How much rear wheel HP for 10's?
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Then I'm kinda confused here. Are you saying 500 at the wheels? Thats sounds high, unless the cars super heavy. I have a full weight car minus glass bumpers and no spare, jack, etc. Mustang guy I spoke with recently put 400 down at the wheels, runs 10 something, and has gotta be heavier than my car. His car weighs like 4000, convertible, GT, loaded. Dude at the dyno said my 400 horse pull should get me mid to low elevens. Is that right? If so, I wouldn't think it would take 500 to go 10.99. Thanks for replying!
Just Build it to take 600hp and be done with it...
I have seen alot of cars that were suppost to be 10sec buick's run alot slower than they were shooting for.. Takes alot of practice, and your car working perfect but 500hp will take you there..
400hp is more in the ballpark of 11.50 or so..
Matt
I have seen alot of cars that were suppost to be 10sec buick's run alot slower than they were shooting for.. Takes alot of practice, and your car working perfect but 500hp will take you there.. 400hp is more in the ballpark of 11.50 or so..Matt
I will say it again.....HP required to run a certain speed is a function of weight...how much does your car weigh? It will take a speed of 121+ to run 10.99 (and a very good 60' time....in the 1.4x's)
my car weighs 3712......it will go 125.....I have 600+ flywheel HP
if you weigh less, it'll take less
my car weighs 3712......it will go 125.....I have 600+ flywheel HP
if you weigh less, it'll take less
BTW
Woody, I think the 60' time needed really depends on your TR (how much HP you're making and how much your car weighs) cause I've seen several TRs with a 1.5x 60' time in the 10's and I know Nashty (Roger Davis) ran 10.25 @131mph with a 1.52 60' off the foot brake
Woody, I think the 60' time needed really depends on your TR (how much HP you're making and how much your car weighs) cause I've seen several TRs with a 1.5x 60' time in the 10's and I know Nashty (Roger Davis) ran 10.25 @131mph with a 1.52 60' off the foot brake
REDS HOT AIR
Buick Tweaker
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definatly need traction more than hp..
i didnt try to launch hard to not break nothing but i went 127 mph and still was only 11.16 with a easy 1.8 60 ft
i didnt try to launch hard to not break nothing but i went 127 mph and still was only 11.16 with a easy 1.8 60 ft
86brick, maybe you missed my point....a car that runs 131 in the 1/4 does not need a good (read 1.4) 60' time......a car that runs 122 will need a hellofa 60' time to crack the 10's....the bottom line is plain and simple, horsepower to weight and the ability to get it to the ground....a car running 131 should be in the 9's with traction!
I know a few cars that can idle off and run 10's.....what does that prove except the car is making a lot of power.....speed is the number you look at.....speed is HP! (et is traction+HP)
I know a few cars that can idle off and run 10's.....what does that prove except the car is making a lot of power.....speed is the number you look at.....speed is HP! (et is traction+HP)
Woody, I see what your saying now that you explained it.... a car with less HP will need a better 60' time to run the same ET as a car making more HP assuming both cars are of equal weight. So, assuming your best trap speeds are 122mph in a full weight (3700lb+) TR you will definately need one helluva 60' time (1.4x or better) to run a 10.9x in the 1/4. I'm guessing to get those 60' times in the 1.4's you will really need a trans-brake so you can launch with 15-20lbs of boost and get the front tires off the ground!!! BTW Woody, since your in AZ you've probably seen some of those 6spd turbo Supras that run low 11's @140+mph with a crappy 60' time
BTW Woody, since your in AZ you've probably seen some of those 6spd turbo Supras that run low 11's @140+mph with a crappy 60' timemalibuick231
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1/8 mile and 1/4 mile
I would like to know what reds 1/8 mile time was because i think that it may be taking to long for the turbo to spool. He may need a looser converter now to get his et down. As far as hp goes my car made 413hp and has went 11.27 at 118. I also have 3.08 gears so that hurts my 60 foot only a 1.59. But I think they are right in saying you have to have traction to get the et because on radials I run 11.87 at 118. I think it would take about 450hp and leaving in the car good to get 10s but that is just me.
