The ALC controls line pressure only, like the DR. It would not be an alternative to the VB, because the VB is physical parts that get replaced/strengthened and change shifting in a completely different manner than fluid pressure.

 

does anyone have a link to the write-up of the "Shift_fast mod"?

 

If you want the ultimate in control for our automatics, then the Shift_Fast set of mods is for you. It's a do-it-yourself version of a tiptronic. Jime first brought this out - streetlegendz and myself (at least) have installed one, and now I race with a more advanced version that shifts all gears at a set RPM, controlled with a MSD 8969 controller.

The manual version of this mod gives you a three-position toggle switch that puts you into first gear, second gear, or third gear, controlled by you. There is no other choice when the Shift_Fast is engaged. Move the switch - shift a gear. Bang.

You can switch between normal operation and the Shift_Fast with a DPDT switch - at rest only, please. When engaged, you have to shift the transmission with the switch, so you have to be aware of RPMs. It shifts very quickly and very hard. I like it.

There were earlier threads showing the wiring diagrams, wiring locations, and switch installation photos. Anyone would need to search for "shift_fast". Google for "" shift_fast site=maxima.org "" , or better yet, if you haven't, donate to the *.org so you can search... Something should show up.

 

I just installed vafc n wanted to see how close i got to rev limiter with shift_mod. went to 6449, felt nice. Iv been working on my n/a game lately, going to attempt some timing advance with fuel pressure and vafc and also going to start building me a automatic shift_mod like yours.

 

I want shift_fast I'm just not savvy on following those weird diagrams and stuff. Oh well, research research research. Streetz, I talk to you enough, so I'll be pestering you about it soon enough

 

haha, go ahead.

 

Great ! - I'll send/Email/PM you the schematic for mine.... It's not complicated - and all Radio Shack parts. Are you planning a N/A career, or just experimenting ??

Man, that's cutting it close on shift RPMs - how did that feel when it shifted? Were you on a drag strip or scaring kiddies on the street?

I'm going to KCIR tomorrow for a noon-to-4PM session - weather is predicted for 60's , sunny, tailwind. And, some more 150-shot passes are planned, with a full 15 lb and 10 lb bottle in the truck. I think I'll set the Shift_Fast for 6400 RPMs. I also put in a fresh set of 2-step-colder shaved-ground plugs and more race fuel - I found one plug with a cracked insulator - not bad, but I don't like to see this. At least all the ground straps looked normal - short, but normal. I've leaving the ignition voltage booster set at 16 volts, and set gaps to .035, up from .030. We shall see.

 

Can you send it to me also pleeeease

 

Me three, please.

 

OK - all three of you are "on my list"...


There were some good photos that "street" and I posted, and Jime had the original wiring diagram for the manual switch version. I'll have to rummage around.

Are youse guys just interested in the "automatic shifting of the manual shifter of the automatic tranny", with the MSD switch (Shift_Fast), or are you wanting to do the manual switch version (shift_fast) ? Never mind, I'll try to gather details of both - I built both, so that's possible. Huummmmm..... I'll work on it.

This sounds like another thread - maybe a sticky if enough folk are interested. Great - another project....

 

Personally I'm interested in both types. Right now, manual, but once I get my V-AFC 2 I'll have my MSD #8969 free to use for an automatic version, so I'll want the automatic version schematics/details for the future.

I agree, a sticky needs made of a thread about it. Possibly even a thread about automatic transmission upgrades/tweaks in general. Maybe I can add a section about it to go on my site alongside the 00VI section?

 

Could you include me as well? I'd like both. And I vote for a sticky on this.

 

This is a tremendously interesting thread. To all the Shift_fast guys, all I can say is nice job I too want to turn my autotragic into an automagic, can someone send me schematics with a bit of directions on how to do this please? email is skyhighlp@yahoo.com, thank you!

 

Here is the simplest drawing I can do of the manual shift-fast mod. My auto one is hooked up to my Emanage Ultimate and takes a little longer to draw because of the components.

However the manual mod works great and even better if you have a shift light and better yet if your rev limiter is raised to 7k or so.

Its very simple really with only 2 logic lines controlling the shifts, pins 6 and 7 of the TCU. Just make sure you stay in 1st gear on the shift lever and don't shift down using the switch especially if you are reving in 2nd or 3rd because it will shift down immediately and its a heck of a shock to the drive train.

The blue lines are for normal operation, the orange for the shift-fast mod. Green lines are original wires that are cut going from TCU to Transmission.

 

Good stuff. I think I'm able to grasp the concept finally.

What I'm interested in seeing are pictures of the actual controls. It's hard for me to convert these drawings into physical wires and switches in my head, plus I wouldn't have a clue what kind/type of switches to buy since I don't do a ton of wiring. So I hate to ask, Jim, but do you have any pictures of your old manual setup? Or do streetzlegendz or grey99max have any?

I think I remember seeing pictures in your original thread, Jim, but I can't seem to find that thread and the search doesn't do much for me.

