Aftermarket Tach/limiter

hvguy · Post by **hvguy** » Tue Jul 15, 2008 3:52 am

I have been toying around with this idea for some time now. I have been wanting to make a RELIABLE rev-limiter that can be adjusted with the turn of a dial. Well, since I had just gotten into micro's I wanted to make it micro controlled. That.... worked kinda, But it became inaccurate after a certain RPM because the micro wasn't able to pick up the signal from the dizzy. Then I thought about putting a cam sensor and a notch plate on the cam..... but that never happened. Then I though about using the aftermarket tach from the ford trash I bought, but use the shift light to trigger a board I made that turns on a relay... which cuts power to the ignition coil. I finally got around to installing the tach, wiring it, and testing it. IT WORKS! Ill draw up a schematic for the board and post it in a bit.

Now I can adjust the shift light so I can limit my revs to wherever the hell I feel like!! woot.

Nasser · Post by **Nasser** » Tue Jul 15, 2008 4:47 am

dammit how did u become so smart with all this technollogy stuff

Post by **nt66** » Tue Jul 15, 2008 6:20 am

hvguy wrote:I have been toying around with this idea for some time now. I have been wanting to make a RELIABLE rev-limiter that can be adjusted with the turn of a dial. Well, since I had just gotten into micro's I wanted to make it micro controlled. That.... worked kinda, But it became inaccurate after a certain RPM because the micro wasn't able to pick up the signal from the dizzy. Then I thought about putting a cam sensor and a notch plate on the cam..... but that never happened. Then I though about using the aftermarket tach from the ford trash I bought, but use the shift light to trigger a board I made that turns on a relay... which cuts power to the ignition coil. I finally got around to installing the tach, wiring it, and testing it. IT WORKS! Ill draw up a schematic for the board and post it in a bit.

Now I can adjust the shift light so I can limit my revs to wherever the hell I feel like!! woot.

do you really need to change the rev limit on the fly? Interesting work though

Post by **dr.occa** » Tue Jul 15, 2008 10:45 am

nt66 wrote:
hvguy wrote:I have been toying around with this idea for some time now. I have been wanting to make a RELIABLE rev-limiter that can be adjusted with the turn of a dial. Well, since I had just gotten into micro's I wanted to make it micro controlled. That.... worked kinda, But it became inaccurate after a certain RPM because the micro wasn't able to pick up the signal from the dizzy. Then I thought about putting a cam sensor and a notch plate on the cam..... but that never happened. Then I though about using the aftermarket tach from the ford trash I bought, but use the shift light to trigger a board I made that turns on a relay... which cuts power to the ignition coil. I finally got around to installing the tach, wiring it, and testing it. IT WORKS! Ill draw up a schematic for the board and post it in a bit.

Now I can adjust the shift light so I can limit my revs to wherever the hell I feel like!! woot.
do you really need to change the rev limit on the fly? Interesting work though

yes, interesting work orlando. post up pics and maybe some footage of it in action and you changing it on the fly.

hvguy · Post by **hvguy** » Tue Jul 15, 2008 2:04 pm

Ill include it after I finish on the 2 step launch control feature. muahaha

Post by **nt66** » Tue Jul 15, 2008 2:13 pm

hvguy wrote:Ill include it after I finish on the 2 step launch control feature. muahaha

launch? 4ac????????

hvguy · Post by **hvguy** » Tue Jul 15, 2008 6:08 pm

nt66 wrote:
hvguy wrote:Ill include it after I finish on the 2 step launch control feature. muahaha
launch? 4ac????????

yeah, for realz. Im gonna need it; if I wanna keep tread on the tires for more than 3 launches.

Just chopped up a video, and its ready to go. uploading now

hvguy · Post by **hvguy** » Tue Jul 15, 2008 6:54 pm

erickz300 · Post by **erickz300** » Tue Jul 15, 2008 7:28 pm

thats an awesome idea. i want one now!

Overdrift · Post by **Overdrift** » Wed Jul 16, 2008 5:36 am

Pretty damn cool.

Post by **dr.occa** » Wed Jul 16, 2008 10:12 am

good work on that Orlando. your best thread yet

do you plan to post up a DIY on it here? it would be great if you did.

hvguy · Post by **hvguy** » Wed Jul 16, 2008 1:20 pm

dr.occa wrote:good work on that Orlando. your best thread yet

do you plan to post up a DIY on it here? it would be great if you did.

Sure, ill post it up here later this evening

Post by **nt66** » Thu Jul 17, 2008 4:54 pm

I still dont understand the point what would you ever need a 100rpm limiter for?

Post by **CBR_TOY** » Thu Jul 17, 2008 6:38 pm

that is actually pretty cool.

in all honesty your cosmetic ideas are well founded but turn out horrible but in general you're a damn intelligent guy

hvguy · Post by **hvguy** » Thu Jul 17, 2008 7:57 pm

CBR_TOY wrote:that is actually pretty cool.

in all honesty your cosmetic ideas are well founded but turn out horrible but in general you're a damn intelligent guy

Why thank you.

nt66 wrote:I still dont understand the point what would you ever need a 100rpm limiter for?

you dont, but its adjustable from anywhere between 0rpm's and 10k. If you need to adjust it lower than idle, sounds like a user error, not a mfg error.

www.86garage.com

Aftermarket Tach/limiter

Aftermarket Tach/limiter

Re: Aftermarket Tach/limiter

Re: Aftermarket Tach/limiter