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#1
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Giving up on the air shifter
I installed an air shifter on my th400 last year mainly for the 1-2 shift because it happens so fast. I ended up using a digital delay controller, Tried using the msd rpm output on the 7al box, but would hit the rev limiter on the 1-2 shift and be right on the money for the 2-3 shift. Put the digital delay controller in and had to set the 1-2 shift at 6000 to shift at 6400. Well made it to the quarter finals and the dam thing didn't shift, When I finally shifted myself it ended uo finally shifting and putting it in 3rd,
Going back to shifting it by hand by the shift light. This was the 4th race with the air shifter and worked good before lastnight as long as I remember to turn the bottle on. |
#2
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It's been a long time, but I remember having to install a capacitor to keep the noise from the MSD from interfering with the delay and throttle stop timers to have any consistency. Maybe something to check into if you don't already have something.
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'65 Tempest 467 3650# 11.30@120.31 |
#3
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What brand do you have?
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A new best of 9.135 @ 145.41 71 Lemans Sport. 72 Lemans Sport. |
#4
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Never had problems with air shifter
Make sure msd trigger wiring isn’t close to any other wiring
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2008KRE Q16 Winner 2014 atco raceway doorslammer winner 86 grand am tube car 8.95 @152 455 eheads solid flat tappet cam Hoffman Racing building and racing Pontiacs for 35 years |
#5
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The electric shifters also work real good been installing them on a couple of cars
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2008KRE Q16 Winner 2014 atco raceway doorslammer winner 86 grand am tube car 8.95 @152 455 eheads solid flat tappet cam Hoffman Racing building and racing Pontiacs for 35 years |
The Following User Says Thank You to Richie Hoffman For This Useful Post: | ||
#6
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Quote:
(plus it required more gadgets to make 2 shifts) On the dragster with a PG, it would shift about 100' out maybe? Never a problem there.
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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