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MGB V8. Power Upgrade's
 MG Roadster with Weber
500
MG Roadster 4.6
conversion
RV8 Optimax Chip
upgrade, (Vac pipe has been sorted)
RV8 Stage 3 Upgrade
MG Upgrade reports
MG Roadster with Weber
500
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MG Roadsteris just one
of many hundreds that benefited from a top-end rebuild,
Mallory ignition, and the Weber 500 Carb system. |
As you can see, it has
no bonnet bulge and still the Weber will fit without severe
problem, giving this Roadster power and efficiency all the
way from 600 to 6000 rpm even at only 3.5 litre capacity.
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Forever a Classic.
 The MG
Roadster |
Classic MG Roadster with RPi 4.6 high torque conversion. |
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A
Classic MG Roadster Completely rebuilt by Cox
& Perry, Norfolk's premier MG Specialists. The potential
of this vehicle is boundless, this Roadster was transformed
into pure driving pleasure with the addition of our 4.6 high
torque V8. Just look out for it in the latest edition of
MG World Magazine.
Described as having Torque
coming out of its wing mirrors, and overtaking is no more
trouble than squeezing the throttle pedal a little harder,
regardless of what gear you are in. |
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It's always a pleasure to provide engines for such
fine Automobiles.
There are no clues to the awesome power of this 4.6 engine,
you don't even need to use its power, the huge 'burble'
of this engine can arouse all, even when cruising the car
park of Sainsburys.
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MG RV8 Optimax
Chip Upgrade.
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MG RV8 Optimax Chip and filter Upgrade. |
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The proud owner of this vehicle
had no idea that the factory-built car could be significantly
improved upon, without even opening the bonnet. Indeed, he
was most amazed at the gains available with such a simple
upgrade (done in minutes) Ref.
MGRV8 - K 400 MGR
Customer Comments
Many thanks for your hospitality
last Thursday, good to see a highly motivated group of people.
Herewith my initial report on the Optimaxed RV8, nothing phenomenal
but the whole transmission and car is improved, and more tractable,
and pick up response is smoother with more torque at lower
RPM. Progression through the gears is smoother and there is
no hesitation which was manifested as a slight clunk in the
final drive on pick up, initial assessment on fuel consumption
is a 10% increase in mpg. I feel (and correct me if I'm wrong)
that a set of flowed shortened and polished trumpets will
improve the breathing, together with improving air intake
to the K&N left of the radiator.
Will you kindly quote for upgrading my inlet manifold with
shortened, flowed and polished trumpets, also the turn round
time. MGB GT V8 (1974) I wish to maintain my cast-iron manifolds,
kindly include your price to match and polish my cylinder
heads to the exhaust manifolds and the inlet manifold. The
engine spec remains as original with SU HIF6 Carbs. Also inform
me of the turn round time for the above.
As we
have said, these improvements are very addictive, I suspect we will be seeing
more of this one soon.
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Another MG RV8
Optimax Chip Upgrade & More.
| This very low mileage MG RV8 has come to us for an Engine upgrade. Before we started, the vehicle was put on a Rolling Road and produced a shade over 184 BHP. (most struggle to get beyond 165). An Optimax chip, however, will bring them all up to 190bhp, and this vehicle is going further with the 285 camshaft and stage 3 unleaded heads. Output figures available soon. |
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Stripping down the stock
3.9 motor reveals that in such a short life, so much is going
wrong already |
The Optimax Chip (to be upgraded to Tornado) is essential to get
the very best from the stage 3 upgrades |
Even at very low mileage the contamination
on the pistons shows that the stock engine is far from efficient. |
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| All's well now. with the Stage
3 heads & Piper 285 Cam. fitted, the next stage is to
go back on the rollers and with the wealth of experience from
Mark Adams, this RV8 will have a dedicated Tornado Chip programmed
on the rollers at Power Engineering in Uxbridge. |
This Filter Mod
allows for better breathing and access to cooler air from
the front. the stock KN filter is very restrictive and not
ideally situated, as it would be drawing warmer air from the
manifolds. Good when cold but a power sapper when hot. |
This vehicle has been re-tested and now produces in excess of 220
bhp, and what's better, it has seemingly endless torque even at
the lowest of rpm. In fact it will pull 5th gear so long as it is
moving.
| MG RV8 PERFORMANCE
UPGRADE |
This article followed from our notification of the Exported MG-RV8.
Having its distributor vacuum pipe connected incorrectly on all
Japanese RV8 re-Imports, almost all throttle response and about
15 bhp of engine power was lost due to this. The correction, however,
took 5 seconds and cost nothing. So tempting many into further upgrades
(MG World April/May 1999)
Feedback
Following the recent report regarding incorrect engine vacuum usage
of the RV8 (MG World April/May 1999). Those V8 chaps at RPi Engineering
have been delving deeper into those locked out efficiency gains
inherent in the stock MG RV8.
For those owners who would like a smoother response, improved torque
and economy I recommend that you contact RPi International Ltd.
in Norwich, its all in there and yet again there is no need for
a single spanner inside your engine.
RPi Engineering have been developing many Eprom (Chips) for all
model Efi Rovers, (ie (TVR, Morgan, Range Rover, Westfield etc)
and now the MG RV8. Unlike most re-chipping, their targets and goals
are somewhat different. Most companies offering ECU Chipping would
only seek to improve/enhance top-end performance (ie. in search
of bigger BHP numbers), and because they always strive to achieve
more than their rivals, this normally only means an increase in
the top-end fuelling where they can claim more BHP. To anyone with
any knowledge of engine fueling it is easy to see that this is indeed
a poor compromise for street use. For most that strive to improve
not only top end bhp but, more importantly, part throttle response
and high torque load areas, 1000-4500rpm is the area that most if
not all power & efficiency gains are actually derived (unless
of course you are racing only).
They say the secret to correct chipping is to place each vehicle
type on a rolling road and with a lap top computer, interrogate
all the engine's fuel, timing & load options, not just a flat-out
revs, but the complete three-dimensional fuel map. This is where
all part throttle and high load driving is taken care of.
And the result
Lower possible emissions not just at idle where the MoT is tested, but throughout the rev and engine load range. Thus producing ultimate economy, efficiency and overall power with smoother power gains throughout. Installation and setting up takes around one hour. Contact Chris Crane on 01603 891209 or e mail: info@v8engines.com for prices and information. The company specializes in Rover V8 engines and has much advice to give on the RV8 including supply of associated spare parts.
Also see the results
of Roger Williams comparison with the Weber and Holley Carbs. 'here'
(Don't forget to use your Browser Back Button to return.
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Disclaimer
Prices do not include local EU.Tax.(VAT).
Prices & stock are subject to change without notice. Information and advice, as always, is free.
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