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  What exactly does a higher stall converter do?

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Author Topic:   What exactly does a higher stall converter do?
streetstang67
Gearhead

Posts: 305
From: SC, USA
Registered: Nov 2002

posted 01-16-2003 07:37 PM     Click Here to See the Profile for streetstang67   Click Here to Email streetstang67     Edit/Delete Message   Reply w/Quote
What exactly does a higher stall converter change?

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Moneymaker
Administrator

Posts: 19704
From: Lyons, IL, USA
Registered: May 99

posted 01-16-2003 07:41 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
It allows the engine to rev ever so slightly against the transmission so it can get in a higher RPM range on take off or launch.

(very simplified explanation)

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Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
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Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
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streetstang67
Gearhead

Posts: 305
From: SC, USA
Registered: Nov 2002

posted 01-16-2003 07:52 PM     Click Here to See the Profile for streetstang67   Click Here to Email streetstang67     Edit/Delete Message   Reply w/Quote
would it reduce wheelspin or increase it?

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steve'66
Gearhead

Posts: 6522
From: Sonoma,CA,USA
Registered: Mar 2000

posted 01-16-2003 08:46 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
A torque converter also multiplies torque, and if it stalls at the max torque rpm of your engine it multiplies MAX torque.

So the proper converter will increase wheelspin.

SteveW

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69 Sportsroof
Gearhead

Posts: 1202
From: Valley, Alabama, USA
Registered: Mar 2002

posted 01-16-2003 09:00 PM     Click Here to See the Profile for 69 Sportsroof   Click Here to Email 69 Sportsroof     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by streetstang67:
What exactly does a higher stall converter change?

fuel economy

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dubstar
Gearhead

Posts: 423
From: Long Beach, Ca 1966 A-Code Coupe
Registered: Feb 2002

posted 01-17-2003 01:56 AM     Click Here to See the Profile for dubstar   Click Here to Email dubstar     Edit/Delete Message   Reply w/Quote
how much would a 2500rpm stall converter cost? and would that do very much on a street car? or is it pointless to put them on street cars?

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Alan
1966 Tahoe Turquoise A-Code Coupe
650cfm Holley 4bbl / petronix ignition / missing valance / white vynol top

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Rory McNeil
Gearhead

Posts: 1210
From: Surrey, B.C. Canada
Registered: Nov 2000

posted 01-17-2003 03:01 AM     Click Here to See the Profile for Rory McNeil   Click Here to Email Rory McNeil     Edit/Delete Message   Reply w/Quote
It all depends on what you have planned for the car. On my 302 street Fairmont, I was racing the car regularly in the Sportsman ET bracket class (13.00&slower)at our local strip. The low compression 302 had a Performer intake & 600 Holley, headers & 3.55 gears. I put in a fairly small (204, [email protected] duration), but it was enough to kill the 60 foots by a tenth, with the stock convertor. I put in a B&M "Holeshot" convertor, & it made a pretty nice gain on the track, however, even this very tame convertor caused freeway RPM to climb by about 150-200 rpm while going 60 mph. Also, under normal, light throttle daily driving, the car will feel a bit mushy off idle, & the shifts won`t be as crisp. The looser the convertor, the more pronounced these side effects are. One nice feature with a higher stall convertor is that if you have an engine that tends to idle higher than stock, the looser convertor will reduce the shock load when you put the car into gear. In other words, it won`t bang into gear harshly.It also will not have the engine pulling against the brakes so hard at idle.But when you do step on the gas hard, the engine will climb into its powerband much quicker.

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78 Fairmont 428 4 speed [email protected]
80 Fairmont 302 5 speed [email protected]
85 Mustang NHRA Stocker under construction, 302 5 speed
59 Meteor (Canadian Ford) 2 dr sedan 332, auto
74 F350 ramp truck 390 4spd

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Moneymaker
Administrator

Posts: 19704
From: Lyons, IL, USA
Registered: May 99

posted 01-17-2003 10:58 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
11 inch 2500 RPM converters are very cheap. You can usually get one for about $200 or less from a local converter house.

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com

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