Hey guys i've heard rumors, I believe about Bushar Racing, having a rear O2 simulator to allow for the use of testpipe/racepipes (dropping the cat)

Can anyone confirm this with a price? Or possibly another method to allow for the use of a testpipe/racepipe. Without loosing performance (as Bushar tested) and without throwing a code or MIL

 

After reading you question I called Buschur and asked. They are in the process of perfecting the O2 simulator. They said it should be finish in about a week. They told me to keep an eye out for it on the website. He didn't say how much it was gonna be but my 2002 Z06 sensors (2) were 29 bucks each so I dont see the Evos being more espensive.

They also said that it would not effect the driveability of the car. It wont make it knock or stall or idle funny or anything to that matter. The only thing he said that would be anoying for a bit is the CEL. But he also said if you drive around for a while it will turn off, then back on, but do not be alarmed, no harm done.

I ordered the 3" catback SS exhaust and the 3" downpipe which comes witht he 3" test pipe. I will let you know how everything works out without and with the O2 simulator.

 

cool thanks, did dave say anything abotu performance gains with only a test pipe? compaired to his last pull where he lost power?

 

Our 2.5" and 3" Test Pipe designs are guaranteed not to trigger a check engine light. Of course we won't publically show how, but when you receive the test pipe, you'll see how it works.



Thanks

Darryl

 

Any one want to sell the Simulator alone?

 

?? I am a little confused.. I thought Bushar said that the EVO ecu was very similar to the 2g DSM ecu... when the CEL light comes on in a 2g, the car runs in "safe mode" and runs like *** performance wise.

So wouldn't the CEL light hurt performance of the EVO since it would go into "safe mode?"

 

My thoughts exactly... I want Zero performance loss and all to gain

 

According to the guys at Buschur, I talked with Dan, no performance loss with CEL tripped. I questioned it as well, it just didn't seem right.

Call and ask. 440-839-1900. Ask for parts. Usually Dan will answer there.

 

If so, that is GOOD news!!!

 

Well waht i wanna know is, last time Bushar tested the car he lost 1HP on the dyno and gained 5 lbs of torque. I want to see HP gains from removing the cat, not numbers staying the same or dropping. If they stay the same i'd rather leave the cat on the car becasue out here in cali it's a nasty fine for no cats. If the evo will output like all other turbo cars when the cat is removed then i'm dumping mine and buying the simulator.

 

A test pipe will make a biggest difference when the cat is not
designed well (not the case in evo) or when its old (especially
if 02 are above .9, it wil clog up the cat in no time)

Leo

 

yes i understand the physics of air flow, and restrictions... My point being when you remove a cat completely it's not suppose to reduce hP, becasue you can gain NOTHING but flow. The exhaust will have no restriction at that point. I'm sure the stock cat is a high flowing cat of some sort but my question still stands how can you possibley loos HP when removing a restriction for the exhaust system.... only resonable answer is that the ecu is being affected and "running in safe mode" I'd like to see some figures on the car running a testpipe and simulator with no other mods. This will answer everything.....

PS on turbo'd cars O2's need to be above .90 or you will burn the motor up as well as your turbo's bearing.... Optimal is around .92-.94 volts

 

Wow there is alot of misguided info in this thread!

First off, the CEL tripping in and of itself does not guarantee a "safe mode" or loss of performance. OBDII cars have soft codes and hard codes - soft codes cause a CEL but do not alter performance, hard codes trigger the CEL and generally hamper performance in some way (i.e. lower rev limiter, lower or no boost, minimal ignition advance).

As for O2 readings, you cannot ever state that by itself, an O2 reading of .90 or higher is good tuning on an OBDII car - there is much more involved to tuning than 02, and I for one would argue that 02 voltage is probably the least reliable thing to tune for on an OBDII car.

Just hang out a bit until the various firms release their dataloggers specifically for the car- it will be a very wise investment.

 

Ya i don't know I jsut happened to be talking to the fastest Stealth and he thought that a tuend car should be at .90-.94 maybe he knows nothing then huh.... I'm not, nor is he, stating that an O@ reading of .90-.94 will make ur car "TUNED" however it is the optimal recommended ratio for combustion. How many big named companys have stated that ratios of 12.5:1 or lower .90 voltage readings are where cars perform best at? This statement is ONLY as a basic guideline all cars are different but if one is looking somewhere to start that is generally where you want to be.

Second the reason for the assumption is that Bushar tested an Evo 8 with a testpipe and they lost performance, is there any other explination you can come up with for the loss in performance?

 

from my experience,

o2 are one of the things I used to tune my car,
also used timing and EGT.

would say that most go by timing and shoot for 18-19deg,
in my car (94 eclipse gsx sold) I got to 19deg at about .86V
and 870C. The car ran 12.3 with a small 16G with almost
instant boost response, small 16G is the smaller then EVO turbo.

Look at your ehxust tip and you will see black carbon build up
you will find more in you cat, wait for a 2 years and your cat
will flow much less then it use to, the carbo will also build up
on your valves and in time will help with detonation.

Good luck
Leo