ah... knowledge. Thank you very much i WILL be refrencing that because it is genious. I was wondering about the max rpm adjustment but figured it had less to do with performance more to do with max rpm limiting. I am auto powered so no more rpm would do me any good but... it would be nice for it to fall off less on the top end. As a side note i am a gas burner at heart and really feel like anything less than 1hp per cubic inch is really just a waste of time.... why is everyone afraid of a 146 cubic inch engine making near those power levels?

You are welcome. We are going to get along just fine!!

I totally agree with you. As to why the angst… the only thing that I can come up with is, knowledge is power, if you get what I mean. 99% of the members are open to discussing, learning, and trying new things. I can honestly say I have enjoyed my time here since joining. I have learned a lot and hope to continue to learn.

It would probably be a good idea to get the trans up to speed before you tweak the upper power band. No sense burn up the trans.

Any ideas on uping the line pressure? We are getting snowed on so business is slow so i suppose tomorrow will be for a bit of trans nursing and maybe MAYBE if it is cheap a egt gauge if i can find one. Or maybe i will snag a thermo couple and try to get some kind of accurate reading (wouldnt want to worry the forum kids) . If i can take care of those two i might try and search for some boost leaks and try to get some more air in there and see if my egr is leaking.... smoke is bad mkay (It is kinda fun trailing a bunch of black smoke i have to admit)

Well im calling it for tonight but i am still wondering about cutting the tips off of the pre chambers. It would leave the main chamber and tube alone would just "un cork" the end. You said earlier you would be worried about melting the piston just under it but flame fronts during combustion dont act like a flame thrower.. more like a pressure wave spreading out from the inital point of combustion. I will be pondering this for... well just because i can and it sounds like something fun to try.

What, exactly, do you have to hide? Are you afraid somebody that knows what they are doing will correct you?

You'll melt the engine from high EGTs.

There are far better and easier ways of doing that than blindly hacking away at a governor's adjustments.

OM616, the "Throttle Stop" is to prevent internal linkage binding. All you're doing by turning it out is reducing power.

The t-handle of the modulator is the adjustment. Altering it will also require readjustment of the VCV.

DO NOT destroy your engine by screwing around with the prechambers.

Incorrect.

Seriously, stop. Clearly neither of you don't have the first clue as to how the prechamber or the injection system operates. Stop and think before you pointlessly destroy your engines.
And if you want to childishly continue just to spite, have at it, take a video so I can sit back with some popcorn and make a night of it.

melt the pistons... just like modifying the internal settings right? Please if you refuse to be helpful dont help... I seriously doubt the stock pump is capable of producing catastrophic amounts of fuel with the presence of adequete amounts of air. Seriously if it manages 1hp per cube that will only be about 36 horse per cylinder .... that is only 17 over stock.... scary stuff and unlikely. Let me play with my engine go baby yours, but seriously thanks for all the help you have been wonderful.

and btw if i feel the need to back my 240 out of my garage into my driveway and put a brick on the pedal i can.. do you know why? it is mine. Dont tell me what not to do with it. I AM going to continue to modify it in any way i see fit because I own it. And no.. there are not better ways to keep up with traffic in a under-fueled indirect injected diesel without turning up the internal settings without buying elements (unlikely i will spend more on elements than i bought the car for) which both ways .. just add more fuel.

Yes, if you had even fundamental understanding of combustion you could see that.

False. The internal settings require precise adjustments, not somebody taking things apart and guessing what will happen.

Is your computer's monitor even on?

Your doubt is very wrong. Even in a 100% bone stock system, small things can cause major failure. Such as overboosting from a failed wastegate, a poor spraying injector or using poor quality fuel.

unfortunately your engine is not physically capable of that with the stock injection pump, no matter what you do to adjust it or hack up the prechambers. At the very most you'll see 116hp until you replace the pump.

Will do. Remember, VIDEO! I want to see it when you fire it up after you blindly hack up the prechambers.

If you had been paying even the slightest attention, you will see that nobody is trying to say otherwise. I'm simply trying to help you not make a very poor choice.

You keep begging "help me, help me, help me", yet when somebody DOES try to help you completely ignore me and instead chose to follow the guy playing wannabe-engineer.

What did I say earlier? Oh yeah; "And if you want to childishly continue just to spite". Thanks for proving me right about who you really are. Remember, TAKE VIDEO!

Lance- let them play- do you really care about a hunk of metal? If he melts or otherwise destroys his engine I can get five more for him at the junkyards here.

josha37, Lance is not talking JUST to you.
MANY (and I mean MANY) members and guests are reading this. Lance is posting information to prevent someone who DOES care about their engine from making mistakes and destroying it. (like your friend with the 617... longevity?) don't get bent out of shape, if someone makes critiques of suggested or implied modifications.

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

X2

I am following this thread with interest. We have Josha, a young guy who wants to experiment with an old car he got for the the price of a burger, & Lance, arguably one of the best resources on turbos diesels we have. Its kind of like the old school science teacher trying to stop the student blowing himself up in a prac class!! The amusing thing is that there is only a few years between them. I'm old enough to be both their fathers, just goes to show you are never too old to learn.
The smart thing to do is to take on board the info Lance is offering us. He has probably destroyed more turbos motors than most when he was a few years younger & now we can gain from that ! Just dont expect him to admit it.

__________________
Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving

Im not taking offense to what you are saying, just tired of hearing it. Like the others have said so what if it dies. I even posted "DONT DO THIS" If you love your benz dont touch it, period. Im not messing with the prechambers i have decided it is not worth the effort for what could very possiably be no good. I suppose it would bother you to know i have a 11.8:1 compression 383 in my firebird as well? Let me play, and for the love of god stop taking up entire pages breaking everything everyone says down. if you have a opinion voice it, quietly.

Ok so anyways to get back on track, i am going to get the trans shifting figured out and try and find a dry road. Hopefully i get some good 0-60 times . I drive 15 miles to work everyday on the interstate and have nothing but praise for its highway manners, the power is very impressive knowing how slow it was a few days ago. Are diesels great or what?

OK, it has been fun getting a little crazy, (although not my style, this is Josha37's thread, and I must say I have had some fun), but the parents are threatening to come back here, so....

In regards to cutting off the ends of the prechambers; without very large elements which will deliver all of the fuel well before the peek pressure point starts to collapse, as to allow all the fuel to be burnt in the natural pressure environment, (not pressure that is sustained artificially by the prechamber), the "open" prechamber will not be a step forward, because the pulse width, (how long the injection takes from start to finish), is too long with the small elements, and the natural pressure peek will begin to collapse before all the fuel is burnt, not good for high speed power.

Increasing the area of the holes, (and I mean area, not diameter), by 10 to 15% ea. would be a reasonable change that will allow the most benefit from the addition of a turbo and additional fuel.

A correctly calibrated prechamber will pose as little of a restriction as possible during compression, (filling), and provide the necessary sustainment of pressure due to the increased volume of gasses which resulted from the combustion. (in other words, one can get through the door very easily, but 50 will take some time).

We are waiting until the 10mm IP is done and then we will try the open prechambers as a system like you mentioned. If we are happy with the how it runs, I may put the engine on my dyno.

The trans is has a modulator and throttle pressure, (bodewin? Cable), just like a turbo 350 trans does, only the vacuum signal is controlled by a valve and not engine load. Make sure the cable is adjusted so it is fully extended at full power, (will raise shift pressure and delay shift to a higher RPM). The modulator control valve is adjustable, not sure it the modulator it self is. There is a lot of information on the transmission in this forum.

Once you have the trans under control, send me a PM and we will get the Top end power where you want it, (for what it is, that is).

All in all Lance may be a good thing after all, as I realized last night, I can spend way too much time on the computer with this stuff, not good. Plus I can see that Lance and I are going to be nothing but disruptive. Neighborhoods change all the time, people move on.

Josha37 I feel bad that your thread was chopped to hell by lance's help. I can see that this is going to be the norm now. I am too old for the bickering and new better before. I will no longer be posting on the Diesel section, or this section. Yes, that means that Lance wins, and like I give a fat frogs fanny.

I will monitor my messages and e-mail, so I can be reached if one is so inclined.

Ah, classy sir.