LTH,which ones??
Former Vendor of MBWorld
Joined: May 2009
Posts: 2,305
Likes: 93
From: Valley of the Sun, Arizona
C63, SL55, E55, CLS55, ML63, C55
@ MBH, whipplem104, e55amgrocket. This is the information I have been wanting to discuss, thank you for your great information!!
So here is what I plan on doing to my beast:
180-185 pulley range
ported heads & cam (down the road when my warranty runs out)
90mm tb
custom intake
massive cooling mods
What are the thoughts on this setup with the 1 7/8 primarys and 3'' merge collector?
Here is what I have now:
MBH LT's with 1 5/8 primarys and a 2.5'' merge collector that flairs out to 3'' and a full 3'' exhaust with X-pipe, no cats. Here's my concern, I raced two different AMG's that had WAY MORE mods then I did and they both had custom LT's with 1 7/8 primarys and full 3'' merge collectors and I pulled on both of them (the cars had sat for a few hours and cooled equal time, so no heat soak excuses) several times on a highway runs from 30-140mph?!?! So now I don't know what to think, I do not want to spend money to step backwards... Should I just keep the system the way it is or do you all think I should go bigger based on what my future plans are??
So here is what I plan on doing to my beast:
180-185 pulley range
ported heads & cam (down the road when my warranty runs out)
90mm tb
custom intake
massive cooling mods
What are the thoughts on this setup with the 1 7/8 primarys and 3'' merge collector?
Here is what I have now:
MBH LT's with 1 5/8 primarys and a 2.5'' merge collector that flairs out to 3'' and a full 3'' exhaust with X-pipe, no cats. Here's my concern, I raced two different AMG's that had WAY MORE mods then I did and they both had custom LT's with 1 7/8 primarys and full 3'' merge collectors and I pulled on both of them (the cars had sat for a few hours and cooled equal time, so no heat soak excuses) several times on a highway runs from 30-140mph?!?! So now I don't know what to think, I do not want to spend money to step backwards... Should I just keep the system the way it is or do you all think I should go bigger based on what my future plans are??
Last edited by MBH motorsports; May 8, 2012 at 05:19 PM.
Member
Joined: Mar 2011
Posts: 193
Likes: 1
From: Orange County
Viper SRT-10, CLS 55 AMG, 2012 Tacoma Off Road 4x4
Wait, when did you start making your headers with the 1.7/8'' primarys?? When I ordered them from you I was discussing having you make a custom set for me with the larger 1.7/8'' primarys and you had said you would need time to R&D and fab to insure proper fitment, at that point I decided to save some $$ and go with that used set you had...
Former Vendor of MBWorld
Joined: May 2009
Posts: 2,305
Likes: 93
From: Valley of the Sun, Arizona
C63, SL55, E55, CLS55, ML63, C55
Wait, when did you start making your headers with the 1.7/8'' primarys?? When I ordered them from you I was discussing having you make a custom set for me with the larger 1.7/8'' primarys and you had said you would need time to R&D and fab to insure proper fitment, at that point I decided to save some $$ and go with that used set you had...
Member
Joined: Mar 2011
Posts: 193
Likes: 1
From: Orange County
Viper SRT-10, CLS 55 AMG, 2012 Tacoma Off Road 4x4
Let's go back to my original question and I'd love to hear everyone's input on this please.
So here is what I plan on doing to my beast:
180-185 pulley range
ported heads & cam (down the road when my warranty runs out)
90mm tb
custom intake
massive cooling mods
What are the thoughts on this setup with the 1 7/8 primarys and 3'' merge collector?
Here is what I have now:
MBH LT's with 1 3/4 primarys and a 2.5'' merge collector that flairs out to 3'' and a full 3'' exhaust with X-pipe, no cats. Here's my concern, I raced two different AMG's that had WAY MORE mods then I did and they both had custom LT's with 1 7/8 primarys and full 3'' merge collectors and I pulled on both of them (the cars had sat for a few hours and cooled equal time, so no heat soak excuses) several times on a highway runs from 30-140mph?!?! So now I don't know what to think, I do not want to spend money to step backwards... Should I just keep the system the way it is or do you all think I should go bigger based on what my future plans are??
