Exhaust setups

[HaydEn]

i thought the 02 sensor was located before the cat on the VR ???

if so i cant see why you would have problems

That's what I thought going off the photos of systems I have seen.

However, this guy is not necessarily an expert he just said he's done a few mk4 32's.

But the situation could be rectified if I got the Magnaflow cat with the built in oxygen sensor mount; from this link, and weld it so the sensor is before the cat
42 Draft Designs

Thanks mrVR6exy

[VR28LT]

Yeah i know the later VRs have before and after the cat , but im pretty sure early 12v only have the one .

If i can remember Mickey ran that high flow cat from 42 DD and also Marty ( veedubs ) in his 3dr VR

If i can recall slight mods were needed to actually fit them but this was a while ago so dont take my word for it

[HaydEn]

Slight mod mods in term of making it fit under the car, I.e. Bashing in the floor pan. Or to the exhaust itself?

[schoona]

So, I've been thinking about getting an exhaust system. However, from what i have read is, the corrado is rated at a few kW more due to a 2.36" exhaust and different cat, compared to the golf's 2.25".

So theoretically, if I ran a 2.36" with a different cat i should see an increase in power, noise and still remain a healthy amount of back pressure. Or alternatively can I run a bit bigger, such as a 2.5, and not lose much down low torque/power and backpressure?

As for tips I have no idea; I've seen the usual types I.e Remus, Magnaflow etc. I was think maybe the Xforce Varex if anyone has used one?

What have some of you other VR6 guys done?

Hey dude,

where did you go in Newy?
Backpressure isn't right. You want good exhaust gas velocity and trying to aid scavenging (negative pressures being filled by the next exhausting cylinder so you have smooth flow). Then need to balance the speed becasue the wrong cooling rates affect the car.

There are heaps of threads on VR6 exhausts on here. My advice is buy the Magnaflow cat-back off the shelf system like what Mickey had on his VR. Go the cat as well.

My build thread has a video of what my 2.25" sounded like with a Magnaflow rear box.

My car was definitely peakier with the 2.25, but I haven't driven a 2.5". I made 108 fwkw with an open pod off the MAF lol.

[HaydEn]

I went to premier exhausts at sandgate. Just to get a rough idea on the cost.

Are you saying that 2.5" would lose a fair bit of back pressure?

I've heard your Magnaflow and it does sound very good.

[schoona]

You probably went to the one of the best places in Newcastle for exhausts. Brendan can put together some mint systems with custom rear boxes.

If you don't want off the shelf, go to him. Yes he's expensive but it's his craft and you gotta pay to play.

As I said, I haven't driven a 2.5" but my 2.25 was noticeably better up top ("kicked" after 3.5k). Dunno if that was at the expense of bottom end or just gains at the top though.

[HaydEn]

You probably went to the one of the best places in Newcastle for exhausts. Brendan can put together some mint systems with custom rear boxes.

If you don't want off the shelf, go to him. Yes he's expensive but it's his craft and you gotta pay to play.

As I said, I haven't driven a 2.5" but my 2.25 was noticeably better up top ("kicked" after 3.5k). Dunno if that was at the expense of bottom end or just gains at the top though.

I have heard quite a bit about him, I am still tossing up a custom or off the shelf, but I'm going to get a cat back including a 200cell cat. And then later on add headers and the rest of piping. At least that is the plan.

[Golf Loon]

Just on a point of note and back to the original post. Corrado is a 2.9, compared to the Golf 2.8 which would account for more Hp than the exhaust alone.

[HaydEn]

Just on a point of note and back to the original post. Corrado is a 2.9, compared to the Golf 2.8 which would account for more Hp than the exhaust alone.

I completely forgot about that fact.
Have you got a preference on an exhaust size Matt?

[ECS tuning]

He are some VR6 exhaust we carry for the MK3, let me know if you have any questions!




Link to all the kits -
OEM / Performance Parts for Audi, BMW, Mercedes Benz, Mini, Porsche & Volkswagen - ECS Tuning