Best way to slow a car down ?

CJohnson · 02-16-2010, 04:06 PM

Just wondering if anybody has any experience on how to effectivley slowing a car down about 8 tenths to 1 sec. in order to into two classes. The car should run somewhere around 11.8 - 12.0 flat out. looking to slow it down to 12.8 to make the sportsman class brake.

Thanks.

Z28Racer93LT1 · 02-17-2010, 07:40 PM

Weight, shift lower, take timing out. That will get you there.

Mongo · 02-17-2010, 07:50 PM

I prefer lifting and or using the brakes.

CJohnson · 02-18-2010, 04:42 PM

Quote:

Originally Posted by Mongo

I prefer lifting and or using the brakes.

Dumping a full 9 tenths ... no thanks

d1hitter · 02-18-2010, 05:27 PM

put a FORD motor in it.

CJohnson · 02-18-2010, 06:12 PM

Quote:

Originally Posted by d1hitter

put a FORD motor in it.

Ya, that should do the trick.

Freddie · 02-19-2010, 12:01 PM

Quote:

Originally Posted by d1hitter

put a FORD motor in it.

He said he wanted to slow down a second not make it a second faster....lol..

Mechanical throtle stops work good, would need to add too much weight to get that much out of it...

May try swaping out the 4bbl for a decent 2 bbl carb... less fuel/air= less power....

Chris "drooze" Wertman · 02-18-2010, 06:28 PM

Quote:

Originally Posted by CJohnson

Just wondering if anybody has any experience on how to effectivley slowing a car down about 8 tenths to 1 sec. in order to into two classes. The car should run somewhere around 11.8 - 12.0 flat out. looking to slow it down to 12.8 to make the sportsman class brake.

Thanks.

Pull a bunch of timing ?

edit...Sorry didnt see someone else had already made the correct changes...Z28.....

Ron Gusack · 02-19-2010, 09:36 AM

I'd try a restrictor plate under a spacer or disconnect the secondaries or restrict the throttle opening or all of the above.

Ron Gusack · 02-19-2010, 09:42 AM

I'd try a restrictor plate under a spacer or disconnect the secondaries or restrict the throttle opening or all of the above. I took 3 seconds out of a 10 second car by only allowing the carb to open about a third of the way. I put a piece of aluminum on the underside of the pedal.

02-16-2010, 04:06 PM	#1
CJohnson Junior Member Join Date: Jul 2009 Location: .005 ahead of you Posts: 38 Likes: 0 Liked 0 Times in 0 Posts	Best way to slow a car down ? Just wondering if anybody has any experience on how to effectivley slowing a car down about 8 tenths to 1 sec. in order to into two classes. The car should run somewhere around 11.8 - 12.0 flat out. looking to slow it down to 12.8 to make the sportsman class brake. Thanks. Last edited by CJohnson; 02-16-2010 at 04:10 PM.

02-17-2010, 07:40 PM	#2
Z28Racer93LT1 Junior Member Join Date: Jul 2008 Location: Elwood, IL Posts: 2 Likes: 0 Liked 0 Times in 0 Posts	Re: Best way to slow a car down ? Weight, shift lower, take timing out. That will get you there.

02-17-2010, 07:50 PM	#3
Mongo Junior Member Join Date: Feb 2005 Location: Windsor Locks CT Posts: 13 Likes: 0 Liked 0 Times in 0 Posts	Re: Best way to slow a car down ? I prefer lifting and or using the brakes.

02-18-2010, 05:27 PM	#5
d1hitter Banned Join Date: Nov 2009 Location: @ the track Posts: 43 Likes: 0 Liked 0 Times in 0 Posts	Re: Best way to slow a car down ? put a FORD motor in it.

02-19-2010, 09:36 AM	#9
Ron Gusack Member Join Date: Feb 2009 Posts: 244 Likes: 1 Liked 7 Times in 6 Posts	Re: Best way to slow a car down ? I'd try a restrictor plate under a spacer or disconnect the secondaries or restrict the throttle opening or all of the above. Last edited by Ron Gusack; 02-19-2010 at 09:48 AM.

02-19-2010, 09:42 AM	#10
Ron Gusack Member Join Date: Feb 2009 Posts: 244 Likes: 1 Liked 7 Times in 6 Posts	Re: Best way to slow a car down ? I'd try a restrictor plate under a spacer or disconnect the secondaries or restrict the throttle opening or all of the above. I took 3 seconds out of a 10 second car by only allowing the carb to open about a third of the way. I put a piece of aluminum on the underside of the pedal.