 

I just got from KCIR and got car and truck and trailer put away, but I did have some photos of the wiring I did based on Jime's plan for the manual shifter.
In no particular order:

http://i48.photobucket.com/albums/f2...3/Dscn1138.jpg
http://i48.photobucket.com/albums/f2...3/Dscn1140.jpg
http://i48.photobucket.com/albums/f2...3/Dscn1135.jpg
http://i48.photobucket.com/albums/f2...3/Dscn1137.jpg

http://i48.photobucket.com/albums/f2...SHIFT_FAST.jpg
http://i48.photobucket.com/albums/f2...3/Dscn1216.jpg

And some of the MSD version:

http://i48.photobucket.com/albums/f2...3/Dscn1225.jpg
http://i48.photobucket.com/albums/f2...3/Dscn1224.jpg
http://i48.photobucket.com/albums/f2...3/Dscn1219.jpg
http://i48.photobucket.com/albums/f2...3/Dscn1217.jpg


For what they're worth - which isn't much without parts list and wiring diagram, but it sure works good.

 

Good start. Could you describe to me where that wiring harness is that you got the green/red wires off of?

Also, I'd love to see pictures of the manual switch board as far as where all the wires actually go. Again, it's hard for me to translate a sketch into actual physical wiring and switches in my head

 

The wiring is located next to the automatic transmission dipstick. Look closely, grasshopper.. See the throttle body at the top.

http://i48.photobucket.com/albums/f2...3/Dscn1138.jpg

I'll try to start taking some "inside" photos of the manual switch box. "street" had built his version into the dash, while I made mine to be removable, by unplugging everything.

 

D'oh. I hope to see pics soon

 

So, with the shift fast mod, the trans changes gears imediately....no delay/pause whatsoever (well, almost)? Or is just better than stock?

 

It shifts immediately, quick and with an MSD or EU it will shift automatically at any RPM. You can also start and hold in any gear so its great for the dyno where the auto will automatically downshift below 4k.

 

Thank you sir. Interesting that you mention the start and hold any gear. When I launch my 280, I put it into second to build boost, then drop it in first to launch. That gets me 1.6sec 60ft times. Thanks again, very good info.

 

If installed and used properly, how much will this shorten the life expectancy of a moderately modded tranny (VB mod+tranny cooler)?

If installed properly but shifted improperly on occasion, how much will it shorten the life expectancy of the tranny and how much damage can it do with a single mistake given the same set-up (moderately modded tranny)?

 

I believe if used properly it will lengthen the life expectancy.

If used improperly? I have made a few mistakes, thats why I cautioned earlier, I'm not sure dropping into 1st when you are at 6k in 2nd is good for the trans but its still working fine after 192 1/4 mile runs this year. About 125 of those were with the shift-fast mod, the others with just the DR mod.

Don't think anyone can give you any hard and fast numbers as to what the life expectancy is either way.

 

Great! now if only someone could fab-up an F1-style paddle shifter for our steering column... mmm... paddle shifter <drools>

 

If I get mine working I may just try

 

Dang - you know what, my MSD version, that shifts 1-2 and 2-3 everytime the MSD reaches its' preset RPMs, just depends on the MSD to ground one wire for the shift up to the next gear. It could even be extended to shift 3-4 as well.

If you had a normally-open switch of any sort replacing the MSD connection, then you could place the switch anywhere and tap it whenever you wanted to shift up. I use another N/O pushbutton to clear everything and make it ready for the next round of excitement. That, and the switch that decides if you're in normal operation or Shift_Fast operation, could be somewhere around the console.

Put the tranny into first gear, switch over to Race from Normal, push the Clear/Reset button, launch and tap the switch to make it shift up each gear.

Once into 3rd gear, on the road, I can put the shifter into Drive and switch back to Normal. When at the track, I wait until I'm at the time slip shack, then hit the Clear/Reset button, which drops me back into first gear immediately - I don't move the shifter out of first until I'm sure.

Warning - mess up and something bad will happen - get the hang of it and you will be fine... You will get codes when using the Shift_Fast - some due to a angry transmission computer. The price you'll pay for Shift_Fast.

 

Stop goofing around and get me pics!

jk

 

How about a bad video of the Shift_Fast in use?

http://s48.photobucket.com/albums/f2...Nov05_0012.flv

 

Cool vid, but it's kind of hard to even tell when the car is shifting and what not thanks to the background static and random noise. I assume that's the MSD-controlled version? I still want pics

Just busting your *****

 

Hey luv the video. Gotta try some more of that next year.

 

Hey, did you get my PM?

 

There's more:
http://s48.photobucket.com/albums/f2...Nov05_0004.flv
http://s48.photobucket.com/albums/f2...Nov05_0006.flv
http://s48.photobucket.com/albums/f2...Nov05_0007.flv
http://s48.photobucket.com/albums/f2...Nov05_0008.flv
http://s48.photobucket.com/albums/f2...Nov05_0009.flv
http://s48.photobucket.com/albums/f2...Nov05_0010.flv
http://s48.photobucket.com/albums/f2...Nov05_0011.flv

The quality is pretty bad, but for $50 bucks... There's gotta be a better way to record live passes, but I'm still looking..