[Grand_hustle17]

I actually dont like 335i exhaust note.. Sounds stock with my bms downpipe

[Team503]

I ran AR catted downpipes with a stock exhaust for quite some time. No raspiness at all, nice throaty growl, zero drone.

Here's the dyno pull at Boost Logic. I'm running Wedge's baseline tune here.

You can't really hear the exhaust over the dyno whine at idle, but I assure you that I couldn't hear shit in the car unless the windows were down and I was romping on it.

[NocturnalEVO]

That does sound really good.
I wonder how the catted DP's will sound w/the Performance Exhaust.

[derryck]

Originally Posted by jtswole

Inlets don't do much on pump gas. Little gains.

Where did you get this info? I run 93 pump and my inlets made a very noticeable difference on my FBO RB car.

[dlbrooks18]

More spool like sirdaft1's car : http://www.e90post.com/forums/showth...light=sirdaft1

[JasW]

Originally Posted by NocturnalEVO

That does sound really good.
I wonder how the catted DP's will sound w/the Performance Exhaust.

As I mentioned in the other thread, there's no guarantee. But if there is any rasp, I would guess that it will not be as harsh and in as wide an RPM band as with catless (i.e., <1000 RPM of the band).

While the PE exhaust is different than the IS exhaust, both have been tuned to give a particular exhaust note. When you alter the flow with catless DPs or high-flow catted DPs, you're messing with that tuned sound. The IS exhaust is already higher flow than a stock 335i exhaust (as is the PE exhaust), so more flow on top off that gives the IS muffler a rasp note at higher RPMs (around 5000) in the lower gears.

You have to choose how badly you want to increase performance, knowing that the exhaust note in that higher RPM range may be altered. Try catted, as they may turn out to have minimal if any effect. Also, don't shy away from E85 and an upgraded LPFP. You have a tuner, so he should be able to give you both an E60ish map for ultimate power and a 93 octane map for when you go out of town/are away from E85 availability.

[NocturnalEVO]

Originally Posted by dlbrooks18

More spool like sirdaft1's car : http://www.e90post.com/forums/showth...light=sirdaft1

Holy crap!

that may change everything loll

[NocturnalEVO]

Originally Posted by JasW

As I mentioned in the other thread, there's no guarantee. But if there is any rasp, I would guess that it will not be as harsh and in as wide an RPM band as with catless (i.e., <1000 RPM of the band).

While the PE exhaust is different than the IS exhaust, both have been tuned to give a particular exhaust note. When you alter the flow with catless DPs or high-flow catted DPs, you're messing with that tuned sound. The IS exhaust is already higher flow than a stock 335i exhaust (as is the PE exhaust), so more flow on top off that gives the IS muffler a rasp note at higher RPMs (around 5000) in the lower gears.

You have to choose how badly you want to increase performance, knowing that the exhaust note in that higher RPM range may be altered. Try catted, as they may turn out to have minimal if any effect. Also, don't shy away from E85 and an upgraded LPFP. You have a tuner, so he should be able to give you both an E60ish map for ultimate power and a 93 octane map for when you go out of town/are away from E85 availability.

Yea its definitely a trade-off, depending on what you want more.
Me personally, I don't mind staying at my current spool/power levels if it means I don't take on drone/rasp.

As far as different maps for different fuels, how do you handle switching maps in different situations. For example, lets say i'm driving around on E85, and now have 1/4 tank left and need to fill up premium 93 octane.. Can i mixx both? or do i have to completely empty out every last bit of E85 before I can put in any 93 and THEN switch maps to 93 octane map? Is there a flex-fuel option out there?
This is where it becomes too complicated for me to bother with lol.

[NocturnalEVO]

I also did hear back from PTF regarding my tune, here was the response:

"We definitely use spool mode in all our tunes and have always. We actually posted a number of times in the past how great it is to have it in the DME. The tables we use, including single turbo tunes, are the following:

Spool Mode Max RPM
Ignition Timing (Spool)
Fuel (Spool)
Vanos Intake (Spool)
Vanos Exhaust (Spool)
Boost Control (WGDC) Spool"

And in a subsequent message

I’m updating your map. Your car is spooling great and if you look at your Load Request and Actual they reach each other very quickly.
Some of the other tables involved in boost control are the PID control tables as well, more specifically the proportional gain table (WGDC P-Factor) but that table is a general boost control table used at all times during boost targeting."

