What are your experiences w/ the "free" IAT mod?
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From: Showing Italians the power of LS1
What are your experiences w/ the "free" IAT mod? I just performed the "Free" Intake Air Temp sensor (IAT) mod. This mod is usually performed using a 4700 Ohm Resistor, fooling the computer into advancing timing a few degrees because it "saw" 57 degrees F. I saw on www.installuniversity.com they reviewed the SLP IAT timing tricker, and discovered the resistance of that unit was 8120 Ohms fooling the comp into seeing 36 degrees F. I then performed the mod using a variable resistor tuned to 8120 Ohms, and the car seems to perform okay, but it's hard to tell any performance diffrence because when I did this mod, I also installed my new airbox and SLP MAF. I don't have auto tap or LS1 Edit to look at the advance/retard numbers. Has anyone had bad/good experiences with this mod? the writeup on my car is on my site in sig. Check it out and tell me what you think!
Re: What are your experiences w/ the "free" IAT mod? back to back passes about 15 minutes apart, nearly identical 60fts and e.t.'s i picked up half a mph from it. a full tune with a maft or ls1edit would be better but if you dont have access to that or youre a budget racer its a good mod. half a mph is about 5hp. 5hp for a buck cant beat it.
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From: Troy, AL
Re: What are your experiences w/ the "free" IAT mod? Pretty simple really. IF you need more timing advance and your IAT is causing it to drop, then this can be an effective mod. But, if your timing advance is already in the ballpark (~28-29 or so by 6000 RPM) then this mod isn't going to do much for you.
I like it for consistancy. I don't have to worry about my timing fluctuating due to IAT sensor readings.
I like it for consistancy. I don't have to worry about my timing fluctuating due to IAT sensor readings.
Re: What are your experiences w/ the "free" IAT mod? Never go to the track without one (4.7k ohm, 1/2 watt resistor) <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Re: What are your experiences w/ the "free" IAT mod? BTW:
Dyno of my car with 500 miles on the OD:
Stock
282.9/305.7 SAE, 291.4/314.8 actual
added Timing Tricker (!TT) & Remove Air Filter
292.4/314.6 SAE, 301.2/324.0 actual
<small>[ February 04, 2003, 06:21 PM: Message edited by: WILWAXU ]</small>
Dyno of my car with 500 miles on the OD:
Stock
282.9/305.7 SAE, 291.4/314.8 actual
added Timing Tricker (!TT) & Remove Air Filter
292.4/314.6 SAE, 301.2/324.0 actual
<small>[ February 04, 2003, 06:21 PM: Message edited by: WILWAXU ]</small>
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From: Goldsboro NC
Re: What are your experiences w/ the "free" IAT mod? i recently ran my car on the dyno with and w/p the !IAT...pass with the !IAT= 293.1 rwhp pass w/p !IAT=299.3 rwhp
i think alot of it has to do w/ my car is basically already running full timing...i think around 30 degrees so it wasn't helping me at all...might be a different story on a hot day
i think alot of it has to do w/ my car is basically already running full timing...i think around 30 degrees so it wasn't helping me at all...might be a different story on a hot day
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From: flordia
Re: What are your experiences w/ the "free" IAT mod? wilwaxu what do you mean actual 302?? I thought SAE was the best way to dyno <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
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Re: What are your experiences w/ the "free" IAT mod? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by roadrunner-r:
<strong> wilwaxu what do you mean actual 302?? I thought SAE was the best way to dyno <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Actual, as in what the car actually pulled without a correction factor (such as SAE)...
<strong> wilwaxu what do you mean actual 302?? I thought SAE was the best way to dyno <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Actual, as in what the car actually pulled without a correction factor (such as SAE)...
Re: What are your experiences w/ the "free" IAT mod? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by roadrunner-r:
<strong> so if i dynoed 328.6 SAE,I should be 337 not corrected? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">SAE is a correction factor. It takes weather conditions into account and "balances" the numbers out against a norm.
So, on the day that I was on the dyno the weather was better than the norm, so my car made more HP. SAE correction lowered my HP numbers. If it would have been a poor weather day, it may have corrected up.
It's a way to compare dyno runs made on different days / different conditions.
<strong> so if i dynoed 328.6 SAE,I should be 337 not corrected? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">SAE is a correction factor. It takes weather conditions into account and "balances" the numbers out against a norm.
So, on the day that I was on the dyno the weather was better than the norm, so my car made more HP. SAE correction lowered my HP numbers. If it would have been a poor weather day, it may have corrected up.
It's a way to compare dyno runs made on different days / different conditions.
