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Why Cant I get into the 12sec with my car

This is a discussion on Why Cant I get into the 12sec with my car within the General Help forums, part of the LSx Technical Help Section category; so i found this DA calculator... according to our info here in houston... since we are 38' above sea level, ...

  1. #41
    its short but its skinny. jiveass's Avatar
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    pewter
    99 trans am

    so i found this DA calculator... according to our info here in houston... since we are 38' above sea level, given our current barometric pressure and humidity, our DA here is 1053.
    this calculator gives you corrected 1/4 mile times ....pretty neat...

    http://www.dragtimes.com/da-density-...ect+ET+and+MPH

  2. #42
    King 0f n00bz shady milkman's Avatar
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    blacker than wesleysnipes
    98' trans am

    Quote Originally Posted by RyanJM View Post
    I just picked up a Circle D 3200 street performance converter for $400. They have one for $725 if you see a lot of track time I may go 4 or 5 times a year so a heavier duty converter wasn't needed for a bolt on car that's getting just a cam. They also make a multi disc for like $900 or so most of my friends with cammed and nos cars run. Give them a call and tell them what you plan on using the car for and they can tell you what the best converter would be they also do restalls if you add more.mods later. My friend OS having his restalled from 3600 to 4200 for the new motor.
    they recommended a 3200 street for ya huh ? what is odd is they sent me a email saying

    "We have our 245mm 4C stall option that is a great converter for what you want. It will flash in the 3600-3800 range. It will work well for most cams in the 220 range. It will be in our Pro Series stage I, so $725."

    this is the info i gave them

    "Hey Chris looking at getting into a circle D converter..however you have a lot of options and i would like some guidance. Car will be a toy/strip car. The engine's cam and heads will be swapped to something aftermarket. The car tracks with nitto 555r 315/35/r17 and on heavy Torq Thrust Ms.


    "Vehicle Use: Street Toy
    Induction: Naturally Aspirated
    Power Adder Specs:
    n/a
    Vehicle Year: 98
    Make: Pontiac
    Model: Trans Am
    Transmission Type: 4l60e
    Trans Brake: No
    Desired Stall Range: 3600-4000
    Desired Bolt Pattern: ?
    Cam Name: stock
    Cam Duration: 202/210
    Cam Lift: 0.496" / 0.496"
    Lobe Separation:: 116
    Cubic Inch: 346
    Rear End: 3.23
    RWHP: estimated 220-230
    Tire Specs: 315/35R17
    Vehicle Weight: 3600ish"


    and i think we are basically around the same ball park arent we ?

  3. #43
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by jiveass View Post
    so i found this DA calculator... according to our info here in houston... since we are 38' above sea level, given our current barometric pressure and humidity, our DA here is 1053.
    this calculator gives you corrected 1/4 mile times ....pretty neat...

    http://www.dragtimes.com/da-density-...ect+ET+and+MPH
    The tricky part is that DA changes by the hour. In Houston with all that humidity you guys have in the summer months, I wouldn't be surprised to see your DA numbers hit 4,000 easily.

  4. #44
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by RyanJM View Post
    I just picked up a Circle D 3200 street performance converter for $400. They have one for $725 if you see a lot of track time I may go 4 or 5 times a year so a heavier duty converter wasn't needed for a bolt on car that's getting just a cam. They also make a multi disc for like $900 or so most of my friends with cammed and nos cars run. Give them a call and tell them what you plan on using the car for and they can tell you what the best converter would be they also do restalls if you add more.mods later. My friend OS having his restalled from 3600 to 4200 for the new motor.
    When I bought mine, I wasn't interested in saving a few bucks, so I sprung for the heavy duty unit with the larger lockup clutch. Even though I didn't need it according to the manufacture, (just a cam only car)
    I still liked the idea of having the bigger setup for piece of mind, and it's also able to make dyno pulls with the converter locked, something that is not recommended with the smaller unit. For another $200 I said why not.

  5. #45
    Senior Member Z28Thunder's Avatar
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    Arctic White
    2000 Z28

    Quote Originally Posted by Firebirdjones View Post
    When I bought mine, I wasn't interested in saving a few bucks, so I sprung for the heavy duty unit with the larger lockup clutch. Even though I didn't need it according to the manufacture, (just a cam only car)
    I still liked the idea of having the bigger setup for piece of mind, and it's also able to make dyno pulls with the converter locked, something that is not recommended with the smaller unit. For another $200 I said why not.
    That also makes it better for nitrous right? I know with the some of the off the shelf types Vig,TCI, etc. You can blow/burn straight throught the conveter. Meaning the converter will no longer work. The car will no longer roll forward under any throttle.

  6. #46
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by Z28Thunder View Post
    That also makes it better for nitrous right? I know with the some of the off the shelf types Vig,TCI, etc. You can blow/burn straight throught the conveter. Meaning the converter will no longer work. The car will no longer roll forward under any throttle.
    Ya, they make converters with anti-ballooning plates just for nitrous or big HP applications. I run a Coan version of this in my chevelle.
    I do believe the heavy duty lockup versions made by the various companies mentioned here also include these features, which is another reason why I wanted to upgrade mine for the 4th gen. I like overkill I guess.

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