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Old 08-10-2015, 07:14 AM   #1
mvance30
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FI noob questions

I did search but didn't really find any answers. I know in the e36 world people tend to turbo m52b25s(325 motors) as they're a lot cheaper to begin with but people also say they can handle more abuse. Is this the same for the m54s? IE if one was to start a project they should start with a 325 over a 330 unless they were building the motor?

Also the dream is to have an turbo e46 xi, I've only seen a handful of them out there I'm not looking at big power but does anyone have first hand experience with turbo awd e46s? Do the computer systems have a hard time coping with the extra power? How does the drivetrain hold up? From what I've heard from supercharger and turbo charger kit makers, the xi's are basically the same set up theres one or two things that need to be changed due to a little less clearance but besides that they bolt up the same.
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Old 08-10-2015, 08:16 AM   #2
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Give this a serious read.


http://forum.e46fanatics.com/showthr...hlight=nitrous




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Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!
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Old 08-10-2015, 08:29 AM   #3
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Nitrous is a great "bargain" but doesn't fit what I'm looking for.
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Old 08-10-2015, 08:37 AM   #4
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Nitrous is a great "bargain" but doesn't fit what I'm looking for.
I hear ya, Oh well.

If you ever took a ride in even just a 50 shot nitrous car, you'd probably change your mind.....



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Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!
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Old 08-10-2015, 08:43 AM   #5
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I hear ya, Oh well.

If you ever took a ride in even just a 50 shot nitrous car, you'd probably change your mind.....

Rob43
I've been one a nitrous car before. They're a blast. Just not something i'm looking for.
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Old 08-10-2015, 08:50 AM   #6
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I've been one a nitrous car before. They're a blast. Just not something i'm looking for.

Then I wish you great success with your 325Xi Turbo or Supercharger build.



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Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!
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Old 08-10-2015, 01:38 PM   #7
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Originally Posted by mvance30 View Post
I did search but didn't really find any answers. I know in the e36 world people tend to turbo m52b25s(325 motors) as they're a lot cheaper to begin with but people also say they can handle more abuse. Is this the same for the m54s? IE if one was to start a project they should start with a 325 over a 330 unless they were building the motor?

Also the dream is to have an turbo e46 xi, I've only seen a handful of them out there I'm not looking at big power but does anyone have first hand experience with turbo awd e46s? Do the computer systems have a hard time coping with the extra power? How does the drivetrain hold up? From what I've heard from supercharger and turbo charger kit makers, the xi's are basically the same set up theres one or two things that need to be changed due to a little less clearance but besides that they bolt up the same.
Its getting almost simple with the last innovations in Software these days. Have a read in this and the dme section of the Forum and iīm shure you will find your answers.
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Old 08-10-2015, 01:53 PM   #8
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Can't comment on the 325 but I can say that FI on the 328Ci is a risky adventure. Expensive, fickle, and not worth the power output. We got up around 450 or so but the motor is very unhappy even with free-flowing everything and meth for cooling/cleaning
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Old 08-10-2015, 02:11 PM   #9
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Its getting almost simple with the last innovations in Software these days. Have a read in this and the dme section of the Forum and iīm shure you will find your answers.
i'll take a look thank you.

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Can't comment on the 325 but I can say that FI on the 328Ci is a risky adventure. Expensive, fickle, and not worth the power output. We got up around 450 or so but the motor is very unhappy even with free-flowing everything and meth for cooling/cleaning
Yea I wouldn't be looking at that kind of power levels without a rebuild More around 300 or high 200's. I'm not looking for an all out track star. Something that would give an STI a beating so not much is needed.
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Old 08-10-2015, 02:24 PM   #10
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i'll take a look thank you.



