vn proformace

Asked by Nov 19, 2009 at 05:32 AM about the 1989 Holden Commodore

Question type: Car Customization

hi new to fourm can any one tell me if they no of any quick n cheap tricks to make my vn have more balls sit is a v6

5 Answers


have a look at the motor. there is a 90degree bend pipe inbetween the throttle body and the intake manifold.have a look where that bend joins to the intake manifold, there should b a plate plate u can see its about 3mm thick. it is a restriction cone put in for fuel ecconomy and smooth acceleration. if u take that out it will hav a bit more punch off the line. if u do take it off afterwards u will have to bring the revs up to around 3000-3500 for 30secods 2 reset some of the sensors so it will recognise it has been taken out. apart from that ur lookin at things like extractors and exhaust

thanks ill take a look at that exhust is a bit done extractors on the way


get a chip, they on trademe, cheap for what they are


The cone restrictor works well, also take out all your intake piping, box etc... and place a pod filter from the throttle body!!! This works vey well as the VN - VR motors. Otherwise install a cold air induction which will do that same job, just more $$$ If you have a VN, the exhaust manifold is the most restrictive manifold i have ever seen, changing this will help dramatically, followed by a cat back exhaust or full system, you will be able to burn of 5Litres very easily.


Also, get yourself a 5L V8 throttle body, they 5mm bigger than the V6 and help in performance. make sure you give the sensor a good clean before fitting them as when you get them second hand from wreckers, they may be a little dirty. Magna TS 4cyl injectors are a great option also. They perform better than the HSV V8 injectors and are used on the Saloon cars! All this can be purchased from wrecking yard for very little $$$

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