Engine Life with FI

[faded67]

Hey all. I'm brand new to this part of the forum and was wondering if engine life ids really affected as bad as I have heard with SCing a car.

[parad0x]

most likely the only people who will run into engine problems are people that are not doing the proper oil/filter changes. Adding a supercharger, will not put a serious constant strain on your engine, the only strain is at times when your pushing your engine to the max which is little anyways with only like small boost pressures. And that doesnt happen often, just when you need it unless you are tracking heavily.

But the small increase in friction for the amount of power/fun/prestige/cool factor you get inreturn out of a supercharger kit is a very small-small price to pay.

[meel330]

just like any engine if you take care of it it will be fine

[K-DOG]

There are 3 problems with FI that no one has touched on:

1) With FI you have higher temperatures within your combustion chamber. Which can and may burn off oil faster, reducing its efficiency at lubricating the engine.
2) There is a higher chance to run rich/lean/detonate, which of course we know is not very good.
3) If you have a turbo, you need a turbo timer. You cannot just turn on your car and floor it, or just turn it off and go to bed....warm up and cool down periods are a must.

You will have to pay closer attention to your engine, and even then, something will most likely break. (not anything serious necessarily....maybe just like the fuel pump will fail or something) You have to pay $$$ to play.

[iLLM3]

There are 3 problems with FI that no one has touched on:

1) With FI you have higher temperatures within your combustion chamber. Which can and may burn off oil faster, reducing its efficiency at lubricating the engine.
2) There is a higher chance to run rich/lean/detonate, which of course we know is not very good.
3) If you have a turbo, you need a turbo timer. You cannot just turn on your car and floor it, or just turn it off and go to bed....warm up and cool down periods are a must.

You will have to pay closer attention to your engine, and even then, something will most likely break. (not anything serious necessarily....maybe just like the fuel pump will fail or something) You have to pay $$$ to play.


Exactly! :bow:

[sTiZZiT]

There are 3 problems with FI that no one has touched on:

1) With FI you have higher temperatures within your combustion chamber. Which can and may burn off oil faster, reducing its efficiency at lubricating the engine.
2) There is a higher chance to run rich/lean/detonate, which of course we know is not very good.
3) If you have a turbo, you need a turbo timer. You cannot just turn on your car and floor it, or just turn it off and go to bed....warm up and cool down periods are a must.

You will have to pay closer attention to your engine, and even then, something will most likely break. (not anything serious necessarily....maybe just like the fuel pump will fail or something) You have to pay $$$ to play.

I mostly agree with everything but #3. In most cases, unless you flog your car immediately before pulling into your driveway and turning it off, turbo timers are not absolutly essential. My car idles leaner (hotter) than it drives in part throttle (no boost). When i know im going to park the car, i just take it easy for the last couple of minutes which is enough to lower the oil temps and prevent it from coaking in the housing.

And yes, i have taken my turbo apart, it looks just fine. I do have a turbo timer though and it comes in handy at the track when you're tired of sweating and dont want to stay and wait for your car to cool down (no a/c).

On the other hand, turbo timers are dirt cheap so buy one and dont listen to me lol!

Just my $0.02 :)

[samir@technik]

#1 is solved by proper fueling, preferably via direct DME tuning.

#2 is solved by #1

#3 does not really pertain to engine health, as much as it pertains to compressor longevity. But either way, a turbo timer is a simple mod to keep the oil temps from cooking your turbo/supercharger after a hard run.

The bottomline: A supercharger or turbo at <u>moderate</u> boost pressure will only increase overall engine stress by ~ 15% and not significantly decrease engine longevity. This is due to the way a cylinder burns air/fuel (it doesn't happen at one point in the crankcycle, but over a period of time)...a 50% increase in power does not equate to a 50% increase in stress loads.

There are 3 problems with FI that no one has touched on:

1) With FI you have higher temperatures within your combustion chamber. Which can and may burn off oil faster, reducing its efficiency at lubricating the engine.
2) There is a higher chance to run rich/lean/detonate, which of course we know is not very good.
3) If you have a turbo, you need a turbo timer. You cannot just turn on your car and floor it, or just turn it off and go to bed....warm up and cool down periods are a must.

You will have to pay closer attention to your engine, and even then, something will most likely break. (not anything serious necessarily....maybe just like the fuel pump will fail or something) You have to pay $$$ to play.

[K-DOG]

#1 is solved by proper fueling, preferably via direct DME tuning.

#2 is solved by #1

#3 does not really pertain to engine health, as much as it pertains to compressor longevity. But either way, a turbo timer is a simple mod to keep the oil temps from cooking your turbo/supercharger after a hard run.

The bottomline: A supercharger or turbo at <u>moderate</u> boost pressure will only increase overall engine stress by ~ 15% and not significantly decrease engine longevity. This is due to the way a cylinder burns air/fuel (it doesn't happen at one point in the crankcycle, but over a period of time)...a 50% increase in power does not equate to a 50% increase in stress loads.

Samir, I agree with you 100%...however your illustrations are more along the lines of a perfect world with perfect tuning. However, in the real world, many people have these re-occuring problems with their FI application.

[Mike Benvo]

Samir, I agree with you 100%...however your illustrations are more along the lines of a perfect world with perfect tuning. However, in the real world, many people have these re-occuring problems with their FI application.
Correct, but the software in the Technik kits is near perfect.

No problems with mine, and over 400bhp. :thumbup: to Technik.

[newtuner]

Cool down is not even that long we're talking one to one and a half minutes. So a timer is good. Some alarm systems have them built in, just push a botton and away you go.

[CiscoM3]

yea, no worries with FI if you take care of it. just keep your effective CR in check.

[Mike Benvo]

yea, no worries with FI if you take care of it. just keep your effective CR in check.
Effective Compression Ratio is based on the amount of boost and natural compression of the engine. That's a static ratio, depending on the factors above. You can have an ECR of 13:1 and still blow your motor.

Did you mean to say keep your AFR in check? That's what really matters.

[redronin]

how is mike benvo so crazy.... :loco:

you just find hp no one else can get to :bow:

[Mike Benvo]

how is mike benvo so crazy.... :loco:

you just find hp no one else can get to :bow:
http://forum.e46fanatics.com/images/smilies/wavey.gif

[Mteknic330ci]

how is mike benvo so crazy.... :loco:

you just find hp no one else can get to :bow:
:nerd: jk, he's a smart guy

[Mike Benvo]

:nerd: jk, he's a smart guy
http://forum.e46fanatics.com/images/smilies/new_all_coholic.gif

[silver4dracs]

I broke 125,000 miles with ASA :evil: