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Thread: 500 hp/550 lb-ft from a 390?
          
   
   

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  1. #46
    pat mccarthy's Avatar
    pat mccarthy is offline CHR Member/Contributor Visit my Photo Gallery
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    Quote Originally Posted by vara4 View Post
    I know they ground me a cam that ran High 9's with the linelock locked up!!!
    That was in a mustang with a 351C in it.
    They had ground me the same cam Bob Glidden was using back in 73
    when he won the world championship.
    Glidden was using a destroked 351C down to about 330 and it was not long before we found out why he destroked it. We kept cracking blocks in the lifter galley with the higher RPM's. I imagine the shorter stroke stop the craking there.
    We ended up going with a smaller cam and lowering the RPM's below 7,500 to stop the craking. I guess the destroking took alot of stress off the blocks for Glidden.
    Kurt
    my older engine builder buddy used GK cams. when you talk about cams to him harold B name would pop up . i do not know if harold in is very early days if he work at GK ? i think he did work for comp in the early 80s ?
    Irish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip

  2. #47
    Johan78 is offline CHR Member Visit my Photo Gallery
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    Just wondering one thing. Speed Pro piston is designed for connecting rods that are 6.480.
    Are they not 6.490? Maybe it doesnt matter?

    Johan

  3. #48
    techinspector1's Avatar
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    Quote Originally Posted by Johan78 View Post
    Just wondering one thing. Speed Pro piston is designed for connecting rods that are 6.480.
    Are they not 6.490? Maybe it doesnt matter?

    Johan
    When you are sitting down to engineer all the parts that will make your motor work like you want it to, you determine the static compression ratio and squish you want to use in the motor, then purchase parts to reach those specifications.

    Let's say for instance, that you wanted to achieve a squish of 0.040". OK, we know the block deck height is ~10.170", so we have to put together a stack of parts and adjust the block deck height to achieve a zero deck to do this. The thickness of the gasket then becomes the squish figure. So, with a stack of parts like this.....stroke radius 1.890", rod length nominally 6.490" (can vary from 6.486" to 6.490" in production rods) and piston compression height of 1.776", we would add all the stack pieces together and find that we have a stack of 10.156" So, in order to achieve a zero deck, we would have to shave the block decks 0.014". If the rods were actually 6.480", then the stack would be 10.146" and you'd have to cut the block decks 0.024" to achieve a zero deck.
    PLANET EARTH, INSANE ASYLUM FOR THE UNIVERSE.

  4. #49
    Flatheadwillie is offline CHR Junior sMember Visit my Photo Gallery
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    I know this forum is older than dirt...but I am another newb building a 390...just wondering why that C8AX-6250-C cam was never mentioned
    Last edited by Flatheadwillie; 04-11-2013 at 07:02 PM.

  5. #50
    EvanDef is offline CHR Junior sMember Visit my Photo Gallery
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    Quote Originally Posted by Jeff Perkins View Post
    It's been a while so no clue if there's any interest left but I've finally gotten back to this project. Work can get in the way like you just wouldn't believe. In any case, I've picked up a Comp Cams 288R roller cam/lifters/springs package, etc. and plan on providing some more timely updates.
    Hey there Jeff, I am new to this forum and your build is almost identical to mine. I too have a C6ME-A block with the same rods and a 2U crank that came out of a 67 Ranchero. The block will also find a home in a 67 Mustang coupe. I was uncertain about going the stroker route and found your post. I was wondering how you made out with the build, especially the FE and how it is running. Cheers!

  6. #51
    rspears's Avatar
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    Quote Originally Posted by EvanDef View Post
    Hey there Jeff, I am new to this forum and your build is almost identical to mine. I too have a C6ME-A block with the same rods and a 2U crank that came out of a 67 Ranchero. The block will also find a home in a 67 Mustang coupe. I was uncertain about going the stroker route and found your post. I was wondering how you made out with the build, especially the FE and how it is running. Cheers!
    Welcome to the forum! You need to take a look at the date on the thread before responding to it, if you expect any reply. Jeff posted this back in 2009, and unfortunately he has not been back in over two years according to his profile. Now that said, he may possibly get an e-mail telling him that one of his threads has a hit, if he signed up for notification. It's happened before....

