2 Bar Map

[stanno]

Does this map sensor come on all 3s-gte engines...? i'm seeing online that if plugged into a stock n/a toyota 5s ecu it will read boost providing it wont exceed 12psi... is this fact...?

[white90dx]

Originally Posted by stanno

Does this map sensor come on all 3s-gte engines...? i'm seeing online that if plugged into a stock n/a toyota 5s ecu it will read boost providing it wont exceed 12psi... is this fact...?

There are 2 bar and 2.5 bar MAP sensors that came on various 3s-gte versions. Make sure you get the 2 bar version so you don't have to go too much larger on your injectors.

Keep in mind that once you put the 2 bar sensor in place, your ECU will think you have significantly less air going into the motor at any given time, so you need to have bigger injectors and some sort of external tuning (SAFC, eManage, etc) to make up for it.

-Charlie

[Wangan]

Charlie, is there a way to wire out my maf?

[white90dx]

Originally Posted by Wangan

Charlie, is there a way to wire out my maf?

There are a few ways... 3rd gen 3s-gte ECU conversion, AP Engineering PowerFC (discontinued, hard to find), HKS VPC (discontinued) or custom wired standalone ECU or maybe even a custom wired MAF from a later car and an SAFC.

-Charlie

[stanno]

Originally Posted by white90dx

There are 2 bar and 2.5 bar MAP sensors that came on various 3s-gte versions. Make sure you get the 2 bar version so you don't have to go too much larger on your injectors.

Keep in mind that once you put the 2 bar sensor in place, your ECU will think you have significantly less air going into the motor at any given time, so you need to have bigger injectors and some sort of external tuning (SAFC, eManage, etc) to make up for it.

-Charlie

ok, i understand how the 2bar map, bigger injectors and tuning devices go hand in hand now. but in regards to ignition timing... i've seen ppl locally, when they turbo n/a toyota motors, they manually turn the distributor in the opposite direction of the engine's rotation to retard timing i assume. is this method of altering the motor's ignition timing for boost safe ?

[white90dx]

Originally Posted by stanno

ok, i understand how the 2bar map, bigger injectors and tuning devices go hand in hand now. but in regards to ignition timing... i've seen ppl locally, when they turbo n/a toyota motors, they manually turn the distributor in the opposite direction of the engine's rotation to retard timing i assume. is this method of altering the motor's ignition timing for boost safe ?

That's the most basic way to do it. You will want to use a timing light and check/adjust the timing carefully if you do it that way. That will adjust the timing at every operating condition of the motor. Some piggy-back ECUs can adjust timing, I think.

Another thing that will help is running 91 or 93 octane fuel (whatever is the highest available in your area). This may allow you to avoid retarding your ignition timing, or at least reduce the amount you must adjust things.

-Charlie

[stanno]

Originally Posted by white90dx

That's the most basic way to do it. You will want to use a timing light and check/adjust the timing carefully if you do it that way. That will adjust the timing at every operating condition of the motor. Some piggy-back ECUs can adjust timing, I think.

Another thing that will help is running 91 or 93 octane fuel (whatever is the highest available in your area). This may allow you to avoid retarding your ignition timing, or at least reduce the amount you must adjust things.

-Charlie

okaaay, understood! so you said that manually retarding the timing will do this for every engine operating condition, so will that mean off boost the motor would run crappy & maybe consume more fuel ?

[white90dx]

Originally Posted by stanno

okaaay, understood! so you said that manually retarding the timing will do this for every engine operating condition, so will that mean off boost the motor would run crappy & maybe consume more fuel ?

Bingo. Which is why you don't want to use it as your main timing tuning tool.

-Charlie