Speedriven V12 SS Downpipes/DIY Flanges
Super Member
Joined: Jul 2013
Posts: 930
Likes: 24
06 SL65AMG, 13 Tesla Model S 60kwh, 02 Jaguar S-Type 3.0, 12 S550 4 Matic, 07 E320 Bluetec, 06 LX470
Pre Dyno tune results were 564.xx can't remember the last two decimal points, then we tested the car for a few runs and the throttle position sensor went out of whack so we need to replace it. But lower end has improved now, once the TPS is replaced, we will dyno it again so we can get the correct numbers as throttle wont be restricted.
As for driving it, feels much more torque. TC is keeps lighting up like crazy now even when I'm rolling, hopefully the special Quaife LSD I had to order from the UK will help once it gets here
As for driving it, feels much more torque. TC is keeps lighting up like crazy now even when I'm rolling, hopefully the special Quaife LSD I had to order from the UK will help once it gets here
Super Member
Joined: Jan 2012
Posts: 883
Likes: 24
From: Finland
SL600 / SL450 (107) / E350 / BMW M5 E60 / BMW 745i (E23) / BMW X6M / Toyota Hilux 4 WD/ Honda CBX 10
Pre Dyno tune results were 564.xx can't remember the last two decimal points, then we tested the car for a few runs and the throttle position sensor went out of whack so we need to replace it. But lower end has improved now, once the TPS is replaced, we will dyno it again so we can get the correct numbers as throttle wont be restricted.
As for driving it, feels much more torque. TC is keeps lighting up like crazy now even when I'm rolling, hopefully the special Quaife LSD I had to order from the UK will help once it gets here
As for driving it, feels much more torque. TC is keeps lighting up like crazy now even when I'm rolling, hopefully the special Quaife LSD I had to order from the UK will help once it gets here
Super Member
Joined: Jul 2013
Posts: 930
Likes: 24
06 SL65AMG, 13 Tesla Model S 60kwh, 02 Jaguar S-Type 3.0, 12 S550 4 Matic, 07 E320 Bluetec, 06 LX470
Yeah built a new intake but can't take it on the dyno yet since I have a bad strut. We tried and the side with the bad strut did a crazy rodeo on the dyno at 140+ mph so we are replacing the strut and doing a dyno run next week. But from the way it feels, much better then the OEM Air Boxes.
On 03-08 SLs you can't put a cold air intake in the front their no room so I did a 3 inch short ram with filters right where the holes are for air to come in thru the radiator. Feels alot better now esp in high rpms starting in 2nd gear when its sucking up a lot of air and you can hear the turbos sucking that air up
On 03-08 SLs you can't put a cold air intake in the front their no room so I did a 3 inch short ram with filters right where the holes are for air to come in thru the radiator. Feels alot better now esp in high rpms starting in 2nd gear when its sucking up a lot of air and you can hear the turbos sucking that air up
MBWorld Fanatic!
Joined: Feb 2004
Posts: 9,155
Likes: 20
From: Southern, CA.
V12-Biturbo
short ram air intakes..
Yeah built a new intake but can't take it on the dyno yet since I have a bad strut. We tried and the side with the bad strut did a crazy rodeo on the dyno at 140+ mph so we are replacing the strut and doing a dyno run next week. But from the way it feels, much better then the OEM Air Boxes.
On 03-08 SLs you can't put a cold air intake in the front their no room so I did a 3 inch short ram with filters right where the holes are for air to come in thru the radiator. Feels alot better now esp in high rpms starting in 2nd gear when its sucking up a lot of air and you can hear the turbos sucking that air up
On 03-08 SLs you can't put a cold air intake in the front their no room so I did a 3 inch short ram with filters right where the holes are for air to come in thru the radiator. Feels alot better now esp in high rpms starting in 2nd gear when its sucking up a lot of air and you can hear the turbos sucking that air up
PS the sounds you hear now AREN'T from improved airflow
the oem boxes made of plastic w/internal flat filters actually muffle the wastegate/BOV noises greatly, & made intentionally to do so as normal/average customers don't appreciate these sounds like us.Vs ur short metal ram intakes w/cones, they enhance all turbo noises (metal piping & external filters augment this greatly) down side to ur intakes is HEAT SOAK try dynoing this intake w/your hood closed to more acurately duplicate real world conditions & compare to oem boxes you'll see
try & touch them even after just 5-10 min of driving..You've just made your sl slower, even tho filters are close to oem air holes the metal piping negates this as piping is superheated vs oem plastic that doesnt conduct heat like metal etc.. PS what happened to Paypal for IC's?
