i got intake, exhaust and tune, @ 20 PSI made about 50 whp

 

Personally I think you have to look at all of the benefits of going to or staying with a TBE (or even a CBE). Like others have stated...there are too many variables involved in tunes, parts, and the exhaust builds themselves.

For me...the main driver behind putting on a TBE was not only power/response...but the weight savings. I know the OP is asking questions around power...but shedding weight is definitely a benefit.

Bottom line is that the less restrictive the exhaust, the better in terms of the engine's ability to be more efficient...that's just basic physics. But as far as measurable numbers go...there really is no definite answer.

 

If one claims up to 15 hp thats doesn't mean 15 peak whp. I'm sure you will see gains of 15+bhp in places throughout the powerband.

 

Ah, I noted how lack of sleep was keeping me from focusing.

IMO you will get the best results from a street tune or dyno tune. Not to say good tuners can't get close, just my observation as some of these cars just react differently to mods and tunes. As I wondered previously, maybe you weren't getting everything out of your 3" exhaust tune.

Also, if your boost is set higher now than when it was previously stock then you would be seeing better performance than when you first had your stock exhaust on. Regardless, I'm just guessing and I suppose what really matters is that it is quieter now for you and still feels good!

 

I didnt dyno my car stock, but I did dyno it w/ a only a TBE w/ a hfc no tune. I made 274 WHP on a dynojet and with the tune made 300whp if that help.

 

i dont know about dyno numbers, but when i was stock my best time in the 1/4 was 13.4 @ 104. Im a horrible "drag" racer, but whe i did TBE and tune i ran 12.8 @108, granted the boost went up a couple pounds and didnt taper like stock. Again, people can hit a 12.8 stock, but with me as the driver it was very noticable. And not only that i have the RRE STEALTH exhaust which is one of the most restrictive due to the 5 feet of resonators i have lol

 

Thanks for the input, everybody. Maybe my butt dyno is out of calibration.

But I'm happy with the way the car is performing with stock exhaust + WORKS flash, so I guess that's all that matters.

 

*As I understand it*, you can run higher boost, spool more quickly, get better mileage, get more ladies, solve world hunger, stop global genocide, and prevent killer whales from eating their trainers by running an aftermarket TBE. These benefits far outweigh the drone!


This was funny, booseup&riot Thanks for sharing your thoughts on the Cobb AP.

 

indeed.

you're the one that has to live with it, so youre definitely on the right track.

 

exhaust plays a huge part on power when you start running higher boost. the stock downpipe IS NOT the best downpipe for this car. it might be okay on stock boost levels, but run 30psi and tell me how good it feels against a 3" downpipe. i dont care what turbo your on, you will lose a good bit of power..

and who puts parts on these cars and doesnt get a tune? if you do, its not smart and should know your not gonna get the most power out of your stuff. its common sense. so how is that wrong for companies to use that when they are trying to sell a product. i hardly consider mail in flashes a tune too....

this thread is pretty pointless. if you wanna make power, your gonna need a 3" or bigger exhaust at some point. end of story

 

The exhaust is hottest at the turbo. Heat a gas and you get either more pressure or more volume. Since the exhaust gases are in a confined space you get back pressure, the enemy of turbo performance.

Without a converter in the system the exhaust quickly cools - the biggest gains are to be had at the front. So, you setup makes sense to me.

 

With a good 3" turbo-back exhaust and tune (with upping the boost obviously) you should be able to pick up 75-80whp.

 

I did some testing a while ago for the same reasons and on my setup (from memory) the TBE was worth maybe 15 whp (keeping a catalytic converter).... granted my test was flawed in that the base run was done in winter and the post TBE in summer...Both were done on the same dyno and netted the same numbers....The guess was the temperature delta may have shown a real 15 hp delta....

I really think it has more to do with how much hp you are pushing (other mods) than anything else. I am going to do some logs with a 3" TBE w/ 3" hiflo cat and then put the stock catback on and see how it compares. To me the noise / drone is not worth 10hp.

The question I'll have later is when running a bigger turbo will the data tell the same story ? My guess is that once you move to a Red + setup a 3" exhaust will show a bigger gain....

 

You're not going to get a big gain with an cat-back....but a turbo back should give you the noticeable gains (3").

 

Well the only difference is the DP and the catalytic converter...From what I have seen the big #s come from the test pipe part of the equation when folks say they gained hp from their TBE...

Like I said, I'll take some logs before and after so you can see where the gains come from....