Porting, Polishing, and Cams project
Thread Starter
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Joined: Aug 2006
Posts: 4,909
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From: Houston
C63S
I have to say that I wouldn't have bothered porting the heads. AMG did a fantastic job on them and there isn't much room for improvement.
However, the 3 angle valve job is something that I would have done again. I think that porting the exhaust side of the heads would also help.
My issue is that there is no feasible way for me to up the boost anymore. My S/C is almost spinning at redline.... so to be safe, I need to leave things alone.
I have a dyno appt on Friday where I should be able to get some Dynapak numbers to compare with my first graph. I expect the numbers to be the same as before the port job.
I consider this project over.....and a failure.
The only positive thing is the Trq curve and improved MPG. We will be able to compare the two graphs this weekend.
Last edited by sales@eurocharged.com; Aug 20, 2007 at 08:42 AM.
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Joined: Nov 2001
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From: OC
C32
I hope you don't plan on removing the clutch, also with a smaller SC pulley there is a good chance the belt will slip. Let us know how it turns out.
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Joined: Jan 2007
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From: San Diego
MB
I have been thinking about this since I first bought my car. When I spoke to a rep at STS he sounded totally excited about my inquiry. He was thinking a modest horspower level per pound of boost would be in the neighborhood of 20HP per lbs of boost. The C32 without boost was dynoed at 135WHP. I see the math looking something like this, 135 + 17% (drive train loss) = 158 Flywheel HP(Base). The boost on the M112 engine is 14.5 so 20 x 14.5 = 290HP + 158(Base) = 448 horsepower, that is a 100HP increase @ the same boost! A pullied blower is good for approx 4-5 more pounds of boost so 18.5 x 20 = 370 + 158(Base) = 530 Flywheel HP!
So far I believe the most challenging part of the build would be the electronics side. And what I mean by that is where the ECU controls the supercharger clutch. I figure there has got to be a way to have that talk to an electronic boost controller to open and close the wastegate in a similar fashion to the supercharger clutch.
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Joined: Aug 2006
Posts: 4,909
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From: Houston
C63S
I've been reading a post on the E55 forum where there're in talks about installing turbochargers. Some want to keep the factory supercharger while others want to nix the blower all together.
I have been thinking about this since I first bought my car. When I spoke to a rep at STS he sounded totally excited about my inquiry. He was thinking a modest horspower level per pound of boost would be in the neighborhood of 20HP per lbs of boost. The C32 without boost was dynoed at 135WHP. I see the math looking something like this, 135 + 17% (drive train loss) = 158 Flywheel HP(Base). The boost on the M112 engine is 14.5 so 20 x 14.5 = 290HP + 158(Base) = 448 horsepower, that is a 100HP increase @ the same boost! A pullied blower is good for approx 4-5 more pounds of boost so 18.5 x 20 = 370 + 158(Base) = 530 Flywheel HP!
So far I believe the most challenging part of the build would be the electronics side. And what I mean by that is where the ECU controls the supercharger clutch. I figure there has got to be a way to have that talk to an electronic boost controller to open and close the wastegate in a similar fashion to the supercharger clutch.
I have been thinking about this since I first bought my car. When I spoke to a rep at STS he sounded totally excited about my inquiry. He was thinking a modest horspower level per pound of boost would be in the neighborhood of 20HP per lbs of boost. The C32 without boost was dynoed at 135WHP. I see the math looking something like this, 135 + 17% (drive train loss) = 158 Flywheel HP(Base). The boost on the M112 engine is 14.5 so 20 x 14.5 = 290HP + 158(Base) = 448 horsepower, that is a 100HP increase @ the same boost! A pullied blower is good for approx 4-5 more pounds of boost so 18.5 x 20 = 370 + 158(Base) = 530 Flywheel HP!
So far I believe the most challenging part of the build would be the electronics side. And what I mean by that is where the ECU controls the supercharger clutch. I figure there has got to be a way to have that talk to an electronic boost controller to open and close the wastegate in a similar fashion to the supercharger clutch.
I doubt I will spend any more money on mods for this car. My goal now is to find out why the car is pulling timing. It starts at 4800 RPM and continues to red line. I think that I'm losing about 50HP and I have no clue why!
