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+--- Thread: 1985 300d wanting performance (/showthread.php?tid=3033)
1985 300d wanting performance - Waterloo49 - 10-16-2011
just bought a 1985 non turbo 300d.
all new to the mercedes been building cummins trucks for years so i got a good understanding of mechanical diesel. ive been reading up on turning up the pump, i put an intake and exhaust on it.
i want to know if i can put a turbo on this car. i also want to know if anyone makes aftermarket bigger injectors for it. any help would be great
RE: 1985 300d wanting performance - larsalan - 10-16-2011
The turbo motors have these nice little squirters that cool the piston bottoms. na motor does not have them.
Should have the turbo motor if you want superturbo power
RE: 1985 300d wanting performance - Waterloo49 - 10-16-2011
true but if you get the ratio and tuing right that shouldnt matter
im not looking for insane boost pressure i just want a little more power. if i ran a big enough intercooler heat shouldnt be an issue
RE: 1985 300d wanting performance - willbhere4u - 10-16-2011
I have a turbo on a NA 616 with out the piston squirts I run 10psi safely! But you have to monitor EGT's I have an Exhaust gas temp gauge preturbo and try not to exceed 1100*f
It takes 2-3 minutes of full throttle high rpm driving up a steep hill to get near there usually I stay around 650-900 with normal cruising with out an intercooler
You probably wont need an intercooler unless you have a custom build injection pump a stock pump should never reach that performance level. mabey 140hp 200lbs max on a stock turbo pump! the element are to small to make real power
but its a lot better than the 90hp and 120lbs a non turbo617 puts out
The turbo pistons and rods a a lot beefier and the crankshaft are hardened unlike the N/A's
RE: 1985 300d wanting performance - larsalan - 10-16-2011
well, you (I) learn something new everyday.
RE: 1985 300d wanting performance - Waterloo49 - 10-16-2011
pyro is getting installed tomorrow gauges are the first thing i put on with any diesel build. i just wanted to know what temps they would handle. im used to cummins being able to handle 1600 plus in short bursts. i hit 2400 in my first gen drag truck multiple times with no issues.
willbhere4u are you running an intercooler? what are you running for a turbo?
im still wanting to know what i can run for fuel mods too. i have a couple electric high flow lift pumps laying around how much fuel pressure will the pump hold? i usually run 15psi to a bosch p pump
RE: 1985 300d wanting performance - willbhere4u - 10-16-2011
I have an ancient Rajay non wast gated fb40 with out an intercooler as of yet!
People have added external fuel pumps but it makes the cars smoke at idle and nobody has noticed any real performance gains from it
stock They have a mechanical lift pump on the side of the main injection pump usually you can take them off and stretch the spring back to spec and they work like new!
RE: 1985 300d wanting performance - Waterloo49 - 10-16-2011
you happen to know what the specs are on it?
RE: 1985 300d wanting performance - willbhere4u - 10-16-2011
The turbo? It has an F flow compressor and B flow exhaust with a 40 trim compressor wheel I don't know much about it except it was a kit made for early 70's 200,220,240 diesels I found it at a junk yard and grabbed it and the manifolds and put it back together I plan on garbing some factory turbo manifolds off the 617 5cylinder and modifying them to fit the 4cylinder 616 and upgrading it to a t3 like the 300 turbos came with
You said your car was an 1985 300d non turbo? Is it a European model car? I just picked up a euro 1985 300td wagon non turbo 5spd
I ask because all of the 300d sold after 1982 in the US where turbo
RE: 1985 300d wanting performance - Waterloo49 - 10-16-2011
its a euro car. its got american parts such as the lights and gauge cluter i plan on switching them back to euro spec.
i have a design drawn out to make it turbo with out changing manifolds or anything i just need to know what i can run for a turbo the fabrication and plumbing is the easy part.
RE: 1985 300d wanting performance - willbhere4u - 10-16-2011
I would grab the turbo manifolds and turbo off a turbo 300d
The oil line runs to the back of the oil filter housing. It has plate on the back of oil filter housing that you can swap off the turbo car to get your oil feed to the turbo. The tricky part is the oil return I took the lower oil pan off. And drilled the upper aluminum oil pan for a big AN fitting and bolted it on there. And I also put a new dent free lower oil pan on $40 band new!
