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Dave0280 View Drop Down
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Points: 17 		Direct Link To This Post Topic: 192 BHP from a 523.....
    Posted: 22-June-2006 at 09:02

I have a 98 523i (2.5) with the M52 engine. The 525i has 192BHP and from what i've heard thisis due to BMW restricting the 523i for insurance purposes. Is it just the smaller throttle body that would need replacing on the 523 to get the extra power or is that far too simplistic  

Anyone done this on their 523i as i want a bit more ooomph

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WestSide View Drop Down
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Points: 17 		Direct Link To This Post Posted: 22-June-2006 at 09:16
throttle body, bigger inlet manifold and a remap, would be what you need.
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stephenperry View Drop Down
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Points: 7213 		Direct Link To This Post Posted: 22-June-2006 at 16:05

is it definately a standard M52 engine, or is it the M52TU ?  They changed for 1998 model year... the TU (Technical Update) has twin-VANOS

If it's the earlier M52 then the inlet manifold from an E36 325i will bolt straight on to release the extra power, if it's a TU engine then it's not possible.

Been discussed many times before in reference to the 3-series (same engine)

    2007 Ford Mondeo 2.0 TDCI Titanium X Auto
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fireblake View Drop Down
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Points: 36 		Direct Link To This Post Posted: 22-June-2006 at 17:12
Hey Dave, let me know how you get on as mines the same and i would love to give her a bit more power?
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fireblake View Drop Down
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Points: 36 		Direct Link To This Post Posted: 22-June-2006 at 17:14
What is twin-VANOS anyway? And how would you find out the engine type????
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Points: 7213 		Direct Link To This Post Posted: 22-June-2006 at 17:26

quote the last 7 digits of the VIN number to a bmw dealer and he'll tell you the engine type, or tell me and i can tell you using the BMW TIS and ETK discs.

twin vanos, as opposed to single works on both intake and exhaust, single vanos only works on intake

its variable camshaft timing, like hondas vtec or rovers vvi and countless clones



Edited by stephenperry

    2007 Ford Mondeo 2.0 TDCI Titanium X Auto
    1983 Ford Sierra XR4i
    2000 Alpina B10 3.3 #118
    1999 BMW 323Ci
    1995 BMW 318i SE
    1994 Vauxhall Omega 2.0 GLS
    1995 Ford Mondeo 1.8 LX
    1990 Honda Concerto 1.6 EX
    1986 Ford Orion 1.6 GL
    1989 Ford Fiesta 1.1 Firefly
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fireblake View Drop Down
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Points: 36 		Direct Link To This Post Posted: 22-June-2006 at 18:03
thanks for that Stephen
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alpina527 View Drop Down
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Points: 68 		Direct Link To This Post Posted: 22-June-2006 at 21:54
The M50 manifold won't bolt straight on. It needs a fair bit of machining doing to the manifold to make all the M52 bits fit.
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brybusa View Drop Down
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Points: 676 		Direct Link To This Post Posted: 23-June-2006 at 08:33

I hope the 523 I had a blast with down the A45 had these modifications done to it, I only just got past it and I have a E34 535...

I couldnt believe how quick it was TBH
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stephenperry View Drop Down
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Points: 7213 		Direct Link To This Post Posted: 23-June-2006 at 16:13

maybe it was a rebadged 540....

    2007 Ford Mondeo 2.0 TDCI Titanium X Auto
    1983 Ford Sierra XR4i
    2000 Alpina B10 3.3 #118
    1999 BMW 323Ci
    1995 BMW 318i SE
    1994 Vauxhall Omega 2.0 GLS
    1995 Ford Mondeo 1.8 LX
    1990 Honda Concerto 1.6 EX
    1986 Ford Orion 1.6 GL
    1989 Ford Fiesta 1.1 Firefly
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bazza190 View Drop Down
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Points: 4 		Direct Link To This Post Posted: 23-June-2006 at 18:33
The Autocar figures for the E39 523i and E34 525i are interesting

                    523i            525i
0-60              8.0              8.7
30-70            8.1               8.5
50-70            11.9             12.1  (done in top gear)
Top speed      137              138

The 525's extra horses won't be bothering me!
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fireblake View Drop Down
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Points: 36 		Direct Link To This Post Posted: 25-June-2006 at 20:48
Anyone have the Torque figures for both cars, i think the 523 must be tuned down for Torque. Which is better for most types of driving anyway
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Points: 7213 		Direct Link To This Post Posted: 25-June-2006 at 20:52

171 bhp and 181 lb ft for the 23

torque is more beneficial than peak power for "real world" driving, this is why modern turbodiesels feel fast - because they have heaps of torque low-down the rev range, although you still need decent bhp otherwise it may feel quick but won't really perform