I recently replaced my O2 sensors, but I've tripped the P0130 code twice now.
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Joined: Oct 2006
Posts: 464
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From: Miami, FL
02 C32 AMG sold!
many officers patrolling the area that I try my car out on.
Which Carchip version do you have? I have CarChip Pro 08226
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Joined: Aug 2006
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From: Houston
C63S
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Joined: Feb 2006
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LET C32 2002
Don't forget that the base number will go up once the S/C is removed and there are no air restrictions. With the S/C not spinning, air has a hard time getting through.
I doubt I will spend any more money on mods for this car. My goal now is to find out why the car is pulling timing. It starts at 4800 RPM and continues to red line. I think that I'm losing about 50HP and I have no clue why!
I recently replaced my O2 sensors, but I've tripped the P0130 code twice now.
I doubt I will spend any more money on mods for this car. My goal now is to find out why the car is pulling timing. It starts at 4800 RPM and continues to red line. I think that I'm losing about 50HP and I have no clue why!
I recently replaced my O2 sensors, but I've tripped the P0130 code twice now.
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Joined: Mar 2006
Posts: 2,517
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From: Ohio
...
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Joined: Jun 2007
Posts: 2,949
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From: Philadelphia, PA
2008 A8L, 2002 996TT X50, 2009 X5
ASP, Evosport and Renntech are all the same size... 178mm
Leading Edge is 185mm...you should see the difference first hand, the Leading Edge Pulley is huge compared to the others...
i agree, cooling upgrades are necessary to see the full gain from this setup...
if anyone is interested in some cooling upgrades, shoot me a PM...
Leading Edge is 185mm...you should see the difference first hand, the Leading Edge Pulley is huge compared to the others...
i agree, cooling upgrades are necessary to see the full gain from this setup...
if anyone is interested in some cooling upgrades, shoot me a PM...
The question's come up a few times regarding pricing and availability - Erick or Jerry, any info or updates on this?
TIA!
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Joined: Jan 2007
Posts: 617
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From: San Diego
MB
A google search of Leading Edge Motorsports comes back with a few companies... from my best guess, the most likely one to be correct is http://www.leadingedgemotorsport.com...port/index.cfm...
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Joined: Jul 2004
Posts: 1,194
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From: Diamond Bar & Anaheim, CA
2003 C-Class Sportcoupe
I just ordered the LET C32 Pulley. Keep us posted on the progress. I'm probably going to do a baseline dyno, then put on the ASP pulley, then the LET pulley. Now I can use my boost gauge and do some actual tuning....
Supercharged cars are so much more difficult to change boost, gotta change pullies, unlike turbos.
Supercharged cars are so much more difficult to change boost, gotta change pullies, unlike turbos.
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Joined: Mar 2006
Posts: 2,517
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From: Ohio
...
dyno'd the car today, it put down 322 whp with its current configuration.
i am in the process right now of putting the LET Motorsports Pulley on the car...
i have another dyno scheduled for friday afternoon, so i should have some numbers then...i will keep you posted
i am in the process right now of putting the LET Motorsports Pulley on the car...
i have another dyno scheduled for friday afternoon, so i should have some numbers then...i will keep you posted
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From: Boston
2004 C32 ///AMG
what engine mods put you at 322 RWHP?
MBWorld Fanatic!
Joined: Mar 2006
Posts: 6,665
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From: Boston
2004 C32 ///AMG
thanks...didn't see that 
-RENNtech Stage 1 (Pulley & ECU)
-Full SL55 Intake w/Green Filters
-Magnecor 8.5mm Plug Wires + Iridium IK22 Plugs
-Lightning Intercooler Pump, Cobra Dual-Pass Heat Exchanger, Canton Intercooler Reservoir, Custom Intercooler
-Evosport Phenolic Intake Spacers
-Sprintbooster
322 @ the rear wheels seems low. hope the LET Pulley makes over 360...
-RENNtech Stage 1 (Pulley & ECU)
-Full SL55 Intake w/Green Filters
-Magnecor 8.5mm Plug Wires + Iridium IK22 Plugs
-Lightning Intercooler Pump, Cobra Dual-Pass Heat Exchanger, Canton Intercooler Reservoir, Custom Intercooler
-Evosport Phenolic Intake Spacers
-Sprintbooster
322 @ the rear wheels seems low. hope the LET Pulley makes over 360...
