| From | Message |
Tim CH
R/T
5/23/2004
17:08:16
|
 Subject: 15.82 sec for the 1/4mile - how sad
IP: Logged
Message:
Today I had the first time the chance to race my 99 R/T CC here in Switzerland. You have to know, that 1/4mile races here take place 3-4 time a year!
I shifted the AT manually with OD off. I had a lot of wheel spin but couldn't make a better time than 15.82 sec. My mods are Mopar headers, Mopar PCM, M1 intake, 52mm throttle body, and 2.5" exhaust with a dynomaxx muffler and metal cat. What will I need to modify to come into the 14secs?
I have to add that I didn't remove the heavy bed cover nor the tailgate.
Thanks,
Tim
Tim
|
irish
Dodge Dakota
JOIN HERE
5/23/2004
17:23:32
| RE: 15.82 sec for the 1/4mile - how sad
IP: Logged
Message:
Tim-
If you had considerable wheelspin,tonneau,spare and tailgate, there is .5 or more time right there you could shave off. Temps/humidity play a big role as well. If I were you, Id make drag radials my next mod. Did you try taking the tires down to 25lbs or so? That may help you as well.
With your mods you should be able to run 14.70s IMO. Get some gears? Oh yeah get a cold air intake. That alone will work great with your mentioned mods.
'99rc r/t
13.51@99
N/A
|
racerX
Dodge Dakota
JOIN HERE
5/23/2004
17:35:22
| RE: 15.82 sec for the 1/4mile - how sad
IP: Logged
Message:
i agree, you need to do something about spinning off of the line. your 60ft times will make a big impact on the total et. get some slicks, take off the tailgate and the spare tire, hopefully you'll hook up with the slicks and your times should come down.
|
another mark
Dodge Dakota
JOIN HERE
5/23/2004
17:39:28
| RE: 15.82 sec for the 1/4mile - how sad
IP: Logged
Message:
When people say Switzerland I think of the Alps. What is the
altitude of the track? That can be a factor. Depending on
elevation it could be as much as a 1 second difference in ET!
|
kev
Dodge Dakota
JOIN HERE
5/23/2004
18:42:35
| RE: 15.82 sec for the 1/4mile - how sad
IP: Logged
Message:
a torque converter and shift kit would get around .5 to .8 sec too.
|
Jeff W
DakotaEnthusiast
5/23/2004
22:35:39
| RE: 15.82 sec for the 1/4mile - how sad
IP: Logged
Message:
Unbolt the front sway bar before you race. It will help transfer weight to the rear and improve traction.
'02 Sport 4.7 auto, Gibson exhaust, homebrew K&N cold air, 275/60 BFG Radial T/A's, Infinity CD w/Pioneer & Infinity spkrs & Kenwood powered sub.
|
GraphiteDak
GenIII
5/24/2004
00:20:22
| RE: 15.82 sec for the 1/4mile - how sad
IP: Logged
Message:
Yeal altitude has a BIG impact. High alt sucks for power.
And unbolting the sway bar shouldn't do ANYTHING for you. All those do is resist changes in suspension HEIGHT from left to the right wheel. The torsion bar wants it to maintain the same height all the time so when you go in a corner and the truck LEANS it has resistance form the torsion bar. However, if the truck leans from front to back, etc the torsion bar isn't resisting anything because the left and right wheel are still at the same height. It doesn;t resist the change from front to rear.
Now. Traction bars will help. But easier than that you can make a pinion snubber. This can be made by mounting a bracket across the frame just over the pinion housing (front section of the axle pumpkin just behind where the drive shaft connects to the axle). Then you make a removable bracket that has a rubber stopper looking thing just like what you have above each end of your axle that prevents your suspension from bottoming out metal to metal. The rubber pinion snubber is mounted to be almost touching the top of the pinion with you in the truck and all other weight that is normally in there for race. Then when you launch and the weight shifts back for that instant you hit the gas, instead of the weight moving back, and flexing through your rear springs/shackles and causing wheel spin, the pinion snubber immediately contacts the pinion housing and transfers that shift in weigh to the rear right down to the tires! Right as you launch!
Big difference in traction.
I am so tired right now I can barely type and maybe not making sense but look up some info on pinion snubbers. You ONLY want to run it at the track because on the street it would bottom out on the pinion housing on each little bump you drive over and make your truck feel like a low rider!
|
Tim CH
R/T
5/24/2004
09:37:58
| RE: 15.82 sec for the 1/4mile - how sad
IP: Logged
Message:
Thanks a lot for your help. Before August, when I will have the next chance for a test, I will remove the tonneau cover and the tailgate, will install some race tires and my TransGo Shift kit.
