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  #1  
Old 04-05-2004, 11:50 PM
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Lightbulb 0-60 in 15 sec? after the TURBO?

How fast does it go when the turbo kicks into play? On a 300SD? 81 +


when does the turbo normaly kick in?

and when it does what would it take to get from that point to another, say 20 + miles more? anyone have any experience?

*instead of counting 0-60 mph the sec, try counting after the turbo engages, maybe 40-70*
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  #2  
Old 04-06-2004, 12:01 AM
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My 20-40 mph time was about 5 sec.
-Joe
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  #3  
Old 04-06-2004, 03:29 PM
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If the engine is running properly, you should be at max boost by around 2000rpm. If not, most likely the IP is low on fuel delivery off idle, which you can try fixing with an ALDA adjustment. Anyway, 15 seconds 0-60 on a 300SD is factory spec, AFAIK, and if you're getting those times the car is running fine. If it's more like 20 seconds or worse, something is wrong. It's not supposed to be a 'fast' car, ya know!

:p
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  #4  
Old 04-06-2004, 03:47 PM
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I was talking to a couple of young turbo-informed guys that are into import cars and performance stuff yesterday. They said the KKK and the garret our cars have are not especialy good turbos as far as spool up time and effeciency. They were probibly great two decaded or more ago, but there is a lot better available today. Makes one want to spend a bunch of money and experiment...
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Old 04-06-2004, 04:01 PM
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The ricer/import guys have GAS engines, which respond to BIGGER turbos. Our diesels would choke on a bigger turbo. Now if we could get something that would bolt up, in the same size, but with lighter weight cartridge and/or freer spinning bearings, that could posibly provide some improvement - *maybe*. The MB engine reaches full boost very early, so I don't quite understand how a different turbo is supposed to help much anyway. Intercooling is the way to go for real power gains on an MB turbodiesel.

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Old 04-06-2004, 04:27 PM
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Oh, you think so little of me that I'd associate with ricers? :p

One of these guys is running a v6 turbo T-bird in the 11's(daily driven) and the other was in the middle of fabing a twin turbo setup for some really sedate looking import 4 door sedan, there version of a sleeper I think.

Anyway, I made it clear from the start it was not really a lack of full boost, just how long it took to get there. They said the impeller was heavy and an ineffecient design, that for a given exhaust gas flow it was not turning up to speed as fast or makeing as much boost for a given impeller speed as a newer one. They named a few that are common and might bolt up.
It'd be a little nieve to think turbo technology had stood still all this time anyway. One of them was also looking through some part number books and said the SDL had a newer version of the Garret I think it was...


I have always thought a quicker spooling turbo would be a fine thing on thise motors. I want full boost at no higher than 1200rpm. Dammit.
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  #7  
Old 04-06-2004, 04:43 PM
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Didn't we just go thru all this stuff awhile ago? :p
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Old 04-06-2004, 04:48 PM
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Quote:
Originally posted by rickg
Didn't we just go thru all this stuff awhile ago? :p
Probibly..



Oh and..

Igor!
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Old 04-06-2004, 05:10 PM
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It's EYE-gor!




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  #10  
Old 04-06-2004, 05:13 PM
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Quote:
Originally posted by rickg
It's EYE-gor!




Do you also say Frodrick?



I love that movie..
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  #11  
Old 04-06-2004, 05:27 PM
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LOL

Anyways, here's the "discussion" I was thinking of. Everything you ever wanted to know about turbos, but were afraid to ask:

http://www.peachparts.com/shopforum/showthread.php?threadid=85891

It kinda went on and on, but there's some good stuff in there if you pick thru it.
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  #12  
Old 04-06-2004, 08:26 PM
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Quote:
Originally posted by wolf_walker
I was talking to a couple of young turbo-informed guys that are into import cars and performance stuff yesterday. They said the KKK and the garret our cars have are not especialy good turbos as far as spool up time and effeciency.
Strange. The Garrett T3 (not T03, T04, but the good ol' T3) is a popular candidate for boosting Honda engines.
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  #13  
Old 04-06-2004, 09:47 PM
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I'm curious, Why would an intercooler work well on these engine? like any other restriction, an intercooler will cause a pressure drop even if density is improved by dropping the inlet air temp. Even if you compensate by changing the wastegate setting turbo lag will increase. Also, as the ALDA is a pressure device it wont respond to the increase in density correctly because of he pressure drop. If you crank up the ALDA to where it fuels for the intercooled air correctly it will over fuel at lower levels of boost.
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  #14  
Old 04-06-2004, 11:32 PM
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Boost over 15psi is not bad as long as EGT's are low enough, and cylinder pressure is not insanely high. People have beefed up OM617's with 25-35psi of boost and gotten plenty of power. The problem is the cost and the labor time - many thousands of dollars and hundreds of hours. Very low ROI! More boost heats up the intake charge and makes intercooling more of a requirement, not an option, as boost rises.

FWIW, Mosselman's kits leave the stock boost setting and simply enrich the pump internally, and get the aforementioned 20% power gain safely.
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  #15  
Old 04-07-2004, 12:00 AM
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Quote:
Originally posted by speedy300Dturbo
Strange. The Garrett T3 (not T03, T04, but the good ol' T3) is a popular candidate for boosting Honda engines.
Got me. I got out the factory service manual and told them the it was one of the two turbos listed in there, and they were not real big on it, even for this application. I'm by no stretch a turbo know-it-all.
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