Torque curve and Torque converter

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Dec 9, 2004 | 08:48 PM

Irish Whiskey

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Torque curve and Torque converter

If the curve for the engine's torque is relatively flat, say maxed at about 2500 rpms, what difference would there be between a tqc 2800 and tqc 3600 - are you not in the same power curve with either one?

Dec 9, 2004 | 10:34 PM

G-lock

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From: Lansing MI

Effectively none, as long as your into the powerband before full stall your good to go. It then becomes a traction issue

. Jeff

Dec 10, 2004 | 12:26 AM

Irish Whiskey

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That what it seems to be - but will higher tqc stall affect the launch time?

Dec 10, 2004 | 03:30 AM

Mitch C

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From: Davie Florida

Quote:

Originally Posted by Irish Whiskey

In most cases the 3600 will be better than the 2800 assuming both converters are of similar design (STR etc.). Because even if the torque maxes out at 2500 RPM and is the same at 2800 & 3600 RPM your engine will be making more overall HP power at 3600 RPM than it will at 2800 RPM. The extra power available should give you a stronger launch traction permitting. Plus the 3600 T/C should also give you a higher shift extension. This translates into better ETs and higher MPH in the 1/4 mile.

Last edited by Mitch C; Dec 10, 2004 at 08:03 AM.

Dec 10, 2004 | 08:07 AM

RoadRebel

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From: Macomb MI

Quote:

Originally Posted by Mitch C

In most cases the 3600 will be better than the 2800 assuming both converters are of similar design (STR etc.)

Similar design is the key, unfortunately most are not and its hit or miss as to the results. Stahl speed, flash rate and torque multiplication
built into the converter really impact how it performs.All I can say is ya get what ya pay for, for most people in the less that 500hp range they are only looking at the stall rpm and the rate that it flashes. Higher HP than that and its a different ball game and having a converter layout that matched your power, especially with a power adder is critical and will make all the difference in the world.

Phil

Dec 10, 2004 | 12:44 PM

Irish Whiskey

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Quote:

Originally Posted by RoadRebel

Phil,
Thanks for your input - I've seen some of your recent work - the str will effect the looseness and the Yank SS3600 str is 2.3 I believe. My main concern is whether or not the 3600 will be less controllable on the street with street tires than the 2800. Thanks again for input.

Dec 10, 2004 | 03:04 PM

Mitch C

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From: Davie Florida

Quote:

Originally Posted by Irish Whiskey

High stall converters with a high STR (2.0+ and up) and street tires don't go together. I have had 3 converters in my car a PT2400 with 3.42s, ST3500 with 3.73s & a TCS4200 with 3.73 gears all of these converters had high STRs of at least 2.3 and it was difficult to control wheel spin on the street with each of them. If you want a converter that will be easier to launch on street tires get a converter with a low STR like one of the SY series Yanks.

Last edited by Mitch C; Dec 10, 2004 at 03:08 PM.

Dec 10, 2004 | 04:38 PM

yankeevetteconvert

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From: TROY MI

Quote:

Originally Posted by Irish Whiskey

The STR on the SS3600 TC is 2.5.The Yank SY 3500 has a STR of 1.6 and can be used with street tires. I have one in my garage let me know if you are interested.