The best part about the 5 cylinder is the turbo parts bolt right on them
RE: 1985 300d wanting performance - Waterloo49 - 10-16-2011
i was going to braze a fitting onto the pan for the return. finding as scrap turbo car around here isnt going to be easy
RE: 1985 300d wanting performance - willbhere4u - 10-17-2011
I bet You could probably find everything you need cheap on eBay
I went in the upper oil pan because that was where the stock turbo car had its oil drain! It dumps strait down with no twist or turns
I've heard of problems with turbo return lines below oil level causing excessive back pressure causing turbos to leak past there seals that was my concern with going in to the lower oil pan
RE: 1985 300d wanting performance - ronnie - 10-18-2011
Injectors do not seem to be a problem, at least as far as being able to support more hp. I have reamed out the pre chamber holes slightly, and found that helps.
RE: 1985 300d wanting performance - willbhere4u - 10-18-2011
The guy with the big horsepower cars in Finland all run stock injectors
RE: 1985 300d wanting performance - Waterloo49 - 10-27-2011
do therse cars need back pressure to run? i know turbo diesels dont, i wanna run 3in pipe manifold back will i have any problem? i uilt a cold air intake for it last week upped throttle response a little bit, not alot but it was noticable. car needs injectors replaced so im going to order a set of them monarch injectors for it
RE: 1985 300d wanting performance - ronnie - 10-27-2011
you are not dealing with a fuel/air mixture like a gas car, so I see no reason to hold some back pressure. Perhaps someone with some time on a dyno trying differant exhuasts can say with a bit more authority.
I am currently running stock exhaust manifold, but larger pipes(2.250 instead of the stock 1.750) and larger muffler on my 240. Custom intake manifold, stock air filter.
If you want to try it a tuned intake helps a good bit. Either with or without turbo. I do not have a turbo on yet. If you do not put a turbo on yet enlargeing the pre chamber holes really helps. I was surprised at the differance. Mind you I have turned up the fuel a good bit. Think this mod will help with a turbo too. I tend to think of these things to do as a pre requsite to the turbo.
RE: 1985 300d wanting performance - carlitosgy6 - 10-27-2011
(10-27-2011, 07:06 AM)ronnie you are not dealing with a fuel/air mixture like a gas car, so I see no reason to hold some back pressure. Perhaps someone with some time on a dyno trying differant exhuasts can say with a bit more authority.
I am currently running stock exhaust manifold, but larger pipes(2.250 instead of the stock 1.750) and larger muffler on my 240. Custom intake manifold, stock air filter.
If you want to try it a tuned intake helps a good bit. Either with or without turbo. I do not have a turbo on yet. If you do not put a turbo on yet enlargeing the pre chamber holes really helps. I was surprised at the differance. Mind you I have turned up the fuel a good bit. Think this mod will help with a turbo too. I tend to think of these things to do as a pre requsite to the turbo.
the engine its noisier with the prechamber holes enlarged?how much to enlarge?
RE: 1985 300d wanting performance - Captain America - 10-28-2011
There was a huge thread on the prechambers not too long ago!
http://www.superturbodiesel.com/std/Thread-Prechamber-Mod-Flame-Front
RE: 1985 300d wanting performance - JustPassinThru - 10-28-2011
(10-16-2011, 11:39 PM)Waterloo49 i was going to braze a fitting onto the pan for the return. finding as scrap turbo car around here isnt going to be easy
I have extras (with EGR, though) of the intake and exhaust manifolds for my 1985 300D. I'd be willing to let them go. I paid $80 apiece for them though. They're $20-25 or so at Pick'n'Pull, when they have them. PM me with an offer, if interested.
RE: 1985 300d wanting performance - ronnie - 10-28-2011
I enlarged all holes by .009", this is on my 240 and the holes are all the same size. You will have three differant sized holes.
The post on pre chambers does not ever say what was done if I recall right? I posted what I did on peachparts at the end of the eeking out more on 240 post. I'll have to copy that over here sometime.
RE: 1985 300d wanting performance - Captain America - 10-28-2011
I believe there was or in another similar thread...