Ported and Thermal Barrier coated C55 Manifold
Hope that helps.
~AMS~
I just think that this would be much more hp/$$ effective than a BBTB which is ridiculous for the amount of money per horsepower.
I just wish you guys were located here near seattle so I would have minimal downtime for shipping and installation!
Regarding the TB, I bought one from Potomac, pretty cheap and then ship it out to have it bored, let's wait to see if mine will work.
Ohh -- I bought the black plastic rear diffuser sold by Teo on this forum. Fits perfect looks great, just wish it was CF but, that wasn't available when I was buying.
Last edited by Tump43; May 31, 2010 at 12:03 AM.

Please keep this thread alive! I'm highly interested in the results and product.
The Best of Mercedes & AMG
Sounds good, then torque loss should be minimal (although there still may be some slightly). I agree, going too extreme would not be the wise route.
Every car ive ever put a short runner manifold on has lost considerable low end torque (but made up for it up top). Manifold design, shape and runner length and shape are a mind numbingly complicated science....
I wonder if later 55 AMG V8s had these removed get the extra factory claims or if they are still in place on all 55 AMG models (TVT can you confirm?).
No doubt cleaning and smoothing the runners (especially near where they enter the heads) as well as the thermal coatings should show some gains but I'm still not 100% convinced on shortening the runners unless you went totally extreme for top end only like speedybenz did.
Sorry if i missed this, i just skimmed through for the cliff notes....
Either way, it nice to see people doing things to these motors. i just got back into the marque when i bought my C32 today. last time i owned a benz (a clk430) there was basically nothing to speak of in the way of NA mods and no one was really working on much...
Dyno chart would be interesting to see next to a pre mani one to see how the power band changed and where the gain comes in......
With a typical ling runner manifold design you are looking at 18-20" tops. MB decides to use some of the longest runners in the industry, even for the AMG cars and the new DOHC engines. The short runner path is still "long" at roughly 14". Usual short runner manifolds are under 8", usually closer to 6". The loss of 2" of runner length really just makes the change over point more noticeable. You will not see a large loss of low RPM power in exchange for a massive amount of HP, the runners are still far too long and the change isn't significant enough.
We've done one manifold in which we removed the entire bottom set of runners and flaps and left just the top induction points. That manifold was a Top End only manifold. The runners were right aroung 8" and once you got the motor over 3K it screamed to red line. For a track motor, this is the way to go!
On the M113K/M112k you can port the intake manifolds and runners and see more power as well and much better throttle response. On a SRT6 we did these with supporting mods and it dynoed 10RWHP less then a stock CLK63!
I decided to heat 2 manifolds up and watch the temp decrease over time. I also looked at the temp on the inside of the manifold, as that is what will best mimic air temp.
The coated manifold was baked up to a temp of 265 and the uncoated manifold was 227. I wanted to get them equal, but the size of my oven required one to go on one shelf and the other to sit on a shelf below it. The most important thing is delta.
Coated:
Out of Oven: 265
5 mins of cooling: 160
10 mins of cooling: 135 Air temp 150
15 mins of cooling: 119 Air temp 124
20 mins of cooling: 104.4 Air temp 107
Uncoated:
Out of Oven: 227
5 mins of cooling: 136
10 mins of cooling: 118 Air temp 143
15 mins of cooling: 107 Air temp 121
20 mins of cooling: 96 Air temp 106
It's interesting to note that the coated manifold dispels more heat per minute passed and that it keeps the intake air cooler then the uncoated manifold when compared to surface temp.
Hope everyone finds it as interesting as I do!
Another way to do this would be to measure the temp of the mani over time with a constant heat source aimed at the bottom of the mani (where your coating is)...... if the coating is repelling heat it'll heat up slower.... I suspect over time they'd both be the same temp... it all get's more complicated with air flowing through it...... you could do that also blow some air through it at the same time.
You've got a few sources of heat here: conduction through the metal to metal of the manifold mounts to the heads, convection through the air inside the manifold (cooling) and outside the manifold (heating), and radiation from below the mani from the engine to the intake mani.
Your coating below the mani is prob aimed at the radiation/convection from the engine to the intake mani bottom.
Phenolic spacers will help with the conductive heat transfer from the heads up to the intake mani.... this is a LARGE source of heat......
http://en.wikipedia.org/wiki/Heat_transfer
Coated:
Out of Oven: 265
5 mins of cooling: 160 {105DEG IN 5 MIN OR 21DEG/MIN}
10 mins of cooling: 135 Air temp 150
15 mins of cooling: 119 Air temp 124
20 mins of cooling: 104.4 Air temp 107
Uncoated:
Out of Oven: 227
5 mins of cooling: 136 {91DEG IN 5MIN OR 18.2DEG/MIN}
10 mins of cooling: 118 Air temp 143
15 mins of cooling: 107 Air temp 121
20 mins of cooling: 96 Air temp 106



