Exhaust

[pork]

I wanna make a new exhaust system, never made one so would like some pointers, mainly on what size pipe to use with the turbo?

The exhaust I have now has a centre box then over axle pipe, then back box, can I jus use a single pipe, then onto back box of my choice?

Do different back boxes offer different things? Not to bothered about noise, rather it not stupidly loud though!

 

[frank]

the size is critical on a turbo neil, the pressure ratio between the exh mani (pre turbo) and post turbo system governs how much boost the compressor will give (and spoolup response too )
i tried my near stock system on the other week and got about 1/2 the power

 

[pork]

So how would I go about calculating the size pipe I need

 

[frank]

what size is the turbine exducer mate (hotside exit size)

 

[pork]

From what I can gather from info, (haven't received t yet!) 3 inch

 

[frank]

yours is the 15T aint it neil (the smaller TD04 with the round exh port) ? so a 56mm exducer ?
if so, the system needs to be bigger than 56mm ideally
edit 45.6mm

 

[pork]

yours is the 15T aint it neil (the smaller TD04 with the round exh port) ? so a 56mm exducer ?
if so, the system needs to be bigger than 56mm ideally
edit 45.6mm

Haha, maybe I've been looking at the o.d of the flange I'm wanting to make exhaust up.

So as long as its larger than the exducer, it'll be ok

 

[MicrAde]

Making a stainless system mate?

 

[frank]

aye, this bit, else you,re gonna get a bottleneck eh

 

[pork]

Making a stainless system mate?

Not yet, jus need to replace to sieve like exhaust I have now lol

 

[pork]

aye, this bit, else you,re gonna get a bottleneck eh

View attachment 21819

Cool,

What about back boxes/silencers? Any special requirements or personal preference?

 

[frank]

thats a pic of my TD05 ^ which is 50mm, so we,re building a s/s 60mm system for it atm neil
here,s the centre box (hopefully nice and quiet) straight through/perforated tube ones have a better flowrate eh

 

[pork]

thats a pic of my TD05 ^ which is 50mm, so we,re building a s/s 60mm system for it atm neil
here,s the centre box (hopefully nice and quiet) straight through/perforated tube ones have a better flowrate eh

View attachment 21820View attachment 21821

Very nice!

 

[karlj]

that looks cool Frank, what are you using as wadding?

 

[frank]

that looks cool Frank, what are you using as wadding?

e glass karl http://www.ebay.co.uk/itm/Exhaust-C...arts_Vehicles_CarParts_SM&hash=item3360a93f28 twas £3 + vat iirc

 

[karlj]

ahh ok it looked like a big bag of cotton wool in your pic

 

[pork]

I don't ant a mega loud exhaust, so would I need to make something like this, or is there off the shelf components I can weld together?

 

[karlj]

cherry bomb do a mid silencer similar to Franks but I don't know how quiet it is

 

[pork]

cherry bomb do a mid silencer similar to Franks but I don't know how quiet it is

Il take a look ,

 

[pork]

So, before I go any further, the diameter on the turbo exhaust is 2 inch, I've made flange to match

Will this be ok, or should I go bigger?

 

[frank]

2" should suffice mate mandrel or swaged bends ?

 

[pork]

Mandrel bends I guess, cheap enough,

 

[frank]

the bends tend to be the slowest area, oversize them if poss eh

 

[pork]

You mean like large radius bends ?

 

[karlj]

You mean like large radius bends ?

Yeah a larger diameter

 

[speediedoy18]

Pork u should get the fast car mag this month got a lot of turbo info for u


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[speediedoy18]

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