[Link] How to get Big HP - E34 535

Link: http://member.rivernet.com.au/btaylor/BMWText/technical/E34535BigPower.html

How to get Big HP - E34 535

See also: E28 535 - How to Get Big Power for more comprehensive coverage.

See also: Catalytic Converters, Chip Review (Jim.C) - E28 535, Chip Review (Jim.C) - E34 535i,
Chip Review (Powerchip) + K&N - E34 535, Chip Review (Powerchip) - E28 535,
Differentials - Choosing for Performance, Exhaust System: Metric Mechanic,
Headers - Extractors, How to Chip an E34 Incl. ECU Removal, K&N Filters,
Mass Airflow Sensor (MAF) Conversion - E28, Oils and Engine Power (see item 1).

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Date: Sun, 23 Apr 2000
From: Richard Nott <gis@s054.aone.net.au>
Subject: E34 535i Performance Modifications

The following results are from a Dyno Test on an E34 535i with 3.73 Diff Ratio,
Free Flow Exhaust, K&N Air Filter and a Jim.C. Chip.

The test results:
Maximum HP: Up to 229HP (171kW) from 208HP (155kW)
Maximum Torque: Up to 243lb/ft (332Nm) from 223lb/ft (305Nm)

*Standard Diff Ratios: Manual (3.64), Auto (3.91). ( * In the Australian Market. )

I wouldn't recommend going above the 3.73 in an E34 535i Manual.

The only other modifications you can make, that aren't completelyover thetop
in terms of cost are Schrick Cam and Mass Airflow Sensor (MAF).

The MAF delivers 10hp to the rear wheels of a stock E28 535i. They can
bepurchased from either Modern Performance in West Long Branch, NJ,
on (732) 222-3679 or Split Second. Modern Performance has a box that
sits between the MAF and the cars wiring harness that performs the signal
conversions, so it looks like a standardAirflow Meter to the Motronics.
The Split Second unit is far more complex.It's electronic box mounts inside
the cabin near the driver, so thatthe driver can alter Fuel Delivery parameters
(Low, Medium, High RPM and Acceleration) on the fly. It has an Oxygen
Sensor Display thatalso requires installation for this to work. It is a much
more sophisticatedunit than the Modern Performance system with increased
complexity and cost... and possibly more to go wrong when the unit is a few
years old.

The Schrick Cam delivers a noticeable increase in power, especially above
3000 rpm where the engine seems to come on cam. This is an improvement
over the standard E34 engine which seems to come on cam at 3400 rpm.
And of course, above 4000 rpm's the Cam really makes itself felt.
Unfortunately, no one has been able to show me Dyno Results for an
engine fitted with a Schrick Cam to quantify the power increase, but I'm told
by an engine builder they typically see an extra 10hp at the rear wheels.

Power Chips: Interestingly Powerchip, APE, Bavarian (BAS), BMP and
Jim.C.all claim the same sorts of power results for their engine chips. However,
just abouteveryone will tell you a diff ratio change delivers a more noticeable
result,which seems to indicate that chips really don't do very much. However,
independent car magazine tests have shown a greater than 1 second 0-60
improvement for older cars such as the E28 and E34 535, whereas newer cars
such as the E36 don't get as much benefit, possibly because the factory have done
a better job in this area and therefore there is less room for aftermarket companies
to play with. A recent chip test in European Car showed almost no difference in
0-60 times for the latest cars such as BMW E36's. Only one or two showed a
very small improvement in drivability, such as when overtaking on a highway.

Whats Left: At reasonable cost, not much; a set of extractors ormodification
to the Automatic Transmission to a higher stall Torque Converter.

If that's not enough, and you have money to burn, then look at either an M5
Engine Conversion or Turbocharger installation, or a Turbocharged M5.

Horsepower Chart: 208HP E34 (Incl. Cam + Chip + Maf + Diff + K&N) 248HP E34

BMW Model

Peak Horsepower

Max HP Gain

Peak Torque

Max TorqGain

Rev Limit

Stock

BAS

J.C.

BAS

J.C.

Stock

BAS

J.C.

BAS

J.C.

BAS

J.C.

535E34

208

227

222

43@6250

43@6250

223

242

237

21 @ 2000

6800

+K&N+Diff

230

244

+ Cam*

239

6800

+ MAF*

248

Nott 535

6800

AlpinaB10

254

254@6000

239

239@4000

M5cat E28

256

294

48@6000

243

280

32@5K

7200

M5 E28

282

Copyright ? 1999 Richard Nott

Kilowatt Chart: 155kW E34 (Incl. Cam + Chip + Maf + Diff + K&N) 185kW E34

BMW Model

Peak Kilowatts

Max kW Gain

Peak Torque

Max Torq Gain

Rev Limit

Stock

BAS

J.C.