I would like to know what reds 1/8 mile time was because i think that it may be taking to long for the turbo to spool. He may need a looser converter now to get his et down. As far as hp goes my car made 413hp and has went 11.27 at 118. I also have 3.08 gears so that hurts my 60 foot only a 1.59. But I think they are right in saying you have to have traction to get the et because on radials I run 11.87 at 118. I think it would take about 450hp and leaving in the car good to get 10s but that is just me.
HRpartsNstuff
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You got it 86brick. My motor was nothing special, but good bolt-on's. With stk heads ported by myself, I know I was not making big HP #'s. I went 10.71 @ 124.9, so it wasn't too far off 
, but it was a bit lighter @ 3500# w/me in it. The big helper was my 1.40 60 ft time. If you don't plan to come out hard, you got to make the ponies (torque really). I like to make the car work, not the motor. All the hp in the world don't mean a thing if you can't get it to the pavement & keep it there.
I never used a trans-brake on it either. Just foot brake & get the boost climbing on the line. When it went past 20#, I let off the brake & held on for dear life With it tuned right, some stall speed (3000+), and good working suspension, it will come out as hard as you want it to. The trick is a smooth easy moving rear suspension (up/down), so it can keep the weight transferring & get the front wheels in the air Any binding or resistance & not all the weight transfers & then the tires lose traction. A trans brake can overcome some of this in some situations, but at the price of stressing everything more when it shocks the driveline.
Hope that helps. I would think the HP needs to be around 500 to do it, but the torque will need to be more (around 600) & as flat of curve as possible. If you don't have that much, get the suspension working & launch it harder! There is more than one way to get it done
, but it was a bit lighter @ 3500# w/me in it. The big helper was my 1.40 60 ft time. If you don't plan to come out hard, you got to make the ponies (torque really). I like to make the car work, not the motor. All the hp in the world don't mean a thing if you can't get it to the pavement & keep it there.I never used a trans-brake on it either. Just foot brake & get the boost climbing on the line. When it went past 20#, I let off the brake & held on for dear life
With it tuned right, some stall speed (3000+), and good working suspension, it will come out as hard as you want it to. The trick is a smooth easy moving rear suspension (up/down), so it can keep the weight transferring & get the front wheels in the air Any binding or resistance & not all the weight transfers & then the tires lose traction. A trans brake can overcome some of this in some situations, but at the price of stressing everything more when it shocks the driveline.Hope that helps. I would think the HP needs to be around 500 to do it, but the torque will need to be more (around 600) & as flat of curve as possible. If you don't have that much, get the suspension working & launch it harder! There is more than one way to get it done
Yeah I've heard that there are a pretty good amount of turbo Supras in AZ and I personally saw one down here that was built in Miami with a big single turbo (GReddy T88 I believe) and a 6spd that ran an 11.22 @141mph with a sh!tty 60' on BFG drag radials They make great #'s on the dyno, but can't seem to put all that power to the ground and get a decent 60' probably because of that IRS....
HRpartsNstuff, I agree that there is more than one way to get it done cause making a lot of power is great, but having a car that is capable of launching and getting great 60' times like those 1.40's is much more important IMO! It must feel awesome to lift the front wheels off the ground
They make great #'s on the dyno, but can't seem to put all that power to the ground and get a decent 60' probably because of that IRS....HRpartsNstuff, I agree that there is more than one way to get it done cause making a lot of power is great, but having a car that is capable of launching and getting great 60' times like those 1.40's is much more important IMO!
It must feel awesome to lift the front wheels off the groundREDS HOT AIR
Buick Tweaker
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click here to see my timeslip
i left barely off idle on this one. the long reaction was trying to get the scanner i had in record mode..dont worry i went by the other car like he hit the brakes.
it will spool the turbo up but i didnt want to break nothin so i could drive it back home...basically i just wanted to try and tune it but even down at 23-24 # it maxes my 50# injectors
i was out tonight and it easily boosted up ..not sure how high i can go but i let it rip at 10 # one time and it instantly shot up in boost blowwing the hoosiers off badly..i was on concrete
i made a first and second gear pull on the highway leaving at 4# and it was hazing the tires thru 2nd gearat 24# boost...cant wait to feel it with some injectors and more boost..
