95 SL500, K&N, NEOKEN Ported TB, Custom Intake, RENNtech Sport Exhaust, AMG I Monoblocks
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The Workshop MB: RENNtech SL Class
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95 sl500, AMG - F/R Brakes, Exhaust, Wheels. RennTech - ECU, CF Airbox. H&R Sport Springs. K&N
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not worth the money. no real gains. Not tested by me but others.
there is a place in Or that has or had them last time i checked. i will dig up the info if u really want to spend the money.
there is a place in Or that has or had them last time i checked. i will dig up the info if u really want to spend the money.
they come up on ebay like once a year for around $600 used
I come from the American car side where there was power to be found realatively easy in a lot of factory cars (getting less so these days without boost). I have read all the threads here and have not found any real power gains without major engine work. 10HP on a 4000LB car is just not worth messing around with.
95 SL500, K&N, NEOKEN Ported TB, Custom Intake, RENNtech Sport Exhaust, AMG I Monoblocks
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11,008 Posts
Looking forward to it Jonathan, keep up the good work as always! :thumbsup:
MB SL600, MB 380SE, Suzuki Grand Vitara, 38' Chris-Craft, Volvo V70XC, and my own two feet...
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4,129 Posts
What do you want for your M120 exhaust? I saw you mention you had one in another thread. What do the tip(s) look like?
Also, I have been thinking about trying M104 3.6 AMG cams in my car. I see no reason why they won't work, and should produce decent power gains. They aren't that rare, I should be able to find some.
Thoughts?
Thanks ya'll....it should be an interesting project. Solid lifters and serious cams do a Nice job of waking things up
As for the exhaust, what I have it down pipes to about mid-ship. It has two high flow magnaflow cats installed along w/ provisions for up and downstream O2 sensors.
Muffler/tips etc would be up to you!
Jonathan
As for the exhaust, what I have it down pipes to about mid-ship. It has two high flow magnaflow cats installed along w/ provisions for up and downstream O2 sensors.
Muffler/tips etc would be up to you!
Jonathan
MB SL600, MB 380SE, Suzuki Grand Vitara, 38' Chris-Craft, Volvo V70XC, and my own two feet...
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4,129 Posts
What are everyone's thoughts on using AMG 104 3.6 cams in an M120?
MB SL600, MB 380SE, Suzuki Grand Vitara, 38' Chris-Craft, Volvo V70XC, and my own two feet...
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Yeah, I know the cams are different, that's the whole point! The AMG cams are more aggressive, which is why I want them in the first place. I'm 99% sure they'd be straight drop-in replacements for the originals, as each half of an M120 is pretty much an M104.
About intake constriction, do you think there'd be much? The stock M120 intake manifold is already pretty well designed, and has never been known as a constriction point. Even when RT and Brabus did their conversions, they left that alone. Well, except for painting the exterior of it black. The intake constriction is really at those tiny breather boxes, not at the manifold. Renntech does make a fix for those, but $$$$$$$$$$$$$$
About the tune, that's not a problem. I already had the car tuned once, and they'll do a retune for whatever mods I add later at a reduced rate. Gained roughly 30rwhp, with everything else stock. Been dreaming about a set of AMG 3.6 cams, and the RT airboxes. About a P&P job, I do have a guy on here who does that kind of work, and has been itching to do my heads and intake manifolds for awhile now, but I'm really guessing the biggest gains would be the cams and better airboxes, before I go that far.
I mean, if you forget about the suspension upgrades etc., and just look at the motor, this is pretty much what AMG did to the M104 to get an extra 50hp out of it, they added a bigger intake, exhaust, more aggressive cams, and tuning. I'd just being doing the same thing X2 on an M120.
1997 SL600 Brilliant Silver Sport with grey/dark metal interior, 234K miles
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1,975 Posts
Chris,
When AMG, Brabus, RennTech, etc. produced their versions of the V12 (120 engine), didn't they use "their" cams and not MB's? If they did, these cams would be more likely to have fewer problems than the AMG C36's and you could probably get them in a kit.
Also, if I was seriously going down the cam/head mod road and it depended on the airbox upgrade (I still can't believe MB and those silly little intakes), I'd get the airbox upgrade first.
Michael
When AMG, Brabus, RennTech, etc. produced their versions of the V12 (120 engine), didn't they use "their" cams and not MB's? If they did, these cams would be more likely to have fewer problems than the AMG C36's and you could probably get them in a kit.
Also, if I was seriously going down the cam/head mod road and it depended on the airbox upgrade (I still can't believe MB and those silly little intakes), I'd get the airbox upgrade first.
Michael
Yes, I know you know..my comment was simply that it's not an intake and exhaust cam, but simply one for each 3.6 2/M120.
When I mentioned porting, I was talking the heads as the 3.6 heads are ported in comparison to a stock M104. And to utilize the greater lift/duration you'll want to be moving air more efficiently, thus my thoughts to P&P if you Really wanted to get every last bit out of them.
Now if you Really want to get serious, converting to a solid lifter arrangement could likely be done but it would be $$$$$, however it would net a good bit more top end HP/torque.
As an aside, I do have a set of SL600 RENNtech air boxes available, drop me an email should you be interested.
I also have a C36 sitting here, so if you wanted to consider re-profiling your cams we could like grind something very similar, if not a bit more aggressive then what the 36 ran.
Getting cams from one of the aforementioned tuners is going to be BIG $$$$, and that's if they even have any left..M120 is old new as far as they are concerned
Jono
When I mentioned porting, I was talking the heads as the 3.6 heads are ported in comparison to a stock M104. And to utilize the greater lift/duration you'll want to be moving air more efficiently, thus my thoughts to P&P if you Really wanted to get every last bit out of them.
Now if you Really want to get serious, converting to a solid lifter arrangement could likely be done but it would be $$$$$, however it would net a good bit more top end HP/torque.
As an aside, I do have a set of SL600 RENNtech air boxes available, drop me an email should you be interested.
I also have a C36 sitting here, so if you wanted to consider re-profiling your cams we could like grind something very similar, if not a bit more aggressive then what the 36 ran.
Getting cams from one of the aforementioned tuners is going to be BIG $$$$, and that's if they even have any left..M120 is old new as far as they are concerned
Jono
To be honest... none at all
. I'd never touch a perfectly running M120 with a spare part sticker price of $35-45'000. What are your expectations from this mod? Faster 0-60 mph time? How much faster? 0.2-0.3 seconds? 4 mph more top speed?IMHO such (realistic - if at all) numbers are by far not worth the effort. An R129 was always a heavy 4000+lbs cruiser and will never be a race car. If power is really an issue I'd rather search for an all original SL73, Brabus 7.2 or upgrade for an R230 SL55/63/65.
Lance
Well, you can find used M120 long blocks for about 2-3K w/ reasonably low mileage these days, so based on that, cost of catastrophic failure is more labour then parts;-)
That aside, it's fun to play w/ what one has...people think I'm Crazy for taking a 4000lb 560SEC on track, but @ the same time they are impressed w/ just how transformed the car is from what they remember from theirs or their expectations.
OT, but do you own a Lancair? They make a Wonderful bit of kit!
Jonathan
That aside, it's fun to play w/ what one has...people think I'm Crazy for taking a 4000lb 560SEC on track, but @ the same time they are impressed w/ just how transformed the car is from what they remember from theirs or their expectations.
OT, but do you own a Lancair? They make a Wonderful bit of kit!
Jonathan
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