|The Westfield & other 7's
Page 1 of 
This is a very fine Westfield.
All the way from Germany. It was converted from 3.5 to 4.6
and its performance was transformed. Indeed, it was 'Stunning',
but when you have so much, you just want more.
Destined for a stage 3 upgrade, you can see the customer's
comments at the foot of this page.
While upgrading this car we discovered some very important facts
about how to easily make The Westfield really perform.
Some issues that you can easily
Using a std, Land Rover Discovery chip (fuel map) in a 700
Kilo Car, won't help things, the Optimax or Tornado are a
|Oh that Westfiled
air filter box, It's gotta go.
This picture, may look 'Cryptic', but, we will have more to
say on the subject soon.
Let's just say the plenum mods could have been done better,
you can find more, on this subject on these pages.
Details Of the above. will
be included on our latest 4.0 Westfield, Stage 3 upgrade,
to be added to these pages soon.
Believe, me the performance enhancement will be breathtaking. Check back
Visit our Westfield 'Picture
Gallery' (Click here)
After all, I have gone to all the effort.:-))
Not a Westfield, but it has its advantages.
fine looking vehicle is not actually a Westfield, it is an
F27 and is a very affordable option, built properly
it can offer just as much pleasure.
This particular F27 was built by its owner using many quality
RPi engine components and was brought over for final tuning
and adjustemts. This proved very worthwile indeed as a few
problems became apparent with the cooling and lubrication
system and we managed to find 25 -30% more power in steeing
and configuring it properly.
Westfield 4.3. V8
4.3 Westfield is yet another one no one else could help.
From whence it came it had spent many hours on the Rollers
for testing, and in workshops trying to find the problem.
It produced a very useful 255bhp on the Rolling Road and seemed
perfect. However, when driven on the road, the engine was
always very flat & powerless, and on acceleration from
speed would not pull at all. As you can imagine, this baffled
not only all the engine tuners who had tried, but the owner
The power was perfect on the rollers, yet on the road 80mph
was almost impossible to achieve.
Within seconds of it arriving, we noticed the Webber was fitted
incorrectly (it was on the wrong way round). This caused fuel
starvation when accelerating from speed and of course would
not have been picked up on a rolling road test.
At RPi we don't need rolling roads. Like a good piano tuner
doesn't need a tuning fork.
Well it's fixed now, it goes like a bat out of hell and the
customer is one more happy chappie. The reason it showed good
on the rollers is that there is no inertia when testing a
car this way. Yet, on the road, it was completely starved
of fuel under acceleration.
All in all we had many very happy Westfield owners this week.
Westfield 3.9 with factory
|The 3.9 Injection factory built/fitted engine (and
how to make it work properly)
looking Westfield had spent the last year or so with its owner
wondering why that engine would not run smoothly and why it
was lacking a great deal of power and efficiency. It's got
a superbly built 3.9 EFi, but seemed miles from what should
be expected. As always, we try our best by phone to help,
but after many phone calls and busy spanners, the owner decided
to do the right thing ... he brought it in for us to look
at for him.
It did not take long to see that the EFi Air Flow meter
and filter was mounted incorrectly (a factory compromise
to get it under the hood). This was remedied by the direct
air feed to the plenum, seen above.
You can see more on this subject on the next page. In
this Westfield section.
The distributor was also lacking good spark quality and
was replaced with a Mallory distributor. Once fitted, the
car began to show its true performance. It was now possible
to light the back wheels easily in 1st and 2nd, it would
pull 5th gear all the way from 400rpm to an easy top end
well above 140mph, and throttle response was instant, with
a far smoother idle.
Just an update from my visit to RPi
on the 23-27th of July in my Yellow Westfield Seight.
Well, after driving the car now for about 2 years after building
it and never being totally happy with the way the engine has
run, and after being given all types of useless info from
other people, my Westfield is now amazing to drive. After
my visit to RPi, the engine has never been better, with smooth
running even at 20mph in fifth, and pulls all the way to 100mph+
with masses of power available in every gear. The transformation
was amazing and it feels like a totally different engine,
the drive home to Cleveland was great with the Westfield blasting
down the road and the roar from the exhausts as the accelerator
hits the deck was what made it all worthwhile (4 years from
start to finish), and we made the trip in 4 hours dead.
