0-100kmh Times

[abg]

I've been doing some testing on my recently purchased auto VZ Commodore to get a base line before I start modifying it. It already has some basic mods, k&n air filter, an exhaust which I think is twin 2.25" into a single 2.5" and extractors as well as a few other things, wheels, lowering springs etc. The car has around 190,000km on it.

Running 0-100kmh tests with a reasonable launch I'm only getting around 9.3 seconds which seems really slow to me, I thought from the factory they were about 7.5 seconds?. This was with about 3/4 tank of 95 on a 29C day.

Has anyone else tested their 0-100kmh times?

 

[alex2_s]

has your k & n air filter oiled up the MAF causing a lean mixture and less power.

 

[trenooo]

was under the impression that you would lose power with a twin 2.25?

 

[kngsv6]

why would a twin 2.25 lose powere?

 

[richardpalinkas]

but he has extractors as well so that should make the times better than stock shouldnt it?

 

[torana355]

175 or 190 motor?? A healthy 175 with the mods you have listed should run in the 8 sec bracket to 100kph. My SV6 with a VCM tune does it in 7 flat with a full audio system.

 

[abg]

Thanks for the replies everyone. It's a 175. I'll check the MAF this morning and may put an LC1 wideband on this afternoon to see how the mixtures look. Have been looking at purchasing the VCM suite to do some tuning too as it seems there are big gains to be made there.

I did the 2 hole mod and a few more runs last night, was seeing around 8.8-9.1s which is a little bit better but still a lot higher than it should be. My launches are a bit inconsistent, revving too high on the stall is causing wheel spin and slower times.

Has anyone else tested their times?

 

[abg]

Did a bit of measuring up today. The headers are made by Advance, 1 3/8" primaries down to a 2 1/4" secondary. These join to a cat on either side which goes to dual 2" pipes which join just before the rear wheels to a single 2.5" pipe then out through a mid size muffler and a small muffler just before the tip. I'm not sure if any of this is still the factory system or not, it does like a bit old and crappy and has press bends. It is fairly loud under any sort of acceleration, too loud for my liking, cruising at a constant speed is fairly quiet.

Does anyone happen to have a photo of the stock system to compare with?

 

[HoldenOnn]

How are you timing your runs. If it is by a hand stopwatch then its not ideal. If you live close to a dragstrip, then this would be ideal to go and utilise their accurate timers.

Just for reference below is a pic. Its not a 175, but it will give you an idea of a 190. Its my totally stock 2004 VZ Calais running BP Ultimate 98 with 3/4 tank of fuel. Gtech Performance Meter was the timing instrument.

0-100 km/h range from 6.99sec - 7.37sec below;

 

[VzVzVz]

I'd love to test my time, but last time i tried around the docks, I got dobbed in by the bloody night workers.