Super Member
Joined: Jul 2013
Posts: 930
Likes: 24
06 SL65AMG, 13 Tesla Model S 60kwh, 02 Jaguar S-Type 3.0, 12 S550 4 Matic, 07 E320 Bluetec, 06 LX470
I think the feel is good right now since DC is freezing right now so there's not much heat to soak up but its prob gonna be the case when it starts warming up. The intakes is with 3 inch aluminium pipe and silicon tubing. I'm gonna get a dyno run on it soon and also test it on the track.
Once the black series kit goes on soon I want to try the front mount CAI, since in hotter weather the radiator would prob blast warm air into the filters but after going an hour at 70-90 mph speeds the cones are still pretty cool so its prob the below freezing weather DC is having that's keeping them cool.
Send me a PM of the email I'm suppose to paypal to I was about to send you a text lol
Once the black series kit goes on soon I want to try the front mount CAI, since in hotter weather the radiator would prob blast warm air into the filters but after going an hour at 70-90 mph speeds the cones are still pretty cool so its prob the below freezing weather DC is having that's keeping them cool.
Send me a PM of the email I'm suppose to paypal to I was about to send you a text lol
MBWorld Fanatic!
Joined: Feb 2004
Posts: 9,155
Likes: 20
From: Southern, CA.
V12-Biturbo
I think the feel is good right now since DC is freezing right now so there's not much heat to soak up but its prob gonna be the case when it starts warming up. The intakes is with 3 inch aluminium pipe and silicon tubing. I'm gonna get a dyno run on it soon and also test it on the track.
Once the black series kit goes on soon I want to try the front mount CAI, since in hotter weather the radiator would prob blast warm air into the filters but after going an hour at 70-90 mph speeds the cones are still pretty cool so its prob the below freezing weather DC is having that's keeping them cool.
Send me a PM of the email I'm suppose to paypal to I was about to send you a text lol
Once the black series kit goes on soon I want to try the front mount CAI, since in hotter weather the radiator would prob blast warm air into the filters but after going an hour at 70-90 mph speeds the cones are still pretty cool so its prob the below freezing weather DC is having that's keeping them cool.
Send me a PM of the email I'm suppose to paypal to I was about to send you a text lol
MBWorld Fanatic!
Joined: Feb 2004
Posts: 9,155
Likes: 20
From: Southern, CA.
V12-Biturbo
Hmm...
I think the feel is good right now since DC is freezing right now so there's not much heat to soak up but its prob gonna be the case when it starts warming up. The intakes is with 3 inch aluminium pipe and silicon tubing. I'm gonna get a dyno run on it soon and also test it on the track.
Once the black series kit goes on soon I want to try the front mount CAI, since in hotter weather the radiator would prob blast warm air into the filters but after going an hour at 70-90 mph speeds the cones are still pretty cool so its prob the below freezing weather DC is having that's keeping them cool.
Send me a PM of the email I'm suppose to paypal to I was about to send you a text lol
Once the black series kit goes on soon I want to try the front mount CAI, since in hotter weather the radiator would prob blast warm air into the filters but after going an hour at 70-90 mph speeds the cones are still pretty cool so its prob the below freezing weather DC is having that's keeping them cool.
