Underdrive pulley kit

[pjdm1980]

I did have some problems with short trips but it may have been the battery, I've since replaced it with a yellow top and have had no issues. It charges at 14.0V which I'm told is a bit low.

 

[nickb1993]

How much did u pay for your yellow top optima?
And yeah its suppose to be about 14.4 as a standard across most makes of cars but 14 is dtill plenty

 

[pjdm1980]

There you go-
OPTIMA BATTERY YELLOW TOP 12 VOLT NEW D34 /78 750 CCA DEEP CYCLE AUXILARY | eBay

 

[nickb1993]

And that fits straight in where the standard battery goes?

 

[pjdm1980]

I had to bend a wire on a terminal, move a small fuse box and use the spacer that came with the battery. It was a pretty easy job.

 

[Diesel_junkie]

Not worth the potential head aches complete wank factor.

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[Potta9]

Not worth the potential head aches complete wank factor.

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100% agreed
After going back to standard on mine my engine temps dropped by approx 7deg across the board. I watch my gauges like a hawk so knew straightaway.

 

[GKW]

25% U/D on my cammed L98 and no issues with temp, or voltage / charging, but I've heard similar comments from others too, so not sure why an U/D does or dosn't have this affect from car (talking VE) to another.

 

[ADR 40]

Underdrive kit has been on my VZ for two and half years and travelled a touch over 85,000km, had no problems with it just a new belt change for peace of mind.
(I should point out my mileages covered are in rural-remote areas with around 85% use at highway speeds.)
Another with a BF XR6 Turbo clocked just over 35k with the kit with a mixture of rural & city driving.... same deal no problems. (I could add a couple of VE’s, BA’s, and a Territory to that list)
Apart from a couple of blokes having an upgraded exhaust system, all of our cars are stock sixes.
Not sure why others had problems with the kit, but I reckon contacting that bloke at Mace Engineering would have an answer.