how much top end>>

Discussion in 'Performance Modifications' started by NO HEMI, Jul 3, 2013.

  1. Richard Koch

    Richard Koch Enthusiast

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  2. 345s-bspinnin

    345s-bspinnin Viper Owner

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    5th gear on a Gen III and early Gen IV pull till 225mph, well past the drag limited topspeed. Journalist who shift into 6th in a Viper don't know how to drive. Even on a new Viper, 5th gear is good to well past 175mph!

    Changing a lower final gear still doesn't make 6th gear a usable gear unless you go way extreme. Remember that gearing multiplies engine torque up or down. A stock 5th gear and final will multiply engine torque by 2.24x (.73x3.07). If you go with a rock crawling 4.56, you can barely make more usable that the OEM 5th since the final torque multiply level is 2.28 (.5x4.56). If you go that extreme, your 1-5 will be useless.
     
  3. NO HEMI

    NO HEMI Viper Owner

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    @ Richard Koch, congrats on the run, did you do it in 5th or did you shift to 6th?.
     
  4. 345s-bspinnin

    345s-bspinnin Viper Owner

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    Great job on the 175.3mph pass. The car looked nice and solid. That 3.55 gear is perfect for your power level and this event.
     
  5. Richard Koch

    Richard Koch Enthusiast

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    I ran it in 5th gear and was at 5,700 rpm when I went through the traps. I still had a few rpm left and perhaps if I had made a better launch I could have coaxed a couple of more mph out of the old girl.
     
  6. TrackAire

    TrackAire Viper Owner

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    Nice run!! Don't worry about the launch, really won't make much difference at all on mile plus runs with your hp level. The only time it will matter is if you're racing side by side and the first one to cross the line wins. Your speed will pretty much be the same through the traps.

    Cheers,
    George
     
  7. BAD BOYZZ GARAGE

    BAD BOYZZ GARAGE Enthusiast

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    Good solid run!!

    Loved the hell out my GTS, makes me want to build another one with a Gen 4 under the hood..:D

    Bad Boyzz Garage:usa:
    Toddy
     
  8. Camfab

    Camfab Viper Owner

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    I'm interested in this event, well the mile not the mile and a half you did. Did they put you in the SSE catagory for tech inspection. I'm assuming you have no cage. I think it would be fun, but I don't want to cage the car. Maybe they would give me an exception due to the factory five point system on the ACR's.
     
  9. 345s-bspinnin

    345s-bspinnin Viper Owner

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    It would be nice to see another heads/cam car out there. I was allowed to run pretty fast on my vert with only a autoform roll bar and 6pt harness.
     
  10. Camfab

    Camfab Viper Owner

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    I guess I should give them a call and see what they have to say. From an appearance stand point my car looks stock other than a set of headers. It's not as though I don't care about safety, because I certainly due, It's just the fact that putting a cage in the car pretty much sends it over the originality ship. Nothing I've done to the car can't be reversed. Other than the fact that I did the nutsert mod for the sidesills, the car has never seen anything drilled, cut, no wire splices, nothing. Anyway besides that my main concern is what the GTS feels like at highspeed. My car sits a bit high all around, I'm wondering if I'd have to lower the car as a precaution as well (minimizing lift).

    Was your run basically Rookie run + 1 pass. If so, how fast did they allow you to go.
     
  11. 345s-bspinnin

    345s-bspinnin Viper Owner

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    Not quite rookie. I have ran the standing miles for a few years ago. For my first run back in 2010, I only had stock safety system and ran +176mph on my headers/tune Gen III. We were limited to 190mph on OEM safety equipment. I added my roll bar and other equipment in late '11 for my 2012 run were I knew I would encroach on +190mph (ran 191.5mph that time)

    The Texas Mile imposed a new licencing system just last year. I forget the exact details, but basically you do a run below 165, then less than 190, then I was allowed to run in the 190-215mph category. The aforementioned applied to driver only. As for the car, I was allowed to run in the 190-215 class after I added a roll bar, 6 pt harness, and full racing attire (racing suit, shoes, gloves, arm restraints [b/c vert]. Other basic safety equipment like Y rated tires, fire extinguisher, etc. were already on the car.
     

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