How much HP can the S4 tranny (6 Spd) reliably handle?
06-25-2002, 06:22 AM
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How much HP can the S4 tranny (6 Spd) reliably handle?
Everybody is chipping and modding away, and with my previous car ( a 400HP Mitsu Galant VR4) I used to go through trannies like I change oil. First gear just couldn't handle the added HP/torque. What is the difference between our unit and the RS4?
06-25-2002, 06:32 AM
#2
Re: How much HP can the S4 tranny (6 Spd) reliably handle?
the Manual can handle 625 HP and 800 lb-ft of torque.
the Tip can handle 308 HP and 310 lb-ft of torque.
go 6 speeds!
the Tip can handle 308 HP and 310 lb-ft of torque.
go 6 speeds!
06-25-2002, 07:37 AM
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Getrag says otherwise...
From <a href="http://www.getrag.de/frameset.htm?http://www.getrag.de/econtentlink/02_produkte/02_01_manuelle_schaltgetriebe/index.htm">Getrag's web site</a>:
<b>AUDI / VW (FWD/4WD)
A4/A6/A8/S4/S6/S8/Passat</b>
6 speed manual transmission
(longitudinal installed transmission)
815 (C90) Type
Torque: 284-400 Nm (209-295 lbf-ft)
Produced in Neuenstein
<b>AUDI / VW (FWD/4WD)
A4/A6/A8/S4/S6/S8/Passat</b>
6 speed manual transmission
(longitudinal installed transmission)
815 (C90) Type
Torque: 284-400 Nm (209-295 lbf-ft)
Produced in Neuenstein
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06-25-2002, 08:40 AM
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I spoke with both Getrag and Audi about this... They are spec'd for 440Nm
withouth any problems. However, they said, there is CONSIDERABLE headroom on these trannys 
I couldn't get them to tell me how much (for obvious reasons), but they kept saying "considerable". So, if we guess a few percentages...
(let's assume 325ft-lb as a base - the math is easier, and it's close enuf (440Nm = 324.5 ft-lb))
20% = 390
30% = 422
40% = 455
50% = 488
And as we know, the RS4 has the *EXACT SAME TRANNY* (well, 2 gear ratios are different, but the rest of the transmission is identical). There are plenty of tuned RS4's outside the states, and I have yet to hear reports of an exploded tranny.
I'm inclined to believe they can withstand 500lb-ft or more before they start to have issues.
-T
I couldn't get them to tell me how much (for obvious reasons), but they kept saying "considerable". So, if we guess a few percentages...(let's assume 325ft-lb as a base - the math is easier, and it's close enuf (440Nm = 324.5 ft-lb
))20% = 390
30% = 422
40% = 455
50% = 488
And as we know, the RS4 has the *EXACT SAME TRANNY* (well, 2 gear ratios are different, but the rest of the transmission is identical). There are plenty of tuned RS4's outside the states, and I have yet to hear reports of an exploded tranny.
I'm inclined to believe they can withstand 500lb-ft or more before they start to have issues.
-T
