Thread: Diesel gas choice?

Originally Posted by mcrover

I dont mean to throw a spanner in but even though I like diesel gas and I think it is a great mod, you might want to put in some 4.11 gears in the diffs first, it would be a bit cheaper and the performance is a huge jump on standard with 31" to 32"s and is like standard with 35"s as well as pretty good economy but you lose top speed (not really a prob for most Tdi owners anyway).

You could more than likely save around $500 going this way first and if you then still want more power and economy go the gas route and have the best of both worlds with freh diffs to boot.

Just a thought but Im just waiting until the price of the systems comes down a bit (if it ever does) as at the moment, it will take me forever pay back $2500 in fuel savings and the Hp isnt a huge bother to me.

Sorry, should of said. Diffs are already done. I have to admit I was considering going back to the original because I'm getting annoyed at the top speed situation but I can't afford both so gas it is.

As far as savings go... Well, to be honest I'm not expecting much. I never expect to actually pay off what the system is worth in fuel savings. But when I'm riding the clutch and revving the engine as much as I have to from cold to get out the drive I am probably not taking care of parts of the vehicle as best as could be so it may help these situations too which in the future will mean healthier engine which doesn't need parts as often. But, let me say I could be wrong and some reports I hear of serious damage being done could also be a potential situation and then I could be stuffed.

Xav

Thats ok, I was just thinking it may fix your problem if you were only after a small to medium gain.

As far as top speed goes, mine tops out on standard size rubber (28") at 145kmh and with the 235 85 16 (around 31 1/2") Ive had it at 135kmh and still accelerating but didnt want to go any quicker but with the 4.11 on standard tyres it should only lower top speed by 15% or so, so you should still be at around 118kmh on standard tyres but with 31"s it should improve by another (I think without a calulator) improve by around 3 to 5% or something like that so your still with in the "enough to overtake" speed range.

All this could be completely wrong, I have done the math in my head while writing this post so if someone know more accurate numbers or has a calculator to work it out on the go ahead.

Getting back to the gas, I have heard of them blowing head gaskets and the odd burnt out valves and holed pistons but these were stories only, I havnt seen it and a couple of them were from someone who doesnt even like Diesels and thinks I should have a 5L holden boat anchor in my Disco to make it decent so I would go by them.

I dont see why there would be a problem as technically it should be a richer, colder and more complete burn....in practice.....I dont know...

Well, they say it's about an 8 week week so in 10 weeks when I'm asking how to rebuild a tdi you will know not to get the system fitted, lol. Thanks for your help.

Xav