A possible nudge for the VR engine

**MattyT** · 19-02-2009, 11:21 AM

The a/c weighs about 30-40kg doesnt it? Ditching that would make a huge difference.

**mk3pete** · 19-02-2009, 11:36 AM

thats seems a bit excessive maybe 10 to 20 i recently got mine replaced

**glidn** · 19-02-2009, 12:41 PM

Well my last vr6 i had.

Stock standard it made 107.8KW @ the wheels.
After the following

Pod cold air induction
CAT Removed and Resonator after the CAT (so Straight Pipe)
Remus Rear Box.

Car made 112.9KW @ The Wheels.

After this you can do the following.
Under Drive pulley's as recommended
Can see up to approx 3-5KW @ The Wheels
Removal of AC, but personally would not recommend removing a luxury.

Doing the following mods can help the car, if it make a difference in power?
I have no idea.

You can take the throttle body off and give it a good clean. Even remove the water pipes recirculating to the throttlebody. Only thing it does, is make the throttlebody warmer due to hot water constantly on it.
If you look inside the throttlebody you will see to humps in there. Use a die grinder and remove those humps till the throttle boddy is smooth inside.
This has been known to give a much sharper throttle response. So i guess it could change the power delivery in the range.
I never had the chance to do this. I have gotten a VR6 again, so i'll give it a go this time.

Next Mod - The "Euro Plenum" trick. Basically turning intake manifold upside down and you will notice alot of wasted space. People tend to cut the back out and weld a plate from one side to the other so you get a larger intake manifold. Dont forget to clean this out too. It's to mimic the VW Corrado 2.9 VR6 Intake manifold.

Thermal Intake Gasket -
Something else that will help you, it surely does not "really" give you power as such, but what it does it keeps the intake manifold cooler there for better bang with colder denser air. which too can help.

These are only a few things i know off and read about/studied.

Hope this helps your non force inducted ways. lol

But if power os what you are after, than turbo.supercharger kit would have to be the go.

**glidn** · 19-02-2009, 12:45 PM

The reason people warn off the extractors on the vr6, is the cost might see you 1 or even 2kw difference so money can be spend better in other areas.

Something else that comes to mind.

I use to have a friend with a VR6 here too.
He had done the Viper induction kit. Full 2.5" exhaust from headers back and Chip, that saw him 118.7KW@the wheels.

Some food for thought.

**The_Hawk** · 19-02-2009, 02:21 PM

I often wondered if you could custom build your own gear box with shorter Gears 1 to 3 for that extra punch, but normal (or longer) 4th and 5th for economy. Is something like that possible or more importantly practicle?

**Jarred** · 19-02-2009, 02:29 PM

Originally Posted by The_Hawk

I often wondered if you could custom build your own gear box with shorter Gears 1 to 3 for that extra punch, but normal (or longer) 4th and 5th for economy. Is something like that possible or more importantly practicle?

I reckon that's start to get very expesnsive if you started fiddling round with gearbox's, incl. custom/aftermarket gears. esp, if you pay some one to do it all!

If you went too short 3-4 would be a really big jump, and make for poor driving experience imo. & eventually get annoying. let alone resale and having to shift 3 times to get to 40kph in regular driving.

There are plenty of small mods you can do mickey. Things like cleaning up of the throttle body/plates and cleaning the intake mani are good ideas mickey, imo

**Mrk_Mickey** · 19-02-2009, 03:10 PM

Yeah I quite like the idea of cleaning....

I'm doing a bit of an engine overhaul with my next service too; engine flush, coolant system flush and injector/fuel cleaning. Hopefully it'll run nice and smooth and then I'll have a look at the possible cleaning/DIY options.