I blew my motor within 48 hours of installing my test pipe and exhaust.

I can say it did pull ALOT harder and shot some wicked flames.

LOUD as ####

 

I think anyone installing a test pipe without verifying there af ratio is just asking for a new engine.The car will run much leaner with a test pipe.On a supercharged car(at stock boost levels) i doubt there would be all that much of a gain.Turbocharged is a different story.If you must install a test pipe then dont hammer it without checking youre mixture with a wideband.

 

oops

 

Hold on a sec our cars have to 02 sensors, and if you dont have a cel the computer will think that everything is like stock, So how is this going to effect anything?

 

More exhaust flow leans out the af ratio.And yes we have TWO 02 sensors.The second one youre referring to is for cat monitoring (aka the exhaust emissions cop).

 

your post doesnt make much sense. first of all you haven't even been back to the dyno since you added these parts and you are "guesstimating" your A/F ratio and your HP figures (per your signature). secondly, you contradict yourself. your car being faster at WOT would mean that your A/F ratio is leaner, providing a more efficient combustion which would give you more power (til you get too lean and you lose power and blow your motor from detonation)

it's not safe to spread information that you really don't have much sense about. as you can see, quivers blew his motor from adding these mods and not checking his A/F ratio.

adding a test pipe will lean your car out, as your exhaust will flow more freely, thus needing more fuel to compensate for the increased air. fuel + air + spark = power. less fuel would need less air which would make less power.. and vice versa

 

Here is what I don't get. We have two 02 sensors, and the "primary" that is in the header is for A/F ratios and the secondary one "In cat" is for emissions so how is that going to drastically change my A/F ratios?

 

The rear 02 sensor is there to determine if the convertor is working. Installing a test pipe requires either a spacer on the 02 mount to mechanically fool the PCM or a electronic 02 simulator.

The change in the exhaust system is going to effect the AF ratio.

You can not mount a wideband 02 sensor (that reads actual AF ratio) in a spark plug anti-fouler or a test pipe that has a built in spacer. The wideband will not read correctly. You also may damage the sensor do to condensation in the exhaust system.

 

It means pedal to the metal....by the way I have AEM UEGO wideband gauge unit to watch my A/F mix ratio....a very nice investment for tuning and safety purposes.

 

I ran a test pipe and exhuast on my stock comptech w/ AC

was hitting HIGH 13 AFR's when vtec kicked.