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Gtir Motorsport club » Tech room » Help and Advice » 5zigen

5zigen

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15zigen  Empty 5zigen on 8th December 2015, 7:19 pm

Stu

Stu
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I have started to think about getting this exhaust welded...
I have lay it down on the ground under the car and the system goes from the tail box. To the decat pipe. Then it has another section of pipe which is 3/4 of a downpipe.
I have a few questions.
Heres the first.
Should I have the 1/4 that is missing off the down pipe. (The elbow part upto the turbo.) Should I have that made up to match the 3" pipe that I already have..? Or just fit the mongoose downpipe.
Second question is this.
The 3 inch pipe goes into the middle silencer and then comes out to 2 1/4 inch pipe that goes all the way to the rear box.
Do I keep it like that or will it cause problems?
Or do o get that section re made out of 3 inch pipe..?
If I use my goose down pipe it will be 2 and 3/4 inch pipe to 3 inch to 2 and 1/4.
Or I could have the elbow made in 3 inch and have 3 inch to the 2 and 14 inch pipe.

Hope I haven't confused anyone. My head is battered lol
Heres some pics to show what I have.
Ignore the stainless pipes.
5zigen  20151030_143314_zpspcwzdqzu-2_zpstnvdxqwi
This is a poor Photoshop of the pipes together.
5zigen  IMG_20151208_190049_zpssbkrwrmp
The green circled bit is the decat and the red circled is the downpipe that has the turbo end missing.
5zigen  20151208_190604_zpsaxgupchk


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25zigen  Empty Re: 5zigen on 8th December 2015, 8:49 pm

gtir_woody

gtir_woody
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I would just make up the remaining section up to the turbo, that way it's 3 inch rather than the mongoose pipe which is smaller. As for the second question, I guess the exhaust is only going to flow as good as the smallest section?

35zigen  Empty Re: 5zigen on 8th December 2015, 9:14 pm

Stu

Stu
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Admin
I will have to cut the pipe and add a flexible aswel I guess.
Think I will take my downpipe off and take it to an exhaust place for them to make it up the same.
Think it's best to take the middle section too so they can cut the smaller diameter pipe off and replace it with 3" so it's all running 3" pipe from turbo to back box.
Should be a decent exhaust then Smile


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45zigen  Empty Re: 5zigen on 8th December 2015, 9:21 pm

gtir_woody

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That's probably what I would do mate. Yeah you will need a Flexi up the front aswell. I took a downpipe to an exhaust place once to get it copied, do you think it was even close when I tried to fit it to the car? Lol

55zigen  Empty Re: 5zigen on 8th December 2015, 10:02 pm

Stu

Stu
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Lol hope I don't have the same problem then Laughing


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65zigen  Empty Re: 5zigen on 8th December 2015, 11:21 pm

gtir_woody

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You need to be on the look out for a cheap welder, you are good at finding bargains Laughing

75zigen  Empty Re: 5zigen on 8th December 2015, 11:40 pm

Stu

Stu
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I would need a pipe bender aswel tho and then a welding mask.
Wouldnt it be cheaper to let someone else do it lol


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85zigen  Empty Re: 5zigen on 8th December 2015, 11:55 pm

gtir_woody

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LOL very true mate, but then you would own welder to do other stuff Laughing

95zigen  Empty Re: 5zigen on 9th December 2015, 12:19 am

Stu

Stu
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I dont have patience to weld things lol


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105zigen  Empty Re: 5zigen on 9th December 2015, 12:23 am

nomad

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You can buy pipe benders for 140 even cheaper 2nd hand but you can do it with cuts instead of bending the pipe ....or get preformed elbows/angles quite cheap in stainless or mild steel ...


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115zigen  Empty Re: 5zigen on 9th December 2015, 12:33 am

gtir_woody

gtir_woody
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That's how a made all my intercooler piping, brought mandrel bends, cut them up and used a marker and tape to test fit everything, then got someone to tig them. Pretty cheap and easy.

125zigen  Empty Re: 5zigen on 9th December 2015, 11:11 am

shroom

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I would keep it as close to how it was designed as possible? Might change the note of the exhaust if you change sizing too much?


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135zigen  Empty Re: 5zigen on 9th December 2015, 11:20 am

Stu

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@shroom wrote:I would keep it as close to how it was designed as possible? Might change the note of the exhaust if you change sizing too much?
Its a miss match at the moment Tom. The rear box has been cut off and smaller pipe welded on and also with the middle section. Someone has really had a bad go at replacing old rotten pipe I think.
I will keep the original 3" from turbo to the middle silencer. But the under sized pipe that someone has welded on I will replace for 3" pipe.

The down pipe is about 20" to short so I will have a flexi welded in and the elbow that's missing I will have one welded on so I can bolt it to the turbo..

Should be as good as new when I have finished Smile


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145zigen  Empty Re: 5zigen on 9th December 2015, 11:23 am

Stu

Stu
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Unless it's designed like that?
My last one had the same sized pipe all along the exhaust.


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155zigen  Empty Re: 5zigen on 9th December 2015, 5:16 pm

shroom

shroom
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Yeah its designed to drop from 3" to 2" something as mine was the same as that, although as you said someone had a go at repairing it badly so it may be better to start again.


_________________
Now Shagging sheep on the cheap
You wont find one that's for keeps
Spend the money, find a honey

'Shit' think I need to sell my Sunny!

But woman cant replace a sheep
Oh I wish that for the peace!
But I really cant find my honey
The only one I would give my money
Is one with a great big fleece
And then I would be at peace...

165zigen  Empty Re: 5zigen on 9th December 2015, 5:20 pm

shroom

shroom
moderator
moderator
So looking back on my photobucket this is what it would have originally looked like, it would have been push fit instead of a flange and bolt if you have a look at this...

5zigen  P1020676

5zigen  P1020675


_________________
Now Shagging sheep on the cheap
You wont find one that's for keeps
Spend the money, find a honey

'Shit' think I need to sell my Sunny!

But woman cant replace a sheep
Oh I wish that for the peace!
But I really cant find my honey
The only one I would give my money
Is one with a great big fleece
And then I would be at peace...

175zigen  Empty Re: 5zigen on 9th December 2015, 5:21 pm

shroom

shroom
moderator
moderator
It just pushed on and had retaining springs on the sides, so it looks like they have welded that dodgy flange onto it to try and make it a better fit?


_________________
Now Shagging sheep on the cheap
You wont find one that's for keeps
Spend the money, find a honey

'Shit' think I need to sell my Sunny!

But woman cant replace a sheep
Oh I wish that for the peace!
But I really cant find my honey
The only one I would give my money
Is one with a great big fleece
And then I would be at peace...

185zigen  Empty Re: 5zigen on 9th December 2015, 5:45 pm

Stu

Stu
Admin
Admin
Ah okay. Thanks for those pics. I will just repair it then Smile


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