street converters-what is the criteria?

got an engine for wagon. .030 440 with torker 2 intake,bullet cam that is 271 duration and .548 lift. 242 dur @ .050, 112 lobe sep. changing rear gear to 3.54 from 4.56. 18.5x33x15 mt et streets. carb is demon race 850 but going to change that to 750 dp or maybe fi. car will be street driven with track time maybe 1-2 times a year. what do you use for info for street conv? same as race conv? car won't be driven 5k a year. trans will be rev pattern man shift 727. car has a/c also. thanks in advance for replies.

With Todays quality converters you can get a stall that works with your cam specs and still street drive it. I would stick with a 9.5" vert though around 4000 stall. Dynamic makes a nice one that works both for street and strip as do some others as well.

Another thing you might want to consider is swapping out that Torker ll for a RPM DP The Torker ll is not as street friendly.

I had a very similar combo and use a Turbo Acton 2800 stall 11".

Still use the same converter but with more cubes and more head.

Keep the 850 Demon.

Your rear gear may be too tall. You have BIG tires on the back, and slippage in the converter might negate the tall gear and just slip more. The wagon will weigh plenty and add to the problem of slippage.
A 4.10 might be a better choice considering your combo. The cam duration and single plane might not want to cruise well with the 3.55 either. Best to talk to a converter builder, and someone that can steer you right on the minimum cruise rpm. You might want to consider an RPM intake forthis combo.

GY3, what's the part # on your converter? In 11", TA's website only shows 3000 & 3600 stalls. 2800 would be ideal for a project I'm working on.

I've called several converter companies and no 2 seem to agree on anything, but a few claim to build each others' converters; mostly they seem to be race-oriented and only one could grasp a 2800 cruise RPM. I see a lot of bad reviews for the more popular companies, but of course they don't indicate if the review writer mis-applied the unit or somehow screwed it up.

Rbkt, a 3.54 with a 33" tire will be a really tall "final" or "effective" ratio. That 271 degrees, is that advertised or @ .050? I've run 31" with 3.55s (4-speed) which was nice all around, 446" RB/63 Savoy wagon; 4.10 with 31" 3000 stall behind a hot street/strip 446"/64 Savoy wagon was kinda busy over 65.

topside-the cam is 271 advertsed with 242@.050. cam is bullet crb 271/271-12fc part # 303000.randys r&p calculator chart shows 3.54 2406rpm @65mph= 3.73 2535rpm@65mph= 4.10 2786rpm @65mph and 4.56 is 3099 rpm @65. car weighs 3710 with my 220 lbs of fa in it. thanks for all above info and anymore that comes later. will call my conv guy. again thanks

I checked the math and it is correct, a little rpm added in for vert slip. Your 242 @ .050 cam will torque peak around 4200 rpm or so. So when you Do go to the track, if you want some decent numbers the 9.5 dynamic wouldn't be a bad choice.

Now know this, just because it has a stall around 4000 rpm doesn't mean it has to get to that Rpm to move the car. the Dynamic 9.5 and other newer verts Drive like normal verts under cruise in most cases with only minimal slip. 383 man drives his 3800# car with a 260* @ .050 cam and loves it on the street with the same said Dynamic vert. Other companies can build a Tight vert as well. I wouldn't want anything less then 3800 Tight, vert stall for your ride. Oh and Don't forget the RPM recommendation, you will want it for sure IMO over the Torker ll Tried them both on my 3000# car with 248* @ .050 Your Heavier car will love the RPM. I'm using the RPM @ 3000 over the Torker ll that I have.

Most of those charts do not account for any converter slip. Real life can be quite different in my experience, it's something else to talk over with your converter guy.

With the RPM you are trying to run it would be
a tight conv.. if its slipping it will build
heat unless you are above the RPM the conv
is set up for.. I run a 4600 stall with OD
and it slips 8% when in OD.. its not bad at
75 MPH but its still slipping

I honestly don't know. It's been a long time since I bought it and didn't keep the paperwork.

OK, small & torquey cam then. I'll second or third the recommendation on Perf RPM intake. Had a markedly larger cam in the '64 I referred to, and 3000 stall was fine in it. I wasn't chasing the last .10 in ET, but was driving it on the street and it wasn't lazy anywhere, but could destroy street tires anytime you hit the fun pedal.
By contrast, the 3500 stall 9.5" - supposedly a PTC, but they claim no record of it - in this BB Duster is lazy as heck below 3000. 237/242 @ .050, 110CL, .544/.541 in a 512, 3.55s, 28" tire. Not what I'd call a big cam for 512", I should think 2600-2800 stall to enjoy the mid-range torque. But Sport440 & 383man have very different experiences.
As far as charts, some have 5% added for slip, some don't.