Is an auto better with a turbo?

92GreyGT · March 20th, 2008, 09:05 PM

I am putting a turbo on a friends Mustang and he and I are having a debate. He says that with a stick shift the boost will drop off worse than with an auto. I would agree with this except we both powershift, leave the gas on the floor, stomp the clutch pedal and move shift to the next gear, how can the boost drop off? Of course when you shift the rpms of the engine will drop due to the gear ratio change but it will with the automatic also. He's not the first person I've heard say this but no one can answer my question, why?

He has a built powerglide (he just needs a converter) and a straight cut, dog ring engagement G Force T5 with the good G Force case and output shaft, so he can go either way.

HMUSN · March 20th, 2008, 09:06 PM

buy a blow off valve.

92GreyGT · March 20th, 2008, 09:13 PM

One came in the kit.

HMUSN · March 20th, 2008, 09:14 PM

that's the job of a blow off valve.. it's there so your boost doesn't drop .. auto OR manual

92GreyGT · March 20th, 2008, 09:24 PM

Cool!

Iwannagofast · March 20th, 2008, 09:44 PM

yeah i have heard you can can half a second in the quarter by powershifting vs not powershifting with a turbo

fogged306 · March 20th, 2008, 10:03 PM

Originally Posted by HMUSN

that's the job of a blow off valve.. it's there so your boost doesn't drop .. auto OR manual

I thought the blowoff valve was to relieve excess boost pressure when you let off the throttle.. you know, turbo still making boost and throttle blade is closed equal bad things without somewhere to go.. hence the blowoff valve. I'm no turbo expert but I thought thats how it went.

rodthrower2.3T · March 20th, 2008, 10:05 PM

yeah ^ is right
with an auto the throttle never closes during shifting, boost is not lost and spool time stays relatively the same

on a manual it just relieves pressure when the throttle is closed, saves compressor from surge and helps with respooling

Stangzilla · March 21st, 2008, 12:05 AM

+ if you miss a shift and dont have the right safety measures bad things can happen.. A built auto is far superior for a boosted cat IMO

March 20th, 2008, 09:05 PM	#1
92GreyGT Newbie 1992 Mustang GT 11.89@113.86 Join Date: Nov 2007 Location: Virginia Posts: 5	Is an auto better with a turbo? I am putting a turbo on a friends Mustang and he and I are having a debate. He says that with a stick shift the boost will drop off worse than with an auto. I would agree with this except we both powershift, leave the gas on the floor, stomp the clutch pedal and move shift to the next gear, how can the boost drop off? Of course when you shift the rpms of the engine will drop due to the gear ratio change but it will with the automatic also. He's not the first person I've heard say this but no one can answer my question, why? He has a built powerglide (he just needs a converter) and a straight cut, dog ring engagement G Force T5 with the good G Force case and output shaft, so he can go either way.

March 20th, 2008, 09:44 PM	#6
Iwannagofast Hardcore Enthusiast 1990 Mustang GT 9.39@76.09----1/8th mile Join Date: Feb 2007 Location: Arkansas Posts: 1,767	yeah i have heard you can can half a second in the quarter by powershifting vs not powershifting with a turbo __________________ stang=40's dumped,pro 5.0 short throw, king cobra clutch, adj. clutch cable and firewall adjuster...pretty much stock 2001 tacoma=magnaflow, K&N cai, tb spacer, 2.5" susp. lift, 32x11.50s, electric fan, few dress up items

March 21st, 2008, 12:05 AM	#9
Stangzilla Hardcore Enthusiast Join Date: Aug 2006 Location: On my way to Baines's house!! Posts: 2,984	+ if you miss a shift and dont have the right safety measures bad things can happen.. A built auto is far superior for a boosted cat IMO __________________ Rotating The Earth 1320 Feet At A Time!! The very existence of flamethrowers proves that sometime, somewhere, someone said to themselves, “You know, I want to set those people over there on fire, but I’m just not close enough to get the job done.”

Threads Similar to: Is an auto better with a turbo?
Thread	Thread Starter	Forum	Replies	Last Post
Turbo timers and Boost Controllers? Turbo guys where you at?	95StangSVT	Poweradders	13	July 5th, 2008 06:31 PM
Auto for Auto swap ?s	RandoGT	96-98	15	October 27th, 2007 12:03 PM
Clean '97 V6 Auto -> 99+ V6/GT Manual/Auto	CyberPrey	Trade	13	March 26th, 2007 11:28 AM
Mellon's Twin Turbo Stealth vs Wills99z's Single Turbo z28	Mellon	Videos	10	December 30th, 2006 10:05 AM
Super Charger vs Turbo/Twin Turbo: Pros and Cons of each	FireryDriver	2005+	9	September 17th, 2006 04:15 PM

March 20th, 2008, 09:13 PM	#3
92GreyGT Newbie 1992 Mustang GT 11.89@113.86 Join Date: Nov 2007 Location: Virginia Posts: 5	One came in the kit.

March 20th, 2008, 09:24 PM	#5
92GreyGT Newbie 1992 Mustang GT 11.89@113.86 Join Date: Nov 2007 Location: Virginia Posts: 5	Cool!

March 20th, 2008, 10:05 PM	#8
rodthrower2.3T Regular 88 TurboChicken 8.40/83.4 Join Date: Sep 2007 Location: hobart, IN~W.Lafayette@Purdue Posts: 147	yeah ^ is right with an auto the throttle never closes during shifting, boost is not lost and spool time stays relatively the same on a manual it just relieves pressure when the throttle is closed, saves compressor from surge and helps with respooling

All times are GMT -4. The time now is 01:44 AM.
Contact Us - Modded Mustangs - Top
Modded Mustangs is ©2005-2008, All Rights Reserved, And is Not Affiliated with Ford Motor Company. Forum is powered by vBulletin ©2000 - 2008, Jelsoft Ent. Ltd. & SEO by vBSEO 3.1.0 ©2007, Crawlability, Inc.