i am putting a 350 in my 84 camaro with a comp cams 268h extreme energy camshaft. my compression ratio will be around 10-1 or 11-1 approximately. First will i need a stall convertor at all or with the stock convertor be fine. second i have been looking at torque convertors and the applications list them for 82-84 700r4s with 27spline or 84-92 700r4s with 30 spline how do i know which one i have since i have an 84 which seems to be on the border line.

 

All converters are "stall" converters. A stock converter stalls at around 1200 rpm. Although a stock converter will work in your car, you'll see a big improvement in performance if you install a higher stall converter. I'm guessing you'll need a minimum of about 2500 rpm stall.

Call TCI, B&M or any other company that sells performance converters and ask them what would be best in your car. They'll know what the best stall to use for your combination of parts. Since every car is different, what works well in one person's car may not be what you need in yours.

Prices on converters is always "You get what you pay for". Expensive converters are expensive for a reason. They're built differently to take more abuse.

Check the build date on your car. The 30 spline converters are considered 84 1/2 and up.

 

In most cases you will not get what you want or need, or what you pay for when you deal with B&M, TCI, etc., "they haven't kept up with the times". A.C.T., Precision Industries, Yank, etc., are "keeping up". Your come back ratio with B&M, TCI, etc., (due to poor workmanship) is high, check it out for yourself. If you need a custom TC for your application, let me know and I will answer any questions you might have and what I recommend on this? Let me know?

 

I just put in a yank ST3500, and am thinking now that I will upgrade it later to something in the 4000-4400 stall range.

Don't be afraid of stall. I can spin the tires at 60 mph with this convertor, and couldn't do that with a 12" 2400 stall.

Don't waste you time with B&M, a friend has an 88 IROC with miniram, and ran 13.04 @ 110 mph. The 2400 b & m convertor is holding him back from e.t.

Save your money and do it right the first time. Buy a quality convertor.

 

probuilt tell me how to get in touch with you or you can reply to this thread again. let me know what information you need to be able to tell me how much stall i need. I am really not looking to put a whole lot of money in this. i just dont want to have poor performance on the bottom end. but also i dont have to have the best either.The way i see it is my motor will be making more torque than the stock one anyway off idle so why does everyone say you need a stall convertor. I could understand if you were to have a very low bottom end torque but at 2000 rpm my motor should be making aroudn 300 or more lb ft. the stock 305 that came in the car only had a peak torque output of 250.

 

Hey guy, It is your lucky day. I have learned more about your transmission than I ever would of believed. The only way to tell what count spline you have is to take it out and count them. If you are lucky and have a 30 count then you have some options on your torque converter. The newer trans came with different rpm speeds that can be idenified by a 4 letter code that is on a sticker that is on the converter itself. Another reason to pull the transmission. The stall speeds range from 1211 rpm to 2025 rpms. The 2025 rpm ones were put in the vortec s10 trucks and the vettes. The great thing about these is that I got a high rpm torque converter for under $100. For more information go to:
http://www.theherd.com/articles/torque.html

Glad I could finally help someone.

 

I need to know the duration of the cam at .050 lift?, the lobe centers?, is it installed straight up or avanced 4 degrees?, the rear end gear ratio?, type of heads?, compresion ratio?, induction system?, type of driving you do?, are you an aggressive driver or somewhat conservative? All of these things are necessary to determine the stall speed needed?

 

the duration of the cam is .224in and .230 ex at .50lift. it is on 110 degree centers. stock rear gears which i guess is 2.73. compression ratio is going to be at least 10.1 maybe more due to the fact that i dont know exactly the size of the combustion chambers on the heads. i got the heads from a friend of mine they have been shaved and ported have 2.02 and 1.60 valves.the induction is a edelbrock rpm manifold and a carter 625 cfm carburator right now. if needed i could go bigger with the carb. the type of driving is going to be mostly conservative. However i want to be able to really crank out the power when needed. your advice on this is greatly appreciated. do i need a higher stall or keep the stock one or would switching to a smaller cam be the better thing to do i am really having a hard time deciding on this. I want to get the cam selection right the first time because i have a feeling that switching the cam when the motor is in the car is going to be a bitch. again thanks for your help.And yes the cam is going to be installed straight up.

 

If you have 2.73's, then I would advance the cam 4 degrees if it is not already ground that way. Check the timing card on the cam and see if it is at 106 degree centerline on the intak. The torque converter I would use is the A.C.T. 9.5" lockup 2,400-2,500 rpm stall, this should knock off 3-5 tenths in the quarter mile. The rear end gears should be 3.23's at least for the best all around performance. If these are cast iron heads, you better stick with 9.5-1 compression max, unless you have 95 octane gas where you are at to handle the 10-1 compression. This should help some.