So after nearly 4 years from starting the dream of owning
a Westfield and 2 years trying to get the Westfield to run
properly, I can say that the car is now finally finished and
I can now start to enjoy the driving experience from her.
Thanks to everyone at RPi for all your help, and I well send
anyone who needs help in your direction. Thanks again
RPi Here is some feed
back that you can put on your site if you wish, regarding the upgrade of
my 3.5 Westfield:
When arriving at RPI and discussing my requirements with Chris,
he told me something very basic. 'If you stick a 3.5 V8 in
a car the size and weight of a Westfield, undoubtedly it will
be quick. This, however, does not mean that all is well.'
The whole purpose of what I was trying to achieve was to spark
some life into the lump beneath the bonnet. I knew it had
potential, however, it seemed to lack that certain 'Turn the
passenger white as a sheet' effect that I was looking for.
As I'm not mechanically minded I was quite impressed with
the experience and knowledge of the whole team at RPI, and
let them do what they do best... Sort it out... And they Did!
I am still not convinced it is actually the same engine that's
in my car. The difference is THAT dramatic. Where have the
flat spots gone?? As well as the performance it also looks
the part. The new rockers and plumbing, although relatively
inexpensive, do make a big difference to the whole appearance
of the engine.
The 2 hour drive home was fairly uneventful (apologies to
the mini driver on the A11), but that was down to over zealous
driving more than anything else (can you blame me), and my
fan sticking on the housing (an old problem) gave me some
grief about 20min into the journey but soon sorted that out.
I asked for power, I got power, if I had asked for it to fly I'm sure they
would have stuck a set of wings on.
On a serious note, I now have the car I thought I was buying
in the first place... and am I happy... what do you think!
Thanks again, Stephen
Dear Chris, sorry for not mailing such a long time but
I was very busy, and also for a few weeks ill, but now I´m
ok. Your Westfield section is very good information for
all WESTFIELD drivers.
Please excuse that I can`t write in my bad
English about the conversion you have done for me. I hope
your German mechanic will translate it for you.
Der Umbau von 3.9 zu 4.6. wurde durch RPI absolut profesionel
durchgeführt. Ich habe sofort bemerkt, daß hier
Leute mit sehr viel Erfahrung arbeiten, so wie sie auf dem
Kontinent nicht in Verbindung mit dem ROVER V Motor zu finden
sind. Das lästige Ruckeln im Schiebebetrieb wurde genauso
behoben, wie auch der vorher hohe Benzinverbrauch nach dem
Umbau verschwunden war. Der 4.6 Motor hat einen wesentlich
besseren Durchzug und hängt durch den gleichzeitig
von RPI montierten K&N Filter auch viel besser am Gas.
Chris Crane und seine Leute sind für mich die absoluten
Spezialisten in Europa für den ROVER V 8. Yes I would
like to have the disc with the pictures you have done.
[The reconstruction from 3.9 to 4.6.
became through RPi absolutely professional. I noted immediately,
here were people with very much experience, so how are they
not to be found on the continent in connection with the
ROVER V8 motor? They removed the jerk in the hill climbing
just as also they had reduced previously high gasoline consumption
after the reconstruction. The 4.6 motor has a substantially
better drive and is simultaneously also much better at the
gas. Chris Crane and his people are for me the absolute
specialists in Europe for the ROVER V 8.]
Chris I´m looking for a new and better
(carbon?) plenum chamber for the WESTFIELD, can you offer
me one? I hope I will see you in 2000 again to talk about
the engine (show you my new air-box and exhaust system)
and perhaps about new stage 2 (3?) heads. I will come with
a small group of German Seven owners to the Stoneleigh Kit-Car
show in May (1–2.May Bank Holiday) happy motoring, Jochen
You can get a translation here.,