whats the relationship between the two like more throttle means more ignition advance or what?

 

anybody?

 

What the hell are you talking about ? I didn't see him mention octane anywhere in his post.

Anyways, your question depends on what kind of engine management system the car in question is running. Are you talking about a stock honda for example or a VW/Audi running motronic...they'll be very different.

 

i was just wondering if the timing got advanced when ur at wot and if i had low voltage on the tps if the timing would get more advanced or less.

 

stock honda electronics

 

Ignition is controlled by many different factors. Vaccuum under load increases and will advance vaccuum advance, the ECU will monitor sensors such as O2, knock sensors, etc. IT all depends on the vehicle year model, pre OBD, OBD1, OBD2. If you are trying to rig a retard mechanism for n20 off the TPS, forget it. Is that what you were getting at?

 

short answer is: as you gradually open your throttle angle you gradually increase your timing curve to help the motor build momentum and not stumble.

best way to describe is if you used a timing value of 30 degrees for any angle of throttle vs. using an interpolated value which starts lower and works its way up to 30 degrees when you get ot full throttle. The latter will accelerate the motor quicker, the former will stumble becuase the motor will fall flat on its face then try to pickup.

Greg


[Modified by CHEETAH, 12:58 AM 11/9/2002]

 

so if i continue with the low tps voltage will the car detonate with nos or boost? it seems to run a tenth quicker in the 1/8th mile with the low voltage on the tps and check engine light. its a 89 honda civic.

 

TPS and MAP signal tell the ECU where they are at, from there the ECU will calculate how much fuel to dump.. What do you mean low voltage??? Like if you take off your TPS and open up the throttle wider than you TPS? or adding resistence to the signal... Setting your voltage lower should have no affect ur 1/8th, it should just make it run shitty... If the TPS is reading a lower voltage than it should and the ECU thinks it it doesn't have to dump as much fuel, if you run nitrous or boost your just goin to make ur motor more prone to detonation.

 

i just adjust the tps by twisting it up or down because i had a jg throttle body and it had no tps. i look at the voltage thru the afc and when it is set with low voltage it dumps a lot of fuel and throws a code for the tps. the air to fuel always hangs in the rich area even when cruising. and the thing about the 1/8th mile my car went 9.7 to 9.6 with just changing the voltage on the tps. i was just wondering exactly whats going on when i run like this.

 

Well if it really is making your car run rich it's not really going to hurt it.. You would much rather want to run this way then lean. What kinda A/F meter do you have???