performance resistors

[bmw2002nut]

I see alot of performance resistors for sale very cheap and advertising up to 20 hp gains. What it looks like is just a resistor that you put in the Air Intake Flow sensor plug that tells the ECU that the engine is under more of a load than it actually is, thus advancing the timing and adjusting the air fuel mixture. They sell these for all types of cars with fuel injection and i would like to hear from anyone that has tried one or knows more about them. Im kind of hesitant to put one on if im not sure what all the effects it will have are. Thanks!!

[jeffs_GTP_sleeper]

Originally Posted by bmw2002nut

I see alot of performance resistors for sale very cheap and advertising up to 20 hp gains. What it looks like is just a resistor that you put in the Air Intake Flow sensor plug that tells the ECU that the engine is under more of a load than it actually is, thus advancing the timing and adjusting the air fuel mixture. They sell these for all types of cars with fuel injection and i would like to hear from anyone that has tried one or knows more about them. Im kind of hesitant to put one on if im not sure what all the effects it will have are. Thanks!!

Save up and buy an intercooler instead.

[fast98gtp]

there's something on zzperformance.com that talks about that. you should check it out before buying it.

[99_gtp]

you can do that i have done it and it helps a little i use a 33k resistor i think but just save up and but something usefull

[jeffs_GTP_sleeper]

Here is the information from ZZP's site:

Air temp modules
An air temp module is simply a fancy packaged resistor made for people who don't know any better. Companies like SLP offer this for ~$25 and many are lured into purchase by it's low price and ease of install. It tricks your PCM into thinking it's cold outside and therefore "optimizes timing". In reality it does little to nothing and cannot change commanded timing by more than 1 degree (and that's on a hot day where you probably can't use the extra 1 degree of timing anyway). Save your money and don't buy it. If your curiosity gets the best of you, buy an 8k resistor from Radio shack and save $24.50

[bmw2002nut]

Thanks for the info yall. It is much appreciated. They are goin on ebay for between 5 and 25 bucks. For a .50 cent resistor, thats pretty good mark up.

[kilroypr]

IT is important what the ECU(PCM) percieves as input but more important is the atmosferic conditions. What is the use to advance the timing when the day or the car or intake air flow is too hot. Instead of getting more timing you will get more KR since the car will knock more because it might be injecting more fuel that would detonate quicker than expected due to the higher temps. The PCM will then KR to protect your car. More KR means less power