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Author Topic:   RPM'S /POWER
mtwrght
Dirt Newbie

Total posts: 4
posted June 17, 2001 01:57 PM
ANY SUGGESTIONS? I am running a street stock that weighs just a touch over 3000 with fuel and driver, 355 motor with big 76cc heads,bought car so pistons all i know is 10 to 1, powerglide tranny in low don,t know gear in first but believe it can only be 1.76 or 1.82 and a 4.10 rear gear. Using a 1.76 finall would be 7.2?? Now where i need help running an 1/4 mile low banked oval flat footed except letting off to set the car on entry i am only achieving 6000 rpm. This is a very competitive class that is just running off and leaving me. Where to start? Motor? Tranny? Convertor? Pleas help. Thanks in advance.

P.S. 87" rollout tire RR 85"-86" LR with msd soft touch rev limiter 6600 pill

VIPER000
Dirt Maniac

Total posts: 151
posted June 18, 2001 10:58 AM
IF ASSUMING 7.2 IS PLENTY OF GEAR BUT ASK LOCALS. BE SURE THE REAR GEAR IS 4.11. THEN I WOULD TRY A DIFERENT TRANI.

49mtmod
Dirt Roller

Total posts: 13
posted June 18, 2001 01:10 PM
How about the cam? Can you get the specs?

mtwrght
Dirt Newbie

Total posts: 4
posted June 18, 2001 10:27 PM
All the locals have said to be between 6.5 and 7.0 then make needed adjustments with tires. The rear gear i just put in myself up from a 3.42 which was getting me 5500 rpm. As for the cam the previous owner also didn't know. I would be willing to change it if it may help. Just don't know where to start.

Hobbystocker
Dirt Roller

Total posts: 19
posted June 20, 2001 03:44 PM
You may have a little better luck installing a manual 3-speed tranny.If you have the time and resources...put one in and try running it in 2nd gear with the gear you are running.It would also be helpful if you knew the specs on the cam.Did the previous owner run that engine at the track you are running at? If not,find out what kinda track he ran on and that may give you a ballpark idea of when the cam comes in.

Deek
Dirt Roller

Total posts: 19
posted June 20, 2001 04:51 PM
What's wrong with turning only 6000 rpm? You're not gonna get much more with the kind of engine you're describing without risking reliability. In fact, if you're unsure of what you've got in the engine, I would hesitate to twist it any tighter than 6 grand.

If your competitors are leaving you in the dust perhaps you have no bite off the corners. What are your corner weights? What's you're rear weight percentage? Sounds to me like you might need to work on that first.

racer17j
Dirt Maniac

Total posts: 165
posted June 21, 2001 11:43 AM UIN: 54865418
i agree with deek 6000 is plenty if your running a 1/** and your not sure what your engine is capable of yet handleing will beat horsepower 95% of the time on those little tracks

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