stallion8797

We just finished up a set of V6 heads and since the ports and combustion chambers are virtually identical, I figured I'd share the results:

Here are the flow numbers:

Stock:

.100" I:88.7 E:65.7
.200" I:167.5 E:118.6
.300" I:218.2 E:159.4
.400" I:217.8 E:177.6
.500" I:224.8 E:184.3

Modified:

.100" I:101.1 E:71.6
.200" I:195.3 E:117.8
.300" I:256.9 E:164.0
.400" I:296.0 E:192.3
.500" I:318.9 E:199.1

Gains:

.100" I:12.4 E:5.9
.200" I:27.8 E:-.8
.300" I:38.7 E:4.6
.400" I:78.2 E:14.7
.500" I:94.1 E:14.8

hooleyboy

I see head porting becoming the "new" mod around these parts. People are seeming to be reaching the limits of the 55... I know for sure I will be doing it.

Exotic-metal55

My heads are being worked on right now but our local famous porters are backed up 5 months! 8 months behind on this project already..

Heads should net us the largest gains yet, since not much room for real cams..

Thanks for posting the results! Nice work and good gains!

stallion8797

The best thing is that those numbers are with stock valves. We will have numbers on an enlarged valve head in a few months.

Anyone know what the VRP heads were flowing?

chiromikey

maybe now we'll have a use for those 190mm pulleys...

chiromikey

i don't recall what flowbench gains the people that have done this have claimed but i've yet to hear of anyone making real world power once assembled. (there's no opinion here, i'm just reporting)

Exotic-metal55

Same thing I have noticed from the 2-3 people that have ported heads..

Being that our engines are boost enhanced, hitting the magic velocity number is going to take the right key to open the door. I alot of engines formats that just start being ported for the first time, can show poor results. At least until the right porter figures out the combination of flow verses shear velocity efficiency..

Some porters will post high flow numbers (flow makes sales) but net poor hp gains. Others may have less flow but more velocity and show huge gains. The porters we have in Houston, have my confidence to get good gains..

RenntechE55

Well I will have a extra set of head sitting around , to bad this engine swap is costing a lot of $. I would try and find a place in PHX that could do this. Has anyone seen actual dyno gains with this mod?

stallion8797

This is our fourth set of heads, so I'm confident in these. We've been through the trial and error part already. Only the dyno and track will truly tell though.

slownrusty

Well stated and very true...that is where the power is made.

chiromikey

absolutely agree that it's more about velocity than overall flow. some day maybe we'll see it done right. hopefully i still have the car by then...

blackbenzz

+1! If I recall correctly jakpro had his ported and I dont remember any significant gains. Also, member Bleek had his ported and said he did see good gains Last time I checked it was going for about $5k for this work and I wouldn't dump that kind of money on something I wasn't sure of gains. Are the AMG heads the same as non AMG heads with some port/polish work?

Havoc

Nope, the heads will still be different.

stallion8797

The M112 and M112K heads are identicalm not sure on the M113/M113k, but I really can't see where a change could be made that couldn't be duplicated with porting.

Our goal for these heads was to maintain max velocity, while still improving flow. I'll post the pics of the stock and ported ones soon, and you can see that there is a ton of material left to be taken out, but just didn't seem necessary given our past experience with these.

Exotic-metal55

You can get heads ported by reputable shops/porters for under 2K. If you start changing valves out,, then it can get pretty crazy. The larger valve debate has been endless on this forum. I plan to stick with stock valves so far but may change if potential power/$ ratio is there.

blackbenzz

Where are you getting is info from?
Yea I think so too.

Cant wait for pics/results!
Really? I guess I got the MB rapage price! Let me know how your project goes, this has always been on my list of things to do but I just cant justify dropping the mone on it right now. I will live vicariously through others for now lol

Havoc

I had ported 500 series non-AMG heads and ported 55K AMG heads and I saw the differences between them through pictures. The main difference between the two is that the AMG head is stronger because of extra material in their castings and they can dissipate heat better through the difference in water passages. The runners are also slightly different and if both heads are ported there will still be a slight difference. Bleek confirmed this as well. I'm not sure if there are differences with the sparkplug and valve angles between the two, but this should be looked into. I also don't know how your 55 non-AMG heads differ from the 500 series non-AMG heads and the 55k AMG heads.

blackbenzz

Ok thanks.

FYI- they never made a non AMG 55, that includes my CLK55

Havoc

Oh right, you have the earlier casting 55 AMG heads. I ment non-K heads. I'm not sure if there is a difference between the two.

I think it would be in your best interest to port your own heads and not to buy non-AMG heads and port them, if that's what you were thinking.

Dude, you have so many mods that I truely believe you'll see gains from porting your heads. But I understand that you would like to see proof in porting before you make that decision. The problem is that your set up is unique and unless someone with your exact set up ports their heads and test them you may never really know.

Just do it!!!

blackbenzz

I agree about porting the heads currently on my car. I was just wondering because last time I looked at them it looke dlike it had a port/polish job and I was assuming AMG used the non AMG heads and modified them

I would like to do this but I am currently in the process of purchasing a new property and dont have the spending money to do it. Nor do I know who to trust with a project like this. There are a couple things I have on the list before I get to the head porting. It may be a while lol. Thanks for your help/input

JamE55

Was going to do this with Cory a long time ago and from what he said the price to P&P this may out weigh the HP outcome.

stallion8797

Our V6 heads run 1500.00 for P&P, valve job, and shaving a few thousandths off the bottom for a slight boost in compression (N/A). We reuse your springs and valves but replace the seals.

We can do the V8s for 2000.00 including the above services.

We looked into larger valves and titanium retainers and its a bit pricey unless a large amount are ordered. For 99% of the cars a stock valved ported head will be more then enough.

blackbenzz

That is also what I was told
Not bad. Looking forward to your real world results I wouldn't want my compression raised though since mine is already at 10.5:1