Skip the auto shop - Our mechanics make house calls

Q: can i put a turbo on my 4.2L V8? and if i can what would it take to do it?

asked by on

im buying a E420 with a 4.2L V8 and i want to put a turbo under the hood, im not very motor savy and am not sure if i can do this, and if i can what its going to take, price estimate, explanation on what needs to happen for it to work would be much appreciated
My car has an automatic transmission.

I’ve never put a turbocharger on a Mercedes V8, but I suppose with enough time and money, anything is possible. There are kits out there for turbocharging just about anything, including the Mercedes V8, but as with anything some are better than others, so you need to do a lot of homework. You might consider a belt driven supercharger instead of a turbocharger. There are some kits available, and installing a supercharger would mean you don’t have to mess around with the exhaust which is in very tight quarters. Installing the hardware can go pretty quickly, but as with any engineering project, the devil is in the details. If the engine is not in top condition, installing a turbo or a supercharger will bring out any faults very quickly. Boosting the intake puts a great deal of stress on the engine internals and with just a little too much boost, or if the fuel mixture is just a little too lean, you can trash a perfectly good engine in the blink of an eye. cars that were manufactured with turbos or superchargers have a lot of safety controls built in to keep this from happening, but they ruined a lot of engines in research and development coming up with these controls. You may find yourself in uncharted territory and toast an engine before you realize you have a problem. So good luck with your project! I would guess that it will cost more than the car you want to buy, But it sounds like a lot of fun!

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. can i put a turbo on my 4.2L V8? and if i can what would it take to do it?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Check Engine light on

If the Check Engine light came on in relation to the fuel cap being replaced, then that means it may not be a fuel cap related problem. I would recommend having the vehicle scanned for trouble codes by a knowledgable...

Q: The car shutters, has difficulty accelerating

The flashing Check Engine Light indicates a fault that has the potential to damage the vehicle's catalytic converter. The car flashes the Check Engine Light to let you know that the car should be checked as soon as possible. Catalytic...

Q: Car starts after keeping ignition on for few minutes

Hi Vivek. Thanks for sending in your question today. It is quite possible that the valve cover leak might be related to the slow-starting issues. If oil is leaking into the spark plug holes, this could cause delated starting issue....

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.