Test Pipe Tune

[aogram035]

I'm a little new to the whole performance game and am looking for input....

Here's the breakdown:
1997 LS motor
password jdm intake
Apexi WS2 cat-back

Within the next couple weeks i'm going to be throwing some 4-1 dc headers on and hopefully a test pipe. I know these mods are going to make my car run lean and this is where i get a little lost....

is it necessary to get a tune or hondata or something if i'm going to run the test pipe?

[daveedd357]

Installing an intake and exhaust will cause a lean condition. Anytime airflow is changed around the engine, the car will have to be tuned. Honda are generally equipped with map sensors. Map sensors only know air pressure not flow. So by changing airflow (intake,header,exhaust) your ecu would have to be reprogrammed to match those new airflow characteristics.

[Chillmatic]

Don't get test pipe gonna make ur car sound like complete shit

[JDM 860]

lisen to dave he is sick with it n knows his shit

[aogram035]

Installing an intake and exhaust will cause a lean condition. Anytime airflow is changed around the engine, the car will have to be tuned. Honda are generally equipped with map sensors. Map sensors only know air pressure not flow. So by changing airflow (intake,header,exhaust) your ecu would have to be reprogrammed to match those new airflow characteristics.

thanks for the input bro, def helping out...you know how i would go about doing this?

[Chillmatic]

Daves a tuner he can do it

[daveedd357]

1997 LS so I am assuming matching obd2 ecu. If that is the case you will have to get a jumper harness and obd 1 ecu. For a road tune including socketing of the ecu the price is 280. Within that price I would calibrating tps, synching timing and making sure that all sensors are installed correctly. I would then ride along using a wideband o2 device to properly set timing and fuel at all load ranges. Please call for any further info. Dave 8608050968.

[aogram035]

1997 LS so I am assuming matching obd2 ecu. If that is the case you will have to get a jumper harness and obd 1 ecu. For a road tune including socketing of the ecu the price is 280. Within that price I would calibrating tps, synching timing and making sure that all sensors are installed correctly. I would then ride along using a wideband o2 device to properly set timing and fuel at all load ranges. Please call for any further info. Dave 8608050968.

alright good looks, i'll be giving you a call once i get all the parts in and work up some cash. thanks

[AWDream]

Installing an intake and exhaust will cause a lean condition. Anytime airflow is changed around the engine, the car will have to be tuned. Honda are generally equipped with map sensors. Map sensors only know air pressure not flow. So by changing airflow (intake,header,exhaust) your ecu would have to be reprogrammed to match those new airflow characteristics.

and just how drastic do you think the changes from a cold air and cat back will be? the car will not have to be tuned. intakes and exhausts on otherwise stock cars will make less than 10whp combined.

map sensors know pressure, correct. last i checked, b series motors weren't factory turbo, so what "pressure" is actually in there? the purpose of a map sensor is to measure air flow.

call me crazy, but i wouldn't go nuts about getting a tune for an i/h/e car. that's the beauty of an ecu and the sensors that go with it- they can compensate for minor changes in air flow.

[Chillmatic]

^ thats what i was tellin him..

[daveedd357]

I hate the internet sometimes. You just stated that the map sensor knows pressure. Whether it is vacuum,atmospheric, or boost, pressure is pressure. The mass of the air being moved has nothing to do with the pressure of the air. Cars that use speed density systems(map sensors) cannot compensate for changes in airflow, mass air flow systems can. Sure when driving the car under low load conditions the car is going to be in closed loop, in which it will correct itself to a point. What happens when that car enters open loop and is no longer relying on the o2 for corrections? It is going to go lean. Especially when you have changed the flow of air through the engine. How many times have you dyno tuned a car while testing different intake tube designs and were able to chart gains and losses of 10 plus hp and 1 point in air/fuel ratio? To everyone, please back up your post with real experience and data.

[AWDream]

I hate the internet sometimes. You just stated that the map sensor knows pressure. Whether it is vacuum,atmospheric, or boost, pressure is pressure. The mass of the air being moved has nothing to do with the pressure of the air. Cars that use speed density systems(map sensors) cannot compensate for changes in airflow, mass air flow systems can. Sure when driving the car under low load conditions the car is going to be in closed loop, in which it will correct itself to a point. What happens when that car enters open loop and is no longer relying on the o2 for corrections? It is going to go lean. Especially when you have changed the flow of air through the engine. How many times have you dyno tuned a car while testing different intake tube designs and were able to chart gains and losses of 10 plus hp and 1 point in air/fuel ratio? To everyone, please back up your post with real experience and data.

i'm just going to ask you one question. how dumb do you THINK i am?

i know very well how speed density as well as MAF systems measure air. i have owned both. i have converted cars from one to another.

MAP sensor cars can 100% compensate for changes in airflow. what do you think a difference in temperature, barometric pressure, humidity, or elevation are? changes in airflow.

I don't advertise this anywhere, but I used to work at Pruven Performance. They're no Dave's Tuning, but maybe you've heard of them. I've dyno tested and tuned more cars than you've blown up. So, before you start taking stabs at my credibility, you may want to do your research about what you're stabbing at.

[Chillmatic]

Damnn douggie fresh i never knew that shitt.. hook a brotha up with a tunee haha

[AWDream]

You might wanna go to Dave, he seems to know a lot better than I do.

[daveedd357]

This stops here. Before I slip at tounge/ finger.