Exhaust.

[tbtree55]

hopeing some 1.4t guys chime in on this too.. if i buy a high flow cat from zzp for the 1.4t, can i have a shop cut it and replace my 2nd cat with it?
i was gunna have them do the high flow cat and then do a custom 2.25 in catback with an after market muffler... but will the cat replacement make a difference? also, what muffler would sound the best on the 1.8.. i cant stand how quiet it is anymore!

 

[rdss]

The test pipe/second cat section of the exhaust is the same no matter what motor or body style.

 

[tbtree55]

ahh i gotcha.. but on the 1.8 will the hi flow cat really make a difference?

 

[rdss]

It's the same as any other exhaust (V-8, V-6, 1.4t or 1.8). If the high flow cat will pass more air through it than the stock cat it helps. It's still a blockage in the exhuast and one would think that DDM and ZZP went with the best/free flowing high flow cat that they could get.

 

[tbtree55]

It's the same as any other exhaust (V-8, V-6, 1.4t or 1.8). If the high flow cat will pass more air through it than the stock cat it helps. It's still a blockage in the exhuast and one would think that DDM and ZZP went with the best/free flowing high flow cat that they could get.

alright thanks.. and also.. 2.25 in pipe would be the best for the 1.8 right? since it still needs some back pressure

 

[rdss]

2.25" has been recommended as the biggest pipe needed on the 1.8 with no real research. At the power levels they are running now it's probably just fine. I would consider going up to 2.5" for the test pipe and then back down to 2.25" for the cat back because the ZZP catted test pipe is quite a bit cheaper than the DDM. I'm actually considering getting rid of my DDM test pipe and going to the ZZP test pipe and mid pipe to get 2.5" pipe front to back.

 

[DevilSonic89]

2.25" has been recommended as the biggest pipe needed on the 1.8 with no real research. At the power levels they are running now it's probably just fine. I would consider going up to 2.5" for the test pipe and then back down to 2.25" for the cat back because the ZZP catted test pipe is quite a bit cheaper than the DDM. I'm actually considering getting rid of my DDM test pipe and going to the ZZP test pipe and mid pipe to get 2.5" pipe front to back.

Im a 1.8 owner and i have a custom 2.5 cat back with a mflow glasspack muffler and she sounds amazing. I been getting alot of compliments

 

[rdss]

Cool, I bet it does sound great. I would still love to see the power gain/loss associated with that large of pipe on the NA 1.8. A dyno (on the same car, location and time/date) of stock, 2.25" and 2.5" would also be interesting to see as well.

 

[tbtree55]

Im a 1.8 owner and i have a custom 2.5 cat back with a mflow glasspack muffler and she sounds amazing. I been getting alot of compliments

do you have an exhaust video? didnt see one on your youtube channel

 

[DevilSonic89]

I havent made one yet:/ camera not working right:/

 

[tbtree55]

what size glass pack?

 

[DevilSonic89]

Outlet 2.5 / 18inch glasspack
I got it at pepboys.

 

[DevilSonic89]

Cool, I bet it does sound great. I would still love to see the power gain/loss associated with that large of pipe on the NA 1.8. A dyno (on the same car, location and time/date) of stock, 2.25" and 2.5" would also be interesting to see as well.

She does and actually the car felt more responsive with this mod lol. But that might just be a placebo...i will take a video on wed.

 

[tbtree55]

She does and actually the car felt more responsive with this mod lol. But that might just be a placebo...i will take a video on wed.

alright, cool.. cant wait to hear what this sounds like

 

[doreo]

lol rdss we cant get 1 1.8 on a dyno let alone 3

 

[$ub$onic]

Ill take a video of my exhaust this week. I took my magnaflow cat back, took the muffler off and added the zzp muffler delete. So it goes from 2 1/4 to 2.5 with a 4 inch tip. I think sounds good

 

[rdss]

lol rdss we cant get 1 1.8 on a dyno let alone 3

Agreed. 1.4's aren't much better. But, these are eco boxes with potential not sports car.

 

[mitdr774]

Until I swap out the temp. cat. installed in my car it would be pointless to dyno mine.

 

[DevilSonic89]

How big is the zzp downpipe for the header set for the 1.8???

 

[mitdr774]

I currently have the DDM pipe in my car and it is 2.25, whereas the ZZP pipe is 2.5. My main reason for the swap is for the cat. The header midpipe is 2.25 if my memory is correct. I had to bodge some **** together to temp fit the cat in it now. It looks like ass and needs fixed badly. Probably chokes the exhaust a bit as well.