Dynapack, Am I safe.
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Dynapack, Am I safe.
I'm running time trials this weekend and completely forgot I need a dyno sheet for classing. I spent a day going back and forth to RWD last time, not going for that this time.
Is my car safe on a dynapack (assuming there is one in atlanta somewhere)
I could care less about the output, actually, the lower the better. I'm not even close to max spec in my class so it's not a worry.
Is my car safe on a dynapack (assuming there is one in atlanta somewhere)
I could care less about the output, actually, the lower the better. I'm not even close to max spec in my class so it's not a worry.
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dont know the answer to your question and not to go OT since I almost pm'ed ya anyway but what class is your car in NASA TT?
I am going to run the Florida ones, especially Sebring, and I cant figure out how to class my car.
You HAVE to have a dyno sheet?
What about mods. Cant I just tell them hey my car weights 3200 pounds and has about 600hp? what would that put me up against??
thanks for the info cause I will be doing this down here!!
I am going to run the Florida ones, especially Sebring, and I cant figure out how to class my car.
You HAVE to have a dyno sheet?
What about mods. Cant I just tell them hey my car weights 3200 pounds and has about 600hp? what would that put me up against??
thanks for the info cause I will be doing this down here!!
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Ok here goes.
Simple Explanation
You dont HAVE to bring a Dyno sheet, it's only relevant if you want your "real" class record or are trying to gather points for nationals which you would still do, but in the next class up from where you should be which is TTU (so you'd be in TTR). TTR is completely unlimited, formula cars, full race cars etc. But at this point there isnt really any big competition in that class so most times the TTU class will have more competition and faster times. Cars with no sheets go directly to TTR.
Not so simple explanation
The classing for TTU, which is what you would be in is based on Weight/hp ratio. The TTU minimum is 5.5:1 ratio. So race weight includes you, and hp is at the wheels. The only other penalties are for tires, full slicks give you a .75 penalty and AWD .5 penalty (worst penalty ever). I take it you are about 170 lbs and making about 530 at the wheels (dynojet) . So divide total weight 3370 by whp 530 and that gives you 6.3, now subtract the .5 stupid penalty and you're at 5.8.
That's it. If you go RWD you can add full slicks and be close to the limit. But remember cup cars are in TTU, and the classing system is pretty loose, so it's integrity based right now. There is a certain corvette up here running 620 whp and 2900 lbs raceweight (from what I've heard) in TTU (you do the math), so I doubt you have any worries.
So get a Dyno run TTU, dont get a dyno and run TTR.
Simple Explanation
You dont HAVE to bring a Dyno sheet, it's only relevant if you want your "real" class record or are trying to gather points for nationals which you would still do, but in the next class up from where you should be which is TTU (so you'd be in TTR). TTR is completely unlimited, formula cars, full race cars etc. But at this point there isnt really any big competition in that class so most times the TTU class will have more competition and faster times. Cars with no sheets go directly to TTR.
Not so simple explanation
The classing for TTU, which is what you would be in is based on Weight/hp ratio. The TTU minimum is 5.5:1 ratio. So race weight includes you, and hp is at the wheels. The only other penalties are for tires, full slicks give you a .75 penalty and AWD .5 penalty (worst penalty ever). I take it you are about 170 lbs and making about 530 at the wheels (dynojet) . So divide total weight 3370 by whp 530 and that gives you 6.3, now subtract the .5 stupid penalty and you're at 5.8.
That's it. If you go RWD you can add full slicks and be close to the limit. But remember cup cars are in TTU, and the classing system is pretty loose, so it's integrity based right now. There is a certain corvette up here running 620 whp and 2900 lbs raceweight (from what I've heard) in TTU (you do the math), so I doubt you have any worries.
So get a Dyno run TTU, dont get a dyno and run TTR.
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Ok here goes.
Simple Explanation
You dont HAVE to bring a Dyno sheet, it's only relevant if you want your "real" class record or are trying to gather points for nationals which you would still do, but in the next class up from where you should be which is TTU (so you'd be in TTR). TTR is completely unlimited, formula cars, full race cars etc. But at this point there isnt really any big competition in that class so most times the TTU class will have more competition and faster times. Cars with no sheets go directly to TTR.
Not so simple explanation
The classing for TTU, which is what you would be in is based on Weight/hp ratio. The TTU minimum is 5.5:1 ratio. So race weight includes you, and hp is at the wheels. The only other penalties are for tires, full slicks give you a .75 penalty and AWD .5 penalty (worst penalty ever). I take it you are about 170 lbs and making about 530 at the wheels (dynojet) . So divide total weight 3370 by whp 530 and that gives you 6.3, now subtract the .5 stupid penalty and you're at 5.8.
That's it. If you go RWD you can add full slicks and be close to the limit. But remember cup cars are in TTU, and the classing system is pretty loose, so it's integrity based right now. There is a certain corvette up here running 620 whp and 2900 lbs raceweight (from what I've heard) in TTU (you do the math), so I doubt you have any worries.
So get a Dyno run TTU, dont get a dyno and run TTR.
Simple Explanation
You dont HAVE to bring a Dyno sheet, it's only relevant if you want your "real" class record or are trying to gather points for nationals which you would still do, but in the next class up from where you should be which is TTU (so you'd be in TTR). TTR is completely unlimited, formula cars, full race cars etc. But at this point there isnt really any big competition in that class so most times the TTU class will have more competition and faster times. Cars with no sheets go directly to TTR.
Not so simple explanation
The classing for TTU, which is what you would be in is based on Weight/hp ratio. The TTU minimum is 5.5:1 ratio. So race weight includes you, and hp is at the wheels. The only other penalties are for tires, full slicks give you a .75 penalty and AWD .5 penalty (worst penalty ever). I take it you are about 170 lbs and making about 530 at the wheels (dynojet) . So divide total weight 3370 by whp 530 and that gives you 6.3, now subtract the .5 stupid penalty and you're at 5.8.
That's it. If you go RWD you can add full slicks and be close to the limit. But remember cup cars are in TTU, and the classing system is pretty loose, so it's integrity based right now. There is a certain corvette up here running 620 whp and 2900 lbs raceweight (from what I've heard) in TTU (you do the math), so I doubt you have any worries.
So get a Dyno run TTU, dont get a dyno and run TTR.
Heavy,
I have to say I really learned a lot reading this thread (not a joke, dead serious). Thanks. And thanks for your posts in my thread on swaybars..... it helps a lot to read this and learn about things.
JB
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The Dyno Dynamics in my area is not mechanically linked. I'd really prefer a dyno dynamics as the numbers are lower, and in ths game, lower is better. The closest mustang is in Alabama I think. Not so great.
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No problem bro, I like giving help when I can. As you learn you'll find it invigorating to help people along as they are learning. Good luck and make sure to post back with your results. We all can use them for the archives of info we are building here in the TT section.
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HC for your purposes - single pull for track classification - you should be able to get away with it. The Mustang and DD will give the lower #'s. The thing to avoid is multiple long pulls for tuning which may cook the center diff
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Hoping you guys think about a Sebring road trip!!