Additionally I am thinking about a Powerdyne Supercharger because it is not that expensive as Vortec, ProCharger or Paxton, etc. (see seperately post)
Tim
|
ScojoDak
Dodge Dakota
JOIN HERE
5/24/2004
09:40:42
| RE: 15.82 sec for the 1/4mile - how sad
IP: Logged
Message:
I have a 99 cc with same mods except the M1 intake. I found that lowering the pressure of my Nitto extreme tires to 22/25 lbs helped. Along with "pre-loading" the leaf springs by taking the tach up to about 1100/1300 rpm's while holding the brake before the launch. This got my truck to run 15.0's. Good luck. FYI, I live in north San Diego county in SoCal.
|
Tim CH
R/T
5/24/2004
10:22:36
| RE: 15.82 sec for the 1/4mile - how sad
IP: Logged
Message:
FYI, I live in north San Diego county in SoCal!
Lucky you - I love the San Diego area. 3 months ago I bought a 1965 Mustang GT from Nevada that currently is being modified in Vista before it will find its way to Switzerland in about 3-4 weeks :) Maybe I should pack a Powerdyne into the trunk ;)
Regards from Zurich
Tim
|
ScojoDak
Dodge Dakota
JOIN HERE
5/24/2004
12:06:41
| RE: 15.82 sec for the 1/4mile - how sad
IP: Logged
Message:
Tim CH, how bout that sh!t, I live in Vista. Small world eh. Let me know if the tips I gave you work.
Regards from sunny Vista!
Scott aka Scojo
|
ummmm
Dodge Dakota
JOIN HERE
5/24/2004
14:21:21
| RE: 15.82 sec for the 1/4mile - how sad
IP: Logged
Message:
Torsion bars? graphite has done it again!!!! 2wd daks dont have torsion bars! There is a sway bar, and some sway bar extensions,tie rods, steering stabilizer, and coil springs, but no torsion bars!
|
rich
Dodge Dakota
JOIN HERE
5/24/2004
15:11:06
| RE: 15.82 sec for the 1/4mile - how sad
IP: Logged
Message:
I've never heard of unbolting the sway bar before for weight transfer...
|
irish
Dodge Dakota
JOIN HERE
5/24/2004
16:23:03
|  RE: 15.82 sec for the 1/4mile - how sad
IP: Logged
Message:
Rich-
removing the front sway at the track allows for better weight transfer- thus improving your launch. Not a great thing to do while on the street but some people leave them off anyway.
'99rc r/t
13.51@99
N/A
|
GraphiteDak
GenIII
5/24/2004
19:50:20
| RE: 15.82 sec for the 1/4mile - how sad
IP: Logged
Message:
ummmm, you got me. Like I said last night, I was tired as hell and I meant the sway bars. Obviously, from what I was talking about you know what I meant.
Sorry for the type-o.
But serisouly. If you want a cheap mod and seriously want to hook up try the pinion snubber.
It's not as good as traction bars, but still works good.
Holding the brake and a the throttle slightly helps too. However now that I think about it several months ago when I was racing this Turbo Jetta from light to light I did that and when I launched form the light I burned my tires completely through the light where I hadn;t when I just hit it from nothing before. But who knows. Maybe I had my rear tires on the white paint (crosswalk lines). You know how slippery it is on that.
|
Tim CH
R/T
5/25/2004
18:04:18
| RE: 15.82 sec for the 1/4mile - how sad
IP: Logged
Message:
@ scott
The world is definitely small :)
Nice area you are living - I keep you updated if your tips worked.
Good n8 from this side of the small world ;)
Tim
|
Joey
Dodge Dakota
JOIN HERE
5/25/2004
18:49:04
| RE: 15.82 sec for the 1/4mile - how sad
IP: Logged
Message:
has anyone tried the lightweight fiberglass front bumper from gsmotorsports.com? its supposed to lighten the front end of our trucks by 55lbs. im sure this would really help our launches.
|
Jeff W
DakotaEnthusiast
5/26/2004
17:38:21
| RE: 15.82 sec for the 1/4mile - how sad
IP: Logged
Message:
Unbolting the front sway bar is an old drag racer trick. Theoreticaly it will let the front rise up further. Anything you can do to get the front end up off the groung at launch is gonna transfer weight to the back of the truck which will help traction off the line.
I've also heard of people taking the front shocks off, but I don't know that I'd recommend that.
You could also get a set of Dak 15x8 wheels and mount up a set of drag slicks that are shorter than the stock tires (effectively lowering the gear ratio) and mounting taller tires in front, again for weight transfer.
'02 Sport 4.7 auto, Gibson exhaust, homebrew K&N cold air, 275/60 BFG Radial T/A's, Infinity CD w/Pioneer & Infinity spkrs & Kenwood powered sub.
|
Daksmack
Dodge Dakota
JOIN HERE
5/26/2004
18:15:27
| RE: 15.82 sec for the 1/4mile - how sad
IP: Logged
Message:
"Removing" the sway bar is very similar to installing the battery in the trunk for less weight up front and more in the rear.
Have you ever lifted a sway bar? Its a bit heavy.
2 cents
|
| | P 1 |
|
Post a reply to this message:
Username Registration: Optional
All visitors are allowed to post messages
|
