Idle speed
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Idle speed

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    Senior Member SoldHondaBoughtHondo's Avatar
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    Default Idle speed

    It there any way to reduce the rpm difference between running in neutral and in gear? The cam i have calls for a 5k stall and 4.88 with 454-502 and i have 427 and 40's.In neutral the throttle plates

    On the trailer it will idle @ 1000, throttle plates show the transfer slot as square, idle mix screws are happy at 1 1/4 off the bottom.

    In gear on the water it takes another 1 3/4 turn of the idle speed screw and idle mix is 2-2 1/2...take it out of gear and it's about 2400.

    has them evil 660's. no power valves, secondary metering blocks. @ .080 holes in each primary throttle plate. Idle air bleeds are restricted to about .060....i think original is about .090 76 jets, acc.pump is at max...i have it set so the lever sits on the throttle shaft @idle and by half throttle there is about .050 left before the pump bottoms out....squirts are drilled to .065 and the squirt bolt is drilled to .125...been told that's way to much pump but the motor thinks it might like a little more...runs tits otherwise....I do know it like more timing.. i run locked @ 35* and 40* gets me about 1800 instead of 2400...i have ran it @43* before..just don't think it's a good idea..pump gas 11.0-1 with .020 head gaskets and one head milled .030..lol

    Thinking this might be a 'deal with' problem..i know i created it..it's like running a drag cam on the street with a stock converter...and trying to take off in third gear.......i am not above just putting an idle stop solenoid on it...sure don't like idle @ 2400 if i need to run it out of gear...
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    Quote Originally Posted by SoldHondaBoughtHondo View Post
    It there any way to reduce the rpm difference between running in neutral and in gear? The cam i have calls for a 5k stall and 4.88 with 454-502 and i have 427 and 40's.In neutral the throttle plates

    On the trailer it will idle @ 1000, throttle plates show the transfer slot as square, idle mix screws are happy at 1 1/4 off the bottom.

    In gear on the water it takes another 1 3/4 turn of the idle speed screw and idle mix is 2-2 1/2...take it out of gear and it's about 2400.

    has them evil 660's. no power valves, secondary metering blocks. @ .080 holes in each primary throttle plate. Idle air bleeds are restricted to about .060....i think original is about .090 76 jets, acc.pump is at max...i have it set so the lever sits on the throttle shaft @idle and by half throttle there is about .050 left before the pump bottoms out....squirts are drilled to .065 and the squirt bolt is drilled to .125...been told that's way to much pump but the motor thinks it might like a little more...runs tits otherwise....I do know it like more timing.. i run locked @ 35* and 40* gets me about 1800 instead of 2400...i have ran it @43* before..just don't think it's a good idea..pump gas 11.0-1 with .020 head gaskets and one head milled .030..lol

    Thinking this might be a 'deal with' problem..i know i created it..it's like running a drag cam on the street with a stock converter...and trying to take off in third gear.......i am not above just putting an idle stop solenoid on it...sure don't like idle @ 2400 if i need to run it out of gear...

    I'm not the smartest guy by anymeans, but to me I think you have an air-leak..check screws on the base-plate, to main body

  4. #3
    gn7
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    Quote Originally Posted by SoldHondaBoughtHondo View Post
    It there any way to reduce the rpm difference between running in neutral and in gear? The cam i have calls for a 5k stall and 4.88 with 454-502 and i have 427 and 40's.In neutral the throttle plates

    On the trailer it will idle @ 1000, throttle plates show the transfer slot as square, idle mix screws are happy at 1 1/4 off the bottom.

    In gear on the water it takes another 1 3/4 turn of the idle speed screw and idle mix is 2-2 1/2...take it out of gear and it's about 2400.

    has them evil 660's. no power valves, secondary metering blocks. @ .080 holes in each primary throttle plate. Idle air bleeds are restricted to about .060....i think original is about .090 76 jets, acc.pump is at max...i have it set so the lever sits on the throttle shaft @idle and by half throttle there is about .050 left before the pump bottoms out....squirts are drilled to .065 and the squirt bolt is drilled to .125...been told that's way to much pump but the motor thinks it might like a little more...runs tits otherwise....I do know it like more timing.. i run locked @ 35* and 40* gets me about 1800 instead of 2400...i have ran it @43* before..just don't think it's a good idea..pump gas 11.0-1 with .020 head gaskets and one head milled .030..lol

    Thinking this might be a 'deal with' problem..i know i created it..it's like running a drag cam on the street with a stock converter...and trying to take off in third gear.......i am not above just putting an idle stop solenoid on it...sure don't like idle @ 2400 if i need to run it out of gear...
    Whew, first post I ever read that had more info that you could possibly need. I know you're smart enough to know that the accel pumps have shit to do with your idle problem, but the info is there just in case

    Welcome to the world of big time camshafts.
    "I have a adv duration of 315 intake and want to kn ow if I can get it to idle like my gramps caddy.?"
    Maybe Beer will come on and tell you to install a 9000.00 EFI system complete with driver auto suck.

    There is always the electric solenoid dash pot on a switch like whimpy 4 cylinder cars with A/C had before EFI and ECMs.

    Big cams and low compression is the culprit.



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    Last edited by gn7; 03-02-2013 at 10:10 PM.

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