12 sec or better club ( street )
08-27-2016, 05:47 PM
#61
Safety Car
We are old Street and Canyon Racers
We have two cars, but our C3 hits low 11seconds in street trim and drops to the 10 second range when we hookup the NOS and mount the slicks on the track! It's a 327 with over 500hp! Redline set at 8200rpms! About 12.5 compression and we dial in 40+degrees of advance!
We can run a lot of tire in the back!
We have two cars, but our C3 hits low 11seconds in street trim and drops to the 10 second range when we hookup the NOS and mount the slicks on the track! It's a 327 with over 500hp! Redline set at 8200rpms! About 12.5 compression and we dial in 40+degrees of advance!
We can run a lot of tire in the back!
08-27-2016, 06:09 PM
#62
Team Owner
08-27-2016, 08:46 PM
#63
Le Mans Master
Member Since: May 2002
Location: Lebanon Township New Jersey
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Yikes , Well lets call it close , When I used that math I ended up with 11.72 . I ran 11.35 
So it is close but 4 tenths is off a lot ..
However , I was unable to come off the line hard I sat an an idle of 850 and took off on the green. So that may cause a blooper in the calculation.
I suspect now that I have my 4 link 4.11 on her I will be closer to 10.80 with a proper launch
So it is close but 4 tenths is off a lot .. However , I was unable to come off the line hard I sat an an idle of 850 and took off on the green. So that may cause a blooper in the calculation.
I suspect now that I have my 4 link 4.11 on her I will be closer to 10.80 with a proper launch
Get back to the track with the solid axle and drag radials and do the math with the new numbers. Looking forward to your results. Good luck.
08-27-2016, 09:10 PM
#64
Drifting
is there a formula for mph i did 8.55 1/8th @ 88.26 mph with wheel hop, calculators I test with online says 13.5 1/4 (dam wheel hop) at 109.44 which equals 12.4...does that sound right?
Last edited by Kacyc3; 08-27-2016 at 09:24 PM.
08-28-2016, 10:03 AM
#65
Le Mans Master
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In your case, 109 mph is plenty to run 12.4 or better. I've run some 12 teens at 109. Getting that 60 ft time down in the low 1.7s is what you need to do. I'm guessing your car is a manual trans with the wheelhop issue. That makes it more challenging, but I've seen it done by 4 speed C3s on drag radials.
08-28-2016, 10:33 AM
#66
Drifting
I don't know a formula for 1/8 vs 1/4 mph, but the real goal is low ET, the mph is kind of a byproduct.
In your case, 109 mph is plenty to run 12.4 or better. I've run some 12 teens at 109. Getting that 60 ft time down in the low 1.7s is what you need to do. I'm guessing your car is a manual trans with the wheelhop issue. That makes it more challenging, but I've seen it done by 4 speed C3s on drag radials.
In your case, 109 mph is plenty to run 12.4 or better. I've run some 12 teens at 109. Getting that 60 ft time down in the low 1.7s is what you need to do. I'm guessing your car is a manual trans with the wheelhop issue. That makes it more challenging, but I've seen it done by 4 speed C3s on drag radials.
08-28-2016, 11:12 AM
#67
My 69 has a .070 over 1/4" stroked 454 so right around 500" engine with GM square port heads that have been mildly worked, LS-6 intake which is not ideal, but fits under the factory hood. Mid 230s intake at .050, and mid 240s on the exhaust with just over .600 lift full hydraulic roller, HP 950 cfm carb. Car is fully loaded and is kind of heavy, 308 gears t-400 trans with a 2200 converter. I haven't had it to the track yet, but my guess is 12s probably high 12s. With some mods and a different hood, possibly headers and bigger exhaust it would go Quicker, but it is such a nice street car, and can be driven anywhere in comfort.
Last edited by centuryoldracer; 08-28-2016 at 11:14 AM.
08-28-2016, 01:22 PM
#68
Safety Car
But it can not account for your ability to launch and get traction. It assumes those important points have been covered by the car owner and driver.
08-28-2016, 02:09 PM
#69
Drifting
I understand they can't predict wheel hop and or tire spin but if they can give me n accurate corrected time the car should run is what I was looking for.
Last edited by Kacyc3; 08-28-2016 at 02:09 PM.
08-28-2016, 03:43 PM
#70
Le Mans Master
A pretty close formula for 1/8 to 1/4 is 1.56.
Say your 1/8 is a 7.6.
7.6 X 1.56 = 11.85 for the 1/4.
This formula is usually pretty close for most cars. Sometimes I use 1.57 for cars that are a bit lazy out of the hole.
Say your 1/8 is a 7.6.
7.6 X 1.56 = 11.85 for the 1/4.
This formula is usually pretty close for most cars. Sometimes I use 1.57 for cars that are a bit lazy out of the hole.
08-28-2016, 04:21 PM
#72
Le Mans Master
There are no real accurate speed formulas..
Generally speaking, a car that makes decent power will gain 24-25 mph from the 1/8 to the 1/4.
A car that makes really good power(800-900hp) may gain 29-30 mph...
A lot depends on the car's traction, efficiency, aeros, etc etc... I would expect no less then 20 mph gain on the back half, even on a stock car...unless it's really heavy, not aerodynamic or the converter/gearing is really off.
Generally speaking, a car that makes decent power will gain 24-25 mph from the 1/8 to the 1/4.
A car that makes really good power(800-900hp) may gain 29-30 mph...
A lot depends on the car's traction, efficiency, aeros, etc etc... I would expect no less then 20 mph gain on the back half, even on a stock car...unless it's really heavy, not aerodynamic or the converter/gearing is really off.
08-28-2016, 05:17 PM
#73
Safety Car
08-28-2016, 11:57 PM
#74
Thanks.
Those are great ETs btw
09-10-2016, 12:50 AM
#75
Melting Slicks
Well took it out to the track again tonight.....not quite there yet, best I could do was a 13.08 @ 106 with a 1.91 60'
It was the friday night street drags, but it seemed to me there were more trailered cars there than street driven cars, mine was one of the slowest cars there I think.
Thats it for me this year, I have a bunch of projects at home that need done before winter comes, so I'll have to try again next year.
I would really like to get into the 12's on street tires.....ohhh so close
Ohh ya, I met Cagotzmann out there too, kind of nice to meet someone from the forum and chat cars....
It was the friday night street drags, but it seemed to me there were more trailered cars there than street driven cars, mine was one of the slowest cars there I think.
Thats it for me this year, I have a bunch of projects at home that need done before winter comes, so I'll have to try again next year.
I would really like to get into the 12's on street tires.....ohhh so close
Ohh ya, I met Cagotzmann out there too, kind of nice to meet someone from the forum and chat cars....
09-10-2016, 02:59 AM
#76
Le Mans Master
Rear suspension I have some work in... TRW 340lb spring, QA1 single adjustables set to almost full stiff, adjustable strut rods, dragvette loops. Rear end is a Tracdogg Super 10 bolt, FT Wayne Clutch & Drivetrain 3" x .095" half shafts with solid 1350 spicer u-joints. Toms axles etc.. 255/60 MT ET Street radials.
The best 60' is a 1.51. Not really that great but...It only has 3.36 gears and a tight 10" converter so.....The motor is doing all of the work on its own.
Last edited by ajrothm; 09-10-2016 at 03:00 AM.
09-10-2016, 01:07 PM
#77
Precisely why I don't like 5 and 6 speed manual transmissions,that 2 3 shift you often have trouble with. . I'm thinking about an A833 chrysler 4 speed with a gear vendors. People say it won't fit but I want to see for myself.
The good news is your car is going to be pretty quick considering your list.
The good news is your car is going to be pretty quick considering your list.
He is running a TKO which is know to have 2-3 third shift problem @ higher RPMS unless modified to help the 2-3rd shift. (not sure if his has the mod's to help 2-3 shift) This is the main reason I went with T56, plus the higher torque rating, plus the high gas mileage, and plus the extra cost. (
) Ops that's not a plus.The TKO still shifts better than the factory 4 speed cars.
But anyone with really fast drag cars all run auto's.
Last edited by cagotzmann; 09-10-2016 at 01:15 PM.
09-10-2016, 01:11 PM
#78
Well took it out to the track again tonight.....not quite there yet, best I could do was a 13.08 @ 106 with a 1.91 60'
It was the friday night street drags, but it seemed to me there were more trailered cars there than street driven cars, mine was one of the slowest cars there I think.
Thats it for me this year, I have a bunch of projects at home that need done before winter comes, so I'll have to try again next year.
I would really like to get into the 12's on street tires.....ohhh so close
Ohh ya, I met Cagotzmann out there too, kind of nice to meet someone from the forum and chat cars....
It was the friday night street drags, but it seemed to me there were more trailered cars there than street driven cars, mine was one of the slowest cars there I think.
Thats it for me this year, I have a bunch of projects at home that need done before winter comes, so I'll have to try again next year.
I would really like to get into the 12's on street tires.....ohhh so close
Ohh ya, I met Cagotzmann out there too, kind of nice to meet someone from the forum and chat cars....
This is my best. Stock ZZ383 with T56 Magnum 6 speed 2.66 1st and 3.08 Rear. Michelin super sport tires.
This is what I like to do to my car. After last weekend track days.
Last edited by cagotzmann; 09-10-2016 at 01:13 PM.
09-12-2016, 01:37 AM
#79
Racer
ok so im in. mid 12's, then we overdrove the blower by installing a smaller top pully, added a carb and ignition and have not been to the track since. When the weather is nice, it's what I drive to work. My wife drives it and my 25 yr old daughter will to, when Im in the passenger seat of course..
Last edited by akdale; 09-12-2016 at 01:37 AM.
09-12-2016, 11:28 AM
#80
Team Owner
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St. Jude Donor '05
Those online ET calculators, or assuming a time due to dyno # in a sense ricer math but not-
Only way to really tell is to go down the track
1.91 isnt bad for a street tire
Only way to really tell is to go down the track
1.91 isnt bad for a street tire