Converter HELP!

[dag19]

Howdy all! I need help in deciding which torque converter I need for my application. My initial thoughts are that I need one with a 3000rpm stall. What say you?

Here is my cam info:
Cam Style Hydraulic flat tappet
Basic Operating RPM Range 2,800-7,000
Intake Duration at 050 inch Lift 244
Exhaust Duration at 050 inch Lift 244
Duration at 050 inch Lift 244 int./244 exh.
Advertised Intake Duration 292
Advertised Exhaust Duration 292
Advertised Duration 292 int./292 exh.
Intake Valve Lift with Factory Rocker Arm Ratio 0.505 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.505 in.
Valve Lift with Factory Rocker Arm Ratio 0.505 int./0.505 exh.

It will be used in conjuction with a TCI TH350 Streetfighter. If you need/want any more info I will be happy to provide it.

[C20-67_N_MO]

If you check on Jegs.Com on their brand Torque Converters they have a chart on which one you will need based on the duration of your camshaft.

here is their cart:


Performance Torque Converter
General Application Chart *
Advertised
Camshaft Duration Rear Gear Ratio Engine RPM Range & Compression Ratio Converter RPM Stall Speeds **

Stock to 260° Stock to 3.23 1000-4600
8 to 9.5 1500 to 1700
Stock to 265° Stock to 3.23 1400-5000
8 to 9.5 1600 to 1800
265° to 280° 3.00 to 3.73 1600-6000
9.5 to 10.5 2200 to 2400
280° to 300° 3.55 to 4.56 2000-6500
9.5 to 11 3000 to 3400
280° to 310° 3.73 to 4.88 2800-7000
10 to 11.5 3500 to 3800
290°+ 3.73+ 3400-8000
10.5 to 12 3500+


* This chart is a guideline. The stall speed may vary in your application.

** Using the same torque converter, big block applications will usually experience
stall speeds approximately 200 RPM higher than what is shown

If this is too hard to read in this format just check out Jegs.Com and click on any of their converters and it will have this chart.

Nice cam selection btw!

[dag19]

That is a good bit of info. After I checked them out and looked at their converters I see that they have one that has a stall speed of 2700-3000rpm and another that is 3100-3500rpm. Should I go for the higher stall speed?

My main concern is getting one that is too low cause I have a Holeshot 2400 in the stock tranny with shift kit etc but I feel like that was a major cause of this current transmission failure. So I want to be able to get the right one and not have to tear anything out of there...ever again!!!

[raycow]

Originally Posted by dag19

My main concern is getting one that is too low cause I have a Holeshot 2400 in the stock tranny with shift kit etc but I feel like that was a major cause of this current transmission failure.

How did too low a stall speed contribute to your transmission failure?

Ray

[dag19]

Originally Posted by C20-67_N_MO

Nice cam selection btw!

Thanks a lot!!

[C20-67_N_MO]

Your main thing is you need to match your converter with the gear ratio and compression ratio of your engine. And then the duration of your camshaft. Once you do that you can get right TQ for your vehicle.

[dag19]

My compression ratio is 10.5:1. My rear end has 4:10 gears. Does that help?!

[dag19]

Not entirely sure! All the reading I have done on them gets me confused... I was under the assumption that the tranny doesn't perform to its fullest potential when there are not the correct RPM's to push the fluid at the proper time through the converter to engage the transmission. Possibly some more slippage, lower performance. All in all I can't know! That's why I am on HERE asking YOU guys!