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#1
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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* |
#2
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My 20-40 mph time was about 5 sec.
-Joe
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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate Sooner or later every car falls apart, ours does it later! -German Narrator in a MB Promotion Film about the then brand new W123. |
#3
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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 |
#4
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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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One more Radar Lover gone... 1982 VW Caddy diesel 406K 1.9L AAZ 1994 E320 195K |
#5
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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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#6
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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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One more Radar Lover gone... 1982 VW Caddy diesel 406K 1.9L AAZ 1994 E320 195K |
#7
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Didn't we just go thru all this stuff awhile ago? :p
__________________
past MB rides: '68 220D '68 220D(another one) '67 230 '84 SD Current rides: '06 Lexus RX330 '93 Ford F-250 '96 Corvette '99 Polaris 700 RMK sled 2011 Polaris Assault '86 Yamaha TT350(good 'ol thumper) |
#8
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Quote:
Oh and.. Igor!
__________________
One more Radar Lover gone... 1982 VW Caddy diesel 406K 1.9L AAZ 1994 E320 195K |
#9
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It's EYE-gor!
__________________
past MB rides: '68 220D '68 220D(another one) '67 230 '84 SD Current rides: '06 Lexus RX330 '93 Ford F-250 '96 Corvette '99 Polaris 700 RMK sled 2011 Polaris Assault '86 Yamaha TT350(good 'ol thumper) |
#10
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Quote:
I love that movie..
__________________
One more Radar Lover gone... 1982 VW Caddy diesel 406K 1.9L AAZ 1994 E320 195K |
#11
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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.
__________________
past MB rides: '68 220D '68 220D(another one) '67 230 '84 SD Current rides: '06 Lexus RX330 '93 Ford F-250 '96 Corvette '99 Polaris 700 RMK sled 2011 Polaris Assault '86 Yamaha TT350(good 'ol thumper) |
#12
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#13
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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
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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. |
#15
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Quote:
__________________
One more Radar Lover gone... 1982 VW Caddy diesel 406K 1.9L AAZ 1994 E320 195K |
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