Quote:
Originally Posted by S/ST 3040
My car is a back-halved 67 Barracuda. It weighs 2620 lbs. with me in it. The engine is +.060" 340 w/9.24:1 compression, OEM 596 castings w/1.88" IN valve, roller cam, Victor 340 manifold and Holley 950 carburetor. I run an aluminum drum, 904 transmission w/2.45 1st gear and trans-brake. Dana 60 w/5.57 gear. Either 31.2" or 32.6" tire.
I have been using an 8" ATI converter that hits about 6250 RPM on the brake and it has worked pretty well for the last few years.
Fast forward to this year, I decided to swap to a tighter 8" converter and it hits about 5800 RPM on the brake.
Anyway, here's my question: Is it typical to have to alter your shift points after swapping to a "better" converter?
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What's your criteria that has you believing it's "a better converter"?
The one critical bit of information you omitted and frankly the first and foremost bit of information necessary when discussing converters, in the absence of dyno results is... your cam's duration @ .050?
Without it, there is no meaningful discussion or advice.
Lastly, you have an engine combo that maybe makes 500+HP and 400+ ft/lbs. torque at probably around 5000 RPM. A converter that flashes to 5800 is too loose no mind one that flashes to 6250 IF the goal is to "shave some ET." The fall back RPM is what is most important.