Send me a PM of the email I'm suppose to paypal to I was about to send you a text lol
I was trying to explain to you that the ACTUAL metal piping part of your short ram intakes will be heatsoaked in few minutes, NOT the actual cone airfilters, the aluminum is far better than mild steel or ss steel but STILL conducts heat in mere min.. (try touching the actual aluminum tubing that runs to turbo inlets
ya oven mitts needed NOT good for any CAI perf whatsoeve)That is the main problem, the intake pipings positioned right next to ur exhaust manifolds & engine block, couple that to sealed engine bay the majority of air your intakes get will be blistering furnace heat ie even w/freezing ambient air temps, as soon as those pipes heat up & u drop to cruising speeds or stop in traffic, your perf will be horrible vs oem boxes etc..
Last edited by Thericker; Feb 13, 2014 at 07:20 PM.
MBWorld Fanatic!
Joined: Jan 2011
Posts: 1,181
Likes: 59
CL65
How about some pics, and stop dumping on the downpipe thread, I keep thinking there is an update on some performance gains. LOL Hopefully you will get your strut situation resolved and weather will allow you to get a good pass before Sean's sarcastic facts are proven to be very correct. It really becomes a rock and a hard place. Draw from in front of the grille and you be have only one filter sucking up water if you get caught in the rain. If you stay behind the radiator support then summer time heat is insane. The volume shouldn't choke it up will a scorpion like double barrel filter setup, however, as mentioned the heat will take its toll.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Super Member
Joined: Jul 2013
Posts: 930
Likes: 24
06 SL65AMG, 13 Tesla Model S 60kwh, 02 Jaguar S-Type 3.0, 12 S550 4 Matic, 07 E320 Bluetec, 06 LX470
This should be linked to all the other threads lol, I posted results with downpipes with no air boxes as OEM air boxes restrict the air flow with 3 inch downpipes. car went from 540ish rwhp to 634.81 with no boxes, dyno sheet is on the R230 section, but the best run turned out to be a 636 run.
Once I get the strut fix I'll do another dyno run. I'm thinking about maybe doing the whole piping with silicone tubing but I wanted something temp for now. I wont be able to do a front radiator mount till black series kit goes on till march but on the 03-08 models those round head lights make it hard to mount them in the front.
I was debating that fact to with rain but I'm gonna have to research what can be done about avoiding getting water sucked up thru the intake
Once I get the strut fix I'll do another dyno run. I'm thinking about maybe doing the whole piping with silicone tubing but I wanted something temp for now. I wont be able to do a front radiator mount till black series kit goes on till march but on the 03-08 models those round head lights make it hard to mount them in the front.
I was debating that fact to with rain but I'm gonna have to research what can be done about avoiding getting water sucked up thru the intake
Super Member
Joined: Jul 2013
Posts: 930
Likes: 24
06 SL65AMG, 13 Tesla Model S 60kwh, 02 Jaguar S-Type 3.0, 12 S550 4 Matic, 07 E320 Bluetec, 06 LX470
https://mbworld.org/forums/attachmen...pipes-sl65.jpg
Heres the dyno sheet for the 2nd best run with no air boxes
Heres the dyno sheet for the 2nd best run with no air boxes
MBWorld Fanatic!
Joined: Feb 2004
Posts: 9,155
Likes: 20
From: Southern, CA.
V12-Biturbo
No sarcasm meant.. Rather just frustrated trying to help him..
How about some pics, and stop dumping on the downpipe thread, I keep thinking there is an update on some performance gains. LOL Hopefully you will get your strut situation resolved and weather will allow you to get a good pass before Sean's sarcastic facts are proven to be very correct. It really becomes a rock and a hard place. Draw from in front of the grille and you be have only one filter sucking up water if you get caught in the rain. If you stay behind the radiator support then summer time heat is insane. The volume shouldn't choke it up will a scorpion like double barrel filter setup, however, as mentioned the heat will take its toll.
Edit: Zero possibility Hydrolocking w/outside filters lol.. Only way this would happen is if you drove your SL thru standing water deep enough to reach your airfilters. Seriously Ive ran outside filters for 5+ yrs not only thru good rainy down pour but thru the car wash too.. You'd have to hold your garden hose right into airfilters & blast w/water etc it aint gonna happen people, even if you did this to unmodified oem intake on ANY car you'd Hydrolock it.. Normal weather or carwash conditions will never replicate this..
