Also, boost leak test came back solid. No leaks present, had no prob holding 20psi. I understand where the loss in power came from now and it makes sense.

The exhaust is so free flowing, i am hitting higher load cells and seeing less timing.

I will say, now that this is sorted out, that the Buschur racing TBE is amazing. It is quiet at idle and cruise, but killer at WOT. Spool up is alot better and once i fix my maps, im sure power will be extracted.

Fitment is spot on and all the hardware is included that you need (even subframe brace spacers to clear the DP)

Only gripe i had was the packaging...It was packaged with shredded paper and nothing else. I had to clean out the cat area to make sure no paper got stuck in it, the rest i just blew out when i started the car.

Overall, its great, but it will be even better once i can extract more power from it.

I am already loving the faster spool-up though!

 

So what exactly was the problem?

 

what exhaust was it. whatever it is sucks

i gained a lot of power from the vishnu sig. full 3" even with hfc untuned. gas mileage sucked though.

 

With all the frree flow from the exhaust, my car was able to hit alot higher load cells where the ecu map has less timing available. This caused my car to lose some HP/TQ. I have to tune for this exhaust by adding the fuel around spool-up and adding some timing in the load cells (near 300%) and mid RPM.

The exhaust does not suck, it is actually one of the most free flowing available...My car just hit higher loading with less timing available...

 

how come no one else had this happen to them? i bolted my tbe on and felt immediate power in the lower and espeically the upper rpms, and quicker spool. jw?

 

I agree with this guy ^^^

I bolted mine on two days and felt more power, better spool, and response immediately. I will be installing my wideband this weekend as well as the Perrin EBCS and start tuning.

Hope you get to tuning soon

 

Razorlab hit the nail on the head.

No offense, but the majority of the people on this forum may not exactly be well known for their meticulous before and after datalogging. Exhausts will always make people think their car is faster, even if it's not, because of the noise. And the placebo effect too, people always expect more power from an exhaust, and are therefore more likely to percieve an increase even if there wasn't one.

Just tossing out some ideas here. The OP did the right thing, and wasn't afraid to admit that something just wasn't right. A good upgraded exhaust (over stock) can provide as much of an aiflow increase as a set of cams, and I think most poeple would agree that cams would warrant a retune. This was never a problem on the DSMs, since the load levels only went up to 2.1 grams/rev. Once you were over that all changes were accounted for in the airflow metering, your target AFR and timing would remain unchanged. The EVO ECUs, since they were designed for larger turbos, go much higher, making it possible to land on fuel/timing map cells that have no yet been properly set up, since you were just previously unable to reach them.

 

I just bought a TBE... now I'm skepticle to install it without a tune...

I may actually loose power? Gas mileage?

any advice?

 

I would still put it on. My problem was that i was always running aggressive boost (23 peak tapering to 20ish by redline) and i have an HKS intake. My maf scaling table is not calibrated for this set-up yet and because of it, i am hitting way too high of load cells for not having done any tuning.

If you put your TBE on you will notice quicker spool and better throttle response, heck, even i did. Its just you should leave you boost around 20-21psi until you can tune for the set-up.

When you put it on, just monitor knock and compare the timing between before and after pulls so you'll know where to focus your attention on. My issue is right at spool up, its too fast and too much.

This is most likely due to bypassing the stock boost solenoid circuit (causing quicker spool) and running too much boost.

This exhaust WILL make ALOT of power, but i will have to fix a few issues first. Id say you should still put it on for the quicker spool.

 

Thank you! I dont have a MBC (yet..) so I think I will avoid that problem...

I actually heard that the intake can cause a lot of issues without the retune..

I'm going to be running an 02 fouler on my TBE so I don't think my ECU will even know that I replaced the exhaust..

 

The only time that I lost power because of an exhaust part I had added was due to my downpipe coming into contact with my crossbars causing phantom knock which caused the ecm to pull timing. The pipe had clearance at rest, but I did not take into account motor flex at WOT. It is worth a shot to remove the two crossbars and log a run to see what happens before you start adding fuel. Good luck.

 

which two crossbars are you talking about?

 

The two bars directly below the downpipe.

 

Thank you for the tip. I used the big spacers that came with my TBE so that they cleared the DP. There is pretty much no play in the system due to the hardware that came with the TBE. But I could see how this would lead to a problem, as phantom knock would kill power

I am recieving my LC-1 hopefully next wednesday and i will post up some finished number and logs.

 

do you think the possible loss of power may be more becaue of the intake than the exhaust?

i think i read somewhere else that the stock IX ecu pulls timing if it senses too much air coming past the MAF