About to add ER Catless Downpipes...

[bmeaggie]

What change in sound should I expect?

I currently have the Dinan "axle-back" setup, and I am very happy with the sound.

I'm installing the Downpipes for performance, but even further improved sound would be a bonus.

Thanks in advance for any insight.

[ShlemonboostedM]

don't expect huge gains.. but let us know how you like it .. also how much louder is dinan vs stock was thinking of getting that exhaust ...

[s0ul]

Are you running a tune? You will definitely get a big difference in sound. As far as gains, running a tuner will show significant gains. If not, you should get a CEL, unless you got CEL Delete.

[bmeaggie]

Originally Posted by ShlemonboostedM

don't expect huge gains.. but let us know how you like it .. also how much louder is dinan vs stock was thinking of getting that exhaust ...

I have been very happy with the Dinan. I would buy the same again, if had to do over.

I got it new online and installed myself in my garage by backing my car up onto GoRhino oil change ramps, climbing underneath and going to work.

It sounds a little louder, deeper tone, with more rumble and gurgles. Same valve function.

It was the least expensive of the exhaust systems I was looking at. Probably came down to Dinan and BMW MPerf exhaust for me, and I feel like you get the same for either, and the Dinan costs less.

[Kr3st]

Originally Posted by ShlemonboostedM

don't expect huge gains.. but let us know how you like it .. also how much louder is dinan vs stock was thinking of getting that exhaust ...

The S55 picks up good power going to catless downpipes. ~30whp.

I would say that's pretty good gains.

[ShlemonboostedM]

Originally Posted by Kr3st

The S55 picks up good power going to catless downpipes. ~30whp.

I would say that's pretty good gains.

Lol no your not gaining 30whp from downpipes sorry .. i already discussed that in another treat .. your gaining 10-15whp maximum and shitty torq curve when on pump gas and theirs no gains if you use e85 on map 2 or map 7 .. thats why people being so surprised after installing downpipes and feel no gain in power .. I also had this discussion with Terry and he suggested me that downpipes aren't necessary on stock turbos and that i should not expect any gains from them .. and Stock dp flows just fine .. I was on the fence of getting them but Changed my mind going threw all this headache and Removal if going to do warranty work .. Just get nice Axle back and be done with it ..

[bmeaggie]

Originally Posted by s0ul

Are you running a tune? You will definitely get a big difference in sound. As far as gains, running a tuner will show significant gains. If not, you should get a CEL, unless you got CEL Delete.

See some mods in my signature.

I have BMS JB4 with all connections, BMS CAI, Dinan Exhaust and some other stuff.

Usually drive on JB4 Map 2 with 93 octane pump gas.

My car is loud enough to turn heads and gain plenty of attention with the current mods.

So my biggest concern with installing the DP's is that my car will become too loud for suburban society.

I guess I could always set the exhaust valves to closed full-time, drive in "efficient" and JB4 Map 4 when in the neighborhood if needed.

[Mike@N54Tuning.com]

Originally Posted by bmeaggie

What change in sound should I expect?

I currently have the Dinan "axle-back" setup, and I am very happy with the sound.

I'm installing the Downpipes for performance, but even further improved sound would be a bonus.

Thanks in advance for any insight.

You'll get a noticeable increase in power, with better turbo spool and a nice deaper throatier exhaust tone.

Mike

[Kr3st]

Originally Posted by ShlemonboostedM

Lol no your not gaining 30whp from downpipes sorry .. i already discussed that in another treat .. your gaining 10-15whp maximum and shitty torq curve when on pump gas and theirs no gains if you use e85 on map 2 or map 7 .. thats why people being so surprised after installing downpipes and feel no gain in power .. I also had this discussion with Terry and he suggested me that downpipes aren't necessary on stock turbos and that i should not expect any gains from them .. and Stock dp flows just fine .. I was on the fence of getting them but Changed my mind going threw all this headache and Removal if going to do warranty work .. Just get nice Axle back and be done with it ..

http://f80.bimmerpost.com/forums/sho...25&postcount=3

http://f80.bimmerpost.com/forums/sho....php?t=1179886

[ShlemonboostedM]

Originally Posted by Kr3st

http://f80.bimmerpost.com/forums/sho...25&postcount=3

http://f80.bimmerpost.com/forums/sho....php?t=1179886

[Kr3st]

Originally Posted by ShlemonboostedM

Andrew@ActiveAutowerke
mike@x-ph.com
tom @ eas
Mike@N54Tuning.com

Can you guys chime in on whether or not catless downpipes make power or not?

From the research I've done and seen, it looks like they produce a quicker spool, better throttle response and ~25whp/wtq gains.

