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Yes, not what my tachometer is reading, too low. Lock up converters, which give a true one to one ratio, drop rpm by 250, an extremely tight TH250C 1600 stall and the 1500 stall in my 4L60E to my D9 1900 stall and PARC 2350 rpm in my 2004R, both right around 300 rpm. I say 5% is too low of a number for torque converter slippage, that is the issue. I can turn off lock up and watch rpm just up 300 rpm. Yes, I used math, according to my tachometer, slippage is twice that much
on 3 different vehicles.
your true calculated RPM is 2,124, not 2,350 with a lock up .
Once again, my numbers are right on. You are out to lunch
Why the hell are tachometers even used if they are no where near accurate?
dude, you are way off base.
it’s math. The RPM is a calculated number from the gear ratio and the high gear ratio of 1 to 1
You can use a lockup with zero slip or no lockup and a slip factor .
The engine RPM, wether it’s a lock up or manual trans with a final gear ratio of 1:1 will be what my numbers are…if it’s auto trans i use the 3 to 5 percent slip
Hi my friends, lets try to be humble and discuss thing as they are. You to have great competence but differentiations. This case is not about 0,1 on track but a street car that will give me a smile I don't care about difference on 100 rpm ...
I agree on the HP/TQ, my 358 will be similar. The Olds 350 is kind of the opposite in design, bigger bore 4.057" vs 3.8" and short stroke 3.385" vs 4.25" and smaller bearing sizes 2.25"/2.5" vs 2.5"/3". Most guys push a bore bigger overbore when they build these, it helps cylinder head flow. Make sure the machine shop doesn't stick to tight bearing clearances when it gets built either. Good luck, enjoy this car in the meantime.
I agree on the HP/TQ, my 358 will be similar. The Olds 350 is kind of the opposite in design, bigger bore 4.057" vs 3.8" and short stroke 3.385" vs 4.25" and smaller bearing sizes 2.25"/2.5" vs 2.5"/3". Most guys push a bore bigger overbore when they build these, it helps cylinder head flow. Make sure the machine shop doesn't stick to tight bearing clearances when it gets built either. Good luck, enjoy this car in the meantime.
thats not the bore size of the 400 or the rod size of the 350.
thats not the bore size of the 400 or the rod size of the 350.
Sorry, the 350 should be 2.125" and the 400G is 3.870" bore size, my bad. Either way, almost as small as the Olds 307 bore size. A good overbore and head porting will help a lot.
Sorry about your thread. I'm sorry I said anything to this angry little man. I defended Mark Remmel in a thread and he has been harassing me ever since. SSS, you sure were right about Mark. Right now he is doing multiple Olds builds with Dyno numbers and working with Edelbrock to develop new cylinder heads. I love how right you were🤣🤣🤣🤣. One final note, your so cute.
December 4th, 2021, 04:03 PM
I don't care about difference on 100 rpm ...
