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Quicker Throttle Response Time

This is a discussion on Quicker Throttle Response Time within the General Help forums, part of the LSx Technical Help Section category; I agree on that TB. Damn, is that filthy!!...

  1. #21
    Smiles for 9.5 Years cammed goat's Avatar
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    I agree on that TB. Damn, is that filthy!!

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    Member bhunter0830's Avatar
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    Oh trust me, it does NOT look like that any more!

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    If all else fails, just throw a supercharger on it. Clears that problem right up
    It's on jackstands.

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    Quote Originally Posted by bhunter0830 View Post
    Oh trust me, it does NOT look like that any more!
    Click for full size
    If you can get a can of Seafoam deep creep that`ll work or even a carb cleaner( Chem-tool) that and an old toothbrush will scrub that gunk away....Your T/B will love ya for it!

  5. #25
    Member bhunter0830's Avatar
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    The cost of a supercharger is more than what I paid for it and what I have in it! Doesn't mean I won't do it, just means I have to make it up to my wife with something comparable to keep her occupied while I'm doing all the work! That would definately take care of that problem. I scrubbed it with carb cleaner, tooth brush and q-tips to get it to look that good. I am pretty sure that the PCV valve was the original one from the factory. Ahhh the messes we clean up from the previous owners...

  6. #26
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    ^^ Ahh but so true ,when you get someone elses mess its that much more rewarding when you shine that rock up to a diamond.......

  7. #27
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by bhunter0830 View Post
    So, anyone have any idea's where I can start getting a quicker throttle response. There always seems to be a short delay between the petal and the response. How can I make that quicker?

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    If you want sharp throttle response (with foot movement) much like a carburator, Frost will tell you to go SD tune and remove the MAF all together.

    That's always been my complaint with these fuel injection cars,,,,always a slight delay related to throttle movement. Waiting for the IAC motor among other things. The tune does have tables with delays for the throttle for opening rate as well as closing to soften reactions and make the cars more pleasurable to drive for majority of population. I'm not sure if Frost plays with those in his tune or not (you'd have to ask him).

    But when I went to him with the same complaints his first response was "if you want it to react more like a carburator go with an SD tune".

    Since the change I've been extremely pleased.

  8. #28
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    What does it take to do a SD tune?

  9. #29
    Moderator Firebirdjones's Avatar
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    If you've had a good tune done of the VE tables already (any good tune should have that since it's the first fuel table you tune before moving onto the MAF tables),,,,then you simply remove the MAF, delete the codes and force a fail mode so the car runs soley on the VE tables. If I remember right this can be in open or closed loop.

    Then it runs on exactly what fuel you command in the tune via the VE tables only.

    Asking Frost or Orion may help to explain it better. You just have to make sure the VE tables are dialed in (with a wideband) as each car is different.

    Not sure if Frost can do these via mail order or not. I tuned my own with HPtuner with advice from both Frost and Orion. Once I got the hang of it,,,I switched all our LS vehicles to SD. I've picked up a little MPG too.

  10. #30
    Moderator 98TransAmWs-6's Avatar
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    Quote Originally Posted by Firebirdjones View Post
    Not sure if Frost can do these via mail order or not. I tuned my own with HPtuner with advice from both Frost and Orion. Once I got the hang of it,,,I switched all our LS vehicles to SD. I've picked up a little MPG too.
    He can he did mine mail order.
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  11. #31
    Member bhunter0830's Avatar
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    What is an SD tune?

  12. #32
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    Quote Originally Posted by Firebirdjones View Post
    If you want sharp throttle response (with foot movement) much like a carburator, Frost will tell you to go SD tune and remove the MAF all together.

    That's always been my complaint with these fuel injection cars,,,,always a slight delay related to throttle movement. Waiting for the IAC motor among other things. The tune does have tables with delays for the throttle for opening rate as well as closing to soften reactions and make the cars more pleasurable to drive for majority of population. I'm not sure if Frost plays with those in his tune or not (you'd have to ask him).

    But when I went to him with the same complaints his first response was "if you want it to react more like a carburator go with an SD tune".

    Since the change I've been extremely pleased.
    Ive seen in Summit catalog..i think some snap on thingamajig that they sell to quiken response time have you herad or seen them?

  13. #33
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by bhunter0830 View Post
    What is an SD tune?
    This seems to have come up alot lately?

    SD is speed density, where the engine rely's completely on the VE tables for fueling and takes the MAF out of the picture.

    - - - Updated - - -

    Quote Originally Posted by SuperSSguy View Post
    Ive seen in Summit catalog..i think some snap on thingamajig that they sell to quiken response time have you herad or seen them?
    Never heard of that. Do you have a link? What does it snap into?

  14. #34
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    Quote Originally Posted by Firebirdjones View Post
    I switched all our LS vehicles to SD. I've picked up a little MPG too.
    That's interseting right there.

  15. #35
    Member bhunter0830's Avatar
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    Well I guess that's one more thing to add to the list when I get a retune after adding a cam, larger intake and a laundry list of other things.

  16. #36
    Member SuperSSguy's Avatar
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    Quote Originally Posted by Firebirdjones View Post
    This seems to have come up alot lately?

    SD is speed density, where the engine rely's completely on the VE tables for fueling and takes the MAF out of the picture.

    - - - Updated -

    Never heard of that. Do you have a link? What does it snap into?
    I will check Summit catalog to see if i can find out more.

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