Last edited by Thericker; Feb 13, 2014 at 10:44 PM.
MBWorld Fanatic!
Joined: Jan 2011
Posts: 1,181
Likes: 59
CL65
Not repeat same mistakes I & many other V12tt owners have already done.. Answer here is fab entire CAI w/silicone piping it mitigates heatsoak vs metal versions & you can run ever increasing pipe diameter to front oem air openings, I ran up to 4.5" dia if memory serves (you cant do this w/metal tubing as there's myriad of protrusions that the silicone tubing easily accomadate etc) The BEST option though is cut the oem holes open (requires some steady handed cutting tools) to run airfilters outside engine bay
Edit: Zero possibility Hydrolocking w/outside filters lol.. Only way this would happen is if you drove your SL thru standing water deep enough to reach your airfilters. Seriously Ive ran outside filters for 5+ yrs not only thru good rainy down pour but thru the car wash too.. You'd have to hold your garden hose right into airfilters & blast w/water etc it aint gonna happen people, even if you did this to unmodified oem intake on ANY car you'd Hydrolock it.. Normal weather or carwash conditions will never replicate this..
Edit: Zero possibility Hydrolocking w/outside filters lol.. Only way this would happen is if you drove your SL thru standing water deep enough to reach your airfilters. Seriously Ive ran outside filters for 5+ yrs not only thru good rainy down pour but thru the car wash too.. You'd have to hold your garden hose right into airfilters & blast w/water etc it aint gonna happen people, even if you did this to unmodified oem intake on ANY car you'd Hydrolock it.. Normal weather or carwash conditions will never replicate this..
Super Member
Joined: Jan 2012
Posts: 883
Likes: 24
From: Finland
SL600 / SL450 (107) / E350 / BMW M5 E60 / BMW 745i (E23) / BMW X6M / Toyota Hilux 4 WD/ Honda CBX 10
This should be linked to all the other threads lol, I posted results with downpipes with no air boxes as OEM air boxes restrict the air flow with 3 inch downpipes. car went from 540ish rwhp to 634.81 with no boxes, dyno sheet is on the R230 section, but the best run turned out to be a 636 run.
Once I get the strut fix I'll do another dyno run. I'm thinking about maybe doing the whole piping with silicone tubing but I wanted something temp for now. I wont be able to do a front radiator mount till black series kit goes on till march but on the 03-08 models those round head lights make it hard to mount them in the front.
I was debating that fact to with rain but I'm gonna have to research what can be done about avoiding getting water sucked up thru the intake
Once I get the strut fix I'll do another dyno run. I'm thinking about maybe doing the whole piping with silicone tubing but I wanted something temp for now. I wont be able to do a front radiator mount till black series kit goes on till march but on the 03-08 models those round head lights make it hard to mount them in the front.
I was debating that fact to with rain but I'm gonna have to research what can be done about avoiding getting water sucked up thru the intake
MBWorld Fanatic!
Joined: Mar 2009
Posts: 2,630
Likes: 9
From: Chicago
W215 V12TT Build by Speedriven, W221 S550 4Matic
Hold on, so eliminating the oem intake boxes will give our cars an extra 90rwhp something is off here. Calling Speedriven on this topic is this true? or far from it? Our intakes have not as much restriction as our OEM manifolds which are the cause of airflow, so Its hard to believe changing intakes alone will open up that much airflow since we are still running OEM manifolds that will hold up that air even with 3 inch downpipes
MBWorld Fanatic!
Joined: Aug 2013
Posts: 1,077
Likes: 80
From: Anchorage
05 CL65
Given our terrible airbox design it would not suprise me to see impressive gains with a better flowing intake system. Not sure about 90 HP but I wouldn't disagree it's possible with the right combo of other mods, especially if someone has dyno evidence. Like others have said, the small turbos and exhaust manifolds are no doubt a big restriction that can't be fixed with intake mods.
