Shutting off engine crossing finish line - Page 2

e vassar · 09-03-2019, 09:58 PM

Quote:

Originally Posted by MR DERBY CITY

Mr. E,....if you have not experienced engine problems before, why would you want to shut your engine off now ? Many , many 3 speed trans builders Do NOT recommend this ....

Well I don't know. Maybe I've been lucky. I try to ask questions and learn as much as I can. Maybe with 3 qts of oil in the engine it makes sense to get it shut off ASAP. But otherwise no.
Thanks for the good info.

Dyno · 09-03-2019, 10:02 PM

Rehr-Morrison has a great article in their tech area why you should shut down the engine at the finish line. A valve body with a clean safe neutral should be used however. There are many tech articles on their site but that are a “must read” if you are a racer.

Dana Fitzpatrick · 09-03-2019, 10:37 PM

On my stick BBC I push the clutch pedal in and let it idle.Should I also key it off?

MR DERBY CITY · 09-03-2019, 10:51 PM

Quote:

Originally Posted by e vassar

Well I don't know. Maybe I've been lucky. I try to ask questions and learn as much as I can. Maybe with 3 qts of oil in the engine it makes sense to get it shut off ASAP. But otherwise no.
Thanks for the good info.

Let me clarify my answer, I am only talking about SBC Stockers with 3 speed GM automatic transmissions with Cheetah shifters...no clean neutral....

ALMACK · 09-03-2019, 11:09 PM

I have a TCI shifter hooked to a reverse valve body c-6.
It also will not make a clean shot from 3rd to neutral

ALMACK · 09-03-2019, 11:13 PM

Just curious...

Auto trans
Go thru the traps at 120 plus
Straight to neutral and Shut the engine off and coast

I have always wondered how the output shaft gets lubrication since the front pump is not running ?

Shadylane · 09-04-2019, 12:08 AM

Quote:

Originally Posted by Dana Fitzpatrick

On my stick BBC I push the clutch pedal in and let it idle.Should I also key it off?

I put my stick car in neutral and shut the engine off, which also shuts off the Racepak.

SSGN · 09-04-2019, 06:24 AM

I watched the videos here on class racer. Many of the older cars do this and the newer cars seem to leave it in gear. As mentioned some 3 speed trans builders don't recommend it. The clean neutral valve body would be a must, I would think.

BRINK · 09-04-2019, 08:06 AM

Don't try it without a clean neutral transmission. Period.

Floyd Staggs · 09-04-2019, 08:45 AM

Isn't there a danger of the front drum letting go if you free wheel it at that kind of RPM?

09-03-2019, 10:02 PM	#12
Dyno Senior Member Join Date: Dec 2002 Posts: 916 Likes: 1,139 Liked 685 Times in 204 Posts	Re: Shutting off engine crossing finish line Rehr-Morrison has a great article in their tech area why you should shut down the engine at the finish line. A valve body with a clean safe neutral should be used however. There are many tech articles on their site but that are a “must read” if you are a racer. Last edited by Dyno; 09-03-2019 at 10:55 PM.

09-03-2019, 10:37 PM	#13
Dana Fitzpatrick Member Join Date: May 2009 Posts: 148 Likes: 4 Liked 10 Times in 6 Posts	Re: Shutting off engine crossing finish line On my stick BBC I push the clutch pedal in and let it idle.Should I also key it off?

09-03-2019, 11:09 PM	#15
ALMACK VIP Member Join Date: Jan 2009 Location: Bardstown, KY Posts: 1,937 Likes: 131 Liked 369 Times in 127 Posts	Re: Shutting off engine crossing finish line I have a TCI shifter hooked to a reverse valve body c-6. It also will not make a clean shot from 3rd to neutral

09-03-2019, 11:13 PM	#16
ALMACK VIP Member Join Date: Jan 2009 Location: Bardstown, KY Posts: 1,937 Likes: 131 Liked 369 Times in 127 Posts	Re: Shutting off engine crossing finish line Just curious... Auto trans Go thru the traps at 120 plus Straight to neutral and Shut the engine off and coast I have always wondered how the output shaft gets lubrication since the front pump is not running ? __________________ Alan Mackin Stock 3777/ SS 3377 P/SA & SS/PA Fox Thunderbird I/PS '95 Mustang GT

09-04-2019, 06:24 AM	#18
SSGN Senior Member Join Date: Feb 2006 Posts: 644 Likes: 131 Liked 140 Times in 51 Posts	Re: Shutting off engine crossing finish line I watched the videos here on class racer. Many of the older cars do this and the newer cars seem to leave it in gear. As mentioned some 3 speed trans builders don't recommend it. The clean neutral valve body would be a must, I would think. __________________ The more people I meet the more I like my dog Kevin

09-04-2019, 08:06 AM	#19
BRINK Member Join Date: Jan 2012 Location: Leclaire, Iowa Posts: 250 Likes: 392 Liked 140 Times in 43 Posts	Re: Shutting off engine crossing finish line Don't try it without a clean neutral transmission. Period.

09-04-2019, 08:45 AM	#20
Floyd Staggs VIP Member Join Date: Feb 2006 Location: Cucamonga, CA Posts: 1,522 Likes: 156 Liked 229 Times in 99 Posts	Re: Shutting off engine crossing finish line Isn't there a danger of the front drum letting go if you free wheel it at that kind of RPM? __________________ Floyd Staggs 787 SST