Thread: 383 Low rwhp, tq

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I'm still a 3 pedal guy, but I don't understand how a hi stall converter would lower torque and horsepower on a chassis dyno. Is the slippage that bad, or what????

Originally posted by 73RS
big_G1, what stall are you running. Stall converters will give you some lower numbers on the dyno torque and HP. The bigger the stall the worse it gets.

5 Speed Richmond, 3.08 rear axle, dyno pulls in 4th gear....

Originally posted by big_G1
Thanks for the advice. I called Comp Cams earlier today, they recommended a very similar cam, XR280R. I ordered it today. Thanks for all your help, I'll let you know how it worked out.

What are the plans with this engine? Prostreet, mostly strip, Hot street, daily driver(hope not) That 280 is a decent cam and might make some more horses. It on a 110 lsa, calls for 10:1 CR and wants a 2800 stall with 3.73-3.90 rear gear. You might wanna go to www.racingjunk.com and list those heads for trade or something. They are a little to much to try to tame down and produce decent torque levels. Horsepower will come but higher in the RPM range.

Originally posted by camaro_fever68
What are the plans with this engine? Prostreet, mostly strip, Hot street, daily driver(hope not) That 280 is a decent cam and might make some more horses. It on a 110 lsa, calls for 10:1 CR and wants a 2800 stall with 3.73-3.90 rear gear. You might wanna go to www.racingjunk.com and list those heads for trade or something. They are a little to much to try to tame down and produce decent torque levels. Horsepower will come but higher in the RPM range.

This is in a 3100 lb. 68 Vette, Richmond 5 speed. Pro-Street/strip use. Not a daily driver. I have a buddy with same heads/cam, only a 406 and he is making 400/400 at the wheels. He is using 1.6 rockers, tho. I figure with my 1.5 rockers, my numbers will be close to his.