After all, turbos & blowers are really good at pushing air, but not very good at pulling it. I went from 618/662 to 697/734 RWHP/TQ with my Lightning when I swapped a bigger plenum, TB, and intake tube/filter on.
After all, turbos & blowers are really good at pushing air, but not very good at pulling it. I went from 618/662 to 697/734 RWHP/TQ with my Lightning when I swapped a bigger plenum, TB, and intake tube/filter on.
MBWorld Fanatic!
Joined: Jan 2007
Posts: 1,986
Likes: 9
From: Toronto
V12TT
I don't have the these exact ones but custom fabricated something similar. I must say for you guys who are after performance this is a must. Love the exhaust sound and turbo spooling noise.
But just don't know how to put that much torque down to the ground and actually get the car moving
But just don't know how to put that much torque down to the ground and actually get the car moving
Super Member
Joined: Jul 2013
Posts: 930
Likes: 24
06 SL65AMG, 13 Tesla Model S 60kwh, 02 Jaguar S-Type 3.0, 12 S550 4 Matic, 07 E320 Bluetec, 06 LX470
Given our terrible airbox design it would not suprise me to see impressive gains with a better flowing intake system. Not sure about 90 HP but I wouldn't disagree it's possible with the right combo of other mods, especially if someone has dyno evidence. Like others have said, the small turbos and exhaust manifolds are no doubt a big restriction that can't be fixed with intake mods.
After all, turbos & blowers are really good at pushing air, but not very good at pulling it. I went from 618/662 to 697/734 RWHP/TQ with my Lightning when I swapped a bigger plenum, TB, and intake tube/filter on.
After all, turbos & blowers are really good at pushing air, but not very good at pulling it. I went from 618/662 to 697/734 RWHP/TQ with my Lightning when I swapped a bigger plenum, TB, and intake tube/filter on.
Also with your TB did you upgrade from the 600 to 65 TB or get something special? I got a spare 65 TB I was thinking about boring out even if its 2-4 more mm I'm curious what gains ill get even if it's a little
Super Member
Joined: Jul 2013
Posts: 930
Likes: 24
06 SL65AMG, 13 Tesla Model S 60kwh, 02 Jaguar S-Type 3.0, 12 S550 4 Matic, 07 E320 Bluetec, 06 LX470
Both struts been changed and ABC works fine again. Just waiting on dyno time since Eurocharged DC has a sale right now till Friday and all the dyno time is being taken up.
If I'm lucky Friday I might be able to some runs in. Also have a 5 gal drum of Q16 ready to go.
On the side note not though my LSD for my SL65 is in now and holy ****tt!!! Car hooks sooo much better now. No more crazy Christmas tree lighting up in my dash. I do get it but it's very rare now and the traction control fixes itself much much faster. Gonna get toe links soon and that should keep the car straight with the help of the LSD
If I'm lucky Friday I might be able to some runs in. Also have a 5 gal drum of Q16 ready to go.
On the side note not though my LSD for my SL65 is in now and holy ****tt!!! Car hooks sooo much better now. No more crazy Christmas tree lighting up in my dash. I do get it but it's very rare now and the traction control fixes itself much much faster. Gonna get toe links soon and that should keep the car straight with the help of the LSD
MBWorld Fanatic!
Joined: Mar 2009
Posts: 2,630
Likes: 9
From: Chicago
W215 V12TT Build by Speedriven, W221 S550 4Matic
If I wasn't there for those dyno pulls and got those dyno sheets I wouldn't believe it either but I had easy 7 runs from 630-636 back to back when OEM air boxes were pulled out when I had my 3 inch exhaust in. If you pull out the air box you can see it gets really narrow when it goes down from the filters to the turbo. I was thinking about trying to cut and mod my OEM air box so it would have a much bigger hole from filter to turbo.
