X pipe on a twin turbo setup? yes or no
#1
X pipe on a twin turbo setup? yes or no
Right now I have two downpipes, exiting somewhere near where a stock manifold would exit(or attach to a factory cats/h pipe). The guy I am having make my charge pipes, is going to make me an exhaust system, 3". I was planing on him making me an X pipe,...then back into there own tailpipes.
My question is,...is the X pipe a good idea for a twin turbo setup? I don't personally see why it would make a difference but, someone has just planted it into my head that it would.
Insight?
My question is,...is the X pipe a good idea for a twin turbo setup? I don't personally see why it would make a difference but, someone has just planted it into my head that it would.
Insight?
#4
11 Second Club
iTrader: (74)
Do you already have one or are you going to buy one? I don't think its worth rushing out and buying one. But, I would think yes it could help. Scientifically, the main benefit of the x-pipe is to create a suction effect from the opposing banks firing...creating a scavenging effect to increase the exhaust gas velocity. BUT with a turbo in the middle of the exhaust pulses, that gets kinda thrown off I would think. I bet it wouldn't hurt though. Just make sure you run a adequate one, like a 3". Bigger the better to get that backpressure gone. It'll help quiet it a db or 2 maybe also.
#6
K.
I was running a 3" offroad X with my blower setup...which I have sold. I would have to have one custom made,...with my new exhaust. I was thinking it would help with velocity but...wasn't sure if it would effect or hinder setup. I'm not going to run mufflers soo,...the x might be the option.
Would love to hear more input on this if anyone has more.
Thanks for the replies.
I was running a 3" offroad X with my blower setup...which I have sold. I would have to have one custom made,...with my new exhaust. I was thinking it would help with velocity but...wasn't sure if it would effect or hinder setup. I'm not going to run mufflers soo,...the x might be the option.
Would love to hear more input on this if anyone has more.
Thanks for the replies.
#7
do not go with an x pipe if you are doing a rear setup. even if the turbo is before the x it will not scavenge, since the flow of air is no longer pulsing. It will hurt your top end big time.
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#9
Have you tested it with and without an x? or are we just biased towards our setup like everyone else?
If you are smashing two exhaust flows into eachother, it isnt scavenging, then you are hurting airflow. Seems like simple physics to me?
If you are smashing two exhaust flows into eachother, it isnt scavenging, then you are hurting airflow. Seems like simple physics to me?
#10
I have a front/top mount turbo setup.
Thanks for the replies guys.... although I don't think anybody has the "correct" response here.
I'll do the X. I'll even have some pipes made up and i'll test the "theory" myself. Even though I believe the X will help with velocity/exit.
peace
Thanks for the replies guys.... although I don't think anybody has the "correct" response here.
I'll do the X. I'll even have some pipes made up and i'll test the "theory" myself. Even though I believe the X will help with velocity/exit.
peace
#13
9 Second Club
I tried a balance pipe on my old RV8TT. Cant comment on performance, as dont really think it made any difference, but it certainly quietened things down a bit. Much smoother sound too. ( previously totally seperate pipes )
The idea of the gases colliding may be valid. But only one cylinder fires at a time, so in theory only one set of gases is exiting.... go from a 3" single pipe, into an open X with 2 x 3" outlets.....
Well, that should flow better than sticking to a single 3". I assume thats part of the theory.
Id love to know more myself though, as I currently have a DIY X-pipe on my setup, and would like to know how different styles perform, or indeed if no X-pipe might be better.
I made mine fully open using 2 90deg bends cut and welded together. The only other one Ive seen is a DiFillipo for a friends Monaro, and it had 2 x 90's back to back, but with only a single 1" diameter home linking the X together. So it was more like to full 3" bends, with a small link between them.
The idea of the gases colliding may be valid. But only one cylinder fires at a time, so in theory only one set of gases is exiting.... go from a 3" single pipe, into an open X with 2 x 3" outlets.....
Well, that should flow better than sticking to a single 3". I assume thats part of the theory.
Id love to know more myself though, as I currently have a DIY X-pipe on my setup, and would like to know how different styles perform, or indeed if no X-pipe might be better.
I made mine fully open using 2 90deg bends cut and welded together. The only other one Ive seen is a DiFillipo for a friends Monaro, and it had 2 x 90's back to back, but with only a single 1" diameter home linking the X together. So it was more like to full 3" bends, with a small link between them.
#14
11 Second Club
iTrader: (2)
No x-pipe. Yeah the x-pipe helps balance and increase scavange, but only on a NA setup. Think about it, if in order to make boost you have to build exhaust pressure, then the exhaust is coming out of the turbo under pressure and you want as little restriction as possible. An x_pipe will be more of a restriction more than anything else unless you want it to quiet it down a little. IMO
#18
TECH Senior Member
iTrader: (39)
I see some people use a hooker y pipe to connect to the catback. On APS's dynosheet they use dual 3 inch pipes. Does a turbo quieten down the exhaust compared to a N/A setup? Would there be any difference between the single exhaust setup and dual 3inch?
Thank you.
Thank you.