Super Member
Joined: Oct 2008
Posts: 837
Likes: 25
From: seattle
1990 300ce supercharged and intercooled
I think what you are asking is about the 2.5" restriction at the merge collectors? This is actually a megaphone. It prevents reversion back into the primary. If done properly good and not bad.
MBWorld Fanatic!
Joined: Jan 2005
Posts: 4,276
Likes: 28
From: Bay Area
2015 E63S, 2018 E63S
Do you think that it's possible to make more power with a 90mm vs a 82mm? I think your current exhaust setup is fine. I don't think it's worth the $$ to find out either way.
Former Vendor of MBWorld
Joined: May 2009
Posts: 2,305
Likes: 93
From: Valley of the Sun, Arizona
C63, SL55, E55, CLS55, ML63, C55
There are other platforms that use 90's and they work out well. So IDK?
Without any real testing its hard to say one way or another. Personally I don't think 90mm is too big, but like I said I got no supporting data one way or another to know for sure.
MB World Stories
The Best of Mercedes & AMG
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know
Verdad Gallardo
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
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
Member
Joined: Mar 2011
Posts: 193
Likes: 1
From: Orange County
Viper SRT-10, CLS 55 AMG, 2012 Tacoma Off Road 4x4
The user Forestgump did the 90mm and it worked, I think he was just working out the kinks. I used to have a 4.6L Cobra with a ProCharger blower on it and when I did the ported 110mm TB it made crazy power!
MBWorld Fanatic!
Joined: Aug 2010
Posts: 2,156
Likes: 7
From: Northern Va
Dirt Scooters
I had a Cobra with a whipple and the crusher inlet with the 160mm tb. It looked like it could suck small kids in lol. I'm working on a 90mm right now for my new build also and might be able to get the 90mm up to around 95mm.
Member
Joined: Mar 2011
Posts: 193
Likes: 1
From: Orange County
Viper SRT-10, CLS 55 AMG, 2012 Tacoma Off Road 4x4
Again great info guys!! Thank You
Let's hear the input on the primary tube size:
MBH is using 1 3/4",
NPI is using 1 7/8",
TTM ARH is using 1.7/8",
BenzWorks is using 1.7/8"
This is why I'm digging at this, is it a fad with people thinking bigger is better, or is there some real data to show why all these fabricators are using the larger primaries?? If $$ is not a factor, which is ideal with for our modded 55's?
Let's hear the input on the primary tube size:
MBH is using 1 3/4",
NPI is using 1 7/8",
TTM ARH is using 1.7/8",
BenzWorks is using 1.7/8"
This is why I'm digging at this, is it a fad with people thinking bigger is better, or is there some real data to show why all these fabricators are using the larger primaries?? If $$ is not a factor, which is ideal with for our modded 55's?
Thread Starter
Super Member
Joined: Nov 2006
Posts: 809
Likes: 0
From: Miami,FL.
2017 Charger Hellcat
Again great info guys!! Thank You
Let's hear the input on the primary tube size:
MBH is using 1 3/4",
NPI is using 1 7/8",
TTM ARH is using 1.7/8",
BenzWorks is using 1.7/8"
This is why I'm digging at this, is it a fad with people thinking bigger is better, or is there some real data to show why all these fabricators are using the larger primaries?? If $$ is not a factor, which is ideal with for our modded 55's?
Let's hear the input on the primary tube size:
MBH is using 1 3/4",
NPI is using 1 7/8",
TTM ARH is using 1.7/8",
BenzWorks is using 1.7/8"
This is why I'm digging at this, is it a fad with people thinking bigger is better, or is there some real data to show why all these fabricators are using the larger primaries?? If $$ is not a factor, which is ideal with for our modded 55's?
MBWorld Fanatic!