Also with your TB did you upgrade from the 600 to 65 TB or get something special? I got a spare 65 TB I was thinking about boring out even if its 2-4 more mm I'm curious what gains ill get even if it's a little
Also with your TB did you upgrade from the 600 to 65 TB or get something special? I got a spare 65 TB I was thinking about boring out even if its 2-4 more mm I'm curious what gains ill get even if it's a little
Super Member
Joined: Jul 2013
Posts: 930
Likes: 24
06 SL65AMG, 13 Tesla Model S 60kwh, 02 Jaguar S-Type 3.0, 12 S550 4 Matic, 07 E320 Bluetec, 06 LX470
With just ECU tune, stock exhaust and air box it was 565
ECU Tune with 3 Inch Full Custom Exhaust and OEM Air boxes it dropped to 540s
ECU Tune, 3 Inch Full Exhaust and no air box 636
So we def figured out it was the air box causing the car to choke up so now we are making intakes and testing out different ones to see what works best
But heres the link to the with the dyno sheet from ECU tune compared to ECU/3 inch/no air box. The sheet has 634 but there was a run we missed that got 636.
https://mbworld.org/forums/attachmen...pipes-sl65.jpg
ECU Tune with 3 Inch Full Custom Exhaust and OEM Air boxes it dropped to 540s
ECU Tune, 3 Inch Full Exhaust and no air box 636
So we def figured out it was the air box causing the car to choke up so now we are making intakes and testing out different ones to see what works best
But heres the link to the with the dyno sheet from ECU tune compared to ECU/3 inch/no air box. The sheet has 634 but there was a run we missed that got 636.
https://mbworld.org/forums/attachmen...pipes-sl65.jpg
Super Member
Joined: Jul 2013
Posts: 930
Likes: 24
06 SL65AMG, 13 Tesla Model S 60kwh, 02 Jaguar S-Type 3.0, 12 S550 4 Matic, 07 E320 Bluetec, 06 LX470
93 Oct.
Yeah we were all shocked too. and trying to figure it out. But the moment you take out air boxes you can see the problem. It looks very big going in but when you look at the pipe that goes from the filter to the turbo you can see how the design of the pipe is very bad and its very narrow thus new intakes are needed.
Yeah we were all shocked too. and trying to figure it out. But the moment you take out air boxes you can see the problem. It looks very big going in but when you look at the pipe that goes from the filter to the turbo you can see how the design of the pipe is very bad and its very narrow thus new intakes are needed.
MBWorld Fanatic!
Joined: Mar 2009
Posts: 2,630
Likes: 9
From: Chicago
W215 V12TT Build by Speedriven, W221 S550 4Matic
I think your main problem is also on the Manifolds. You opened up your airflow on the back side but your airflow to go in is clogged up. Doing the scorpion intakes Speedriven has should solve the trick and bump the held up HP. I will be getting my Scorpions installed sometime this week or next week and will visit a dyno to check my numbers my mods are close to the same I just have a HE, Pump, and Rear Tank. I will do my numbers with 100oct also so if you can do 100 oct try that I wonder how both cars will compare on dyno. I do have smaller turbos than the 65 however so we will see.
MBWorld Fanatic!
Joined: Aug 2013
Posts: 1,077
Likes: 80
From: Anchorage
05 CL65
If I wasn't there for those dyno pulls and got those dyno sheets I wouldn't believe it either but I had easy 7 runs from 630-636 back to back when OEM air boxes were pulled out when I had my 3 inch exhaust in. If you pull out the air box you can see it gets really narrow when it goes down from the filters to the turbo. I was thinking about trying to cut and mod my OEM air box so it would have a much bigger hole from filter to turbo.
Also with your TB did you upgrade from the 600 to 65 TB or get something special? I got a spare 65 TB I was thinking about boring out even if its 2-4 more mm I'm curious what gains ill get even if it's a little
Also with your TB did you upgrade from the 600 to 65 TB or get something special? I got a spare 65 TB I was thinking about boring out even if its 2-4 more mm I'm curious what gains ill get even if it's a little
