Turbo exhaust

[chaseamundo]

I'm hooking up my Kit on my Si and wondering what the ideal exhaust size would be? its a 18g greddy turbo for now but plan on upgrading it later on down the road... so 3"? 2.5"?
And im probably doing straight pipe. any problems with that?

[cm7k24]

i'll give you my 2 1/2 and you give me your exhaust,

i'll do all the work. ill even throw in a test pipe :)

[DustnU]

Go with 3" bro especially if you plan to upgrade later, don't waste time or money. Thermal is allways GREAT!!!!!!!!!! HKS is as well if you can find it.

[chaseamundo]

Itll be just a straight pipe man.
What you mean by thermal?

Jamal- i already got 2.5 lol

[1SOL2NV]

i run 2.5 and im only running 8 pounds tho .. but if you plan on going past 10 .. i would do 3.

[SilverSurfer]

i would go 3"

thermal the exhaust is what he meant

[chaseamundo]

ok then whats thermal the exhaust mean hah

[NoWAyItZTOMmY]

thermal, exhaust brand, you know like hks apexi

[NoWAyItZTOMmY]

http://www.thermalrd.com/honda.htm

[chaseamundo]

ahhhh never heard of them. thats nuts

[chaseamundo]

cant i just take it to a shop and have a custom straight pipe made?
emissions isnt an issue

[SilverSurfer]

yea

[chaseamundo]

i guess thats not a popular thing to do lol

[wwli]

Your better off in getting a full exhaust system from companies like Thermal Research because the quality of it you cannot get at a local shop.
I got mine done at MS and they fucked it up. Told them how I wanted it and they did not do what I had requested then they were like well you should have told him in advance, in part I did and got screwed on the labor. A simple exhaust job turned into a complicated one so stay away from these people....my 0.02.

[chaseamundo]

ok can do.

[j0nbunklah0m]

i got a freind that works at a muffler shop that can do it. he does good jobs too.

[88NaCivic]

3 " no other way!

[crashtke]

3" for the downpipe back. Even 4" would not be a bad idea for the down pipe, especially if it is a internally gated 18g. Try to get one that is mandrel bends if you can. 3" downpipe back will support a LOT of flow.

[chaseamundo]

ok, yea my down pipe is Ginormous! lol
and ill stick with 3" for sure

[JJSPEC Racing]

I am using 2.5" custom mandrel bent aluminum exhaust. The downpipe is mild steel. Made 450 whp @21 psi and am running 24 psi and low elevens(look at signature). The whole exhaust weighs 7 lbs. It is on a d series. What size is your turbo outlet? Making everything work together is key to making good power. Here is a pic before we added the muffler(which is a custom fabbed aluminum piece also):

http://www.maconracers.org/imagehost/pics/3ac243b07822da19870f7c6101a2ad8c.JPG

[cm7k24]

ok then whats thermal the exhaust mean hah
chase, its the same shit rashad has.

[chaseamundo]

JAMAL - thanks i realize that now haha

and im not sure of the outlet size. td04 18g turbo....??? not sure

[turbomirage]

How much psi are you planning on running? You can go with 3" if you would like, but it is not necessary. For your set-up, 2.5" would probably be more than enough for what air that 18G can flow. As stated before, 450whp was put down using a 2.5" exhaust. 4" is ridiculous for an 18G turbo, do not do that. The pain of making it and the $$$ spent doing it will be a waste, when you can make the same power from a 2.5" exhaust. Again though it is up to you... but I believe 3" is not needed and 2.5" would be a better choice for overall performance for your 18G and engine.

[turbomirage]

I am using 2.5" custom mandrel bent aluminum exhaust. The downpipe is mild steel. Made 450 whp @21 psi and am running 24 psi and low elevens(look at signature). The whole exhaust weighs 7 lbs. It is on a d series. What size is your turbo outlet? Making everything work together is key to making good power. Here is a pic before we added the muffler(which is a custom fabbed aluminum piece also):



What size turbo are you running?

[chaseamundo]

How much psi are you planning on running? You can go with 3" if you would like, but it is not necessary. For your set-up, 2.5" would probably be more than enough for what air that 18G can flow. As stated before, 450whp was put down using a 2.5" exhaust. 4" is ridiculous for an 18G turbo, do not do that. The pain of making it and the $$$ spent doing it will be a waste, when you can make the same power from a 2.5" exhaust. Again though it is up to you... but I believe 3" is not needed and 2.5" would be a better choice for overall performance for your 18G and engine.

oh ok thats good to know.... but keep in mind ill be wanting to upgrade turbos later on down the road...(are you ricky?)

[cm7k24]

yeah thats him

[turbomirage]

Yes, that is me. :goodjob: But yes, if you are planning on upgrading down the road then 3" would be fine.

[cm7k24]

ricky when are you gonna come check out my civic! lol

[chaseamundo]

oh alright, my buddy jamal (im sure you know him) told me about yuou and your car. sounds sick. been waiting to see this thing in person haha

but ok 3" it is