What Size Should 3b Dp Be?

[david]

I'm not 100% sure what the size of 3B Downpipe should be,but my looks quite large.Don't know if the previous owner change it,one thing i know it looks bigger than 2.5"

[Big Lee M]

I think it should be a 2.5" but it may have been changed to a RS2 downpipe as they are 2.75". They look a hell of a lot bigger than the standard one,i replaced mine with a RS2 downpipe.

[david]

Dp

I think it should be a 2.5" but it may have been changed to a RS2 downpipe as they are 2.75". They look a hell of a lot bigger than the standard one,i replaced mine with a RS2 downpipe.

Yeah,you could be right.Co's i always thought it was alot bigger than the original.It seem's the previous owner done a few mods on the car,this include cutting a larger hole in the air box.I think the wastegate is also a rs2's

[terrybullwon]

The waste gates are all the same, through out the IL5 range. Is the down pipe Stainless steel?

[david]

Dp

The waste gates are all the same, through out the IL5 range. Is the down pipe Stainless steel?

Yeah i think so,co's all the other exhaust bits are stainless.I had it done by LONGLIFE minus DP.

[david]

Dp

I think it should be a 2.5" but it may have been changed to a RS2 downpipe as they are 2.75". They look a hell of a lot bigger than the standard one,i replaced mine with a RS2 downpipe.

but what is the point of changing the downpipe if your not going to put a great big fat turbo on the car.would there be any gain at all,interm of hp?if any.And to cut the original air box as well,you think he was doing a 350hp projectI must say though,he done a good job on the air box

[Big Lee M]

One of the main reasons for the larger downpipe is it will let the turbo spool up a little quicker so better response from the turbo(a very little less lag,i doubt you'd notice). It helps the exhaust gases to exit quicker.

[david]

Dp

One of the main reasons for the larger downpipe is it will let the turbo spool up a little quicker so better response from the turbo(a very little less lag,i doubt you'd notice). It helps the exhaust gases to exit quicker.

i do get quite a fast spool up which i like,and since i chipped the car i've notice a massive improvement to the car.That dp is a bonus when i chuck in that RS2 engine

[Big Lee M]

Don't forget thought with the RS2 lump there is the bigger turbo which there will be a little more lag. But it will work well together

[david]

Dp

Don't forget thought with the RS2 lump there is the bigger turbo which there will be a little more lag. But it will work well together

is there anyway of combat this RS2 turbo lag?i believe the turbo kick's in around 3500rpm.

[Jamo]

The waste gates are all the same, through out the IL5 range. Is the down pipe Stainless steel?

No their not, they have different sized pistons

Remember Newsh's thread

[david]

dp

No their not, they have different sized pistons

Remember Newsh's thread

do you mean the waste gate are differen't?

[terrybullwon]

No their not, they have different sized pistons

Remember Newsh's thread

Indeed but its all relevant to a car with less than 350hp

[david]

dp

Indeed but its all relevant to a car with less than 350hp

but then it can be fitted to s2's,yes?