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open downpipe or not.

 
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Old 05-19-2010, 11:33 PM
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open downpipe or not.

idk what to do,after i put on my turbo setup ima have my car towed to the dyno shop. and i dont have a downpipe. so what should i do?? should i have the tow truck take me to the muffler shop first or have the dyno tune my car first then take it to the dyno?..will it effect my tune?
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Old 05-20-2010, 12:33 AM
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Re: open downpipe or not.

Of course you should get the downpipe first.
I think it can be dangerous running the engine without one and I really doubt any tuner or dyno shop will agreed to tune your car without one. It just doesn't make sense.

I don't mean to be rude but you asking this question makes me wonder if you really know what your doing installing a turbo to your car.
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Old 05-20-2010, 12:43 AM
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Re: open downpipe or not.

i thought exactly what u said, i was firm with that thought until i read another forum where people was saying how they love driving with open downpipes and how it spools up faster and all this B.S. lol now they made me look dumb..
i just have one more question..im running a 14b on a stock f22a1 and i was wondering running 10 pounds but i heard you can only do that and it lasts only with a good tune,and im getting a good dyno tune and after he is gonna retune it again with a street tune with wideband. i dont know how many miles is on the motor i have now but i swapped it in 3 months ago.
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Old 05-20-2010, 01:04 AM
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Re: open downpipe or not.

Ok, about the downpipe, yes the turbo will spool faster without it because there will be less restriction but I wouldn't recommend it for street use.

Also no downpipe and open downpipe to me sounds like to different things. For me no downpipe will be exactly that, the exhaust gas coming out from the turbo and nothing else. Open downpipe to me is just the downpipe without the rest of the exhaust system (catalitic, pipe, muffler). From what I heard running open downpipe is very loud.

About the turbo and the pounds I really don't know. I know it depends on the turbo since different turbos will push different amounts of air.

I'll try to contact twokexlv6coupe (he will probably join the threat sooner or later). He has a turbo F22 and if I remember correctly he was running 10lbs (or close to it) but I think hes using a different turbo. Anyway I think he will be able to help you with that a lot more that I do since I really don't know much about this.
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Old 05-20-2010, 01:15 AM
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Re: open downpipe or not.

thanks, and thank you for the info. i was confusing open downpipe with no downpipe..my badd lol
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Old 05-20-2010, 01:21 AM
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Re: open downpipe or not.

i would hate to get pulled over for no down pipe.. do the right thing dude. an just buy one or custom make one out of 3in or something
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Old 05-20-2010, 01:30 AM
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Re: open downpipe or not.

do i need a flange? because i dnt see where i can get the downpipe all i see is flanges on ebay
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Old 05-20-2010, 02:00 AM
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Re: open downpipe or not.

wait, you can run an open downpipe and nothing will hurt your car?

i'm thinking about running an open downpipe >.> i do like the sound and being obnoxious :3
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Old 05-20-2010, 02:20 AM
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Re: open downpipe or not.

actually i think i have a down pipe on my turbo already all i need is a lil extra piping which and muffler shop will have no problem doing, im too lazy tho so im gonna check in the morning,
as sooon as i seen this yawning smiley i yawned lol..
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Old 05-20-2010, 11:00 AM
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Re: open downpipe or not.

ok i noticed that i have the stock o2 housing on there but obviously no downpipe. i bbin searching on ebay and all the downpipes i see has no place for my o2 sensor to go accept for under the car. but the problem is that my car only come with one o2 sensor which is on the headers. so what am i supposed to do?

(i know it sounds like i dont know a lot about turbo's and stuff but trust me i do,its jus this dsm setup is confusing the **** out of me when it comes to the ppiping)


here is a linkn to the downpipe on ebay

http://cgi.ebay.com/ebaymotors/3-5-B...item3efe257eff

Last edited by Pr3lude_Nation; 05-20-2010 at 11:05 AM.
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Old 05-20-2010, 11:06 AM
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Re: open downpipe or not.

A muffler shop can weld in a thing on the downpipe for you to put the o2, But I would say relocate it to the exhaust pipe.
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Old 05-20-2010, 12:25 PM
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Re: open downpipe or not.

so you think i should buy that one on ebay?
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Old 05-20-2010, 01:42 PM
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Re: open downpipe or not.

NO downpipe and OPEN downpipe are two completely different things, as mentioned by myself (haha that sounds weird to say ). NO downpipe will have the exhaust gases coming outta the turbo directly into the engine bay.... no bueno. or since you have the o2 housing on the 14b, they'll be coming out right in front of the block. but since you already have the o2 housing, any exhaust shop should be able to fab a downpipe to connect to your exhaust for like ~$100.


i was running open downpipe for about ~6 months, getting pulled over about 4-5 times/week, but it does sound absolutely badass, spool-up is crazy fast, and makes the "most" amount of power due to minimal back-pressure.

you def NEED a downpipe before you drive the car anywhere , especially to get it tuned, or else you run the risk of over-spinning the turbo. but you can def get the car tuned with open downpipe since most tuners are used to tuning 400+hp cars, about 1/2 having open DP.


also that DP that you posted will not work, since its for a t3/t4, and you have a 14b. there are basically NO aftermarket/bolt-on downpipes available for our preludes, mostly all of them hafta be custom made.
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Old 05-20-2010, 01:47 PM
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Re: open downpipe or not.

am i going to need to order and flanges? or the muffler shop will handle all of tht?? i dnt mean to sound like such a noob lol
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Old 05-20-2010, 01:49 PM
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Re: open downpipe or not.

its all good. any decent muffler shop SHOULD have that flange in stock.
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Old 05-20-2010, 01:55 PM
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Re: open downpipe or not.

thanks
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Old 05-20-2010, 03:31 PM
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Re: open downpipe or not.

i just swapped a f22b1 into a 91 accord and had the same problem with the o2 sensor all i did was take the wires out of the harness and relocate it where it needed to be it's not that big of a deal and def get a down pipe made for it. The o2 housing on the turbo has a place for a sensor but i would recommend putting a wideband a/f sensor in there. sounds like your already almost set with it, i have helped my friends do there turbo set up and it always get's delayed by the exhaust.
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Old 05-20-2010, 04:51 PM
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Re: open downpipe or not.

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Old 05-20-2010, 06:26 PM
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Re: open downpipe or not.

if any thing when you have the muffler shop make your down pipe have them weld in a bong for an o2 sensor and get a bolt to screw in and basically cork the bong. Some tuners have a wide band that they can the screw in that place for tuneing purposes then just reinstall plug after tuning. when you get the money for a wide band yourself you already have a location ready for in saveing another trip to the muffler shop. me and my buddies went in together and bought a wide band o2 setup and swapped it between our cars for tuning that way. and my opinion is open down pipe has a sick throaty sound that i like and you can really hear the turbo spool ,but if this is going top be a everyday driver you will definatlly want to consider just spending the money and getting the shop to weld you up a full 3in turbo back exhaust and throwing a straight through muffler on it at least.
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Old 05-21-2010, 01:38 AM
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Re: open downpipe or not.

im going to run an open down pipe
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