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bimmerfever365
09-08-2008, 03:14 PM
Hi everyone, im new to this site. I have a 1990 Bmw 535i and I love this car, its in great condition paint wise and interior. The only thing that I could think to do to it would be upgrading the performance. Money isnt primarily an issue at this point, im just looking for ideas or past experiences of fellow owners of this car. Nything would help, but im specifically looking to get a high performance exhaust and drop a new engine in it. So if any one has either done those 2 things or has knowledge on were i could fing the parts that information would be very helpful.

bimmerfever365
09-08-2008, 03:32 PM
helpp

Lavalamp425
09-08-2008, 09:59 PM
I had a 525i and didn't do any upgrades, so I have no direct experience with any of this.

For the exhaust you can upgrade the headers. This would give you a few more HP by allowing your exhaust to flow somewhat more freely. Its hard to find headers for E34s anymore because the cars haven't been manufactured for over 10 years now. There are various things you can do on the intake side that can provide small power gains that you might want to look at.

As for dropping another engine in, I'm not sure why you'd even want to bother; if its really that big a deal then I'd recommend you sell your 535i and get a 540i or M5. I have heard that it is relatively easy to swap the 4.0L M60 V8 (540i) engine out for the 4.4L M62 V8 (E39 540i and E38 740i), but I don't know the details. I would imagine this would be a much more difficult swap into a 535i (M20 I6). Google around, there's some information floating out there.

The first step for performance upgrades, though, would be to get a Conforti chip; this will gain you quite a bit of power, and its an easy mod.

Good luck.

bimmer dot info
09-09-2008, 07:11 AM
The engine swaps can be done. Just remember you will need to get all the computers to play nice. That can be the hardest part of all. Any e34 engine will bolt right up with the right brackets. Other engines might require a bit of fabrication.
Bavauto sells many performance parts. Take a look at bmwe34.net also.

COSMOS535
01-11-2009, 06:39 PM
I own a 1991 535i 5 speed standard. If you are looking for some performance out of your car, heres couple things that i did to my, and I easy can keep up with New 335i 2008 Twin Turbo BMW. I swap my Diff from 3.46 GR to 4.10 Gear Ratio. I Put in Custom K&N air intake, Custom Exhaust, DeNNon Computer Chip,. Just those Couple of thing gave me 302 WBHP (Wheel Base Horse Power) and i Started with 208HP. 96 HP Gain For about $1000 Not Bad I think.

ross1
01-12-2009, 07:06 AM
Swapping engines probably isn't a great idea as you have the large displacement six already and swapping to something larger(V8) would be very involved. Various reprogrammed computer chips, forced induction are ways to make more power from the M30 without tearing into it.
Using a lower (higher numerically)gear ratio in the differential is the easiest and most cost effective way to increase acceleration. A 4.10:1 is found in 525 autobox wagons, can be swapped in a few hours and will make you think you have another 50 horsepower. Albeit at the expense of buzzing the motor a bit on the highway.

Anatoly
01-12-2009, 08:42 AM
I own a 1991 535i 5 speed standard. If you are looking for some performance out of your car, heres couple things that i did to my, and I easy can keep up with New 335i 2008 Twin Turbo BMW. I swap my Diff from 3.46 GR to 4.10 Gear Ratio. I Put in Custom K&N air intake, Custom Exhaust, DeNNon Computer Chip,. Just those Couple of thing gave me 302 WBHP (Wheel Base Horse Power) and i Started with 208HP. 96 HP Gain For about $1000 Not Bad I think.

You got any Dyno proof?


To the OP, don't swap the engine, just turbo ur current one. U'll save money + get more power.

RocknRoll
01-12-2009, 10:48 AM
Nothing wrong with the M30 engine. I can Cruise at 230Kms all day(Much faster than anywhere in north America legally) and get away with it. I have 270k on it, no mods, all original. It's one very reliable engine.

bill bmw
01-12-2009, 02:30 PM
wheel base horse power?... what the heck is that? I've got a '91 535.... as Rock says... it's just so sweet stock, I hate to mess with it.

Anatoly
01-12-2009, 05:02 PM
wheel base horse power?... what the heck is that? I've got a '91 535.... as Rock says... it's just so sweet stock, I hate to mess with it.

wbhp is what your car puts to the ground. For example, you can have 400hp to the crank but your wbhp will be 350.

bimmer dot info
01-13-2009, 07:09 AM
WHP is horse power at the wheels.
BHP is basically the same thing.
WBHP is redundant.

http://en.wikipedia.org/wiki/Horsepower

ross1
01-13-2009, 09:01 AM
BHP is brake horse power
A "dyno" is nothing more than a big brake.
BHP can be measured at the wheels or the crank. It is a unit of work performed and cares not where measured from.

bill bmw
01-13-2009, 09:01 AM
so in the splitting-hairs department... I've heard of brake horse power... so "b" stands for brake, not base.

bimmer dot info
01-13-2009, 11:41 AM
Ross is right. That will teach me to believe wiki.

WBHP is not the correct/common term. WHP, RWHP, FWHP, or AWHP are.

billygoat777
01-13-2009, 07:45 PM
. I would imagine this would be a much more difficult swap into a 535i (M20 I6).
Good luck.


The 535i has the m30 not m20.



OP idk much about engine swaps, but turboing seems to be a good way to really increase power, a nice cheap way to wake these engines up is to chip it too.

Anatoly
01-13-2009, 10:43 PM
I still want proof from COSMOS535 tho, that with intake, exhaust and chip he have 302 at the wheels ...