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Omega General Help / Re: V6 plugs
« on: 22 November 2016, 12:13:40 »
Dont know how to cross reference part numbers haha
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Check state of fob battery holder, and its microswitches.
Vectra/Insignia VXR injectors and regulator will get more fuel in, but good luck getting the ecu to keep up...
You need to get more air in too, or you just get unburnt fuel, washing down the bores. Or filling up the pre-cats and causing flames out the back,,,,circa late 80's touring and rally cars..
I wonder if the next question will ask which hotter/colder/shinier/gimmicky sparkplug is 'better'?
Or which air-filter,, (KN,piper-cross, or big cone strapped to the airflow meter.
No because they're smaller one of the reasons the 2.6/3.2 is marginally less economical...
The stock twin exhaust on my 3.0l is 52mm in diameter. That's pretty big for the 1.5 engine feeding each one! The chance of you liberating 20-30hp with your suggested 'de-restrictions' is very poor. I would actually want to see proof of such restrictions before going any further, all you're likely to do is to change the volume/tone of the exhaust. Getting that much power from an expensive aftermarket cam swap might be realistic on such a small engine.
I have 3.2 manifolds on my car, and they make a small but noticeable improvement to how the quickly the engine revs over 3500rpm, but I doubt there is any measurable extra power from them. I fitted them because they became available at a low price just before I lifted the heads to replace blown gaskets; having done that, the cost/benefit/hassle ratio doesn't justify the hassle of fitting them on their own.
The V6 is a carefully designed modern engine, made using high quality castings and machining techniques: most of the traditional porting procedures are redundant as there are no misaligned bores, steps, large valve guides, massive single-angle valve seats etc. Even the manifolds and plenum match effectively, so any improvements are likely to be small and come at the cost of of proper, time consuming development rather than the quick skim with a die grinder that makes such a difference to Mini engines(for example).
I would expect a fully developed 3.2 V6 with individual throttle bodies to make well over 300bhp, but with a ball-park cost of about £5000 it's never going to be cost-effective. Nor is it likely to be the sort onengine that would suit an Omega.