Does a torque converters stall affect rear HP
Thread Starter
Racer
Joined: Sep 2000
Posts: 288
Likes: 2
From: Chicago IL ------
Cruise-In IV Veteran
Does a torque converters stall affect rear HP
I recently dynoed my car after I did my trans.
I put in 3.42 gears and a 2400 pro torque.
Noticed power loss on the dyno but the car definitely
feels stronger. I also heard the higher the stall the more power
an auto car will suffer on the dyno. Anybody have any clues?
Thanks! Jimmy O
:smash:
I put in 3.42 gears and a 2400 pro torque.
Noticed power loss on the dyno but the car definitely
feels stronger. I also heard the higher the stall the more power
an auto car will suffer on the dyno. Anybody have any clues?
Thanks! Jimmy O
:smash:
Pro
Joined: Jun 2000
Posts: 572
Likes: 0
From: kansas city KS
Re: Does a torque converters stall affect rear HP (Jimmy O)
What I understand (which isn't much) is that HP is a factor of the converter's efficiency - which is not directly tied to stall, but is somewhat related. For example, the SY3500 is very efficient, and ST3500 is less so. Yank's website has some info and comparison charts on this.
Instructor
Joined: Aug 2001
Posts: 192
Likes: 0
From: Virginia Chesapeak
Re: Does a torque converters stall affect rear HP (Jimmy O)
You mentioned that you also put in 3.42 gears. If you previously had 2.73s or 3.15s, your car will have a lower dyno reading with the 3.42 gears. I have 3.73s in my car and it will dyno lower than if I had 3.42s.
98 A4
Donaldson Blackwing
Cartek Stage 2 Heads
Cartek M Cam
LS6 Intake
Underdrive Pulley
TPIS Headers
ST3500
3.73 Gears
B&M 28,000 Trans Cooler
172 T.Stat
[Modified by MC98, 9:22 AM 11/20/2002]
98 A4
Donaldson Blackwing
Cartek Stage 2 Heads
Cartek M Cam
LS6 Intake
Underdrive Pulley
TPIS Headers
ST3500
3.73 Gears
B&M 28,000 Trans Cooler
172 T.Stat
[Modified by MC98, 9:22 AM 11/20/2002]
Melting Slicks
Joined: Oct 2001
Posts: 2,075
Likes: 0
From: Central NJ
Re: Does a torque converters stall affect rear HP (MC98)
You mentioned that you also put in 3.42 gears. If you previously had 2.73s or 3.15s, your car will have a lower dyno reading with the 3.42 gears. I have 3.73s in my car and it will dyno lower than if I had 3.42s.
:yesnod: I have the PT2400/3.42 combo right now. I am pulling 334 RWHP on a stock motor, but I don't have a "before" dyno. If you're wondering what times you can pull at the track, see my sig :D :cheers:
CHICAGO CREW !
Joined: Nov 2001
Posts: 17,591
Likes: 93
From: We are living in a Bazzaro World everything is upside down half ass backwards !
CI 4-5-6-7-8-9 Veteran
St. Jude Donor '06-'07-'08 & '12
Re: Does a torque converters stall affect rear HP (Jimmy O)
put nitrous on it, 150 shot or more :lol: :lol: :lol: :lol: :lol: :lol: :D :D :D :eek: ===uncle johnny ;)
[Modified by johnnyvettes, 7:58 PM 11/21/2002]
[Modified by johnnyvettes, 7:58 PM 11/21/2002]
Race Director
Joined: Aug 1999
Posts: 15,466
Likes: 0
From: GARDENA Ca, State Of Konfusion
St. Jude Donor '05
Re: Does a torque converters stall affect rear HP (Jimmy O)
You will notice a drop in hp in conjunction with a high stall converter. Going from 3.42's and a PT-2400 to the 3.73's and the ST-3500 I lost 10hp from mylast dyno.
