
    Thanks
    5
    Thanked 29 Times in 9 Posts

    4 Bolt Main Conversion

    Hey guys, I was talking to Matt from DR today and i realized I needed some more information.

    I am putting a 4 bolt main built engine (pics will follow in a few weeks) into my 91 RT TT. What are the differences in parts/procedures that I need to be aware of? thanks

    Edit: To answer my own question I did some digging and found these sites:
    http://www.stealth316.com/2-2bolto4bolt.htm

    http://www.wrenchmonkey.com/Webpages/4bolt.html

    However if you have any more information you'd like to add feel free!
    Last edited by Fakepower; 09-30-2010 at 10:06 PM.

  2. #2
    Why? Because Race Car. verified Feedback Score 0 akotten's Avatar
    Join Date
    Sep 2010
    Owner Since
    2005

    Location
    Wichita, KS
    Posts
    445
    Thanks
    11
    Thanked 16 Times in 9 Posts
    Something I should consider during this next rebuild...In for more info from people that have actually done this.
    91 R/T TT
    Mods: RC 550s, Stillen Downpipe, Stillen Cross-Drilled Rotors, HKS Exhaust, HKS VPC, HKS EBC, HKS Turbo Timber, HKS Twin Power, HKS SSQV BOV, HKS SMIC, HKS Fuel Pump, Wiseco Pistons, 3SX Rods, Ferrera SS Valves, 3rd Gen Lifters, 15G Turbos, Centerforce Dual Friction Clutch, B&M FMOC, Unorthodox Racing Underdrive Pulley, EGR blockoff.

  3. #3
    Forum User Feedback Score 0
    Join Date
    Sep 2010
    Owner Since
    2001

    Location
    St Joe
    Posts
    120
    Thanks
    5
    Thanked 29 Times in 9 Posts
    well to be honest the only reason to do this is if you get a block cheap. Throw a new forged crank in the 2 bolt. I think IPO has made around 800hp on a 2bolt main using the ARP 2 bolt main kit from 3sx.

  4. #4
    Forum User Feedback Score 0 1stStealthN/A's Avatar
    Join Date
    Sep 2010
    Owner Since

    Posts
    73
    Thanks
    5
    Thanked 2 Times in 2 Posts
    I did the John Monin 4 bolt swap but it's overkill for me. Two bolt with a forged crank would have been fine.

  5. #5
    Twin Turbo verified Feedback Score 5 (100%) GTOJOE's Avatar
    Join Date
    Sep 2010
    Owner Since
    2007

    Location
    Melbourne, Australia
    Posts
    2,155
    Thanks
    79
    Thanked 92 Times in 76 Posts
    what is required if I drop a 4 bolt engine in my 1st gen that currently has a 2 bolt. Alternatively what is required fi I drop the complete 2nd gen setup in my car? I kow what is needed for drive train etc so just engine wise is there anything required? As far as I know th only difference is the CAS????
    1990 JDM GTO TT with Vi-PEC plug-in V44 EMS, TD04-13T's, 3SX Downpipe, MP Hi-flow cat, ARC SMIC's, Aeromotive Stealth 340LPH pump, Fuelab 515 FPR, Ninja Performance 75amp hotwire kit, oohnoo fuel loop & rail adapters, Nylon braided ethanol fuel line, NGK AFX Wideband, K&N FIPK, Iridium plugs, HKS Twin Power DLI, Turbo XS racing BOV, 3SX poly mounts, Custom 280km/h speedo.

    Waiting install
    Injector Dynamics 725cc Injectors.

    Build Thread

  6. #6
    I AM IMPORT POWER Feedback Score 1 (100%)
    Join Date
    Sep 2010
    Owner Since
    2001

    Location
    Driving Vicki Crazy
    Posts
    1,457
    Thanks
    58
    Thanked 281 Times in 134 Posts
    All you need for a 2 bolt to 4 bolt is

    4 bolt block
    4 bolt oil pan
    4 bolt oil pump
    4 bolt Alt/AC to oil pump bracket
    4 bolt Timing cog OR re mark a 2 bolt, the timing mark on a 4 bolt oil pump is moved versus the mark on a 2 bolt pump

    Of course, you could make over 700AWTQ and 800AWHP on a 2 bolt, so unless you are trying to make HUGE power, don't worry about it.

