Fuel Question

[DezertEagle]

My car has been pinging a fair bit, like anything past 4,000rpm even!

Its a 1994 R33

- 3" Custom cat back exhaust

- Pod filter

- NGK iridium plugs (note: it was pinging before I put these in)

So I decided to put on a hybrid front mount and im getting a Walbro 550hp fuel pump, does anyone think these mods are suitable? Or just 'useless' mods so to say.

Thanks in advance.

[carlo]

The car should not ping like that.. especially in winter!

The fuel pump might help, but I would say get your MAP and Airflow meters checked out.

[JimX]

Back off your timing. The previous owner probably tried advancing it for some extra power. Set it to 15-17 degrees.

[meshmesh]

Don't laugh guys, but the boys from OWS oils have given me a Fuel Catalyst to try, and this is claimed to do a number of things.

1. Reduce Pinging by increase the octane in the fuel

2. Reduce exhaust temps by half

3. Increase fuel economy

4. Allow you to advance timing

5. Increase throttle response

This unit is also claimed to be used by ProDrive UK in there Suby's and the Rally Cars.

I've had it in the car for about 5days now, and we'll be putting it on the dyno with the week to check the results.. However so far, I've noticed a few things:

1. Throttle response seems better

2. Via my Apexi Power FC Hand Controller, my Knock levels are definately down by as much as 15points in some cases.

3. I'm no tech wiz, but I think it also leans out the fuel :confused: if this is true why are my Knock levels down?

4. My GTR runs pretty rich, and my muffler sits a little close to the rear bumper, after a week I usually have to clean it close my white bumper turns cloudy. So far, my bumper isn't half as bad as it normally would be.

5. Fuel savings... I normally get between 16-17ltr/100km, yesterday I filled up & got an average of 15ltr/100k?? Same routine driving, so nothing out of the norm.

Don't take my word for it until we throw it on the dyno, but so far things look good. Maybe this could help your pinging issues "along with many other things eg: timing, boost etc", especially if you have bad fuel in your area.

[B-Man]

MEsh - what is the stuff called and where do you get it ?

[Jimbo2000]

is this like those physical tube things that you actually place in your tank or an additive?

[JimX]

I'm not saying that mesh's fuel catalyst is a dud, but I tried a fuel catalyst called a Triple Charger and it didn't do anything. I hooked it up when I started using Oil Extreme in my Commodore so I thought it was responsible for some of the extra power and economy. Then when I swapped cars, I tried it without the Oil Extreme because I had been turned off oil additives by that stage. After about 5 tanks I realised that the catalyst had done absolutely nothing so I took it out.

Lately after I put the Oil Extreme in, I found that I got virtually the same extra fuel economy that I got on the Commodore when I had both items hooked up. So I'm thinking that the Oil Extreme was entirely responsible for all the extra power and economy I got.

I dunno, I'm just wary of magical devices. Even additives I'm sceptical of, but I think that it's more likely to do something because you replace it every service, rather than some magical box that sits in your fuel line indefinitely. I would have more faith in the catalysts that you throw in your tank that slowly disolve and you replace after time, rather than those that last forever.

Edit: Mesh - If your catalyst is working as advertised, it's not actually leaning out your fuel but atomising it better. Therefore you will get a more complete burn, which will give you less black smoke thus giving the illusion that it's leaning out. But it's just burning properly, so your knock levels will be down.

[meshmesh]

B-Man: I got it from OWS Oils the cost is about $450-500, I think their website is www.ows.com.au The product is Broquet Boostmaster "their website is www.broquet.co.uk

Jimbo2000: Yes there are a few types, one has "magic steel balls" that sit in your tank, or the one I have the B40 "Steel tube about 25cm long" that sits in my fuel line, after the fuel filter in my engine bay.

Edit: Mesh - If your catalyst is working as advertised, it's not actually leaning out your fuel but atomising it better. Therefore you will get a more complete burn, which will give you less black smoke thus giving the illusion that it's leaning out. But it's just burning properly, so your knock levels will be down.

That makes sense..

I filled up again yesterday and got an average of 16ltr/100km.. so the fuel consumption may be down a little, but nothing dramatic. I guess what I'm looking for is not so much fuel ecomony, it's the claimed alternative/similararity to "Water/Methanol Injection" and being able to safely advance timing by the reduce knock levels and better fuel levels. I am starting to think that perhaps the model they have given me is too small for my application seeing the GTR is pushing 500+hp at the motor. The next model up is called the "Top Fuel" which is nearly as big as a Catch Can and cost around $1000... at that price i ca't see it being a good buy $ for performance value.

I've spoken to a few techs about the product, and they said it pretty much does what JimX said, how it's magnetise's the fuel taking out things that shouldn't be there etc etc..

I'll keep you all updated once it goes on the dyno.