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Author Topic:   Whats the best way to slow a drag car?
Inbred-Jed
Journeyman

Posts: 40
From: Chester, Wv 26034
Registered: Mar 2003

posted 05-06-2003 11:40 PM     Click Here to See the Profile for Inbred-Jed     Edit/Delete Message   Reply w/Quote
I want to slow my car down to be easier on the engine and keep it out of the 9's. I tried bringing the shift point down but i go through the traps at a higher RPM. I tried setting the throttle so the 4 barrel only opens half way and the car msde its best pass to date which was a 9.97. Saturday i had to take the battery from the truck i pull with and strap it in my car to get it to run 10.00. Can i unhook the secondary linkage? Will this make the car run lean? I want to shift at 6000 and go through the traps around the same RPM. Thanks guys

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steve'66
Gearhead

Posts: 6522
From: Sonoma,CA,USA
Registered: Mar 2000

posted 05-06-2003 11:46 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
Jed,

Running off the primaries is the normal method. Disconnect the secondaries, also back off the timing. Try 28 degrees locked out.

SteveW

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johnmustang
Gearhead

Posts: 4235
From: Vancouver Island , British Columbia , Canada
Registered: Nov 2001

posted 05-07-2003 12:35 AM     Click Here to See the Profile for johnmustang   Click Here to Email johnmustang     Edit/Delete Message   Reply w/Quote
" Whats the best way to slow a drag car " ?

Swap over to a Chebbie

JOHN

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65 2+2 FASTBACK
87 TAURUS WAGON
98 F150 XLT TRITON V8 4.6, 4 WHEEL DRIVE
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Moneymaker
Administrator

Posts: 19704
From: Lyons, IL, USA
Registered: May 99

posted 05-07-2003 12:38 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Add weight.

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Alex Denysenko
Co-Administrator and Moderator

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jsracingbbf
Gearhead

Posts: 1677
From: Batesville,MS. , U.S.A.
Registered: Mar 2002

posted 05-07-2003 01:05 AM     Click Here to See the Profile for jsracingbbf   Click Here to Email jsracingbbf     Edit/Delete Message   Reply w/Quote
leave at a lower RPM, make a mechanical throttle stop for either the accelerator pedal or the linkage, add weight bars to the front of the car, shift into second ( 3 speed auto?) at a VERY low RPM, like just after you leave. Your MPH will be up but Et will go down. Or you could buy a $100.00 throttle stop from ACD. They also double as great starting line controlers

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Jerry
69 Mustang Pro ET Drag
70 Mustang retired former footbrake car

"Whiskey for my men, beer for my Horses" -- Toby Keith

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capri man
Gearhead

Posts: 3385
From: doerun, ga.
Registered: Nov 2000

posted 05-07-2003 07:09 AM     Click Here to See the Profile for capri man   Click Here to Email capri man     Edit/Delete Message   Reply w/Quote
a 195x14 spare tire full of warer weighs about 90 lbs. that is a cheap way to take about 1/10th off.
jerry, just curious, why would you add weight to the front instead of the rear? good luck, jed.

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mike r
racing is real
everything else is just a game.
81 capri-7.51 @89mph 1/8
1.54 60 ft.
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kid vishus
Gearhead

Posts: 4538
From: middle of NC
Registered: Oct 2000

posted 05-07-2003 07:36 AM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
Sometimes, if you don't add enough weight, the car will be just as fast, if not a little faster. If it makes the front /rear weight ratio better, often the car will run the same. I have never had any luck unhooking the secondaries. It did slow the car down, but it also made it incredibly inconsistant.

Put a 600 double pumper on it and add at least 150 lbs of weight. If you don;t want to turn as much rpm, change gear ratios. Thats the only realistic way to change finish line rpm very much.

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jsracingbbf
Gearhead

Posts: 1677
From: Batesville,MS. , U.S.A.
Registered: Mar 2002

posted 05-07-2003 09:30 AM     Click Here to See the Profile for jsracingbbf   Click Here to Email jsracingbbf     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by kid vishus:
Sometimes, if you don't add enough weight, the car will be just as fast, if not a little faster. If it makes the front /rear weight ratio better, often the car will run the same.

Mike, Look at KV's post, if you add weight to the front of the car it slows the weight transfer down, but then again it could cause it to NOT hook. The front may not be the place he needs to add weight, it was just a suggestion. Sometimes when you add weight to the rear of a car it makes it a little quicker. You have to play with where to add weight. Most dragsters have a weight bar in the very front for this reason.

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Jerry
69 Mustang Pro ET Drag
70 Mustang retired former footbrake car

"Whiskey for my men, beer for my Horses" -- Toby Keith

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n2oMike
Gearhead

Posts: 1547
From: Spencer, WV
Registered: Jan 2001

posted 05-07-2003 09:55 AM     Click Here to See the Profile for n2oMike   Click Here to Email n2oMike     Edit/Delete Message   Reply w/Quote
As KV said, if your goal is to take it easy on the engine, the best way would be to change the rear end ratio.

That would kill a little et, while keeping it from buzzing so hard through the lights.

Of course, adding weight would be the easiest way to add a bit of et. It's also the cheapest and most easily reversible.

Good Luck!

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Mike Burch
66 mustang real street
302 4-speed 289 heads
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Moneymaker
Administrator

Posts: 19704
From: Lyons, IL, USA
Registered: May 99

posted 05-07-2003 09:58 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by n2oMike:
As KV said, if your goal is to take it easy on the engine, the best way would be to change the rear end ratio.

That would kill a little et, while keeping it from buzzing so hard through the lights.

Of course, adding weight would be the easiest way to add a bit of et. It's also the cheapest and most easily reversible.

Good Luck!



