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      05-02-2007, 12:01 AM   #1
BigGuy
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question bout swapping engines

is it possible to swap engines from a 3.0 si with a m roadster? just a curious newbie thought. responses would be much appreciated.
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      05-02-2007, 12:47 AM   #2
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it's cheaper and easier to just buy the car you want
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      05-02-2007, 07:04 AM   #3
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Quote:
Originally Posted by BigGuy View Post
is it possible to swap engines from a 3.0 si with a m roadster? just a curious newbie thought. responses would be much appreciated.
Its possible, but difficult. You would have to not only switch the engine, but the transmission as well as the wiring harness/dme for the engine which is a bit of a task. Then there are the the little changes such as in the drivetrain/suspension which help to make the real M car a more balanced car. Like ward said, its going to be alot easier/cheaper to actually sell your car and get an M roadster
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      05-02-2007, 07:53 AM   #4
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there are literallyonly a handful of people that have transplanted the s54 engine,I think there is a reason for that.its probably alot of labor so people dont do it
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      05-02-2007, 10:04 AM   #5
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it's cheaper and easier to just buy the car you want
EXACTLY
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      05-10-2007, 03:06 PM   #6
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I agree too, your talking a different computer, power steering versus electric steering, etc. What a few folks have done and had great results is supercharging. A supercharged 3.0 liter puts out close to the same HP as a ///M and about 60 ft lb of torque more than ///M at much lower RPMs which makes it a hoot to drive! Its very reliable and more affordable than buying another car
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      05-28-2007, 03:25 AM   #7
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Can get a nov 2006 with less than 1,000 miles for 33K same price as a new 3.0SI why bother and you will still get 2 1/2 years wty. wow the price just drops and drops.


so 10K + Drop in 6 months.

A year old Boxster S would set you back 38K and standard boxster 33K even 2005 standard boxsters are still 30K
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      08-09-2007, 05:43 PM   #8
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Everything is doable if you have money.

The easiest way to swap the engine would be to use an adapter plate for the tranny assuming its not a bolt up to the 3.0si tranny, and just run a standalone ECU and have it dyno tuned.

I don't understand why everyone thinks swaps are the end of the world. You don't need to swap EVERYTHING that comes on the M to build your own. If all you want is the engine, its doable.

All you need is a wrecked M3 or Z4M with the engine still in tact.
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      08-09-2007, 05:59 PM   #9
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Quote:
Originally Posted by pbdm4k View Post
Everything is doable if you have money.

The easiest way to swap the engine would be to use an adapter plate for the tranny assuming its not a bolt up to the 3.0si tranny, and just run a standalone ECU and have it dyno tuned.

I don't understand why everyone thinks swaps are the end of the world. You don't need to swap EVERYTHING that comes on the M to build your own. If all you want is the engine, its doable.

All you need is a wrecked M3 or Z4M with the engine still in tact.
I agree with the first bit, but the rest is way too much of an oversimplifacation. There's more to it than just swapping engines and fitting it to the tranny. The entire engine bay is different. Almost everything under the hood would have to be swapped out. Plus if you have a 5 spd manual you're not going to get the most out of the engine, so you'll probably want to upgrade that too. While you're at it you might as well pull a smg tranny out of an E46 M3 and stick in there
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      08-09-2007, 09:37 PM   #10
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Quote:
Originally Posted by pbdm4k View Post
If all you want is the engine, its doable.
If all you want is the engine, all you're getting is the extra horses, and if all you want is more horsepower, there are better ways of going about it. If you want the performance of an M, you'll need the suspension, hydraulic steering, M-diff, etc. - suddenly, spending $10 grand more for the M seems a bargain.

This mod is similar to a threesome with Paris Hilton and Britney Spears - sure, it's do-able, but that doesn't mean it's sensible.
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      08-09-2007, 10:37 PM   #11
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      08-10-2007, 11:45 AM   #12
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Quote:
Originally Posted by epbrown View Post
If all you want is the engine, all you're getting is the extra horses, and if all you want is more horsepower, there are better ways of going about it. If you want the performance of an M, you'll need the suspension, hydraulic steering, M-diff, etc. - suddenly, spending $10 grand more for the M seems a bargain.

This mod is similar to a threesome with Paris Hilton and Britney Spears - sure, it's do-able, but that doesn't mean it's sensible.
I agree with you that there are easier ways to make power if that's all you want, but I just also want to reiterate that while the M cars are simply amazing for power delivery and handling, one can easily outperform it with other modifications that don't require everything the M has, such as the hydraulic steering and M differential. Leave the electric steering alone, get a quaiffe, KW coilovers are probably cheaper then the M suspension and offer significantly better handling and adjustibility. There's endless opportunities out there and there's no point in fearing what seems like a daunting task. Set a goal and aim to achieve it. It's all doable.

And with my own car, with my own goals, given time and money, I will have a Z4 that outperforms the M in every way possible. (Mind you I also set a budget so as NOT to exceed the price of a brand new Z4M.)

But regards to simply wanting more power, what about the uniqueness factor?

For example, last time I was in a car shop a few days ago, I saw a 240sx with a 2JZ sitting in the engine bay waiting for the front mount and turbo to be bolted in.

Why not bolt in an RB? its much easier... then again... who the heck have you seen put a Toyota engine inside a Nissan? Nice to be the first to do things.
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      08-10-2007, 11:48 AM   #13
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Quote:
Originally Posted by Dammmittt View Post
I agree with the first bit, but the rest is way too much of an oversimplifacation. There's more to it than just swapping engines and fitting it to the tranny. The entire engine bay is different. Almost everything under the hood would have to be swapped out. Plus if you have a 5 spd manual you're not going to get the most out of the engine, so you'll probably want to upgrade that too. While you're at it you might as well pull a smg tranny out of an E46 M3 and stick in there
As far as I can tell about the engine bay, its just the transmission tunnel that is larger on the M due to the larger tranny.

Its a pretty damn big engine bay and I wouldn't worry about the engine not fitting. Hell Hartge and ACS have been shoving V8's and twin turbo engines under the hood of many a Z4 for years.
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      08-10-2007, 10:30 PM   #14
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Quote:
Originally Posted by pbdm4k View Post
I agree with you that there are easier ways to make power if that's all you want, but I just also want to reiterate that while the M cars are simply amazing for power delivery and handling, one can easily outperform it with other modifications that don't require everything the M has, such as the hydraulic steering and M differential. Leave the electric steering alone, get a quaiffe, KW coilovers are probably cheaper then the M suspension and offer significantly better handling and adjustibility. There's endless opportunities out there and there's no point in fearing what seems like a daunting task. Set a goal and aim to achieve it. It's all doable.

And with my own car, with my own goals, given time and money, I will have a Z4 that outperforms the M in every way possible. (Mind you I also set a budget so as NOT to exceed the price of a brand new Z4M.)
It takes more than Coilovers to make a Z4 suspension better than the M Coupe's. You may have a point with adjustability though... And the electric steering is crap, lets face it, you get almost no feedback from the road and there's the tramlining and maintanence issues.

I think the second part is a hell of a lofty goal. Unless you are doing all of your own labor, good luck to you.

Quote:
Originally Posted by pbdm4k View Post
As far as I can tell about the engine bay, its just the transmission tunnel that is larger on the M due to the larger tranny.
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From the hood down you got lots different.
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