Custom OS#5

[ScarabEpic22]

Thats an interesting way to do it, I like it though. You might get some false KR and spark being pulled when its using the outer IAT and the air is much hotter than the PCM is actually reporting.

I want to get a Maggie on my SS, hopefully I can afford it some day.

[Frost]

Using the two & switching while logging dynamic air temp. Since this is what the pcm uses for airmass estimation.

I haven't looked at that on the car. I haven't had enough time with it yet, I actually have some more tests and data to collect. This customer is one of my few 'sponsored' customers. His cost is that I tinker with things on his setup

Thats an interesting way to do it, I like it though. You might get some false KR and spark being pulled when its using the outer IAT and the air is much hotter than the PCM is actually reporting.

I want to get a Maggie on my SS, hopefully I can afford it some day.

Precursory logging showed that when the IAT was not heat soaked, (high way cruise, etc) that when compared with the unit in the nose, only showed about 3-4 deg F difference. By two psi the methanol is on and the heat soaked sensor is reading lower than ambient. With two meth nozzles pouring it in (and the IC working well) the IATs just get back to ambient after about 3-4 gears put together at WOT anyway. Because of this, the transition back to the sensor in the nose is smooth and uneventful.

[brokenfly]

i use the iat on a relay method...it works okay...pulls timing only on spray,leaves my motor tune unaffected,and even allows me room to tweak afr by adding or subtracting fuel for those pesky in between jet sizes...

i use my 2 stage window's switch first stage to control the n2o solenoid,and the second stage to bring the fuel solenoid in 100 rpm's sooner to curb the dreaded lean spike a little...

the only bug in the drink is an occasional delay shown in the logging when the iat trips and when the actual rpms spike from the nitrous activating...

doesn't happen but maybe every 4-5 passes...
i think i need a relay that has a quicker coil for the low voltage or amps the iat sensor lives on...

[BRD-PREY]

Id like to know if this is possible as well.

Can COS5 be used to add timing when PCM pin #56 is grounded instead of pulling timing for the Nitrous?

Id like to add timing when the pin is grounded for my methanol system and then go back to normal spark timing without the meth.

[joecar]

Looks to me like it can't do that... the range of timing to pull is 0-20 degrees (i.e. not negative).

[BRD-PREY]

If its a multiplier if the field was set to accept it wouldn't a .90 or .87 work?
Ed

[L31Sleeper]

Where is the COS5 Tutorial ??

[GAMEOVER]

Where is the COS5 Tutorial ??

There is none. Only a long, long, long thread...
Here:http://forum.efilive.com/showthread....99-Custom-OS-5

[L31Sleeper]

[joecar]

See posts 243, 244, 246 of this thread.