Shut down procedure

[SS/GN]

How do you recommend shutting off a turbo regal at the end of a quarter mile run.In superstock we lift off the gas shift to neutral and shut motor off.We coast to the end stop the car and get out check everything over and re-start and drive back to the pits.My concern with doing this with a turbo buick is you will have no oil circulateing to cool the turbo.Thanks for the input.

Kevin

 

[DR BOOST]

drive back to the pits and let it cool off.

dont stop in the shut down, you never know how good the next persons brakes may be.

 

[jasjamz]

You should slowly back out of the throttle. Don't just slam the throttle shut at the stripe. I have a habit of popping the hood to release a bit if the heat going down the return road. I have not had over heating issues, nor do I know if it helps but it couldnt hurt.

 

[Turbo Indian]

You should slowly back out of the throttle. Don't just slam the throttle shut at the stripe. I have a habit of popping the hood to release a bit if the heat going down the return road. I have not had over heating issues, nor do I know if it helps but it couldn't hurt.

that is all fine & dandy when you need to slow down from 125mph, at 150+ mph & higher you better get on the binders in a damn hurry. try getting stopped @ an 1/8 mile track when doing 125mph, now that's a hand full.

now to answer thread starters question. I just leave it in gear, jump on the brakes and/or pull the chute turn off the track, (leave the car running) throw the chute in the car & drive back home. I have heard somewhere, can not remember where but DO NOT push the trans into neutral.

 

[LOT]

assuming you are using the 200 trans

Go through the traps in D --shift to OD--apply brake---OD alows the eng. to drop back to around 1400 RPM with no trans braking.

 

[tom robison]

If you have a 400 in your car DO NOT shift into N, The drum will come apart. Ask me how i know x2!

 

[Turbo Indian]

If you have a 400 in your car DO NOT shift into N, The drum will come apart. Ask me how i know x2!

I thought I heard that some where. easy remedy is to use a reverse shift pattern. :wink:

 

[SS/GN]

We have a had a 400 and now use a th350 in the superstocker and never had any problems in shifting to neutral.Go to a national event and all the fast cars will do this procedure. We do not use a reverse valve body as their is no advantage.With a rev valve body all the good ones have a safe neutral shifting away from park.The reason we shift to neutral is no race engine is ment to be used as a jake brake and at 140 mph when you hit the brakes or pull the chute where is all the oil going,yup thats right away from the sump.We have seen some real good oil pans and at the top end hard on the brakes you still see the oil pressure dip as the sump gets uncovered.We lift then shift to neutral let the engine come down and shut off.I have seen alot of motors hurt in the bleach box and the finish line.I am new to the turbo buick club and curios to what real fast cars do.Thanks for the info.

Kevin

 

[Phoneguy]

There was a thread about this topic in the transmission area

http://www.turbobuick.com/forums/transmission-talk/297063-dangerous-over-rev.html


Bryan

 

[S2V6RACER]

I don't shut it down, shift into neutral and log my oil PSI with my Racepak and there is no issues with oil pressure dropping at all. Must be my DLS oil pan is doing the trick.

 

[Turbo Indian]

damn ted that does look good.

 

[1of1547]

FWIW, Rossler Transmissions do not recommend shifting into neutral after going through the traps Untitled 1 . I used to shift into neutral until I found this article.

 

[davidf]

If you have a 400 in your car DO NOT shift into N, The drum will come apart. Ask me how i know x2!

+1000. I've seen one explode and come through the floorboard. Not a pretty site.

 

[ijames]

Several things happen when you lift at the finish line, one, as others said, the engine vacuum goes to its max and lots of oil can be sucked past the rings. Another biggie is that without the compression loading on the rods the peak tensile stress on the rods happens twice as often compared to the same rpm at wot so for big rpm motors that's when some rods let go. Both of those argue for shifting to neutral so the engine rpm can drop as fast as possible. Then you have to balance that against the type of trans and valve body and what is safe for that combination. Also the g force from braking will try to slosh oil forward in the pan and can starve the pump if the pickup gets uncovered.

 

[alwayscode390]

With a 6 spd, I used to shift into neutral , but my car would SHAKE like crazy , lol ---

 

[SS/GN]

Sorry to the moderator for posting this in the wrong section,I just thought the TSM cars still have 200r4 and they are the badest on the planet.I will pay more attention to the postings.:redface:Now thanks for the great input,some good ideas.I like the oil pressure monitoring on shut down that is real nice data you have.Thanks again.

Kevin