Good evening everyone! I need your help again(imagine that...LOL)
I need to know if the torque convertor I will be installing with a different TH350 transmission (with a B&M shift kit installed) will be too much convertor for my car(84 monte carlo). The torque convertor on the transmission that is being installed is 3500 stall. The engine is a 350 sbc with stock cam, 4 barrel edelbrock carb (600cfm). Rear end gears are street gear I believe. Currently have tranny cooler in radiator from previous tranny but not sure what kind, etc.
The reason for the tranny change is that the forward clutch was going out on the old TH350 and got an awesome deal on another TH350 tranny with the shift kit and 3500 convertor.
The use of this car will be drag strip with only a 2.5 mile drive to and from the dragstrip as it is not trailered. Not a daily driver so not concerned with MPG.
Any input would be most appreciated as I do NOT want to have to re-do this tranny anytime soon. I am anxious to get back to the dragstrip and I am hoping to have this done and ready to go in the next few days.

 

It's too much, but I'd get it anyway, eventually you will cam it, and you will love it. I have a 4k stall on my stock 5.3, and it loves it, even though it isn't supposed to.

 

To be honest, "street gear" tells me nothing. Anything 4.10 and taller (lower numerically) can be considered street able.

That being said, I think a 3500 stall is a bit much for what's essentially a stock motor (Or at least seems that way from what you've said). I'd go between 2500 and 2800, because WHERE the engine makes power in terms of RPM is just as important with selecting a stall as anything. Most stock 350s run out of breath at 4500 rpm, so a 3500 stall won't leave you much time to make power.

That's just my personal thoughts. I'm ditching my TH350 for a 4L80E.

 

Thank you for your reply. Have decided to just do stock convertor for now until I can change out the cam and go with the 3.73 gears. Have a new stock convertor available to me for next to nothing so I went with that.
Soon I will be back at the dragstrip and hopefully with some much improved times with a non slipping tranny.
I think the above mentioned mods will have to wait til winter!! LOL Must improve the driver before improvements on the car will be evident!!!
Oh I am keeping the converter for when I do the modifications

 

Thanks for your response. What I meant by street gears is 2.73...sorry. Yes the motor is pretty much stock but over the winter that will most likely change as I save more money and learn about doing these modifications myself. I will spend this summer working on me and my reaction times and getting used to car and what it will and won't do. All I know is I am having so much fun and I am learning so much. My track results right now are not impressive by an means to others but I am getting better and more consistent each time I go. Here's a link to my racing site Drag Racing- Me & The Tree - Home LOL the times definitely say "Driver needs improvement!!!!" Working on it...one pass at a time.

 

I'm at work right now but when I get home tonight I'll give a more detailed response. But if it won't see the street much I'd ditch the 2.73s ASAP. You need at least 3.42s (preferably 3.73s or 4.10s) to make any use of a 3500 stall.

 

Ok now that I'm home and can think a bit more, here are my thoughts.

I just saw you already plan on 3.73s. Good call. But you'll need a motor that runs up over 5k RPM before you can make good use of a stall that high. Intake, heads, cam, will all be needed. When you get to that point, you'll need probably a 700 or so carb to compensate. I wouldn't plan on a 750 quite yet. You will notice too big of a carb a lot more than one too small, especially on the strip. Too many people assume that they need a 750 or 800 and end up hurting their performance. Good luck.

 

Thanks for your response. I will continue the season pretty much stock and then start the winter with the modification projects. I see now I have more mods than paycheck...LOL