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quick question about top rpm

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Old Jul 4, 2004 | 06:50 PM
  #1  
chevyrumble83's Avatar
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Joined: Feb 2004
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Car: 1983 Z28
Engine: 350
Transmission: TH350
quick question about top rpm

when raceing and your in second at what rpm do u change to 3rd? my car is on speed in the upper rpms of second and its like it never looses power but i dont wanna go to fare a do damge so i change to 3rd. at what rpms should i change to 3rd?? what does it depend on?? how high do u go?? if u guys can give me all the info on this it would be great it would help me out with raceing ALOT! thanks
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Old Jul 4, 2004 | 08:04 PM
  #2  
84firebird383's Avatar
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Joined: May 2004
Posts: 608
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From: Oshkosh wi
Car: 77 Firebird
Engine: 454
Transmission: th350
Axle/Gears: 4.10
Your cam, heads,and gearing will determine what your optimal shift point is. The quality of parts you used in rotating assembly(crank, rods,and pistons) and wether or not good engine building techniques were used will determine if it all holds together.
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Old Jul 5, 2004 | 12:44 AM
  #3  
AM Racer's Avatar
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From: Northern Illinois
The best thing would be a trip to a shop with a chassis dyno. At least you'd see on paper where peak power comes in.
Otherwise it's back to back runs moving shift points a couple hundred at a time while watching the MPH on the time slips.
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Old Jul 5, 2004 | 04:51 AM
  #4  
XJOSHX's Avatar
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From: New Bedford Ma
Car: 1988 Iroc-Z
Engine: L98
Transmission: 700R4
Originally posted by AM Racer
The best thing would be a trip to a shop with a chassis dyno. At least you'd see on paper where peak power comes in.
Otherwise it's back to back runs moving shift points a couple hundred at a time while watching the MPH on the time slips.


I agree
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Old Jul 5, 2004 | 08:39 PM
  #5  
chevyrumble83's Avatar
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Car: 1983 Z28
Engine: 350
Transmission: TH350
i see, well i have changed almost everything(sig)(still dont know specs on cam till dyno) im planning to get a dyno in 2 weeks anyway so ill just go from there. i dont wanna take a chance and go to high then boom time to empty your bank and visa card lol (students are really poor lol)
till the dyno ill just play it safe, how high should u bring the RPMS in second for a stock 350 engine with say a holley carb, holley intake, and full exhaust?

Last edited by chevyrumble83; Jul 5, 2004 at 08:42 PM.
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