Gotta admit, I'm very happy with PTF. They always get back to me promptly, are very courteous, and really acknowledge everything I'm asking for, and are informative.

[V8bait]

For better spool assuming good tune and current mods, here's my ideas-

Best idea honestly is to stop being a baby crying about sound and go catless. Your hate of the sound is in your head, and also wrong, you'll understand just how wrong soon as you feel the power. Otherwise here's some ideas within your OP restrictions-

1) Nitrous to help offset lowend/spool.
2) Air to water intercooler to replace the VRSF with revamped, shorter piping.
3) Meth and E85 to replace any intercooler with shorter piping. (Edit- outside of your restrictions, disregard)
4) Engine work to increase displacement.
5) LS swap with stock turbos.

[NocturnalEVO]

Originally Posted by V8bait

For better spool assuming good tune and current mods, here's my ideas-

Best idea honestly is to stop being a baby crying about sound and go catless. Your hate of the sound is in your head, and also wrong, you'll understand just how wrong soon as you feel the power. Otherwise here's some ideas within your OP restrictions-

1) Nitrous to help offset lowend/spool.
2) Air to water intercooler to replace the VRSF with revamped, shorter piping.
3) Meth and E85 to replace any intercooler with shorter piping. (Edit- outside of your restrictions, disregard)
4) Engine work to increase displacement.
5) LS swap with stock turbos.

I appreciate the input. However, you need to understand that everyone on here is not a 20 year old kid just looking to drag race or make big power without any concern for anything else.

I take my entire family around in my car, not just wife or kids, but my elder parents, grand-parents, work superiors, and other professionals. I travel in areas where it's better not to make too much noise or stand out. There's a lot of different reasons why I don't want the extra volume and especially the raspiness or drone.

When I mentioned that I didn't want to do DP's in my car due to sound, I was referring to the rasp and drone, which it appears will be there due to the PE unless I add in resonators and put the secondary cats back in, which may be more trouble than its worth.

I'm perfectly fine keeping my setup as is if I have to. The purpose of this thread was to see if there's anything ELSE that I could be doing other than downpipes, meth/e85, replacing stock turbos, and needless to say replacing original engine...

[JasW]

Originally Posted by NocturnalEVO

As far as different maps for different fuels, how do you handle switching maps in different situations. For example, lets say i'm driving around on E85, and now have 1/4 tank left and need to fill up premium 93 octane.. Can i mixx both? or do i have to completely empty out every last bit of E85 before I can put in any 93 and THEN switch maps to 93 octane map? Is there a flex-fuel option out there?
This is where it becomes too complicated for me to bother with lol.

You just fill up the remaining 3/4ths of a tank with 93, switch maps, and you're good to go. People on 93 maps routinely add a few gallons of E85, particularly if their logs show timing corrections they want to smooth out (presuming they don't have a tuner to do so). You would likely be using an E60ish mix instead of 100% E85 because that's where you'll get the most power. So when you fill up with 93 having 1/4 of a tank of E60, you'll be at E23 -- pretty innocuous (some people go as high as E40 on 93 maps). There's a little thinking involved, but it's not complicated, particularly if you use the Blending ethanol and gas calculator.

[NocturnalEVO]

Originally Posted by JasW

You just fill up the remaining 3/4ths of a tank with 93, switch maps, and you're good to go. People on 93 maps routinely add a few gallons of E85, particularly if their logs show timing corrections they want to smooth out (presuming they don't have a tuner to do so). You would likely be using an E60ish mix instead of 100% E85 because that's where you'll get the most power. So when you fill up with 93 having 1/4 of a tank of E60, you'll be at E23 -- pretty innocuous (some people go as high as E40 on 93 maps). There's a little thinking involved, but it's not complicated, particularly if you use the Blending ethanol and gas calculator.

Ahh thanks for sharing! I'll definitely look into it more now.

Thanks a bunch!

