quote:

---

Originally posted by Kerry
god i love u

---

quote:

---

Originally posted by CORSA NUT
Drew get your car fixed and let me have a go

Kerry i will get you all that for xmas

---

quote:

---

Originally posted by CORSA NUT
Also these engines are fitted with an extremely heavy flywheel

---

quote:

---

Originally posted by Drew

quote:

---

Originally posted by CORSA NUT
Drew get your car fixed and let me have a go

Kerry i will get you all that for xmas

---

its in now getting fixed

have a bash at donny next year

---

quote:

---

Originally posted by CORSA NUT
V6 Tuning
The GM V6 engines are super-silky smooth and rev like turbines (if allowed) but to be honest they just do not seem to have the 'punch' that you would expect. Extensive nalysis of this problem indicates that these engines have an inherent 'breathing' problem.


Also these engines are fitted with an extremely heavy flywheel; some 15 kgs. This is because the V6 units are marketed world-wide and for some overseas emissions e.g. the USA, in order to comply with these stringent regulations they must have the ability to idle as low as 425 rpm!


However, in Europe we do not require this low idle, so we are able to offer a lightweight flywheel on exchange which has a weight reduction of 7 kgs. This vastly improves the throttle response and greatly enhances the engine's acceleration curve.


Therefore we have developed a range of components aimed specifically at resolving these problems. They are avalable as separate parts or alternatively we have grouped them into several performance packages.


CS10 Package - increase of 15bhp
Remap

Injector Clean

Air box and induction rework

Performance high flow filter
£347 Fitted

CS15 Package - increase of 24bhp
Remap

Injector clean

Air box and induction rework

Performance high flow filter

Reworked high flow throttle body and inlet centre section

4 bar fuel pressure regulator
£835 Fitted

CS15 +Package - increase of 30bhp with lightening throttle response
Remap

Injector clean

Airbox and induction rework

Performance high flow filter

Reworked high flow throttle body and inlet centre section

High flow inlet manifold divider

4 bar fuel pressure regulator

Lightened flywheel (9 kgs reduction)
£1475 Fitted



N.B. Non GSi ST200 owners can benefit further with the addition of a set of Courtenay High Torque Cams
£710 Fitted

Option
Price Fitting
Remap (10-12 bhp increase)
£293.75 Fitted
High torque cams 2.5 (+15 bhp)
£350.00 £360.00
High torque cams 3.0 (+18 bhp)
£350.00 £360.00
Air Box mods
£21.00
Air Filter
£29.95
4 bar fuel pressure regulator
£99.00 £49.50
Throttle Body
£252.00 £145.00
Lightened Flywheel 2.5 (9 kg reduction)
£263.00 Exch £240.00
Lightened Flywheel 3.0 (9 kg reduction)
£395.00 £240.00
Cool Thermostat
£24.50

3.0 into 2.5 Swap
Courtenay can now offer you a 3.0 V6 in exchange for your 2.5 V6 unit. This gives you an instant 40bhp increase, but much more importantly for a road car, it gives the driver a generous 35lb/ft of torque increase and instantaneous throttle response.


This conversion really plays out the old adage "there is no substitute for cubic capacity" ............ fitted from £3750.


Throttle Body
We have a new throttle body conversion for the 2.5 Vectra. The throttle body is supplied on an exchange basis.

The conversion involves the standard throttle body being stripped down. The housing is machined out to accommodate a larger throttle butterfly which is attached to a new low profile spindle, providing a 21.5% increase in throttle area at full throttle. This gives an increase of 6-8 BHP.


Cross Sectional Areas.
Standard Vectra 2.5 Throttle Body 2613mm2
Modified Vectra 2.5 Throttle Body 3178mm2

Price £252 inc VAT.

We can also rework the centre section of the inlet manifold for improved airflow at a cost of £75 (exchange).
Please note we include this in our fitting price on the throttle body conversion


Courtenay-Mantzel Tuning Products



Courtenay-Mantzel V6 Inlet Manifold
Suitable for 2.5 V6 24v (C25XE) 170ps engines as used in Calibra and Cavalier, the Courtenay-Mantzel Powerbox inlet manifold produces an 8 bhp power gain and is priced at £510 including VAT. Fitting and mail order are available at an additional cost.


Courtenay-Mantzel Omega Power Resonator Plenum Chamber
The Courtenay-Mantzel Omega Power Resonator Plenum Chamber is available for Omega 2.5 & 2.6 24v (X25XE) 170ps and Omega 3.0 24v (X30XE) 211ps. The bespoke aluminium casting with its complicated internal design, guides the air into the throttle body in a much more efficient manner. Power increases of between 4 bhp and 14 bhp can be expected, depending upon engine specification. The resonator is priced at £570 including VAT. Fitting and mail order are available at extra cost.

From Courtnay

[Edited on 24-09-2003 by Ian]

---