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Schultzy89GTA M.R.A. (11sec Club)

Joined: 08 Jan 2004 Posts: 4417 Location: Gresham, OR
1989 Pontiac GTA
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Posted: Sun Oct 01, 2006 9:46 am Post subject: 12 Second Club - New Member! |
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Well still not optimal but definitely an improvement...
First run, 12.925 @ 109.58, 1.970 60
2nd 12.729 @ 109.39, 1.793 60
3rd 12.971 @ 109.56, 1.892 60
Also tried the juice a few times...
4th run 12.62 @ 120.54, 1.710 60
5th run 12.417 @ 118.53, 1.812 60
No 11's this night but running with the drag radials was way cool. If anyone is interested in excuses I have a bunch of them
-Schultzy _________________ Red Sled: 89 GTA, 383, TKO, N2O
12.73 @ 109.39, 1.793 60 \ 11.794 @ 121.16, 1.62 60 (old combo) |
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82camaro383 12sec Club

Joined: 11 Sep 2005 Posts: 117 Location: Pullman/Vancouver, WA
1985 Chevrolet Camaro Z/28
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Posted: Sun Oct 01, 2006 10:13 am Post subject: |
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Welcome to the 12 second club! _________________ 85 Z28, 383 Stroker, TH350 tranny, Richmond 4.10 gears, dual exhaust
Fastest Time: 12.7sec @ 107mph |
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83Z28BlackBetty Bam-Ba-Lam

Joined: 13 Mar 2006 Posts: 2083 Location: Aloha
1983 Chevrolet Camaro Z/28
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Posted: Sun Oct 01, 2006 10:51 am Post subject: |
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WAHOO!!!
congrats, so how deep do you want to go now?
~JAKE _________________ 1983 Z-28 5.7 LT1, T56, Headman headers, BW 9 Bolt Posi Disc, WS6 suspension
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chevymad Master B
Joined: 11 Jan 2004 Posts: 5476
1987 Pontiac Formula
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Posted: Sun Oct 01, 2006 11:00 am Post subject: |
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| I take it there were no 9bolt explosions anyway. Just noticed the 120mph.... thats flying. 60s are better but must still be having traction issues even with tires?? |
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Twilightoptics Hardcore (12sec Club)

Joined: 13 Jan 2004 Posts: 9191 Location: Auburn , WA
1987 Chevrolet Camaro IROC-Z
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Posted: Sun Oct 01, 2006 11:28 am Post subject: |
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Only noticed him spin once... and that was on one of the n20 runs.
Might need to launch at a little higher rpm yet. Not sure where his peak torque was. I did notice that a couple times by the time he was staged, he didn't have time to get a true rpm... it was launch as the rpm was reving up. |
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chevymad Master B
Joined: 11 Jan 2004 Posts: 5476
1987 Pontiac Formula
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Posted: Sun Oct 01, 2006 12:01 pm Post subject: |
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Somethings definately slipping somewhere. 120mph shows he could be running low 11's.. so definatly got the horsepower.. 1 second to find somewhere.. Maybe his shifting??
You race too Paul? 13.01@ 107 right??  |
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82camaro383 12sec Club

Joined: 11 Sep 2005 Posts: 117 Location: Pullman/Vancouver, WA
1985 Chevrolet Camaro Z/28
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Posted: Sun Oct 01, 2006 12:21 pm Post subject: |
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I ran a 12.7@106mph and the car was hoking up. What was your 60' times. _________________ 85 Z28, 383 Stroker, TH350 tranny, Richmond 4.10 gears, dual exhaust
Fastest Time: 12.7sec @ 107mph |
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Dewey316 The Lama

Joined: 08 Jan 2004 Posts: 7295 Location: Bringing the tech
1990 Chevrolet Camaro RS
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Posted: Sun Oct 01, 2006 1:19 pm Post subject: |
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| You dork. You said you weren't going, so I didn't go to the track. |
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Schultzy89GTA M.R.A. (11sec Club)

