Popular Diesel & Petrol Cylinder Head Conversions Speed & Power Tune ups | Performance Upgrades & Modifications

Popular Cylinder Head Conversions

The cylinder head is the most important area to consider by the serious tuner.

Cylinder heads will always be the key component of performance enhancement packages on any petrol or diesel engines on motor cars, trucks / bakkies, SUVs as well as bikes.

Its design has more bearing on the end result, performance-wise, than any other component of the high-performance engine on petrol & diesel motor cars.



“Jeepers ” A Wrangler that goes!

The Jeep Wrangler is the archetypal compact sports utility vehicle, but in the South African high altitude / high ambient context its overall performance is impaired by two shortcomings – both of which can be addressed by tuning gurus, Steves Auto Clinic…

SAC Jeep 4.0L Wrangler “A Jeep disguised by Power”

The 4.0L Jeep Wrangler models, that share a engine with a few other Jeep’s has been under the development light at SAC.
These vehicles have been popular for conversions over the past few years within the SAC group but given the extremely long gearing the power increase simply wasn’t enough.
Extensive testing has been completed around the Jeep Wrangler. Bigger inlet valves fitted to the cylinder heads and the increased compression ratio and we were happy with the power output…
Mitsubishi Colt 2.8 TDi “SAC’s more grunt per Rand”

SAC engineers gas-flow the engine’s inlet ports, re-profile the camshaft to suit the improved airflow and replace the standard exhaust with a low-pressure free flow system…
The SAC “Battle Cruiser”

6 Cylinder Land-cruiser engines produce plenty of power & torque. All the Land-cruiser wagons and pick-ups are heavy and usually full of accessories so the aero dynamics and weight end up consuming the energy that they produce…


“BIG POWER” Options For Your Toyota Hilux 2.7is

Steve’s Auto Clinic have found the solution for those Toyota Hilux 2,7i drivers desperately searching for V6 levels of performance from the 2700i four-cylinder Hilux.
Traditionally SAC conversions have focused on gasflowing the standard head.
Going the “Big Valve” route has taken the bakkie into a different dimension, providing a genuine 33 percent more power at the wheels than the standard model…
Mitsubishi Colt 2.8 TDi – “No Smoke – More Poke!”

Steve’s Auto Clinic has breathed its magic on a Mitsubishi Colt Rodeo / Pioneer 2.8 turbodiesel — not to increase performance dramatically, but to make the vehicle more drivable and frugal.
The key to unleashing power from the Colt 2,8 engine lies in the cylinder head, and SAC’s research showed that airflow was being restricted on the inlet side, necessitating some changes to the shape of the inlet ports…
SAC VW New Beetle 2,0

The performance of the VW Beetle can be described as nothing more than sedate. Powered by the same 2,0-litre eight-valve engine employed in the VW Golf & Jetta, it has to make do with a humble 85kW of power and 170Nm of torque. Steve’s Auto Clinic recognised that the VW Beetle needs an added bit of get-up-and-go in the performance department in order to match its trendy character…
Volkswagen CitiROX 1.6i

Steves Auto Clinic ROX the Citi with their VW Golf. Volkswagen’s Citi Golf has been one of South Africa’s most popular cars since its humble beginnings back in the late seventies with sales still continuing as strong as ever today some 30 odd years down the road…
Mitsubishi Colt 2.4i – “XTREME MACHINES COLT”

So after reading the SAC ad in our magazine, we decided to take the Colt to Steve’s Auto Clinic to see what sort of improvements they could make.
We were, and still are extremely surprised at what they have achieved.
They took of the head and subsequently also the cam, and sent these two items to SAC Engineering…

Bolt on exhausts

Gone are the days that you take your half a million-rand Bakkie to a corner exhaust shop for a cheap free flow exhaust. It’s fair to say that the bolt-on free flow exhausts of today at SAC have been revolutionized and are becoming more and more popular amongst the enthusiasts. It is no longer just a poorly welded and routed exhaust that rattles and knocks over every bump, it is a properly engineered, big bore, mandrill bent stainless steel-low restriction exhaust system.  It is manufactured in such a way to be a bolt-on fitment in a workshop with very little effort to ensure perfection. Seeing the exhaust system in its raw form, packed and laying on a shelf – it is clear to see that this is an export quality product that will be installed on your vehicle, and it will compliment without any doubt – the performance enhancement plug and play kit and or upgraded intercooler system in many ways – most of all the sound and power will be much improved.  The bolt-on exhaust system is routed along the exact same rout under your vehicle and hangs with similar brackets on the standard rubbers.  The heat protection that has been provided by the manufacturer under your vehicle to protect the undercarriage is still effective and useful with the fitment of these bolt-on exhaust systems. So, if you want the ultimate Bakkie performance enhancement package speak to our sales and service advisors about a bolt-on exhaust system. Contact us today for your free quotation.