running straight pipes
#3
We got this...
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straight pipe.
But to answer your question, no you don't need back pressure with a turbo. Your boost levels are going to go up. And the value of everyone elses car will go down. Be careful.
But to answer your question, no you don't need back pressure with a turbo. Your boost levels are going to go up. And the value of everyone elses car will go down. Be careful.
#5
with a turbo the less back pressure the better back pressure will only limit your turbo and possibly cause future damage the only problem with strait pipes is that they are incredibly loud on rotaries and the sound disgusting
#7
1308cc pure madness
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well yes loudness is an issue...im currently running straight pipe on my t2...but am now cruising around with my silencer in....careful on straight piping it tho....you will have overboosting problems and run into fuel cut..make sure u get a boost controller and a fuel cut defensor if u plan on running like that....also...wen u up the boost...pay careful attention in upgrading ur fuel system...
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#9
Lives on the Forum
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First of all, boost controllers CAN NOT turn down boost nor will they prevent boost creep. If you run a wide open exhaust on a turbo, your boost will raise up. You need to get an FCD, port the wastegate, and get a fuel controller to add more fuel. Otherwise you will blow your motor.
#10
Camshaft
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well yes loudness is an issue...im currently running straight pipe on my t2...but am now cruising around with my silencer in....careful on straight piping it tho....you will have overboosting problems and run into fuel cut..make sure u get a boost controller and a fuel cut defensor if u plan on running like that....also...wen u up the boost...pay careful attention in upgrading ur fuel system...
First of all, boost controllers CAN NOT turn down boost nor will they prevent boost creep. If you run a wide open exhaust on a turbo, your boost will raise up. You need to get an FCD, port the wastegate, and get a fuel controller to add more fuel. Otherwise you will blow your motor.
#11
I wanna go fast
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edit: oh wait you said increased BURNING, AKA consumption, meaning you would be correct sir. you threw me off, when you said weary of raising fuel... i should have read it completely.
#13
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First of all, boost controllers CAN NOT turn down boost nor will they prevent boost creep. If you run a wide open exhaust on a turbo, your boost will raise up. You need to get an FCD, port the wastegate, and get a fuel controller to add more fuel. Otherwise you will blow your motor.
dkwasher.....heres my setup to use as a reference....since i went straight pipe i had to definitely upgrade my fuel system to prevent leaning out
fcd
agency power mbc
apexi afc neo (dyno tuned)
walbro 255lph fuel pump
rc engineering 550cc primaries
greddy/denso 720cc secondaries
just the fuel setup alone cost me around $900....not including dyno tuning (which was free for me from a friend)....just some things to think about if you go that route...
#14
Camshaft
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I personally would rather drop a lot of money SOONER on a nice Programmable EMS than have to pay a lot MORE money LATER on a new car/motor/body part.
And you CAN add more fuel and not have a FCD, the basis of a Fuel Cutoff is RPM's, not actual volume of fuel.
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if u really want a loud exhaust get the corksport 3in exhuast all the way back with 3in down pipe (any brand) and that exhuast is too loud adds power but too loud.. but if you don't mind go for it. i have one if you want to buy it.... i took it off cuz unbarebly loud.
#19
1308cc pure madness
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hate to say it...but...told u so.....
#20
well its been day 2, I havent got pulled over yet lol.. I am turning deaf though. At least I look cool! haha yeah I need to upgrade the fuel system.. When it hits 10 pounds of boost, and shift up from 3rd to 4th it bogs, Its not enough fuel.. so I will try to upgrade teh fuel system..
This is gunna be badass, when I enter the next drift event muahhahaha
This is gunna be badass, when I enter the next drift event muahhahaha
#21
version 2.0
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It has been my experience that about a quarter of the people that run a Fuel Cut Defender end up revving their motor WAYYYYY too high and blowing all to high heaven.
I personally would rather drop a lot of money SOONER on a nice Programmable EMS than have to pay a lot MORE money LATER on a new car/motor/body part.
And you CAN add more fuel and not have a FCD, the basis of a Fuel Cutoff is RPM's, not actual volume of fuel.
I personally would rather drop a lot of money SOONER on a nice Programmable EMS than have to pay a lot MORE money LATER on a new car/motor/body part.
And you CAN add more fuel and not have a FCD, the basis of a Fuel Cutoff is RPM's, not actual volume of fuel.
while a lot of us would love to put down money for a nice haltech, or wolf, or microtech, but the vast majority of us broke FC owners would sooner just by a S-AFC, an FCD, and a boost controller and be perfectly happy until we decide to go big.
#23
mine is the na.... and I went single straight 2.25 from the down pipe back to a 3in universal tip. it sounds great! it gets loud at high rpms of course... but you most likely went full 3 inch right?
#24
Engine, Not Motor
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There is no reason to have a loud exhaust on a turbo car. A properly designed exhaust will be very tolerable and far from "loud". For example the RB "Rev" system is only a bit louder then stock at light loads and will support 400+ RWHP.
Boost controllers cannot lower boost past what the wastegate will naturally achieve.
Uh, you mean "BOV" and not "wastegate". Venting the BOV to the atmosphere should not effect boost response if done correctly and the valve is not too loose.
Venting the wastegate to the atmosphere will actually make it easier for most people to control boost, since most people don't seem to know how to properly tie a wastegate dump into a downpipe without it becoming a restriction.
They can't keep the boost low if the wastegate is too small. Which if we are talking about an S4, it certainly is.
well yes loudness is an issue...im currently running straight pipe on my t2...but am now cruising around with my silencer in....careful on straight piping it tho....you will have overboosting problems and run into fuel cut..make sure u get a boost controller and a fuel cut defensor if u plan on running like that....also...wen u up the boost...pay careful attention in upgrading ur fuel system...
How is this supposed to help with his question? An atmospheric wastegate will cause you to loose more boost between shifts than a recirculated one, So I personally would stick with the recirculated setup. But I've never heard of an atmospheric wastegate taking the place of a Straight Pipe exhaust...
Venting the wastegate to the atmosphere will actually make it easier for most people to control boost, since most people don't seem to know how to properly tie a wastegate dump into a downpipe without it becoming a restriction.
They can't "Turn Down" boost but they can cut it off. If you don't have one already, you'll probably need a boost controller if you don't want your turbo to explode lol...