JS Safeguard- Knock retard system

MASSIVE TYPE IV · Post by **MASSIVE TYPE IV** » Mon May 13, 2002 12:08 am

Okay....It works!!

Shad got a JS Safeguard from aircooled.net for doing alot of his maps ands tuning on his "Modern engine" he got it all dialed in, and decided he didn't need it anymore, so I traded him out of it. I figured it would make setting timing on the dyno alot faster, since getting the timing correct is the hardest part of the sessions.

I have been testing a limited displacement engine (TI) prototype for an overseas replicar company and have one like it in the beetle right now, Friday night I went to the strip and played with the safeguard. To make a long story short, I droped .9 off my ET with the safeguard armed, and pulled a 13.91 with a 1914 in a full bodied 1914 TI powered car (The plague)All night Hondas, Acuras and even a vette were really pissed off. The best one was the 440 Powered Duster that got "Dusted"

If anyone is contemplating the safeguard, it is a sweet set up and easy to hook up, most of all I know it works, as I set my timing past 40 degrees full advance, with it unarmed, but with it armed it will only go a little past 30 before it senses, and retards. It actually retards every cylinder independantly, so it frees up ALOT of power, enough that it can be felt in the drivers seat..

------------------
Jake Raby
Raby's Aircooled Technology
www.aircooledtechnology.com

Steve Arndt · Post by **Steve Arndt** » Mon May 13, 2002 3:19 am

I am going to buy one soon.

Any comments on how the sensitivity adjustment works? Can you turn it way up and make it "sense" knock even from idle (when not knocking) due to "noise"?

You should try a half tank of 87 fuel and see how the J&S USG responds.

Steve

Steve

MASSIVE TYPE IV · Post by **MASSIVE TYPE IV** » Mon May 13, 2002 3:31 am

The adjustment is easy I did it like this:

With the timing set per the dyno (26 deg) I revved the engine without making any timing adjustments and adjusted the sensitivity to get rid of piston slap and pushrods etc. Then I ended up jacking the timing to 44 degrees and watched it retard to near 30 with the light, it even cleaned up my idle a bit. I plan on making a harnass for each of my cars so I can transfer the unit and do the same on the dyno...thats why I bought it anyway, plus now "DAN" cannot say we have no way of sensing inaudible ping...

------------------
Jake Raby
Raby's Aircooled Technology
www.aircooledtechnology.com

Tom Perso · Post by **Tom Perso** » Mon May 13, 2002 3:35 am

<B>plus now "DAN" cannot say we have no way of sensing inaudible ping...
</B>

LOL!!!!

Good job Jake, I do like that setup and it it's nice to see some real results from it. It is on my "wish list" for my motor, but not in the near future.

So many toys, so little money...

Later,
Tom

JohnConnolly · Post by **JohnConnolly** » Mon May 13, 2002 4:48 am

Jake,

just curious, did this engine have Chromoly or Al puhrods?

John
Aircooled.Net Inc.

MASSIVE TYPE IV · Post by **MASSIVE TYPE IV** » Mon May 13, 2002 5:07 am

Chromoly....They were cryoed however and set to zero lash, just so the pushrod could be turned, thats how I adjust 99% of the chromolys....The Aluminum pushrods would be better, they are quiet as a mouse..

------------------
Jake Raby
Raby's Aircooled Technology
www.aircooledtechnology.com

Tate · Post by **Tate** » Mon May 13, 2002 5:11 am

I bought one of these, can't wait to get my motor in the car and try it out. I am going to run a 2275 with WEb 121/125 with high compression on pump gas with the Safeguard, then put in some race gas for the track. I have talked to John about this motor, and with the Safeguard I think I'll be able to run it on pump gas. I am just waiting on my chassis brace from TGFab, then in it goes.

Joe Goldthwaite · Post by **Joe Goldthwaite** » Mon May 13, 2002 9:26 am

How does it know which cylinder is firing? Does it use it's sensors to listen or do you have to have a different ignition system so it can tell the active cylinders?

Shad Laws · Post by **Shad Laws** » Mon May 13, 2002 9:40 am

Hello-

How does it know which cylinder is firing?

It doesn't. It just knows that you have four cylinders, so every fourth pulse belongs to the same cylinder. It'll internally label a 1, 2, 3, and 4, but it has no idea how those actually match up to the true #1, #2, #3, and #4.

Take care,

------------------
Shad Laws
LN Engineering
http://www.lnengineering.com

BergRace · Post by **BergRace** » Mon May 13, 2002 10:44 am

So this must be a direct fire(or waste spark) setup then, will not work with a dizzy?
How else could it dial back a cylinders timing seperatly?

------------------

P.J.Berg.

Joe Goldthwaite · Post by **Joe Goldthwaite** » Mon May 13, 2002 12:14 pm

Ah... Thank you John. The simple way you put it made it click and make sense. (Not that I don't appreciate Shad's answers. They're always informative.)

Does the box include the knock sensor? Where do you mount it on a Type 1?

JohnConnolly · Post by **JohnConnolly** » Mon May 13, 2002 12:40 pm

simpleman's details.

the Safeguard is installed with a hot and ground, ignition in (points or trigger), ignition out (to coil or CDI), and knock sensor wire.

I mount the knock sensor in the case. In fact, every engine I build I go ahead and pre-drill the bellhousing for the knock sensor, for "future use" (that's how much I believe in it). It takes 5 minutes, and saves hassle later on.

The kit does include a knock sensor. I am getting extra sensors so you can put the sensor in each engine, and just swap out the CPU (it's only a one wire connection to the sensor). It's EASY to install.

If it senses detonation, it delays the trigger to THAT cylinder's firing device (coil or CDI) next time around.

John
Aircooled.Net Inc

wilson · Post by **wilson** » Mon May 13, 2002 2:31 pm

Hey - where can one find more information on this safeguard> Who is the company making it?

thanks - Wilson

marco the steem engine · Mon May 13, 2002 6:29 pm

I want one!!!
But i have wasted spark DIS system, when is the new one comeing out?

scrawl · Post by **scrawl** » Mon May 13, 2002 10:14 pm

would this work well in a turbo application?? sounds like it...