Foxwell Motorsports 063 oval iron head dyno results
+ Reply to Thread
Page 1 of 2 1 2 LastLast
Results 1 to 14 of 27

Thread:
Foxwell Motorsports 063 oval iron head dyno results

  1. #1
    steelcomp was here
    Join Date
    Dec 2007
    Location
    n/e TN
    Posts
    26,280

    Default Foxwell Motorsports 063 oval iron head dyno results

    Finally got some results on these from the customer but it doesn't really tell the whole story. The engine was chassis dyno'd before and after and according to the dyno, we put almost 100hp to the rear wheels, all things considered, but I know this is short of what's actually there.
    These went on a 427 in a 69 Impala for a customer in NY with a FM ported Vic Jr and a Straub 3 lobe hyd. roller cam, and I also set the valve train up at my shop. The engine was wheel-dyno'd before the changes at 423 rwhp and the conditions that day were 67*, 13% humidity, 29.51 baro. The ported heads, intake and cam netted a gain of 65 rwhp with a best pull of 488 rwhp with conditions of 90.6* 33% humidity and 29.69 baro. On the first tesst they were also using a fan through the hood scoop which they said was worth 6hp; they didn't do that on this test. Given the differences in conditions I'd say we could be looking at possibly a "corrected" ~85 rwhp gain. That would be 508 rwhp X 1.2 = ~610 @ the crank. The problem lies in the fact that the dyno shows the engine peaking at 6200rpm and going pancake flat to 6900. We know for a fact that this engine is not making peak power at 6200rpm...more like 6800-6900 and closer to 670hp @ the crank. It's either a converter problem, or the tires are spinning, but none the less.
    Click on the pic below and listen. This thing is pissed off!




    Last edited by scott foxwell; 09-09-2012 at 06:07 PM.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member EVILFORCE's Avatar
    Join Date
    Oct 2009
    Posts
    5,180

    Default

    Sounds about as good as it gets. Nice work.
    No Fool Like A Old Fool is there?

  4. #3
    Member
    Join Date
    Jul 2012
    Posts
    54

    Default

    Quote Originally Posted by steelcomp View Post
    a Straub 3 lobe hyd. roller

    That is the key thing most people wont read so i thought i would point it out..

    Funny how things come back over time. And still work


    Nic

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Gone in a Flash! Speed of Heat's Avatar
    Join Date
    Dec 2007
    Location
    Lake Pend Oreille, Idaho
    Posts
    219

    Default

    Care to go into more detail about the "3 lobe cam"? I searched the topic and didn't find much?
    Remember that the Ark was built by amateurs and the Titanic was built by professionals.

  7. #5
    Member
    Join Date
    Jul 2012
    Posts
    54

    Default

    Quote Originally Posted by Speed of Heat View Post
    Care to go into more detail about the "3 lobe cam"? I searched the topic and didn't find much?

    Cstraub will be on in the morning. Maybe he will go into detail. But usually it's done to equalize all the cylinders.

  8. #6
    gn7
    gn7 is offline
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,975

    Default

    I'd rather hear what nicwood knows
    Like who first ground a cam with multiple lobe profiles and for what engine.



    100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3

  9. #7
    Member
    Join Date
    Jul 2012
    Posts
    54

    Default

    Quote Originally Posted by gn7 View Post
    I'd rather hear what nicwood knows
    Like who first ground a cam with multiple lobe profiles and for what engine.
    Let's just put this into perspective. Im 24 years old. The 3 and 4 and every lobe ground differnt thing was going on long before me. "Flat head days"

  10. #8
    steelcomp was here
    Join Date
    Dec 2007
    Location
    n/e TN
    Posts
    26,280

    Default

    Quote Originally Posted by nicwoods6 View Post
    That is the key thing most people wont read so i thought i would point it out..