Edited by stephenperry

    2007 Ford Mondeo 2.0 TDCI Titanium X Auto
    1983 Ford Sierra XR4i
    2000 Alpina B10 3.3 #118
    1999 BMW 323Ci
    1995 BMW 318i SE
    1994 Vauxhall Omega 2.0 GLS
    1995 Ford Mondeo 1.8 LX
    1990 Honda Concerto 1.6 EX
    1986 Ford Orion 1.6 GL
    1989 Ford Fiesta 1.1 Firefly
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bm1. View Drop Down
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Points: 97 		Direct Link To This Post Posted: 26-June-2006 at 00:39

Originally posted by alpina527 alpina527 wrote:

The M50 manifold won't bolt straight on. It needs a fair bit of machining doing to the manifold to make all the M52 bits fit.

Why did they do this....what I mean is....why did they have to bugger about using diffirent manifold's ect, were they trying to make thing's dificult!

Does the Tb bolt on to 523 manifold and if it does what power (if any) would you get.
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brybusa View Drop Down
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Points: 676 		Direct Link To This Post Posted: 26-June-2006 at 15:04

Guys,

Whats the performance stats for the E39 525 please, only ask as the bro is looking at a sport one right now...
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brybusa View Drop Down
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Points: 676 		Direct Link To This Post Posted: 26-June-2006 at 15:06
Originally posted by brybusa brybusa wrote:

Guys,

Whats the performance stats for the E39 525 please, only ask as the bro is looking at a sport one right now...Sport, beige leather 39K miles...FBMWsh....01 plate car...£11,950 private sale...do you think thats a fair price?

Got the link to add now..

http://atsearch.autotrader.co.uk/WWW/cars_search.asp?modelex act=1&lid=search_used_cars_full&make=BMW&model=5 +SERIES&min_pr=11000&max_pr=12000&mileage=&a gerange=&postcode=lu7+3uj&miles=20&max_records=5 0&source=1&photo=1&sort=3&ukca*search_full=S EARCH



Edited by brybusa
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stephenperry View Drop Down
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Points: 7213 		Direct Link To This Post Posted: 26-June-2006 at 16:14

according to parkers guide (www.parkers.co.uk) a 2001 Y-reg 525i Sport (manual) in a private sale is worth £11255, but thats with 50k on the clock so you can add £54 per thousand its under (say 10 x £54 = £540), add on the £540 brings it to £11795, which im sure you'll easily haggle to

yeah, i'd go for that

specifications....

2.5 litre 6-cyl

192 bhp @ 6000 rpm

181 lbft @ 3500rpm

148 mph max

7.8 to 60

group 16 insurance



Edited by stephenperry

    2007 Ford Mondeo 2.0 TDCI Titanium X Auto
    1983 Ford Sierra XR4i
    2000 Alpina B10 3.3 #118
    1999 BMW 323Ci
    1995 BMW 318i SE
    1994 Vauxhall Omega 2.0 GLS
    1995 Ford Mondeo 1.8 LX
    1990 Honda Concerto 1.6 EX
    1986 Ford Orion 1.6 GL
    1989 Ford Fiesta 1.1 Firefly
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stephenperry View Drop Down
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Points: 7213 		Direct Link To This Post Posted: 26-June-2006 at 16:17

compare it side by side with lots of other cars here... (theres even a silly race feature!)

http://www.fastsaloons.com/comparerace.php

    2007 Ford Mondeo 2.0 TDCI Titanium X Auto
    1983 Ford Sierra XR4i
    2000 Alpina B10 3.3 #118
    1999 BMW 323Ci
    1995 BMW 318i SE
    1994 Vauxhall Omega 2.0 GLS
    1995 Ford Mondeo 1.8 LX
    1990 Honda Concerto 1.6 EX
    1986 Ford Orion 1.6 GL
    1989 Ford Fiesta 1.1 Firefly
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alpina527 View Drop Down
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Points: 68 		Direct Link To This Post Posted: 26-June-2006 at 22:09
Originally posted by bm1. bm1. wrote:

Originally posted by alpina527 alpina527 wrote:

The M50 manifold won't bolt straight on. It needs a fair bit of machining doing to the manifold to make all the M52 bits fit.

Why did they do this....what I mean is....why did they have to bugger about using diffirent manifold's ect, were they trying to make thing's dificult!

Does the Tb bolt on to 523 manifold and if it does what power (if any) would you get.

 

Which tb do you mean? The 528 tb is the same as the 523. The M50 is totally different.

The manifolds are different because the M50 is obd1, whereas the M52 is obd2



Edited by alpina527
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