How much gain for test pipe?

[18tboost]

Eurocode says that it has a solid gain of 15hp, is it really? I have a custom downpipe, custom exhaust manifold, borla catback after adding the testpipe will it be loud?

[pizdetsauduxa]

if u have software its worth it.
speaking of which, anyone wana buy a 3" eurocode tp? :)

[Turn10]

I'll will be louder, you are cutting out the resonator I presume as well. You will gain higher boost round mid revs so like 3-5 x1000. Also with all of that there should be a solid gain of 15-25 hp.

[vc1492a]

if u have software its worth it.
speaking of which, anyone wana buy a 3" eurocode tp? :)

interested!

[Papachristou]

there is some arguement on if a test pipe actually helps or hurts. it really depends on your setup (stage 1/1+ or BT/BAT) the BT/BATs certainly get some solid gains from it. i couldnt feel any gain in power after going to a full neuspeed/test pipe. perhaps quicker spool, it wasnt like the difference i immediately noticed with the FMIC. Someone even did a dyno before/after and showed 0 hp increase.

i will point out it lowers your EGTs and allows the car to return to normal operating temp much quicker which keeps oil from cooking on your turbo. im very happy with mine though, it might help more at speed where its harder to feel the increase in power

[jessefrank]

Agreed 100%^^^^^

I did my TP before installing my full exhaust and the main difference I noticed were quicker spool (a few 100 RPMs sooner) and my turbo wouldn't be glowing like a cherry where previously after even slightly spirited driving it would be nice and red (lower EGT's).

It "felt" like it gave power under the curve, maybe not any gain in peak, but my car felt stronger in the lower mid range and didn't choke out quite as bad up top.

[ppcastel]

So if you have stage 1+ which is 235hp, with a test pipe you should have around 250? Ehh...Is that right?

[Papachristou]

Agreed 100%^^^^^

I did my TP before installing my full exhaust and the main difference I noticed were quicker spool (a few 100 RPMs sooner) and my turbo wouldn't be glowing like a cherry where previously after even slightly spirited driving it would be nice and red (lower EGT's).

It "felt" like it gave power under the curve, maybe not any gain in peak, but my car felt stronger in the lower mid range and didn't choke out quite as bad up top.

thats what i was trying to say! definitely more power under the curve when you are rolling..

yeah, with stock programming,exhaust and cat my turbo,mani and cat would glow cherry red now i have 1+ running 2.5x the boost with the neuspeed and a test pipe and i can barely get it all red...

[Papachristou]

So if you have stage 1+ which is 235hp, with a test pipe you should have around 250? Ehh...Is that right?

probably not.. maybe 5-10 more

[festerfm]

doesnt the tp do more for tq?? and not peak tq, but off peak tq?? thats where the quicker spool comes into play right??

[vc1492a]

so a test pipe's a good idea even if you're on stock programming? Im seriously thinking about it

[a4husslin]

I love mine. Gives the car a more aggressive note too. Just do the whole exhaust system at once.

[Papachristou]

so a test pipe's a good idea even if you're on stock programming? Im seriously thinking about it

even on stock software, its still going to lower your EGTs and let your turbo cool down much quicker which is better for your oil. I just crack my door now and let it idle till the ding stops (about 1 minute) i vagged it and as long as i drive easy the last few miles its down to 400-425 egts within that one minute

[KPC1.8TQuat]

Papa, do you get a CEL with your TP? I know you and I have been talking in TP posts all week, and the more I think of it, I am now leaning towards getting one.

[kwimberly]

You'll get a CEL without some kind of software file or antifoulers.

[davidlizard]

I dont think a TP gives any HP. IMO it gives a quicker spool, 300-400rpm sooner, It gives a good kick in pants feeling... It's an important part in the plenty of part that help our car but has not the 15hp claimed by ER. HP are much more difficult to gain but I would say that it probably a good 10 hp on the butt dyno!!! It's significant in the lower rpm's...

that's my 2 cent

[festerfm]

the tp wont give you a higher peak hp or tq, but say at 2800rpm (and i have never seen a dyno so p-p-pplease dont flame my example) but say at 2800rpm you had 200hp and 250tq.. your max hp and tq are 265hp and 330 tq. w/ a test pipe, your max numbers wont change but u'r hp and tq at 2800 will go up since you are seeing higher boost at that rpm.. am i right???

[davidlizard]

I think those numbers are absolutly nothings but you could say something like that... Your peak HP and tq will not change but the curve in the lower rps will increase...

[festerfm]

that's a better and easier way to say it... u just see the power sooner..

[traf818]

There are dynos out there that show test pipe gains. And for the money it's well worth it.

[KPC1.8TQuat]

There are dynos out there that show test pipe gains. And for the money it's well worth it.

Someone find examples. My guess is that a TP will marginally increase peak HP and torque, but will have a significant positive effect on the area under the curve.

This is of course aside from the proven fact that a TP will decrease your EGT's which is beneficial to the entire health of the motor.

Someone post dyno examples.

[a4wd]

You guys all have valid points. I ran Revo Stage 1 with cat back maganflow exhaust for about 2 years before I installed a testpipe. Once I did, I felt it totally changed the characteristic of the car as far as power under the curve. The stock CAT chokes the engine so bad, and my measly 2.5" testpipe made the car flow better.

I always hear people talk about how they prefer a HFC because of legal issues. However, the way I see it, the cop can still write you a ticket because most HFC are not CARB legal anyhow. Plus the cost of the HFC will be equivalent to the TP+ticket+unistall+install back again LOL. I mean I got my my jeff pipe for about $100 and paid $100 for the install. Not bad IMHO...I am sooo glad i paid for that !! I would have been so pissed off because the shop had to make modifications to fit my downpipe...

[Killerteve]

So if you have stage 1+ which is 235hp, with a test pipe you should have around 250? Ehh...Is that right?

You can never really go by those tuner claims. Plus with whp so different than chp you just have to take it for what it is based on your mods. I felt gains on the butt dyno with Revo 1+ but for the minimal cost it's worth it just for the sound(even with stock exhaust) assuming you don't have strict emission regs to deal with. And for the record, in NV I rolled up to get smogged like nothing was wrong with my TP installed, and they did a simple ODB2 scan and I passed with flying colors. Of course you must remember that I have the REVO file for no CEL and if you have a cel for whatever reason you automatically fail (though u do get a discount on the retest).

[eurogruppe]

ECS threw in the test pipe programming along with my APR 1+ tune so that i wouldnt get a CEL once i put a full turbo back on.

[ppcastel]

^^^ eurogruppe, how much louder was your car when you added the tp to that decorsa exhaust?