[csu87]

Originally Posted by NocturnalEVO

I also did hear back from PTF regarding my tune, here was the response:

"We definitely use spool mode in all our tunes and have always. We actually posted a number of times in the past how great it is to have it in the DME. The tables we use, including single turbo tunes, are the following:

Spool Mode Max RPM
Ignition Timing (Spool)
Fuel (Spool)
Vanos Intake (Spool)
Vanos Exhaust (Spool)
Boost Control (WGDC) Spool"

And in a subsequent message

I’m updating your map. Your car is spooling great and if you look at your Load Request and Actual they reach each other very quickly.
Some of the other tables involved in boost control are the PID control tables as well, more specifically the proportional gain table (WGDC P-Factor) but that table is a general boost control table used at all times during boost targeting."

Gotta admit, I'm very happy with PTF. They always get back to me promptly, are very courteous, and really acknowledge everything I'm asking for, and are informative.

As mentioned before, you spool up pretty quickly and only way to get better is inlets if u dont want dps. Although dps with secondary cats in is not as loud and raspy as no dps and no secondary cats

[NoSlow5oh]

Originally Posted by NocturnalEVO

Ahh thanks for sharing! I'll definitely look into it more now.

Thanks a bunch!

Just to give you an example of the ease and benefits of some e85 - I have an ETS FMIC, but the rest of my car is bone stock down to the paper filter. I recently dynoed to see the power of the tunes. These pulls were all done one after another with 30% e85 in the tank.

Stock tune - 271rwhp/276rwtq

MHD Stage 1+FMIC 93 octane tune - 328rwhp/386rwtq

SPX Custom e30 tune - 407rwhp/468rwtq

So, 80rwhp/80rwtq from a few gallons of e85 in the tank. It takes 2 minutes to flash back between tunes if you want to or can't find e85 in your area, and it retains the stock feel and sound of the car which is a big plus for me.

[NocturnalEVO]

What are the things to look out for or be cautious of when using E85?

[JasW]

Originally Posted by NoSlow5oh

Just to give you an example of the ease and benefits of some e85 - I have an ETS FMIC, but the rest of my car is bone stock down to the paper filter. I recently dynoed to see the power of the tunes. These pulls were all done one after another with 30% e85 in the tank.

Stock tune - 271rwhp/276rwtq

MHD Stage 1+FMIC 93 octane tune - 328rwhp/386rwtq

SPX Custom e30 tune - 407rwhp/468rwtq

So, 80rwhp/80rwtq from a few gallons of e85 in the tank. It takes 2 minutes to flash back between tunes if you want to or can't find e85 in your area, and it retains the stock feel and sound of the car which is a big plus for me.

I think you're giving spxxx's tune short shrift there. A splash of E85 alone can't account for that kind of difference.

[csu87]

Originally Posted by NocturnalEVO

What are the things to look out for or be cautious of when using E85?

Lpfp and hpfp pressures are the biggest things

[NoSlow5oh]

Originally Posted by JasW

I think you're giving spxxx's tune short shrift there. A splash of E85 alone can't account for that kind of difference.

Not sure what you mean by short shrift. Changing the tune is the only thing that took place between the pulls. I posted the dyno chart and logs for proof.

[csu87]

Originally Posted by JasW

I think you're giving spxxx's tune short shrift there. A splash of E85 alone can't account for that kind of difference.

you can easily get over 400whp with a custom tune e85 blend.

The OTS maps are pretty conservative, especially the stage 1.

[JasW]

Originally Posted by NoSlow5oh

Not sure what you mean by short shrift. Changing the tune is the only thing that took place between the pulls. I posted the dyno chart and logs for proof.

Originally Posted by csu87

you can easily get over 400whp with a custom tune e85 blend.

The OTS maps are pretty conservative, especially the stage 1.

Not doubting the numbers, just saying that, as csu indicates, it was the custom tune from spxxx that did the most to give you those numbers -- not just putting in an E30 mix. You could have put in a E30 blend with the MHD Stage+1 FMIC map. But you wouldn't have put those kind of numbers down.

[PNWN54]

Originally Posted by dlbrooks18

More spool like sirdaft1's car : http://www.e90post.com/forums/showth...light=sirdaft1

Sounds a lot like my setup! BMS makes cowl delete kit which induces the engine sound into the cabin pretty well if you like engine noise.