BAS

J.C.

Stock

BAS

J.C.

BAS

J.C.

BAS

J.C.

535E34

155

169

166

32@6250

32@6250

305

328

321

28 @ 2000

6800

+K&N+Diff

172

330

+ Cam*

178

6800

+ MAF*

185

Nott 535

6800

AlpinaB10

187

187@6000

325

325@4000

M5catE28

191

216

35@6000

329

380

43@5K

7200

M5 E28

210

Copyright ? 1999 Richard Nott

# Cam designates Schrick Camshaft (see specifications below)
# BAS designates Bavarian Autosport. HP same as Powerchip
# J.C. designates Jim Conforti / Turner Motorsport Chip
# Schrick Cam used by Alpina and Hartge
# K&N Filter adds 2kW, 5Nm
# MAF adds 9kW
# Rev Limit Stock E28 535 6100rpm, E34 535 6300rpm
# SAE HP Figures
* Represents an estimate - figure not yet available

Schrick Camshaft (022.01.840-04) for Motronic 2 (9/84-); without fuel pump drive

  Cam Lift      Duration ?CRA      Valve Timing      Valve lift(valve lift)    Intake/Exhaust         ?CRA            at TDC  I/E [mm]       Peak Timing        IO-IC-EO-EC       I/E [mm]   8.7/8.6        284/280/110        32-72-70-30       1.9/1.7(10.9/10.8) 

Recommended Valve Springs: 1985- (056.02.062/022)

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Date: Fri, 30 Jun 2000
From: "ra rabmw" <rabmw@hotmail.com>
Subject: Re: [uuc] Performance upgrades for E34 535i

Mike;
I have used the Bilstein HD/Eibach/750 combination to almost
perfect effect in my E34 535i. But, you and others seem to leave out the other
nesessary part of the suspension; you also should have better swaybars to
balance the car's upgrades properly. I used Racing Dynamics bars, but I hear
the UUC system is excellent.
For added performance, I had a 3.91LSD diff. from a 525iA installed to
replace the stock 3.45LSD, and the loss of about 2/3 mpg on the highway
was more than justified by the drastic increase in acceleration. It meant that
no exhaust, intake, etc. mods were necessary for me. Of course the chip is there.
Since I also spent several weekends at schools, being an instructor
after 20 some years, I upgraded brakes with race-shop gas-slotting and track
pads for weekends, and used R.D.16x7.5" or 17" wheels with race compound
tires. This combination put me just a hair slower than E28 M5's, which my E28
535i "trick" car does eat for breakfast.
For the street, I used the 16x7.5's to great effect, running
225/50/16 BFG VR4's, and could leave the steering wheel "no hands" at 140mph
without even a lane change by the car; it was damn near perfect. It took
off-ramps at 70/80mph.
The combination of Eibach's, and the wheel/tire combination
lowered the car 2"+,but only 1.2" was suspension, and it took any kind of
rough road with ease. And I still had 80% of a nice, normal, comfortable road
ride. The 17" R.D.'s looked awesome on the street, but I liked the ride of the
16" wheels/tires better, they got me many compliments, and could corner with
"M" cars.
This should definitely give you some food for thought. If you want
the 3.91, I know where they hide.
See the UUC guys for exhaust, and check out both Dennis Kirban's
intake (Bavauto has 'em among others), and Jim C's design. They're about the
best I've found. Have fun!

                                o/______\o "RA"/Bob G.                                (Oo=00=oO)                                []=****=[]

> Date: Fri Jun 30
> From: SyringeMan@aol.com
> Subject: [uuc] Performance upgrades for E34 535i
>
> I have just bought a mint '89 535i and, of course, am starting to plan
> upgrades for it. I plan to install a Jim C chip ASAP (great bang for the
> buck in my '94 325i), and replace the front end bushings with those from a
> 750. I am looking for the advice of the list re:
>
> 1)Exhaust systems - I want something throaty but not too loud that might
> add a couple of hp - suggestions?
> 2)Intake - are there any that really help, in terms of power?
> 3)Suspension - Bilstein HDs with Eibach springs? I don't want to lower the
> car more than and inch or so (NJ/NY roads!)
>
> If I plan to upgrade intake/exhaust, should I get a special chip to take
> advantage of these mods?
>
> I plan to do spirited street driving and 2-3 driving schools/year. Thanks
> in advance for your recommendations, and have a great long weekend.
>
> Mike Fox