    We'd love to see & hear more about that Mustang!
    Roger
    Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.

  7. #52
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    Quote Originally Posted by Flatheadwillie View Post
    I know this forum is older than dirt...but I am another newb building a 390...just wondering why that C8AX-6250-C cam was never mentioned
    After re-factoring the flow of the Edelbrock heads, based on Barry's experience with hard dyno pulls with these motors, I ran a Sim on this cam. Best results were achieved with the cam retarded 4 degrees on these 0.050" marks....
    IO (-5)
    IC (45)
    EO (52
    EC (-2)
    RPM....HP....TQ
    2000...166...436
    2500...208...436
    3000...263...460
    3500...330...495
    4000...397...521
    4500...447...521
    5000...492...517
    5500...505...482
    6000...485...425
    Peak volumetric efficiency 101.8% @5000
    Peak BMEP 198.8 lbs @4500
    PLANET EARTH, INSANE ASYLUM FOR THE UNIVERSE.

  8. #53
    slincoln 3 is offline CHR Member Visit my Photo Gallery
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    I'm new to this forum but not to Fords or the mighty FE engine. I have a 1969 Ford LTD 427 Cobra clone. It still has its 390 though its dressed up as a 427. I don't have all the specific details as I had the work done at local speed shop. It has a high lift cam,aluminum intake,700 cfm carb.,head work,electronic billet distributor,long tube headers and dynoed at 451hp. The secret to 390 is torque as its no high revving engine,get a nice gear 3:89 or 4:11,posi unit,stall 2000-2500,shift kit,sticky tires and spank some Chevy butt. I beat a ton of cars with more hp than me. I get them out the hole and they never catch me!!! I run 2200 stall and 275/60/15 Cooper Cobra's. Good luck but you won't need it!!!

  9. #54
    34_40's Avatar
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    While it's great that you replied.. the last post was almost a year ago! And you're right, the FE's were torque motors.

  10. #55
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    Quote Originally Posted by rspears View Post
    Welcome to the forum! You need to take a look at the date on the thread before responding to it, if you expect any reply. Jeff posted this back in 2009, and unfortunately he has not been back in over two years according to his profile. Now that said, he may possibly get an e-mail telling him that one of his threads has a hit, if he signed up for notification. It's happened before....
    Ditto what Mike mentioned. If you look up a three or four posts you'd have seed the above posted almost a year ago.

    Welcome to the madness, by the way!!
    Roger
    Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.

  11. #56
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    Fe

     



    Great thread !!
    Attached Images

  12. #57
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    Dang = That's Purty! Welcome to the club..

  13. #58
    Jeff Perkins is offline CHR Member Visit my Photo Gallery
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    Funny how the world works....I've spent the past two weeks revisiting this build. The bottom end is going together at the shop and I literally, just last night, drilled the lowering holes and installed the upper control arms.

    I got distracted by building a couple of businesses and a career. Believe it or not this one isn't as dead as one might think.

    I'll post a few pics at some point today, at least of the suspension. The engine assembly is being documented fairly thoroughly by the shop I engaged to do that and we'll have actual dyno numbers to look at.

    Again, how strange the world can be...

    Cheers

    Jeff
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  14. #59
    34_40's Avatar
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    Hi Ya Jeff. Yep, sometimes we are the last to know what's coming next right??
    Can't wait to see the pics.. been so long I've forgotten what the motor was going into.
    A Mustang perhaps?

  15. #60
    Jeff Perkins is offline CHR Member Visit my Photo Gallery
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    Loading pics from a phone is obviously a pain....I'll need to transfer to a computer and figure it out from there....gimme a minute...

    And yes, the car is a Mustang. 1967 Coupe.
    34_40 and stovens like this.

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