what size intercooler piping

what size are people using for there intercooler piping 2.5 inch or 3 inch? agu into mk1

i know that turbo outlet is 2inch so im thinking a elbow reducer will be needed. and throttle body is 2.5 inch

im thinking 2.5 and using a


60mm > 51mm Silicone 90 or 40 Degree Reducer for turbo

 

2.25 should be fine. Unless you are going big power.

 

ok thanks will go for 2.25

 

Look here.. I asked the same question a while back

 

got a question im getting a Forge Dump Valve is it best to put it from throlttle body to cooler on the cold side on a agu driver side or the passagner side from turbo to cooler

 

There are two schools of thought with this. I put mine near throttle body . But others say put near turbo side to dump hot air.

 

majority of pitures ive seen with 20v have it on the cold side(throttle side). ive seen 1 person have it on the hot side . so i dont know is there any disvantage or advantagen on either side

 

Stock it's on the hot side. So, you gotta have seen more then 1
I've read somewhere that near the TB would be best as the air would be release quicker after shutting the TB closed. But that teory of releasing hot air, is also good, I guess.

 

Thats why I chose TB side so air is released quicker but not seen any tests that show benefits for either.

 

The only reason to have a DV close to the throttle body is to get a quicker discharge of charged air. I run mine on the cold side.

 

In your case 2- 2.25 in diameter piping.

You put it where you wish but my guidance would be based on what was read per Corky Bell and Alexandra G. Bell, where in my applications the BOV should be placed pre IC on the hot end as it reduces work on the IC, reduces air column build up to throttle valve and thus compressor surge.

 

You actually get a quick dischage of hot expanded air if you release near to the compressor diffuser. Think about it.

 

i already got 2.5 pipe work will this still be ok or should i return for 2 or 2.25

 

2.5" will take longer to "fill" so will slow response. It will take up more space in the bay so i'd return it. Silicone should be cheaper when its smaller also.

 

just re ordered 2 inch piping and i think i put dv on hotside

 

Good read above as i was thinking about this today. Will go for 2.25 inch piping.
Will this be ok using a k03 ?

Has anyone got any pictures of there custom pipework ?

Also can anyone recommend a good place to purchase the piping and silicone ? Any good sellers on Ebay ?

Cheers

 

Some good info on this thread

http://www.clubgti.com/forum/showthread.php?t=213836&highlight=Silicon+hoses.com

 

used derby performance hose off ebay

 

Me too... He's a good bloke.. I actually spoke to him about making ready to order custom pipe work for the mk2 20vt conversion... He's close by for me and the hoses are nice.....

 

Another 1 for DPH. They made a custom elbow for me and would use them again.