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Old 01-29-2007, 08:55 PM   #1
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Default Can you always hear the car shift?

I noticed something odd...today I was out playing around with my car and my neighbor's car. I clearly heard his car shift...there was a distinct click into gear. On my car I don't hear it. Is it normal for you to not hear the shift all the time? Say if it's shifting late into the RPM range (as I assumed I had set the 2speed on my car). It seems to perform well, acceleration seems good and the top speed is above what you would see if you only got first gear.

Just an odd observation I was curious about.
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Old 01-29-2007, 11:27 PM   #2
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Quote:
Originally Posted by Dredd
I noticed something odd...today I was out playing around with my car and my neighbor's car. I clearly heard his car shift...there was a distinct click into gear. On my car I don't hear it. Is it normal for you to not hear the shift all the time? Say if it's shifting late into the RPM range (as I assumed I had set the 2speed on my car). It seems to perform well, acceleration seems good and the top speed is above what you would see if you only got first gear.

Just an odd observation I was curious about.
You should hear a noticable drop in RPM's when the car shifts. Sounds like your car is shifting into 2nd gear almost imediatly.
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Old 01-30-2007, 01:29 AM   #3
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If it shifts early there is a chance you may not here it but if it does it later in the rev's you should usually notice it

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Old 01-30-2007, 01:53 AM   #4
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What Roy said..
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Old 01-30-2007, 09:29 AM   #5
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Another thing that will cause that condition is if the clutch is set up tight with slip and the shift shoes are not gapped close to the 2nd gear hub. I have set my car up this way on slick tracks to keep from braking loose at speed. 2 cents, Mike
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Old 01-30-2007, 10:03 AM   #6
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If your car is using the most use "SHOE" type 2-speed, you SHOULD NOT hear the "CLICK" sound like you mentioned.......you should hear the RPM sounds changes just like a real car.........

I know HPI use finger type 2-speed, and THAT might sounds like a "Click" but I have never seen one...

A "dummy" way to tell your 2-speed shift too early or never shift (thats why you cannot hear any differents)....tighten the 2-speed to tight position and check the speed of the car for 1-2 laps the most...you should not hear any RPM differents or shifting...if that is exactly the same as your previous setup, your 2-speed was setup shift too late.

Complete opposite if your car is running 2nd gear immediately...that means you were setup your 2-speed engaged too soon...

Some test and trail, you will get the answer (assumed all your parts are in good condiiton)
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Old 01-30-2007, 03:09 PM   #7
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My Neighbor was using an HPI so maybe that's why there was a noticable sort of click or whatnot.

Now I ran my car today with no other noises and listened closely. There is a point where I can hear the RPMs change and the engine sound changes ever so slightly then continues on. So it is shifting, I just wasn't actually hearing anything without really listening for it.

Was just curious.
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Old 01-30-2007, 03:23 PM   #8
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General rule... it should shift about 40 feet off the coner... but like I said, this is a general rule, the track, engine, etc... will change this to get the max out of the setup for a fast lap time...
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Old 01-30-2007, 06:46 PM   #9
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A good way to tell if your car is shifting is to hold it by the roll bar off the ground with the car running, ease the throttle open and watch the front of the car. When it shifts the front end will pick-up. Once you have the car shifting right on the track you can use this method to get a good reference point for the shift after a re-build!
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Old 01-31-2007, 09:08 AM   #10
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Quote:
Originally Posted by bvoltz
General rule... it should shift about 40 feet off the coner... but like I said, this is a general rule, the track, engine, etc... will change this to get the max out of the setup for a fast lap time...
An easier way to adjust the gearbox is to have it change at approx. the 1/3rd point of the main straight. Hours of testing showed that this give us the fastest time between 2 points at either end of the main straight and our lap times tumbled in general
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Old 01-31-2007, 02:19 PM   #11
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Quote:
Originally Posted by teammpp
An easier way to adjust the gearbox is to have it change at approx. the 1/3rd point of the main straight. Hours of testing showed that this give us the fastest time between 2 points at either end of the main straight and our lap times tumbled in general
Good point, the track I run at, 40 feet is about 1/3... Also if you slip your clutch /or don't, this will have an impact on the shift point.. Depending on the motor, I basicly want to keep the engine in the power band as long as possible...
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Old 02-03-2007, 06:41 AM   #12
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Default no not al ways

depends on how you have it set up to change
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