60 foot times? How to get more?

Discussion in 'Generation 4 - Performance Upgrades' started by 76FoMoCo, May 18, 2019.

  1. 76FoMoCo

    76FoMoCo SHO Member

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    I know this a bit of the secrete sauce question but I see some cars in 1.7ish and others 1.9 to 2.0.
    I have done a fair amount to my car but can not get past 1.90. I have a few ideas but this brings more questions.
    Is there a 1 and 2nd gear torque limit setting in the tunes?
    I try to boost launch with 2k the target and less than 4 second under the brake boost condition. I have 240 tread summer tires new this year but didn't change my times much. Our track is 2500' and we don't get DA much below this most of the time it's 2500 to 7000. I do have H and R's ready to go but have not run them yet.
    Any input?
     
  2. SHOdded

    SHOdded SHO Member Supporting Member

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  3. limited02

    limited02 SHO Member

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    H&R's alone will help by reducing weight transfer. Do you spin? What psi in the tires? There's also a guy making transmission mounts that should help as well by reducing driveline shock.
     
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  4. 76FoMoCo

    76FoMoCo SHO Member

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    I have run them at 30 psi and by mistake 45 psi. each timed about the same. I'm going to set them down to 25 next time. Don't know if I spin at the track or not can't hear with the windows up. It does on the street but a lot less now with the p007a's on it.

    SHOed I've read that link a few times. Thanks.
     
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  5. ridered74

    ridered74 SHO Member

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    Transmission mounts didn't change my 60' times at all, and various launch rpm's (1700-2200) didn't seem to have any effect either. I had been over 1.9 every single time until I lowered my tire pressure to 22 psi. Once I did that, I would say 90% of my trips down the track since then have been in the 1.8's. Not low 1.8's, so it didn't make THAT much of a difference, but that seems to be the only thing that has consistently gotten me 1.8's. My tires suck, so if you already have decent tires that may not help you.
     
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  6. SM105K

    SM105K Land Yacht Pilot Supporting Member

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    My best is a 1.77 stock suspension with my Continental's.

    I set my tire pressures at 26 psi in the front and 36 in the rear. You can run a higher pressure in the rear because they will not spin.

    I have a PP car so I turn off my AdvanceTrac. I do not pay attention to the RPM's when I launch. I pump the brakes hard to set the car before setting the top bulb (pre-stage) on. I start brake boosting while rolling into the staged bulbs. Hard on the brakes and more gas. I am watching boost, once the car gets into boost 1 to 2 psi.....let her eat. I am not worried about reaction time. I am only worried about making the best pass that I can.

    Yes I have hit the TQ management safety feature. I am tuned and it seems it is delayed in my car. Usually at 4 to 5 psi that is when my car noses over and doesn't go. 1 to 2 psi is the sweet spot for me. I have H&R's now, but I only have one pass on them, and the track was garbage.
     
  7. StealBlueSho

    StealBlueSho BJSHO

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    I drop the pressure in the fronts depending on track prep... I have gone down as low as 20psi up front before when prep was bad. Usually aim for 26 when I start and adjust accordingly...

    1.7x anything in these cars at full weight is really good. The majority of people hit mid 1.8x for the most part.

    FB will jump all over a 1.8x sixty foot as garbage but 95% of them don’t track their cars and the other 4% are getting 1.8’s... that 1% hit 1.7’s...

    Tires, track prep, air down, etc all play into the 60ft along with how the air is and how hot your car is...

    And the track changes during the day depending on weather and if they reprep the track and how many passes are made before reprep is done...and your air pressure changes as your tires get warm and cool down so it’s a constant adjustment/check there too.

    BAMSHO probably has the most experience out of anyone I know getting these pigs off the line, I consult him almost every time at the track...

    Best I have gotten is a 1.800 to date.


    Sent from my iPhone using Tapatalk
     
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  8. Jordan_R

    Jordan_R SHO Member

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    You need to find the sweet spot between your launch, tire pressure psi and track prep. Under inflate and you are hurting your top end. Over inflate you are hurting your sixty. Also be sure to check psi between runs. After a good run be fully expecting them to raise 3-4psi just from heating up. You need to account for all variables to optimize to the fullest.

    I usually start at about 30 and drop after a tester run if it's too bad. And if I'm lacking top end but sixty is great I'll increase pressure. You want the best of both worlds so you get the best possible time. Obviously avoid the water box also
     
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  9. ShoTim

    ShoTim Shomu the killer whale Supporting Member

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    Like others have said. You need to find the sweet spot for air pressure to track conditions. I’m usually in the mid to low 1.8’s. I’ve gone as quick as 1.77 on stock suspension. Also tires are a major factor. The best I could get on my dws’s was a 1.83. I’ve gone as low as 1.77 on the generals I run now. They are a 500 treadwear. Also it depends on how deep you are staging the car. The deeper into the stage lights you go the slower your 60 foot time will be. I barely and I mean barely flicker the stage light. I bring it up around 1700-1800 and let her eat. My car doesn’t seem to like anything over 1800 on launch.
     
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  10. 76FoMoCo

    76FoMoCo SHO Member

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    I have had better success with the 1800 rpm over the 2000. I did get a 1.88 two weeks ago. Tomorrow we will have 55* and DA in the 2500" so I'm looking to get under the 12.5 as I have had a few 12.5ish with 3300 DA. I will take my tires down to 26 psi this time.
     
  11. ShoTim

    ShoTim Shomu the killer whale Supporting Member

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    Also I run at basically sea level. If we see anything over 1200 feet it’s a terrible day.
     
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  12. 76FoMoCo

    76FoMoCo SHO Member

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  13. ShoTim

    ShoTim Shomu the killer whale Supporting Member

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  14. 76FoMoCo

    76FoMoCo SHO Member

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    FML you guys get all the good air!! now I know why all the best times come from your area! S0 I have done the DA calculator off of Wallace racing and I'm in the ball park for my DA
     
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  15. ShoTim

    ShoTim Shomu the killer whale Supporting Member

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    Yea 802sho from the other board and I both run there. We get some great air for sure. I’ve always lived with in 30 mins of the place. The surface is great as well. Your car is flying in that DA. I’m only running the same et’s as you at my da.
     
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  16. 76FoMoCo

    76FoMoCo SHO Member

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    last weekend 3000 DA and the best is a 1.90. did have lots of trouble getting staged with all the nobs.
    12.52 was all I could get
     
  17. ShoTim

    ShoTim Shomu the killer whale Supporting Member

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    I’ve gotta get off my arse and get my car ready for the track. My surgery really set back me working on the car. I know 802sho is almost ready to go as well.
     

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