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Slowing a car down...
#1191057
03/04/12 04:57 PM
03/04/12 04:57 PM
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Joined: Oct 2003
Posts: 3,698
NE Oklahoma
Von
OP
master
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OP
master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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How would you go about slowing a car down, say from 10.70s to 11.50s..without adding weight or using a throttle stop? I wonder how much you could slow it by using a 600 carb (assuming it ran 10.70s with a 950)? Or possibly a 750 carb with the secondarys unhooked? Ideas? 
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: Slowing a car down...
[Re: Von]
#1191058
03/04/12 05:05 PM
03/04/12 05:05 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I slow mine down 1 sec by using a mech throttle stop at about 1/3 open and lower the launch rpm and lower the shift points.... thats for running the 10.0 stuff... if you have a small enough carb it will do it 
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Re: Slowing a car down...
[Re: pittsburghracer]
#1191062
03/04/12 05:51 PM
03/04/12 05:51 PM
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Joined: Nov 2004
Posts: 3,544
Syracuse,NY
CompWedgeEngines
master
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master
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
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John....John...John...what are we going to do with you....go back to your room !
Slowing down that much is never easy, AND maintaining consistency, but I think the small carb is the only option along with knocking the timing out of it, but I often find, ( DEPENDING ON COMBO!) that it isnt very consistent unless you spend considerable time adjusting the carb, to keep it from surging basically. The engine is still trying to suck in the air for the cubic inches, but it cant, and depending on conditions, that can be tricky.
There was someone on here a few weeks ago with an ET plate or something that looked interesting....that looked liked it was kind of crafty. I dont have any experience with it though.
RIP Monte Smith
Your work is a reflection of yourself, autograph it with quality.
WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
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Re: Slowing a car down...
[Re: Von]
#1191064
03/04/12 06:44 PM
03/04/12 06:44 PM
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Joined: Jan 2003
Posts: 3,842
N.E. Ohio
6bblFLASH
master
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master
Joined: Jan 2003
Posts: 3,842
N.E. Ohio
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Spend lots of money on it with expectations of more power  Always works for me  P.S. sorry could`nt resist 
70` Cuda`,440 6BBL Jerico,Dana 4.56 Still on 93 Pump Gas
9.87 @ 136/1.31-60ft.`09 Mopar Nationals PASSON PERFORMANCE "Stick-Shift" Champ!
2013 StickShift Challenge Winner@ Mopar Nationals!
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Re: Slowing a car down...
[Re: pittsburghracer]
#1191065
03/04/12 06:45 PM
03/04/12 06:45 PM
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Joined: Jan 2003
Posts: 27,421
Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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Von one of our members here (Preddy) has a silver 69 Roadrunner and he slows his car down from 10.70's to somewhere in the mid to low 11's with unhooking his secondaries. I will try to find a post of his as I think it is written in his sig. Ron
Last edited by 383man; 03/04/12 06:45 PM.
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Re: Slowing a car down...
[Re: 383man]
#1191066
03/04/12 07:08 PM
03/04/12 07:08 PM
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Joined: Aug 2003
Posts: 4,991
new jersey usa
11secdart
master
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master
Joined: Aug 2003
Posts: 4,991
new jersey usa
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I slowed my Dart down from 10.70s to 11.50s a few years ago to run Street Eliminator, I`ve had great results with a modified version of the Moroso stop which is actually a bolt that turns in and out to keep the throttle from opening all the way. My present setting is that the secondaries are barely open. It doesn`t sound like much but it has worked great for me, the car is very consistent and I`ve had more round and Eliminator Wins the last three years than in my entire previous 25 plus years of racing. If you decide to use this setup make sure you attach it using more than just the carb hold down bolt as it moves with only one attaching point, I use the Jegs throttle cable bracket and drilled an additional hole to use two bolts to hold the stop so it can`t pivot on the carb bolt.
68 Dart 410 / 904
92 D150 original owner
21 Ram 1500 Quad Cab, Big Horn , Hemi ,4x4
23 Audi Q5
16 Honda HRV
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Re: Slowing a car down...
[Re: Von]
#1191067
03/04/12 07:40 PM
03/04/12 07:40 PM
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Joined: Apr 2007
Posts: 2,028
Trumbull,CT.
jim sciortino
top fuel
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top fuel
Joined: Apr 2007
Posts: 2,028
Trumbull,CT.
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Quote:
How would you go about slowing a car down, say from 10.70s to 11.50s..without adding weight or using a throttle stop?Ideas?
Do you have a big block chevy laying around???
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Re: Slowing a car down...
[Re: Cab_Burge]
#1191069
03/05/12 12:38 AM
03/05/12 12:38 AM
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Joined: Jan 2003
Posts: 27,421
Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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Quote:
Quote:
Quote:
How would you go about slowing a car down, say from 10.70s to 11.50s..without adding weight or using a throttle stop?Ideas?
Do you have a big block chevy laying around???
 Now be truthful, any Chevies V8 will do 
Ron
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Re: Slowing a car down...
[Re: 383man]
#1191072
03/05/12 09:46 AM
03/05/12 09:46 AM
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Joined: Dec 2006
Posts: 1,178
Indy
FlyFish
super stock
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super stock
Joined: Dec 2006
Posts: 1,178
Indy
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Lift at half track, that should get you close. You could also readjust your throttle cable for partial throttle. Restrictor plate would be another way to go like the ET genie. http://www.etgenie.com/
67 Barracuda street car, 408, e85, 1.38 60', 6.44 @105.9 in the 1/8 mile, 10.19 @130.5 in the 1/4...so far....
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Re: Slowing a car down...
[Re: Von]
#1191074
03/05/12 03:24 PM
03/05/12 03:24 PM
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Joined: Jan 2003
Posts: 1,263
Southwestern Ontario Canada
racealittle
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,263
Southwestern Ontario Canada
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Just lower your shift points until you reach the speed/et you are after.
Too many cars, too many parts, too little coin, too little space to work in, too little time left to make it all happen!
Update: down to one ride, still too many parts, a little more jingle in the pocket, gaining space, and it's going to happen this year!
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Re: Slowing a car down...
[Re: 383man]
#1191076
03/05/12 04:38 PM
03/05/12 04:38 PM
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Joined: Oct 2003
Posts: 3,698
NE Oklahoma
Von
OP
master
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OP
master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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Quote:
Ok I found one of Joe (Preddy's) post. He ran 10.77 @ 124 on 4 barrel and 11.48 @ 117 on 2 barrel. Ron
Ron,
Thanx for the info!!! Good info!
Im not really interested in dumping at the 1000 foot or coming out easy. Ive read where some guys are consistent, but highly doubt I would be.
I think I'll try unhooking the secondarys with a smaller carb!!
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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