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Joined: Jun 2007
Posts: 2,949
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From: Philadelphia, PA
2008 A8L, 2002 996TT X50, 2009 X5
From what I've read on other posts, driveline losses for this car are approx. 15-17%.
322 / .85 = 378
322 / .83 = 388
Renntech Stage I alone is claimed to make a hair under 400 hp... so either that's an inflated figure, or they experienced those gains by starting with a particularly strong stock C32, who knows.
Anyway, I think 360 rwhp (ballpark 425 - 435 crank hp) is optimistic for just the LET pulley swap, although I'd be happy to be wrong
almost 40 rwhp from a slightly larger (i.e. higher boosting) pulley seems unlikely to me though.Maybe with the LET pulley AND upgraded headers, we'll see 350+ rwhp out of 1Fast's car!!
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Joined: Mar 2006
Posts: 2,517
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From: Ohio
...
+1
From what I've read on other posts, driveline losses for this car are approx. 15-17%.
322 / .85 = 378
322 / .83 = 388
Renntech Stage I alone is claimed to make a hair under 400 hp... so either that's an inflated figure, or they experienced those gains by starting with a particularly strong stock C32, who knows.
Anyway, I think 360 rwhp (ballpark 425 - 435 crank hp) is optimistic for just the LET pulley swap, although I'd be happy to be wrong almost 40 rwhp from a slightly larger (i.e. higher boosting) pulley seems unlikely to me though.
Maybe with the LET pulley AND upgraded headers, we'll see 350+ rwhp out of 1Fast's car!!
From what I've read on other posts, driveline losses for this car are approx. 15-17%.
322 / .85 = 378
322 / .83 = 388
Renntech Stage I alone is claimed to make a hair under 400 hp... so either that's an inflated figure, or they experienced those gains by starting with a particularly strong stock C32, who knows.
Anyway, I think 360 rwhp (ballpark 425 - 435 crank hp) is optimistic for just the LET pulley swap, although I'd be happy to be wrong
almost 40 rwhp from a slightly larger (i.e. higher boosting) pulley seems unlikely to me though.Maybe with the LET pulley AND upgraded headers, we'll see 350+ rwhp out of 1Fast's car!!
anyways, i got the new pulley on last night, but i haven't had a chance to drive the car yet...i will let you know how it drives and especially what kind of power it puts down on friday...
Senior Member
Joined: Oct 2006
Posts: 464
Likes: 0
From: Miami, FL
02 C32 AMG sold!
let this be a word of wise to you boys and girls, before putting
box of parts in your C32, go and DYNO your car while it's stock,
get a baseline reading. I regret not doing this.
I'm a nerve away of putting my car back to stock to dyno it or
just strip it and sell it.
box of parts in your C32, go and DYNO your car while it's stock,
get a baseline reading. I regret not doing this.
I'm a nerve away of putting my car back to stock to dyno it or
just strip it and sell it.
Senior Member
Joined: Oct 2006
Posts: 464
Likes: 0
From: Miami, FL
02 C32 AMG sold!
thanks...didn't see that
-RENNtech Stage 1 (Pulley & ECU)
-Full SL55 Intake w/Green Filters
-Magnecor 8.5mm Plug Wires + Iridium IK22 Plugs
-Lightning Intercooler Pump, Cobra Dual-Pass Heat Exchanger, Canton Intercooler Reservoir, Custom Intercooler
-Evosport Phenolic Intake Spacers
-Sprintbooster
322 @ the rear wheels seems low. hope the LET Pulley makes over 360...
-RENNtech Stage 1 (Pulley & ECU)
-Full SL55 Intake w/Green Filters
-Magnecor 8.5mm Plug Wires + Iridium IK22 Plugs
-Lightning Intercooler Pump, Cobra Dual-Pass Heat Exchanger, Canton Intercooler Reservoir, Custom Intercooler
-Evosport Phenolic Intake Spacers
-Sprintbooster
322 @ the rear wheels seems low. hope the LET Pulley makes over 360...
comes up to 389BHP
