Start with the easy stuff, first do compression test, if good, do cams, chain. dial in cam gears.think about those 3.27 gears in the back they will slow you down at the initial take-off, basic hot-rod stuff.
It's all money and compromises.

Put a megasquirt on the car, rebuild the exhaust and change the intake throttle butterfly unit from the 60mm it is to something like 70-80mm and change the air intake setup to something matching the 80mm with cold air induction. Will get you well over the 200hp, prob close to 250.

Also will be able to run much leaner cruising if you do spark control with the megasquirt, atm my car is averaging about 12L/100km in CITY driving and i have a lead foot.

Can you please explain the expression "megasquirt" to a foreigner.....

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1974 MB 230 4 cyl auto Sold
1973 MB 280SE #12004
1970 MB 230/8 #53280
1970 MB 300SEL 6.3 #4509 sold
1968 MB 300SEL 6.3 #0335
1972 MB 280SE 4.5 75k miles sold
1971 MB 230/8 60k miles sold
1972 Volvo 142 60k miles sold
1969 Opel Rekord 1900 sold
1974 L508D Camper

Megasquirt is a DIY EFI system much like haltech etc. Fully mapable fuel supply and spark tables with as many extra features as the mainstream computers. But its about $400-500 prebuilt, less if you buy a kit. vrs $1500+

All you have to replace is the injectors(second hand ford injectors, I didnt build a new fuel rail, got the injectors turned down on a lath to fit the hoses onto them like stock), fuel pressure regulator(from same source), install a O2 sensor(LC1 wideband sensor, $200max) and if doing spark figure out how to do the ignition system(easiest option ford EDIS V8 about $200 from a wrecker, i used direct control spark due to not having EDIS8 systems in Aus, costs about the same) Ohh and a hell of lot of rewiring but very easy to do

http://www.benzworld.org/forums/vintage-mercedes-benz/1318045-replacing-bosch-jetronic-megasquirt-efi.html has some information, a user called Oughtsix of that forum has a really nice website showing what he did.

yeah, I've lookied into the Megasquirt thing, and that's way too involved for me..don't they provide a pre-built unit like plug'n'play kinda stuff?

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RIP: 80 300SD
RIP: 79 450SEL
2002 E430 4matic (212,000km)
2002 ML500 'sport'

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FACEBOOK: PANZER450

Drop a small block chevy in it if you want cheap power.
For even cheaper power, sell it and buy a 560SEL.
If you want to go cheaper then that and get even more power, get an 80 something BMW 750i. They are as cheap as chips right now (which is so tempting it's scary) and should have plenty of oomph.

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With best regards

Al

I have one, don't get a cheap V12 car. Spend the time and find one with records like I did and make sure it was kept up with over the years. Well I guess that holds true with any car. They are terrible money pits if buying a cheap one and will consume you mostly with labor out the ass... parts aren't too bad. Tons of jobs overlap too... like intake manifold gasket seals, valve cover gaskets, timing chain tensioner, upper t-case seal, etc.

It holds 4.25lbs of R12.



Even quicker are the ECE (grey market) E23 745i-Turbo cars... I6 turbo. The 84+ are best and are a lowly 6psi in stock form, stock turbo is good to about 13psi and can make an honest 300rwhp then @ 3550lbs curb weight

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

Yep, when I lived in Jordan in 1993, a fellow i knew had a 5 speed 745i. It looked like one hell of a car.

I've never had a v12. I've heard that all v12's are money pits but the beemer sounds like a deal. Like most old cars (to my dismay) the price difference between a well kept version and a roaches nest isn't much.

__________________
With best regards

Al

If you're up in DFW again, some dude on CL has been half-assed trying to sell an '85 745i for $1k. Looks decent, needs a passenger fender and a trans... guy in AZ remans them and fixes ALL of its internal quirks for about $900 + ship. Car is worth $500 tops to me, I can get you his email if you want it.

Lots came through Houston's port in the 80s, two of mine did... the '84 came through with someone from the Department of Defense and he brought it to Tennessee. Then ended up in Tyler, Texas and now in my hands.



I'd have to check my sales invoice but I think I paid about $3500 OTD. Guess I've owned for three years, last dealer invoice I have for it was just shy of $6000! I have nearly 20 pages of them.

Reman LAD pump, reman gear box, upper oil pan gasket, intake manifold gaskets, some pressure hose, some other stuff I can't think of at the moment on that invoice.

The car hasn't stranded me, no major issues, and gets 21mpg @ 70mph.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

I remember seeing that car. It was very clean.

Sure send me the info!

__________________
With best regards

Al

I love these strings! It is true that there are limitation by the fuel management systems BUT it seems the boys over on the Porsche forums seem to get a good response and Mercedes used it to produce a variety of HP up to 242 plus. Having said that... without the solid lifters of the early models revs and therefore HP will be limited without a new fuel management system. A fellow over on benzworld used megasquirt and GM parts to get some good revs and has mileage. It's worth a look. But then there are other laws of physics at play. The engines are designed for torque. The cars are designed for cruising. I own 7 Mercedes. Most are M117's. I have two 500's. I have an M119 that is quick... for it's age. But all of my cars can be lapped by a V-6 Camry. But who in God's name wants to own a Camry? (In fairness a modern MB runs circles around.... most anything). I mean you have to think about the era your car was created! If it's the 80's then think gas crunch! High interest rates, major cold war stuff. One of my babies was a special order 450SLC. It's original owner was a B17 bomber pilot who retired as a United pilot. (His name is all over the car!) Sometimes it's not how fast you get there but that you first get there... again and again.
But to answer your question: increase spark, air, displacement, fuel delivery and exhaust excursion. That's a recipe for horsepower. 250? Not gonna happen. 220? Very doable.