    Funny how things come back over time. And still work


    Nic
    I knew there would be a few to catch it. Under certain circumstances it sure can make a difference.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

  11. #9
    gn7
    gn7 is offline
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,975

    Default

    Quote Originally Posted by nicwoods6 View Post
    Let's just put this into perspective. Im 24 years old. The 3 and 4 and every lobe ground differnt thing was going on long before me. "Flat head days"
    I know you're young, but you working in a place drowning in history
    Clay Smith was the first(that is known) to grind a multi lobe cam, yes for a flathead. Mainly due to its EXHAUST, not the intake like you would do on a BBC. He also ground cams for SBC that had a as many as 16 lobes, more as an exercise than anything else.
    It would be pretty hard for someone to have done it before him. there just was that many who could have beat him. Maybe some European auto engineer working for Mercedes or Fiat, but here I am pretty sure Smith did it first. I was also the first to mess with individual ignition timing for each cylinder as well.



    100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3

  12. #10
    steelcomp was here
    Join Date
    Dec 2007
    Location
    n/e TN
    Posts
    26,280

    Default

    Quote Originally Posted by Speed of Heat View Post
    Care to go into more detail about the "3 lobe cam"? I searched the topic and didn't find much?
    Nick is right. With conventional BB Chev heads, there is a "good" intake port (right turn) and a "bad" intake port (left turn). These two ports have completely different flow characteristics and while most aftermarket heads have a much better balance between the two, these older iron heads can have a pretty big spread even after porting. One way to address this is to use a cam with two different intake lobes, each designed for the different port's requirements. A little more lobe on the bad port helps bring it in line with the good port and makes the engine much more balanced instead of acting like two different four cyl. engines running on the same crank.
    Hope that helps.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

  13. #11
    steelcomp was here
    Join Date
    Dec 2007
    Location
    n/e TN
    Posts
    26,280

    Default

    Quote Originally Posted by nicwoods6 View Post
    Let's just put this into perspective. Im 24 years old. The 3 and 4 and every lobe ground differnt thing was going on long before me. "Flat head days"
    You have a tremendous opportunity that lies ahead of you. I'm really rootin' for ya.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

  14. #12
    gn7
    gn7 is offline
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,975

    Default

    Quote Originally Posted by steelcomp View Post
    You have a tremendous opportunity that lies ahead of you. I'm really rootin' for ya.
    And a lot of history and some big azz shoes to fill
    Pete Betrand, Clay Smith, Red Wilson, George Striegel. Yeah, I wouldn't mind having my name hanging end of those



    100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3

  15. #13
    Member
    Join Date
    Jul 2012
    Posts
    54

    Default

    Quote Originally Posted by gn7 View Post
    And a lot of history and some big azz shoes to fill
    Pete Betrand, Clay Smith, Red Wilson, George Striegel. Yeah, I wouldn't mind having my name hanging end of those

    Thanks guys very kind of you.
    But let's not high jack this post.
    Steel and Chris sounded like they did a good job here.
    Wish it could have been done on a flywheel dyno.
    Doesnt the motor have to come out with the tranny?? Lol
    Maybe you can mount it on a dyno then?? And rev it up??

  16. #14
    steelcomp was here
    Join Date
    Dec 2007
    Location
    n/e TN
    Posts
    26,280

    Default

    Quote Originally Posted by nicwoods6 View Post
    Thanks guys very kind of you.
    But let's not high jack this post.
    Steel and Chris sounded like they did a good job here.
    Wish it could have been done on a flywheel dyno.
    Doesnt the motor have to come out with the tranny?? Lol
    Maybe you can mount it on a dyno then?? And rev it up??
    Thanks. Chris and I seem to be able to put together some decent combinations.
    Wishful thinking on the engine dyno. It'll be back on the track next weekend if all goes right. That's going to tell us a lot. It should pull hard through 7K and put that big ol' thing in the tens.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

+ Reply to Thread
Page 1 of 2 1 2 LastLast

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Please select your insurance company (Optional)

Log-in

Tags for this Thread

Digg This Thread

Posting Permissions

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

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95