383LQ4SS

iTrader: (33)

I have tried the reverse timing tricker mod and it seems to work very well. I used a specific resistor and got about 3-4 degrees of retard. The Scanmaster showed it was 140 degrees IAT. I think Im going to put a variable resistor(potentiometer) in the plug and try that out. I should be able to dial up the IAT I want and effect timing as much or as little as I like( in theory). Anyone try this. I have a 6k potentiometer in hand and will try it soon. The only thing I can think of off hand is the pot starts at 0 ohms and goes to 6k. At 0 would there be a posibility of damaging the computer? If so.....i guess I would have to be careful and adjust it while reading the scanmaster to be sure not to go too far off scale. Guess I could mount it in the cockpit so I can dial up the IAT temp I want as I watch it.

Feedback? Experiances?

<small>[ April 04, 2002, 10:28 PM: Message edited by: 383LQ4SS ]</small>

BlackWS6LS1

iTrader: (5)

Get a 4k resistor and put it in series with a 0 - 2k pot. that way you never short it to zero. Or even 1k resistor and 0-5k pot. Of course you understand what I'm saying. Later.

Tom

383LQ4SS

iTrader: (33)

Aha! Very good idea. Thats exactly what I needed. Im putting it in tommorrow. Ill let you know how it goes. Thanks again. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

383LQ4SS

iTrader: (33)

Well....I did it. I used a 340 ohm resistor inline with the 6k resistor. I scroll the LS1 scanmaster until it shows ATS (air temp sensor) and then turn the dial. Goes from 38 degrees to 154. Seems to be about a three degree differnce on timing from one end of the scale to the other (38-154). Ill do some more runs and log the differences. This should atleast hold me over until MSD or Ramchargers comes out with thier timing controllers. <img border="0" alt="[Burnout]" title="" src="graemlins/burnout.gif" />

Dipstick

383LQ4SS, did you get any more dinfinitive results with the timing tricker pot?

383LQ4SS

iTrader: (33)

well..all it really did was confirm I was pulling out as much timing as possible. If I went to about 120 degrees F on the IAT it pulles about 3-3.5 degrees out. If I continued to increase IAT i did not get added decrease in timing. But it was nice to know I was taking out all I could. Or just enough if I only wanted a one or two degrees. Does that answer the question? <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Ryan K

iTrader: (11)

Ah, interesting thoughts...
Now it you just had LS1 Edit, you could make your own from the cockpit adjustments to timing for running Nitrous! I am sitting here looking at the IAT Vs. MAP vs. Timing curves as I write this.

The factory PCM is set to remove 3 degrees of timing at WOT above 50 degrees celcius. That means if you turn it anywhere above 50c it will only pull the 3 degrees. BUT it you had LS1 edit, you could set the tables any way you wanted for example, at 50c -2, 60c -3, 70c -4, 80c -5. It would be very easy to do!

So, now that you guys thought of it I am off to the nearest radio shack!

Ryan K.

383LQ4SS

iTrader: (33)

Holy crap....no way! I never even thought about that. That opens a whole new ball game. I have LS1 scan master that I watch as I set the IAT temp in the cockpit. If I knew exactly what temp would bring what timing in and could set it...that would be great. Set for some really good timing advance with the IAT at 30 degrees F to run NA..then set it for 3 degrees less at an IAT of 80 F to run a decent shot and then even set it for 6 degrees retard at 120 F to run a much larger shot....or anywhere in beteen. Would this work? Basically it would just be seting a known value of retard so you could select it when desired. Hmmmmm?

Ryan K

iTrader: (11)

I just wired it up and am looking into the tables right now....

Trans Am WS6 420

iTrader: (14)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 383LQ4SS:
<strong>Holy crap....no way! I never even thought about that. That opens a whole new ball game. I have LS1 scan master that I watch as I set the IAT temp in the cockpit. If I knew exactly what temp would bring what timing in and could set it...that would be great. Set for some really good timing advance with the IAT at 30 degrees F to run NA..then set it for 3 degrees less at an IAT of 80 F to run a decent shot and then even set it for 6 degrees retard at 120 F to run a much larger shot....or anywhere in beteen. Would this work? Basically it would just be seting a known value of retard so you could select it when desired. Hmmmmm?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Aw, ****. That post right there may have just swayed me from having my computer done to buying LS1edit.... BASTARD! <img border="0" title="" alt="[Razz]" src="gr_tounge.gif" />

383LQ4SS

iTrader: (33)

Hehe..I know. I think it will be fine. Ive been driving around for a while with the IAT potentiometer ( 10k ) and just selecting the temp (timing) I want. I would just kind of guestimate what temp gave what timing...But if it where mapped out and I knew it..hell that would be just like running a timing control box. SWEET!

Dipstick

383LQ4SS, you could get a rotary switch with say 13 positions and put known values resistors between each post and make a numbered plate for behind it to indicate the timing retard/advance.

I used this instead of the the pot that came with the MSD Boost Timing Master I had on my turbo/injected VW sandrail. I could tell how many "clicks" retard I was putting in by the number of clicks off of full counter-clockwise I was. If I was running 2nd gear only hill, I would have it at 5 clicks. If I was running a 3rd gear hill, I'd click in 2 more clicks. If it was hot, I'd click in more.

<small>[ June 11, 2002, 05:04 PM: Message edited by: Dipstick ]</small>