Joined: Aug 2010
Posts: 2,156
Likes: 7
From: Northern Va
Dirt Scooters
Again great info guys!! Thank You
Let's hear the input on the primary tube size:
MBH is using 1 3/4",
NPI is using 1 7/8",
TTM ARH is using 1.7/8",
BenzWorks is using 1.7/8"
This is why I'm digging at this, is it a fad with people thinking bigger is better, or is there some real data to show why all these fabricators are using the larger primaries?? If $$ is not a factor, which is ideal with for our modded 55's?
Let's hear the input on the primary tube size:
MBH is using 1 3/4",
NPI is using 1 7/8",
TTM ARH is using 1.7/8",
BenzWorks is using 1.7/8"
This is why I'm digging at this, is it a fad with people thinking bigger is better, or is there some real data to show why all these fabricators are using the larger primaries?? If $$ is not a factor, which is ideal with for our modded 55's?
MBWorld Fanatic!
Joined: Jan 2009
Posts: 7,659
Likes: 68
From: Atlanta
2006 E55 AMG
Just run electric cutouts off the headers, like moir
For the record I have Floored Fab 1 5/8 with a 2.5" collector and mid pipe, and I am making 711rwtq.
For the record I have Floored Fab 1 5/8 with a 2.5" collector and mid pipe, and I am making 711rwtq.
Last edited by chawkins2001; May 9, 2012 at 04:24 PM.
MBWorld Fanatic!
Joined: Aug 2010
Posts: 2,156
Likes: 7
From: Northern Va
Dirt Scooters
As we all know know torque is what gets the car going. We just need to find the trade off in power and torque.
MBWorld Fanatic!
Joined: Dec 2006
Posts: 1,124
Likes: 32
From: Florida-Germany-New York
2004 E55,1969 300SEL6.3,2011 ML350 BlueTec Diesel,2005 ML400 CDI
I've been doing a lot of research for my headers also for my new build and there's a equation some guy came up with that you put all your info in and it tells you exactly what you need based on that and what your after and best of all it's dyno proven to work. With my new build I would need 1 7/8 primary and that's with more displacement,possibly more compression, real custom cams and it will be built for nitrous so the 619hp I was making will be nothing to what it will make after this. Lenth and collector size has a lot to do with overall power also. A big collector isn't always the best thing because you want to keep velocity up and the big collectors let the air cool faster slowing it down. For example a 358CI NASCAR engine makes 900hp and uses 1 7/8" into 2" that goes into a tri y megaphone that is usually 2.5" to 2.75" then opens up to 3"-3.5". Those cars live above 8000rpm and still use small collectors to keep exhaust flow up. Step headers seem to be the best solution to keep velocity high while flowing a lot also. I'll keep everyone posted on what I make with the custom headers I'm going to do.
MBWorld Fanatic!
Joined: Jun 2009
Posts: 1,693
Likes: 9
From: Houston, TX
2006 E55, 2012 Jeep SRT, 2008 G37s 6MT (The Mrs.), 2005 Explorer
Since we're posting formula car headers. Saw these at MSR Houston. There's not a lot of reference for size but they're atleast 2". Glorious looking piece. Doesn't apply to us as they're for a small displacement, NA, high reving engine and we're the opposite of that. Cool to look at none the less.
MBWorld Fanatic!
Joined: Dec 2006
Posts: 1,124
Likes: 32
From: Florida-Germany-New York
2004 E55,1969 300SEL6.3,2011 ML350 BlueTec Diesel,2005 ML400 CDI
True, however, the point is that the multiple increases in tube diameter and then the final reduction at the collector is applicable to any engine. The overall lengths are primarily determined (as you correctly imply) in relationship to the RPM and rarefaction pulse.
I spoke to Mike at MBH about this last year asI thought he might have been incorporating this technique from one of the photos I saw of he gorgeous headers.
I spoke to Mike at MBH about this last year asI thought he might have been incorporating this technique from one of the photos I saw of he gorgeous headers.
