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4.0 OHV into 4.0 24v COSWORTH

Discussion in 'Need for Speed!' started by Tobbe, January 13, 2007.

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    1. Tobbe

      Tobbe New Member

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      The headgasket assembly.
      [​IMG]

      [​IMG]

      The copper fire-rings are still missing
       
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    3. Tobbe

      Tobbe New Member

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      Did some work on it yesterday.

      [​IMG]

      [​IMG]

      [​IMG]

      [​IMG]

      If someone got a set of SOCH rods for sale let me know, I really need them I think...
       
    4. RealBIG

      RealBIG New Member

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      You must be kidding?
       
    5. Tobbe

      Tobbe New Member

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      Wise guy, I don't need that kind of posting....

      I recently found out that they are no stronger then the ohv ones. I am not familiar with the SOCH at all, never seen one, I've just heard that it was supposed to have better internals. Got some other stronger rods now. But I would like to buy a SOCH oil pan and oil pick up...... And I am not kidding.....
       
    6. Fredness

      Fredness Elite Explorer

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      He means about the spelling...

      It's Single Over-Head Cam or SOHC... but the rest of us know what you mean.
       
    7. 410Fortune

      410Fortune ELITE BRONCO2ERER Moderator Emeritus

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      I think what he meant is the SOHC doesnt use push rods

      "rods" in this case likely doesnt refer to rocker arm pushrods.

      Be careful when using SOHC internals in the OHV the pistons will really increase the compression ratio, I dont know all the details but its something to research

      the SOHC oil pan and windage tray have main bearing supports built in for the block I believe, you will need the pan and pickup tube, not sure what else is needed to bolt it on if anything
       
    8. hotweyer

      hotweyer New Member

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      SOHC parts

      Hi tobbe,
      just ran acrossed your post and I really nead to chat.
      I have been working on a cosworth SOHC combination for over two years and
      love to see others with the same interest.If there is any parts or info I can help you with send me a e-mail or post a reply.
       
    9. Rick

      Rick Pumpkin Pilot Staff Member Admin Elite Explorer

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      It's great to see someone thinking out of the box Tobbe. Can't wait to hear how it all works out for you.

      Good luck with the project:chug:
       
    10. hotweyer

      hotweyer New Member

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      cosy stuff

      Thank's for getting back to me.
      I am kinda slambed at the shop today so I dont have time to chat right now .
      I will deffinitely be in touch.I have alot of questions.
       
    11. Tobbe

      Tobbe New Member

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      Got me a set of these,
      [​IMG]
      And I have also increased the bore a bit.......
       
    12. hotweyer

      hotweyer New Member

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      cosy stuff

      Hey Tobbe,
      Thats great you got the rods,They look like an Eagle H beam.The loook plenty strong but a little heavy.The rods I have been using are I beam C&A,
      about 540 grams.We have the made special and are about 120.00 a rod.US.
      It,s great you have the pieces to move forward on your project.Would really like to see it come together and what kind of HP you get out of it.I am still working on the BOA setup But am finding out why The BOB heads are the better choice.I picked up the PushRod block because of how many changes we would of had to make to the heads to make them work on a SOHC block.
      If I get a hold of your friend I will be better off than if I try to get more parts and info from Cosy.
       
    13. jwrezz

      jwrezz Elite Snow Shoveler Elite Explorer

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      subscribing. This is way too cool not to keep up on!
       
    14. Tobbe

      Tobbe New Member

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      Getting closer every day now:D

      [​IMG]

      The rods are Procomp 6" for chevy SB, modified to accept ford crank and rod bearing and also a 24.005mm wrist pin (not stock pin).

      The wrist pin is custom made out of 4340 steel, 61-62 HRC hard.... (try to kill it with a hammer and you'll see which of them will break first;) )

      The piston is of own design, cr 10:1

      Cory, I won't be reving much more then 6000rpm so Don't worry about the weight, the engine will be boosted in the future so the bottom end is be built for that. There is enought material in the piston heads to decrease the CR.... By the way, was Dave able to help you?
       
    15. Tobbe

      Tobbe New Member

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    16. Halfnuts

      Halfnuts Active Member

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      Are those lifters in the top pic, or just dummies installed for the purpose of filling the holes? I thought this was a DOHC project...:p:
       
      Last edited: June 17, 2007
    17. lowfomoco

      lowfomoco New Member

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      hey tobbe, this is a cool project! I wish you luck with it! I wonder about the oil pump issue, have you solved that yet? If so, I guessed I missed it, but if not< why not a dry sump set up? A pump driven by the accessory belt with hoses routed to the vital stuff? Just a thought. Keep up the great work.

      roe
       
    18. CDW6212R

      CDW6212R Hauls the mail. Elite Explorer

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      Great project, I wish you well with it. I'd love tobe able to start another project, that's a good one.

      I've got a 99 SOHC Explorer that I've gone through the timing chain issues. If the Cosworth valvetrain is as reliable as I would think, no one should consider the SOHC valvetrain.

      I would much prefer to attempt using the SOHC block, or at least the balancer/dampner, to be able to use the SOHC PCM. The OBDII operating system is much much better than what came on early 4.0's. What level of operating system does the Cosworth use, I read mention of it, but I haven't heard anything about it?

      Is it a sequential port fuel injection, mass air instead of speed density? I gather that there is a distributor also. Anotherwords, would it be beneficial, or too much trouble, to get the SOHC PCM to manage the engine? There are excellent programmers who can tune these later model PCM's in any application, from NA to supercharged. The transmission functions can be elliminated/ignored if needed.

      This is great stuff, I love engine parts swapping. What difference is there in the bores? Have you opened up the head chambers to match the 4.0 block? I'd want the compression under 9.5 for future supercharging. Regards,
       
    19. Tobbe

      Tobbe New Member

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      Finally, I've assembled the engine and filled her up with oil:D And made some tests and everything looks really good........
       
    20. ajr2000

      ajr2000 Active Member

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      Pics!!
       
    21. dkchrist

      dkchrist Well-Known Member

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      congrats on getting this thing done
       
    22. hotweyer

      hotweyer New Member

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      Hi Tobbe,
      Just checking to see if you have any update info on your 4.0 cosworth engine project.
       
    23. hotweyer

      hotweyer New Member

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      Hi Tobbe,
      Got any new info on the engine.
       
    24. OldRedB2_84

      OldRedB2_84 Member

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      i cant wait to see this thing run!
      that 4.0 is gonna haul a$$.
      good job
       
    25. CDW6212R

      CDW6212R Hauls the mail. Elite Explorer

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      Well figure the rpm range, what is the rpm range of the little DOHC engine? Then multiply that by the size of the engine, and divide by 4.0 liters. That will give you the new rpm range of the resultant 4.0 DOHC engine, using the DOHC cams. That should be very good compared to the SOHC 4.0 engine.
       
    26. Tobbe

      Tobbe New Member

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      I blew the clutch when I was out on the road mapping it.. I managed to drive it 400km, and I can say that when everything is tuned in, it will run pretty nice....... It's bloody strong......

      I estimate I will be back on the road in april with it..... Got a much stronger clutch now:D
       

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