    -Chris

  7. The Following User Says Thank You to Ninja Performance For This Useful Post:


  8. #7
    Forum User Not Verified
    supporter
    Feedback Score 6 (100%)
    Join Date
    Sep 2010
    Owner Since
    2004

    Location
    Cape Girardeau
    Posts
    4,850
    Thanks
    363
    Thanked 296 Times in 215 Posts
    Quote Originally Posted by Import Power View Post
    All you need for a 2 bolt to 4 bolt is

    4 bolt block
    4 bolt oil pan
    4 bolt oil pump
    4 bolt Alt/AC to oil pump bracket
    4 bolt Timing cog OR re mark a 2 bolt, the timing mark on a 4 bolt oil pump is moved versus the mark on a 2 bolt pump

    Of course, you could make over 700AWTQ and 800AWHP on a 2 bolt, so unless you are trying to make HUGE power, don't worry about it.

    -Chris
    aren't the transmission stays and oil returns slightly different?

    Parting 6 speed
    Pampena 3.5 Stroker, TiAL DR750s, AEM Series2, oohnoo SMIC, DN Hardpipes, ID1000s, Walbro 416/485, aermotive fpr, Dejon intake pipes, Tial QR, DN Precats, 3sx Single Pass Rad, Samco Hoses, Stoptech 332mm fronts, Tein S-Techs, Bilstein HDs, Spec 4+, JDM 6 Speed, Billet shift forks, Pampena brace

  9. #8
    1st ever COTM and COTY verified Feedback Score 9 (100%) green-lantern's Avatar
    Join Date
    Aug 2010
    Owner Since
    Birth

    Location
    Tennessee
    Posts
    7,254
    Thanks
    652
    Thanked 459 Times in 354 Posts
    Quote Originally Posted by Import Power View Post
    All you need for a 2 bolt to 4 bolt is

    4 bolt block
    4 bolt oil pan
    4 bolt oil pump
    4 bolt Alt/AC to oil pump bracket
    4 bolt Timing cog OR re mark a 2 bolt, the timing mark on a 4 bolt oil pump is moved versus the mark on a 2 bolt pump

    Of course, you could make over 700AWTQ and 800AWHP on a 2 bolt, so unless you are trying to make HUGE power, don't worry about it.

    -Chris
    Oh crap! I didn't do this. Is a 95 two blot NA cog different also? I was wondering why my marks didn't match up. I was thinking the heads might have been decked too many times or something. When all of the heads where lined up then the cog was off a little bit but not a full tooth.

    Edit: I also used the bracket off my NA. I had posted a thread about it but didn't get any responses. I did make it work but I had to do some shimming or something like that to get it to work.
    Last edited by green-lantern; 10-04-2010 at 07:48 PM.

    Quote Originally Posted by HilbillyHomeboy View Post
    I bet she smells of old mustard and sawdust.
    Jeremy

  10. #9
    Forum User Feedback Score 0 1stStealthN/A's Avatar
    Join Date
    Sep 2010
    Owner Since

    Posts
    73
    Thanks
    5
    Thanked 2 Times in 2 Posts
    Quote Originally Posted by Forest Gump View Post
    aren't the transmission stays and oil returns slightly different?
    Yep, the stays are different, oil returns are okay. Also need 2nd gen timing belt cover.

  11. #10
    I AM IMPORT POWER Feedback Score 1 (100%)
    Join Date
    Sep 2010
    Owner Since
    2001

    Location
    Driving Vicki Crazy
    Posts
    1,457
    Thanks
    58
    Thanked 281 Times in 134 Posts
    Quote Originally Posted by 1stStealthN/A View Post
    Yep, the stays are different, oil returns are okay. Also need 2nd gen timing belt cover.
    Agreed.

    -Chris

Page 1 of 3 123 LastLast

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
  •  
3000GT / Stealth / GTO Resources
3000GT / Stealth / GTO / Multi-site Classifieds
3000GT/Stealth/GTO Event Pages
3S National Gathering
East Coast Gathering
Upper Mid-West Gathering
Blue Ridge Gathering
3000GT/Stealth/GTO Clubs and Groups
Michigan 3S
MInnesota 3S
Wisconsin 3S
Iowa, Nebraska, Kansas 3S
North California 3000GT/Stealth
United Society of 3S Owners
3000GT/Stealth/GTO Forums
3000GT/Stealth International
3000GT/Stealth/GTO Information and Resources
Team 3S
3000GT / Stealth / GTO Information
daveblack.net
The 3000GT/Stealth/GTO Web History Project
3000gt.com
3000GT / Stealth International WWWboard Archive