------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
First SS/MA in the TENS!
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com

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Dad Vishus
Gearhead

Posts: 540
From: Moscow, Iowa, USA
Registered: Dec 2001

posted 05-07-2003 11:55 AM     Click Here to See the Profile for Dad Vishus   Click Here to Email Dad Vishus     Edit/Delete Message   Reply w/Quote
What about mufflers?

I have a set of collector inserts that are supposed to take about a tenth off.

Don't know if you are running open exhaust but adding muffs would be easily reversible and inexpensive.

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63 Falcon 377 Cleveland stroker Flying Toilet alchohol injection. 6.19 @ 110 MPH 1/8 mile
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Fastymz
Moderator

Posts: 11429
From: Reno Nv USA MEM#1240
Registered: Apr 2001

posted 05-07-2003 12:52 PM     Click Here to See the Profile for Fastymz   Click Here to Email Fastymz     Edit/Delete Message   Reply w/Quote
"Whats the best way to slow a drag car?" Just let me drive and work on it.

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SCOOP
oddly obsessed with big scoops on little Mustangs

2.26 60'S
14.9 @ 90.86MPH

65 coupe,351w,C4,Big Boss 429 hood scoop,8"3.40 TracLoc,Cragar SS,Black Suede.

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custom300fe
Journeyman

Posts: 4
From: Niagara Falls, Ont
Registered: Jan 2003

posted 05-07-2003 02:58 PM     Click Here to See the Profile for custom300fe   Click Here to Email custom300fe     Edit/Delete Message   Reply w/Quote
Trade engines with me. I just bet you won't get into the 9's.

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jsracingbbf
Gearhead

Posts: 1677
From: Batesville,MS. , U.S.A.
Registered: Mar 2002

posted 05-07-2003 11:43 PM     Click Here to See the Profile for jsracingbbf   Click Here to Email jsracingbbf     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Inbred-Jed:
I want to keep it out of the 9's.

Lets bolt an alky injection setup on it and see if we can get it to run eights?

------------------
Jerry
69 Mustang Pro ET Drag
70 Mustang retired former footbrake car

"Whiskey for my men, beer for my Horses" -- Toby Keith

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Inbred-Jed
Journeyman

Posts: 40
From: Chester, Wv 26034
Registered: Mar 2003

posted 05-08-2003 02:18 PM     Click Here to See the Profile for Inbred-Jed     Edit/Delete Message   Reply w/Quote
Thanks for all the feedback guys

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Ryan Wilke
Gearhead

Posts: 1501
From: Stanton, Michigan 49707
Registered: Oct 2000

posted 05-08-2003 02:43 PM     Click Here to See the Profile for Ryan Wilke   Click Here to Email Ryan Wilke     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by jsracingbbf:
Lets bolt an alky injection setup on it and see if we can get it to run eights?


YEAH BABY!!!!!!

Jerry,
you got me LOLOLOLOLOLOLOLOLOL with that one!!!

Jed,
I hope you keep us posted with what you decide to do...K?

Ryan

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Fastymz
Moderator

Posts: 11429
From: Reno Nv USA MEM#1240
Registered: Apr 2001

posted 05-08-2003 03:19 PM     Click Here to See the Profile for Fastymz   Click Here to Email Fastymz     Edit/Delete Message   Reply w/Quote
Can't you use some kind of throttle stop.

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SCOOP
oddly obsessed with big scoops on little Mustangs

2.26 60'S
14.9 @ 90.86MPH

65 coupe,351w,C4,Big Boss 429 hood scoop,8"3.40 TracLoc,Cragar SS,Black Suede.

https://mustangsandmore.com/ubb/Fastymz.html

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Inbred-Jed
Journeyman

Posts: 40
From: Chester, Wv 26034
Registered: Mar 2003

posted 05-08-2003 05:11 PM     Click Here to See the Profile for Inbred-Jed     Edit/Delete Message   Reply w/Quote
I run a pro bracket class at my local dragstrip. We are not allowed to use throttle stops or delay boxes. Transbrakes are ok but i dont need one 1.389 60ft launching at 2000rpm as of last saturday. I need this motor to last. Im POOR and cant afford to build another very quickly. It has taken me a year to put this one together. I want to slow the car but at the same time be easier on the engine so adding weight and etc wont work. Im leaning toward a restrictor plate or going to 3.89 or 3.70 gears. Ill keep you guys posted for sure and i should have some pics up soon. Does anyone want to recommend the best way to post pics on here i would really appreciate it. Step by step please...im a slow learner.

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Buster
Gearhead

Posts: 780
From: Orlando
Registered: May 2002

posted 05-08-2003 07:01 PM     Click Here to See the Profile for Buster   Click Here to Email Buster     Edit/Delete Message   Reply w/Quote
Have my wife ride along

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steve'66
Gearhead

Posts: 6522
From: Sonoma,CA,USA
Registered: Mar 2000

posted 05-08-2003 09:28 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
Jed,

I vote for the taller gears. It'll slow the 60'ers taking et away, and let the engine cruise through the traps. You'll need 3.70s to have a marked difference. You could put a cheap converter in it too, but that costs more. I'm building a 440 Dart that will start out in street class, so I put a 11" 3000 stall street converter in it with a 3.70 gear. I hope it runs low 12's and not 10/11s like it's capable of to start off anyway.

SteveW

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steve'66
Gearhead

Posts: 6522
From: Sonoma,CA,USA
Registered: Mar 2000

posted 05-08-2003 09:40 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Inbred-Jed:
Does anyone want to recommend the best way to post pics on here i would really appreciate it. Step by step please...im a slow learner.

To post pics on this site, you have to have them on another website first and then you can link to them. So those of us that don't have our own websites can e-mail the pics to the webmaster and see if he'll be so kind as to post them for you. His name is Steve L

SteveW

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