Yea I wouldn't be looking at that kind of power levels without a rebuild More around 300 or high 200's. I'm not looking for an all out track star. Something that would give an STI a beating so not much is needed.
Looking at your signature, might also want to suggest looking into how the AWD aspect will play into this. They definitely are fun boosted cars.. just want to make sure you don't get in over your head with price points. Expect to need headers, exhaust, maybe a new diff, an intercooler, and i would highly suggest meth for cooling and AFRs
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Old 08-10-2015, 02:35 PM   #11
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Looking at your signature, might also want to suggest looking into how the AWD aspect will play into this. They definitely are fun boosted cars.. just want to make sure you don't get in over your head with price points. Expect to need headers, exhaust, maybe a new diff, an intercooler, and i would highly suggest meth for cooling and AFRs
It wouldn't be this current car that I have but I would like to do an XI build. but even the 330xi manual is too slow for what I want. I was thinking of just moving up to a 335 xdrive but whats the fun in that?
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Old 08-10-2015, 02:40 PM   #12
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Quote:
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It wouldn't be this current car that I have but I would like to do an XI build. but even the 330xi manual is too slow for what I want. I was thinking of just moving up to a 335 xdrive but whats the fun in that?
I can say you will have quite a challenge trying to make a non-m E46 as fast as a modified 335i.

My buddy has the 650 horsepower Active kit on his E46 M3 and gets regularly beat out by modded 335s.
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Old 08-10-2015, 02:59 PM   #13
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I can say you will have quite a challenge trying to make a non-m E46 as fast as a modified 335i.

My buddy has the 650 horsepower Active kit on his E46 M3 and gets regularly beat out by modded 335s.
goal is roughly the speed of a stock 335xdrive.
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Old 08-10-2015, 03:04 PM   #14
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Yea I wouldn't be looking at that kind of power levels without a rebuild More around 300 or high 200's. I'm not looking for an all out track star. Something that would give an STI a beating so not much is needed.
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It wouldn't be this current car that I have but I would like to do an XI build. but even the 330xi manual is too slow for what I want. I was thinking of just moving up to a 335 xdrive but whats the fun in that?
I thought this was a serious thread but it doesn't sound like you even know what you want or what car to bolt this stuff on to.
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Old 08-10-2015, 03:13 PM   #15
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I thought this was a serious thread but it doesn't sound like you even know what you want or what car to bolt this stuff on to.
How so? I thought I was pretty clear.

I'm looking to build an awd e46 to be the speed of a sti or 335 (similar specs). Which would be a more reliable starting point. 325 or a 330?
I choose those points because if done right the stock engine internals can handle it so no need to rebuild the engine. At that point I'd be better off with the 335.

do you want me to draw pictures to explain that?
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Old 08-10-2015, 03:15 PM   #16
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It wouldn't be this current car that I have but I would like to do an XI build. but even the 330xi manual is too slow for what I want. I was thinking of just moving up to a 335 xdrive but whats the fun in that?
This
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Old 08-10-2015, 03:18 PM   #17
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This
yes. stock 330xi is too slow for what I'm looking to do. How is that complicated?
If I was looking to go faster I'd be better off building the engine. If I was to do that the cost would put me into e90 335 area.
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Old 08-10-2015, 06:50 PM   #18
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Old 08-11-2015, 12:12 AM   #19
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yes. stock 330xi is too slow for what I'm looking to do. How is that complicated?
If I was looking to go faster I'd be better off building the engine. If I was to do that the cost would put me into e90 335 area.
Its pretty common in cheapo FI threads some people just need to give their 2Cent. Regardless if there is anything usefull in their sentencies or not.

Donīt give to much on what those people say, it can be done pretty easily with some fabricational skills or having someone machine you some piping. Pretty much the rest is straight forward.

Look for Hageee in here, he has had a 330xi with decent supercharger kit. Unfortunally it was a 330xiA, so the gearbox couldnīt handle to torque.

Davew is doing a cheapo build on a 325 and Hobbit382 is doing some serious build on several 3L+ engines

Tuning can be done pretty easily and for free. There will be some nice hardware and software mods in the future
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Old 08-11-2015, 05:44 PM   #20
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Its pretty common in cheapo FI threads some people just need to give their 2Cent. Regardless if there is anything usefull in their sentencies or not.

Donīt give to much on what those people say, it can be done pretty easily with some fabricational skills or having someone machine you some piping. Pretty much the rest is straight forward.

Look for Hageee in here, he has had a 330xi with decent supercharger kit. Unfortunally it was a 330xiA, so the gearbox couldnīt handle to torque.

Davew is doing a cheapo build on a 325 and Hobbit382 is doing some serious build on several 3L+ engines

Tuning can be done pretty easily and for free. There will be some nice hardware and software mods in the future
thanks for some actual help! I will look into all of that.
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