Joined: 08 Jan 2004 Posts: 4417 Location: Gresham, OR
1989 Pontiac GTA
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Posted: Sun Oct 01, 2006 1:45 pm Post subject: |
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Sorry John. It was a crazy day of running around and I forgot to call.
82Camaro383 - 60' times are in my original post. The 60' for my 12.7 was 1.793.
I have a lot to go in my launch technique but at least with the DR's it wasn't just pure spin like the street tires. I also think that Brandon is right (duh) about my clutch. I think I need to adjust the pivot ball. It doesn't release until almost all the way to the floor. On the 120MPH run I was trying to get into 2nd for what seemed like an eternity, finally got it in there and then took off. Don't know what went wrong on the 118 MPH run, I sure 'felt' like a rock star lol! I have a few other things that I need to figure out as well but if I post them all it just looks like excuses. We'll get there.
As far as new goal, the only drag race goal I have ever had is to run an 11 sec 1/4 mile E.T. The car is not set up for drag racing. I'm still seeking the goal but it appears within reach. I was pleased to finally break through the 13 sec curse.
-Schultzy |
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Nathan J Member
Joined: 24 Dec 2005 Posts: 161 Location: spokane
1986 Pontiac Firebird
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Posted: Sun Oct 01, 2006 4:24 pm Post subject: |
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your 60ft is what is killing you, you have the mph to run the number, a normal number is ever tenth you take off the 60ft will give you 3 tenths or more overall, what does your 330ft and 660ft look like? looks like your making alot up in the top end, maybe try to get some more rpms up at launch if the tires will hold. maybe also unhook your front sway bar, that should help a little also in throwing some more weight back.
Nathan _________________ 86 firebird
383sbc
th350 t brake
4th gen rear soon 9in ford rear |
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Twilightoptics Hardcore (12sec Club)

Joined: 13 Jan 2004 Posts: 9191 Location: Auburn , WA
1987 Chevrolet Camaro IROC-Z
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Posted: Sun Oct 01, 2006 7:10 pm Post subject: |
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| Nathan J wrote: | | your 60ft is what is killing you, you have the mph to run the number, a normal number is ever tenth you take off the 60ft will give you 3 tenths or more overall, |
I don't agree with that.
I've heard people say at most 2 tenths for every one tenth off the 60. In my experiance and looking back at all my runs over the past 6 years.... 1 tenth off the 60 yeilds 1 tenth off the 1/4. This is with an automatic and very consistant runs.
Just MHO. |
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Nathan J Member
Joined: 24 Dec 2005 Posts: 161 Location: spokane
1986 Pontiac Firebird
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Posted: Sun Oct 01, 2006 7:57 pm Post subject: |
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every car is differs, most of this i have seen from friends cars in deep 10s and 9s, where 60 ft are not 1.8 and up they where going from 1.6 to 1.4 and so on. Its a weird thing, also if you dead hook out of the hole you normally will see a better time but slower mph, but if you spin you will see a higher mph and slower time. but that is only from a hand full of cars. anyway though, if his car is a auto have you ever figured out the conv slip? because unless you are just spinning hard out of the whole your 60 ft should be less, so look at your converter. but then again if its not a pure drag car then getting a converter that is tighter might not be what you want. i spent almost 800 on my converter, to get it tight for nitrous use. but its a drag car so anyway hehe. also what kind of shot where you spraying? just wondering.
Nathan _________________ 86 firebird
383sbc
th350 t brake
4th gen rear soon 9in ford rear |
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Twilightoptics Hardcore (12sec Club)

Joined: 13 Jan 2004 Posts: 9191 Location: Auburn , WA
1987 Chevrolet Camaro IROC-Z
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Posted: Mon Oct 02, 2006 7:38 am Post subject: |
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Mikes car is a 5 speed. I never claimed that Mike's 1.8 60 time could ever yeild a 10 second run.
I know the 9's and 10's run sub 1.4 60s. They also launch at peak torque, have significantly higher torque/power levels, AND are gear propperly for the track. And usually lighter.
Running a stick, being a non experianced drag racer, Launching a hair low on rpm, AND not running an ideal gear setup (from first gear not being ideal, to the rear gears not being steep enough) I think a 1.7 60 is fine. If your gears are too tall, you wont get the 60 foot lower without significantly more torque to move the 3850lb sled.
I was refering to my runs in 2 different camars, an s10, and a C10... all different motors, weights, all with different automatic transmissions. 65 runs in all with autos. My point in pointing out the auto, is that it's more consistant and you should see that 60ft at the end of the track more clearly. |
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QwkTrip 11sec Club