i left barely off idle on this one. the long reaction was trying to get the scanner i had in record mode..dont worry i went by the other car like he hit the brakes.
it will spool the turbo up but i didnt want to break nothin so i could drive it back home...basically i just wanted to try and tune it but even down at 23-24 # it maxes my 50# injectors
i was out tonight and it easily boosted up ..not sure how high i can go but i let it rip at 10 # one time and it instantly shot up in boost blowwing the hoosiers off badly..i was on concrete
i made a first and second gear pull on the highway leaving at 4# and it was hazing the tires thru 2nd gearat 24# boost...cant wait to feel it with some injectors and more boost..
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HP and 10'z??
3700#, T-400, stock rear...
12psi boost... Car made 486 RWHP[3900 rpm] and 685# torque[3300 rpm]
Car went 10.27@133 w/ a 1.45 short time, @ 18#.
1/8th 6.54@105.. same run.
Looking at my ""should do" chart, I see the following:
w/ a 1.45 short, the car would have gone 10.75@123, IF I hit all the ET points on the chart between leave and termination of the run.
Looking at the MPH,[end of run] @133, and working in reverse order, the run should have looked like this:
134.0/10.00, 1/8-6.34, 330-4.06, 60-1.37.
The conclusion, as Woody said, is the ET and the MPH are tied somewhat, but as Paul said.. short times are in there too.
Obviously, the engine made well over 500 at the higher boost level of 18#. It also made more torque. Having said that, the car did not run the 60' it should. [Given the HP and torque] Converter was FUBAR..
Bottom line, [from the chart] want to run a ten??
Here's the first 10 run on the chart:
60-1.46, 330-4.36, 1/8-6.81, 10.75@123.5
Looking only at the 60' time can be misleading.. Turbo is coming up, the car is still reacting to launch, some tire spin could be in there, and the shift could be in the process too. 330' times are a good indicator to lokk at, in addition to the 60's.
ALOT of the "real pro's" look to see ZERO tire spin w/ an automatic trans and 1/2 to1 rev w/ a stick car...
The car will be dyno'd soon and some "new" suspension pieces installed... Stay tuned! You may hear the sound of broken rear gears and maybe a D/S too!!!
3700#, T-400, stock rear...
12psi boost... Car made 486 RWHP[3900 rpm] and 685# torque[3300 rpm]
Car went 10.27@133 w/ a 1.45 short time, @ 18#.
1/8th 6.54@105.. same run.
Looking at my ""should do" chart, I see the following:
w/ a 1.45 short, the car would have gone 10.75@123, IF I hit all the ET points on the chart between leave and termination of the run.
Looking at the MPH,[end of run] @133, and working in reverse order, the run should have looked like this:
134.0/10.00, 1/8-6.34, 330-4.06, 60-1.37.
The conclusion, as Woody said, is the ET and the MPH are tied somewhat, but as Paul said.. short times are in there too.
Obviously, the engine made well over 500 at the higher boost level of 18#. It also made more torque. Having said that, the car did not run the 60' it should. [Given the HP and torque] Converter was FUBAR..
Bottom line, [from the chart] want to run a ten??
Here's the first 10 run on the chart:
60-1.46, 330-4.36, 1/8-6.81, 10.75@123.5
Looking only at the 60' time can be misleading.. Turbo is coming up, the car is still reacting to launch, some tire spin could be in there, and the shift could be in the process too. 330' times are a good indicator to lokk at, in addition to the 60's.
ALOT of the "real pro's" look to see ZERO tire spin w/ an automatic trans and 1/2 to1 rev w/ a stick car...
The car will be dyno'd soon and some "new" suspension pieces installed... Stay tuned! You may hear the sound of broken rear gears and maybe a D/S too!!!
Assuming constant acceleration, rwhp = 197 * (total weight going down the track in pounds) / (et * et * et in seconds), so a 10.99 requires 549 hp with a 3700 lb car (and driver and tank of gas). Since hp isn't constant with rpm you will need more peak hp than that, and then to run the number on a hot summer afternoon means you need a combo that could do maybe 10.60 on a cool fall evening .
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