If your super worried about it. Have one built to your specs. You know the stall speed of a converter depends, on engine and the weight of the vehicle.
Tell us what your doing and Maybe we could help you out more ..
Background:
1) i have a TH-350, NOT a TH-350C. Thus, i have a non-lockup transmission. The truck originally had a 350C, but i replaced it with a 350 mainly because it was much easier to find a good reman 350 with 9"tailshaft vs.
any reman 350C.
The 4.3 IS NOT the original engine. The original engine was the LE9 305, then got a goodwrench 350, then i put a LG3 305 in, then the 4.3.
2) i am ASSuming that TH-400 and TH-350 torque converters are interchangeable?
a) By the time the 4.3 came out, (85) all the TH-350C's went to lockup, thus a converter out of one of those won't work, plus i don't think any TH-350's came behind 4.3's anyways.....?
b) However, the TH-400 DID come behind many 4.3's in trucks and vans. Doesn't seem to make sense, but it's true. Since, (i think?) TH-400 and TH-350 converters are interchangeable, this is the converter i'd like to shoot for.
b1) i am, however, also open to non-lockup TH-350 converters found behind buick 3.8 v-6's and chevy 200/229 v-6's. These would be somewhere around 76-80 ish. i don't think GM had lockup converters before 80?
The problem:
What i suspect my problem is, is that my converter is too "tight" for my engine. It's a B+M traveller----i think it's designed for v-8's. When i ran 350's and 305's i could set idle in neutral for about 650-750 and when i put it in gear it would go down to 500-ish. With the v-6, i have set idle in neutral at 1300-1400 so that in gear it will be 700. Anything lower and it may stall. i have also richened the idle screws a little----i think this helps with preventing stalling, but at the same token, with the idle that high in neutral, maybe i'm not even idling on the idle circuit anymore? Truck otherwise runs ok anything above 900rpm.
i don't want to go TOO loose....
i'm looking at the B+M torkmaster 2400. It MIGHT work. The reason why i want to go salvage yard or if someone has one is that i KNOW it will work.
i just want something that will allow me to idle normally, not interested in performance right now.
Yes, i am somewhat aware that factors like vehicle weight, engine, cam etc. affect stall speed. i think most of these aftermarket converters are rated with v-8's in mind?