Joined: 17 Feb 2004 Posts: 3942 Location: Peoria, IL
1989 Pontiac Firebird
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Posted: Mon Oct 02, 2006 3:44 pm Post subject: |
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| Twilightoptics wrote: | | In my experiance and looking back at all my runs over the past 6 years.... 1 tenth off the 60 yeilds 1 tenth off the 1/4. This is with an automatic and very consistant runs. |
Running quicker out of the hole will give you even quicker yet 1/4 mile times. It's not just the difference in '60 foot times. The reason lies in the fact that you are accelerating from different initial velocities through different distances down the track.
It's been a heck of a long time since I've done any calcs like this so correct me if I'm wrong....
Let's say you have two cars, A and B, with identical ability to accelerate at a constant acceleration of 20 ft/sec-sec. Both cars leave the line at the same time. Car A leaves with no slip and car B leaves with some slip and takes 3.000 seconds to go the first '60 feet. Car A gets to accelerate with no slip for the entire 1320 ft of the track. The times for car A are,
t = sqrt (2*x / a)
60 foot mark ---> t = sqrt [2*(60) / (20)] = 2.449 sec
1320 foot mark ---> t = 11.489 sec
Car B takes 3 seconds to travel the first 60 feet. Assuming constant acceleration the speed of car B at the 60 foot mark is,
x = 1/2*(a)*(t)^2
a = 2*(60) / (3*3)
a = 13.333 ft/sec-sec
v = a*t
v = (13.333)*(3)
v = 40 ft/sec
Once car B stops slipping at the 60 foot mark it also accelerates at the same rate as car A (20 ft/sec-sec). However, car B does this for only the last 1260 feet of the track.
x0 = 60 feet
v0 = 40 ft/sec
x = x0 + v0*t + 1/2*a*t^2
1320 = 60 + 40*t + 1/2*(20)*t^2
t = 9.402
So the times for car B are,
60 foot mark ---> t = 3.000 sec
1320 foot mark ---> t = 3.000 + 9.402 = 12.402 sec
And the lead car A has at each point is,
60 foot ------> lead = (3.000) - (2.449) = 0.551 sec
1320 foot ---> lead = (12.402) - (11.489) = 0.913 sec
A half second lead at the 60 foot mark resulted in nearly a full second lead at the 1/4 mile. |
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Twilightoptics Hardcore (12sec Club)

Joined: 13 Jan 2004 Posts: 9191 Location: Auburn , WA
1987 Chevrolet Camaro IROC-Z
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Posted: Mon Oct 02, 2006 9:23 pm Post subject: |
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[quote="QwkTrip]
A half second lead at the 60 foot mark resulted in nearly a full second lead at the 1/4 mile.[/quote]
[quote="Twilightoptics]I've heard people say at most 2 tenths for every one tenth off the 60. In my experiance and looking back at all my runs over the past 6 years.... 1 tenth off the 60 yeilds 1 tenth off the 1/4. This is with an automatic and very consistant runs. [/quote]
2 tenths for every 1 tenth.
That would be a 2:1 ratio. Which is what you concluded in your ... well obnoxious math post. I was only pointing out that there are more variable involved, and shared my experiances. I don't think it's nice to hipe something up without backing it up.
Engines don't read books... neither do drag strips. There are basic fundamental physics involved, but never will math be recreated in real life on a drag strip.
Again... all just my humble opinion. If I ran I 1.7 60ft, I wouldn't expect 9 tenths to come off my original 2.0 60ft. Which was my previous point. |
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Jess Administrator
Joined: 24 Nov 2003 Posts: 429 Location: Mount Vernon, WA
1988 Pontiac Formula
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Posted: Tue Oct 03, 2006 7:52 am Post subject: |
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Nice Job Mike  _________________ '88 Formula
'95 Trans Am - Sold
'88 GTA - Sold
'89 Firebird V6 - Sold |
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rjmcgee The Hammer

Joined: 08 Jan 2004 Posts: 2328
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Posted: Tue Oct 03, 2006 8:26 am Post subject: |
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Awsome Mike!
Congrats on the runs.  |
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Schultzy89GTA M.R.A. (11sec Club)

Joined: 08 Jan 2004 Posts: 4417 Location: Gresham, OR
1989 Pontiac GTA
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Posted: Tue Oct 03, 2006 11:27 am Post subject: |
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Thanks guys.
-Schultzy |
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90droptoproc Member
Joined: 25 Jan 2005 Posts: 490
1989 Chevrolet Camaro RS
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Posted: Tue Oct 03, 2006 2:40 pm Post subject: |
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finally, way to go!! _________________
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QwkTrip 11sec Club

Joined: 17 Feb 2004 Posts: 3942 Location: Peoria, IL
1989 Pontiac Firebird
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Posted: Tue Oct 03, 2006 2:44 pm Post subject: |
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| What's obnoxious to you is a proof to me. Just a different way of thinking I suppose. If you don't relate to math or physics that's fine. |
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