Any reduction in backpressure should help fuel economy AND power a little.

How does it sound with the cherry bomb? I am looking to make mine sound more powerfull but not loud when I eventually replace my exhaust.

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Ron Schroeder
'85 300 Turbo Diesel 2 tank WVO
'83 300 Turbo Diesel 2 tank WVO
Some former WVO vehicles since ~1980:
'83 Mercedes 240D
'80 Audi 4000D
'83 ISUZU Pup
'70 SAAB 99 with Kubota diesel
'76 Honda Civic with Kubota diesel
'86 Golf
Several diesel generators
All with 2 tank WVO conversion
LI NY

I seem to have gained a bit over 2 MPG with my VGT. I believe this is due to lower turbine inlet (back) pressure when cruising.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

THAT's worth the mod. Nice benefit.

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Gone to the dark side

- Jeff

Right. I can basically turn my turbo off when cruising, it makes only 0-2psi of boost and has little more restriction than a non-turbo engine.

I'm making 20hp, 46lb-ft more than stock (dyno verified) and still average 26mpg in mixed city+highway driving and 29mpg on highway trips.

How fast do you drive?

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John Robbins
'05 E320 CDI - 240k
'87 300TD - 318k

I am at 5-6 psi when crusing on the freeway. I could probably get a bit more economy by further opening the vanes at cruise, but for now I will stick with my simple actuator system. I just got 27.5 MPG on a highway trip at 65 MPH, up from 25 or so. I also still have the 3.69 rear end.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

70mph. I know for sure I can break 30mpg if I can keep it under 60mph.

Covert to run on waste veg oil. 80-113 MPG if you drive 50 miles to work. (summer or longer distances will improve MPG)

False, waste fryer crap will reduce base performance as well as the lifespan and long term performance.

I think he means MPGD as in miles per gallon diesel(warmup/shutdown cycles; not counting the "free" wvo

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

Mine is fairly quiet still as I kept the resonator. It is not much louder than stock. Most noise comes from the engine compartment. I do have an 85 Cali car that has an Ox cat and that also contributes to muffling the noise however.

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green 85 300SD 200K miles "Das Schlepper Frog" With a OM603 TBO360 turbo ( To be intercooled someday )( Kalifornistani emissons )
white 79 300SD 200K'ish miles "Farfegnugen" (RIP - cracked crank)
desert storm primer 63 T-bird "The Undead" (long term hibernation)

http://ecomodder.com/forum/fe-graphs/sig692a.png

The same way this guy claims his 400hp mustang gets 100MPG because it burns E85.

He would be getting 100mi/gal of paid fuel if he was distilling his own E100 and blending. However, the difference is he is paying for 100% of the fuel he burns, not 15%.

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99 E300 Turbodiesel 100k

No, the difference is he actually gets 16.5mpg.

Not bad, my mustang(before the engine seized) was getting 12-15mpg

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment