KAT downpipe

[silviamaniac]

Hi there, i hav a question on downpipe for ka24det

I hav a Revhard manifold and a t3/04e, now i m thinking of getting a downpipe. I stay in a place that muffler man here is so dump they do not know how to make a downpipe for you. No mandrel bend no ****. Thus i am asking for ideas and help.

Option 1.I might be getting a downpipe from realnissan.com since they use a revhard manifold for their 240sx turbo kit. BUt they only hav 2.5" downpipe for t3 or t3/04. They are unable to make a 3" DP for t3 because the t3 turbo outlet is not wide enuff for a 3". Custom job can be done by making a flare part on the top part of the DP from 2.75 to 3" but the job cost 175 and still need muffler man to adjust the length and weld the flange to fit. Costy..

Option 2.Get a sr20det downpipe. I might be getting a 3" downpipe for sr20det. My idea is, align the downpipe with the turbo outlet (since the sr20det manifold is not runner style and is bottom mount), then custom a straight pipe with 02 bung that conects between the turbo outlet and the downpipe inlet.. But i assume by aligning the downpipe to the center of the manifold, i will run short on the DP when connecting to the stock cat. Since i hav a 3" catco on hand, i will be changing the cat at the same time, so custom the cat to get the length i want because catco reserve some extra length on inlet and outlet for their universal cat. OBX 3" downpipe is 25 bucks starting on ebay, i hope no one bids on them. :p

Pls let me know if there is better idea on this.

[andrave]

sr20 downpipe wouldn't work at all... completely different than what you would need.

I can tell you that much. As far as getting it built, find some hot rodders in your area, they will be able to point you towards a competent shop. Might have to get your car towed there, but quality work has its price.

[WDRacing]

Buy a cheap ARC welder, buy some piping, make your own. Learning to weld is so easy, muffler pipe is perfect for practicing. Pretty soon you'll be building custom naifolds. Thats the best advice I can give.

WD

[fritts]

The SR downpipe is really what i think of a mid pipe. If you use the SR downpipe you will still need something similar to the realnissan DP to get you to the SR DP, I believe they cut is about 2 inches short from what realnissan told me so you will still have to have some custom work done. If you use the Realnissan dp by itself you will have to use the stock piping on back. I plan on running an SR 3 inch dp and then custom making my 3 inch downpipe to the SR Pipe. Just a 90 and a 30 deg angle. Go get a welder the experience alone will be worth it to do it custom. You can then also run your own IC and intake piping and save money there.

[silviamaniac]

Yes Sr downpipe will not work for sure without custom job.

I idea is basically -connect the DP outlet to cat...-then make an extension from turbo to downpipes inlet since they run short-then i get a 2 piece setup. From turbo to downpipe, from downpipe to cat.

Is this gonna work?

As i search thru the net, welder isnt "cheap" at all. Can you suggest me any welder which is cheap and capable to get the job done?

Are those 100amp 120 volt gonna work?

[andrave]

why would you use the SR downpipe at all if you are making your own extension?that seems completely silly.

[C-Kwik]

You won't need 3" piping. All you effectively need is for the pipe to be as big as the turbine outlet. Slightly bigger is a little better, but no need to burden yourself with such a minor detail.

[silviamaniac]

why would you use the SR downpipe at all if you are making your own extension?that seems completely silly.

As mentioned, no one able to custom downpipe nor mandrel bend here.A cheap downpipe on ebay "Save" my time, making an extension is way easier than mandrel bent. An extension is straight, a downpipe is bend.

Using Sr downpipe another reason, i can use a 3" DP and make a 2.5" to 3" flare extension.

[andrave]

um.. what?the piece that would connect to the SR downpipe would actually be a bend, since on the SR bottom mount manifold the stock piece is actually called an "elbow" since its a 90 degree bend....

and if your manifold is top mount then you are gonna have TWO 90 degree bends to connect to that downpipe...

so what do you mean that the extension you are making to bolt up to the downpipe is "straight?"

[silviamaniac]

my turbo has an elbow that face DOWN with 3 bolts pattern to connect to the DP.

Given a DP that loo like this, which the inlet face up. I just need a short extension to connect both of them.

[fritts]

I would run 3 in all the way back with a 2.5 to 3 in coupler from the turbo. The bends you use will cause backpressure so your effectively making your 2.5 in piping smaller. 3 in will help alleviate the bends. To me an SR pipe is an easy to find piece that means I have less custom work to mess with plus it adds an exhaust flange in an appropriate place for tear downs.

[silviamaniac]

I would run 3 in all the way back with a 2.5 to 3 in coupler from the turbo. The bends you use will cause backpressure so your effectively making your 2.5 in piping smaller. 3 in will help alleviate the bends. To me an SR pipe is an easy to find piece that means I have less custom work to mess with plus it adds an exhaust flange in an appropriate place for tear downs.

BTW, did u use a realnissan downpipe? and found that its short? Tell me the story maybe?

[andrave]

your turbo has an elbow on it already?what turbo are you using?

[silviamaniac]

t3/04e 50 trim .60comp, .63 turbine, elbow is always "accessory" but my builder give me one just to make things easy.

[andrave]

internal/external gate?

[fritts]

I looked at realnissans downpipe and asked them some questions about it that's how I found out that you would still need some work to get it back to the stock exaust's location.

[silviamaniac]

Internal wastegate

Yeah they did tell me that too... Its 175USD!

I can get a good welder with that price which i can use to weld the intercooler piping too.