[bmeaggie]

Originally Posted by Kr3st

Andrew@ActiveAutowerke
mike@x-ph.com
tom @ eas
Mike@N54Tuning.com

Can you guys chime in on whether or not catless downpipes make power or not?

From the research I've done and seen, it looks like they produce a quicker spool, better throttle response and ~25whp/wtq gains.

I have always understood the stock catted Downpipes to be pretty much the most restrictive place in the car's exhaust system.

I would also expect power gained to have a direct relationship with how much power the engine is making after other mods.

So it wouldn't be surprising to me if the +30 whp is on a car with a tune and larger turbos.

I would be happy with another 15-20 whp and deeper/more throaty exhaust tone.

[Jeff@TopGearSolutions]

Originally Posted by bmeaggie

I have always understood the stock catted Downpipes to be pretty much the most restrictive place in the car's exhaust system.

I would also expect power gained to have a direct relationship with how much power the engine is making after other mods.

So it wouldn't be surprising to me if the +30 whp is on a car with a tune and larger turbos.

I would be happy with another 15-20 whp and deeper/more throaty exhaust tone.

15-20WHP is a reasonable expectancy. As you said, further mods may find more power but the relationship to power is always dependent on the tune as well as the other mods in the equation.

[Mike@N54Tuning.com]

Definitely make power in the ~20/hp/tq range. Also increase Turbos spool and throttle response. On a Turbo car getting better flowing downpipes is one of the best bolt on mods you can do.

Mike

[mike@x-ph.com]

Originally Posted by bmeaggie

What change in sound should I expect?

I currently have the Dinan "axle-back" setup, and I am very happy with the sound.

I'm installing the Downpipes for performance, but even further improved sound would be a bonus.

Thanks in advance for any insight.

Expect your exhaust to sound louder and much better

As mentioned above catless downpipes increase turbo spool and throttle response. You will feel a noticeable increase in power, but wont get 100% the gains unless you have a map optimized for your mods

[tom @ eas]

Originally Posted by bmeaggie

I have always understood the stock catted Downpipes to be pretty much the most restrictive place in the car's exhaust system.

I would also expect power gained to have a direct relationship with how much power the engine is making after other mods.

So it wouldn't be surprising to me if the +30 whp is on a car with a tune and larger turbos.

I would be happy with another 15-20 whp and deeper/more throaty exhaust tone.

Originally Posted by bmeaggie

I have always understood the stock catted Downpipes to be pretty much the most restrictive place in the car's exhaust system.

I would also expect power gained to have a direct relationship with how much power the engine is making after other mods.

So it wouldn't be surprising to me if the +30 whp is on a car with a tune and larger turbos.

I would be happy with another 15-20 whp and deeper/more throaty exhaust tone.

The stock exhaust system is very good, aftermarket exhaust systems are merely weight/style/sound on this platform for DDs. However, catless downpipes can free up a tiny bit of hp.

ER Downpipes see an approximate ~10whp gain on a stock platform, this is what we see in-house on our dynojet.

[Tiago@VRSF]

You'll definitely notice an increase in HP with a catless downpipe

[ShlemonboostedM]

Originally Posted by tom @ eas

The stock exhaust system is very good, aftermarket exhaust systems are merely weight/style/sound on this platform for DDs. However, catless downpipes can free up a tiny bit of hp.

ER Downpipes see an approximate ~10whp gain on a stock platform, this is what we see in-house on our dynojet.

+1

[bmeaggie]

Just installed these today.

Only had the drive home from the shop so far to try them out, but when I started her up and gave her a rev in the service drive, I instantly noticed the difference in sound. Reminded me of my GT500.

For anyone considering, it's not stupid loud, but just about as far as you can go without getting there.

[Irishsig]

Originally Posted by bmeaggie

Just installed these today.

Only had the drive home from the shop so far to try them out, but when I started her up and gave her a rev in the service drive, I instantly noticed the difference in sound. Reminded me of my GT500.

For anyone considering, it's not stupid loud, but just about as far as you can go without getting there.

Did this add rasp when you got on the throttle?
Is there any drone when cruising on highway?
Or is it just a deeper tone?

[mike@x-ph.com]

Originally Posted by bmeaggie

Just installed these today.

Only had the drive home from the shop so far to try them out, but when I started her up and gave her a rev in the service drive, I instantly noticed the difference in sound. Reminded me of my GT500.

For anyone considering, it's not stupid loud, but just about as far as you can go without getting there.

Lets hear it

[Mike@N54Tuning.com]

Originally Posted by Irishsig

Did this add rasp when you got on the throttle?
Is there any drone when cruising on highway?
Or is it just a deeper tone?

There should definitely be zero drone, and a much deeper sound. Hopefully he can post some videos so we can hear it

Mike