Mr Footlong

iTrader: (7)

Sorry for the garbled title but basically the car is at Len's from Saturday do have a load of stuff fitted and then on the following Saturday I pick car up and go to Mr Rawle for another remap. I have been using V Power/Optimax ever since it came out with Millers Octane + as well without fail.

Since it is a pain in the butt for me to get V Power where I am, the tank is being emptied as much as poss and I will have Tesco 99 in there for the remapping and from then onwards. I am umming and ahhing about whether to keep using Octane + as well or not. Will I benefit at all by continuing to use it along with the Tesco 99 after the remap or just go cold turkey and get her mapped without it and stop using it? Will performance be affected by anything noticeable and will I risk decreasing any reliability?

Hope that makes sense, it would be a bonus to not have to keep buying the stuff but if it will help things then I will keep using it.

Cheers,

Nick.

JohnD

iTrader: (5)

Have it mapped on your chosen fuel as long as that's regularly available. DON'T use octane booster. Only use this as safety margin when the best fuel is not available.
JohnD

Mr Footlong

iTrader: (7)

I was considering that and just keeping an emergency bottle in the rear wing. Other replies appreciated as well please .

Also, does the classic Imprez have any kind of anti-syphon device in the petrol tank? I have a good half tank of v power/booster still in the car currently but she won't be driveable until at least tomorrow evening and I don't fancy pointlessly driving around in the dark, unable to boot it to burn the fuel off quickly due to parts already added .

GazTheHat

I had the Octane booster mapped in, made a +20bhp/20lb difference. (NF 3ml p/l)

If you're used to putting it in anyway, and don't mind the extra cost, then why not?!?!

Tidgy

bear in mind though if you run out you have to leave the car were it runs low on fuel due to not being able to put booster in.

put the 99 in if thats what you want to run it on, then if you want to add booster anyway as and wehn you fill up, but do it after the map, not for the map.

banny sti

iTrader: (68)

As long as you dont drive it hard without booster, it will be ok to get it home.

Banny

Mr Footlong

iTrader: (7)

I literally never run below 1/4 tank as I have no idea what range is left after that and would rather not risk any potential fuel starvation under load. Why would you not have the car mapped without the booster in if you intended to use booster with each tank? Doesn't make sense to me.

Tidgy

its a what if senario.

if you can't fill it up for some reason then your scuppered, say for example when that depot went up and you couldn't get vpower for love nor money, at the time 99 wasn't around localy to me, and since my car was mapped on vpower and i had no booster at home then i had to take if off the road for two weeks.

if you mapp it with added booster and you can't get high ron stuff then you can't just chuck 95 and booster in, which you can do if just mapped on 99 or optimax. so you'd have to park it up till the fuel came back

if that makes sence,,, lol

banny sti

iTrader: (68)

Better off mapping for methanol if you are going to hassle of using octane booster bottles imho tidgy that does make sense lol

Banny

Mr Footlong

iTrader: (7)

Thing is that I car share a lot so if there were fuel shortages that wouldn't be a problem. I don't go off 'adventuring' much so normally have a good idea of where petrol stations are and always have the 1/4 in reserve.

So, focusing back on the original question and not the 'what if'? .

Cheers,

Nick.

P.S Someone put me out of my misery regarding the tank and anti syphon or not

The Hoff

iTrader: (5)

Hey Nick,

To get the fuel out of my tank if required I pull off the hose that feeds the fuel filter in the engine bay. Pipe it to a can on the floor and just keep primeing the fuel rails on the ignition. Pumps it out a good'un!

As for the fuel additive..... Personally I dont get mine mapped with booster as I dont want the extra expense and hassle of putting it in everytime. If you really want that little bit extra power then go for it but you can only pootle about if you cannot get the fuel/booster you need.

GazTheHat

You're used to it, know what it's about, car has light use etc, all those add up to leaving as is, with booster to me.

The car gets used so little, and keep 1-2 bottles in the boot anyway. It's not hard and you get a nice little bonus for using it.

Mr Footlong

iTrader: (7)

Hoff, I tried the priming thing on my beast and it flat out would not pump out, pump did it's usual thing on igniton for a sec or 2 and stopped, but I actually did it from the hose joining on to the injector rail, on the 'out' from the filter as it was easier to get it off. I don't think there is anything in the filter that could stop it and Len didn't think it would work either, strange that it does for you.

Len is normally fairly easy going and his advice is always good. When I mentioned to him my intention to go from V Power to 99 he indicated fairly strongly for him that unless it was a real pain in the butt to get V Power, stick with it. He has always done well by me over the years so gonna go with that and just knock out the octane booster. I will go with the what if scenario and keep a bottle in the boot.

cheers guys .

jasonius

iTrader: (1)

Just remember you'll need at least 2 tank fulls of straight fuel through before the remap as there WILL be residual OB in the fuel system..!

Your mapper can possibly take this into account, however there's a fair amount of guess work involved and therefore not ideal..!

Bob Rawle

If I map a car for V Power then you can put Tesco 99 in without fear, so that means either or, you won't get all the fuel out by siphoning, you need to pump out but look underneath, there may be a drain plug there, if so then use that to empty, other thing is to drive till it runs out and carry a 20 litre jerry can to fill up with of the correct fuel. Halford sell these cans. Running it dry won't hurt it.

bob

Mr Footlong

iTrader: (7)

You know what, I did contemplate running it dry but since I never go below 1/4 I had no idea how long that would take and drove the car for the first time in 7 weeks yesterday. I will ask Len if there is a plug when he is under the car and to drain if so.

Bob, as a side note and to save me sending a PM, please send me the address details for Saturday afternoon, thanks .

Cheers,

Nick .

P.S It was sooooo hard going easy on the way over to Len's today. I stayed below about 0.2 BAR for most of the journey but after stopping and waiting for 2 mins for darling to catch me up and then see a 306XR overtake me, another car and a transit towing a caravan I got red mist and commited to the slowest overtake I have ever done at about 0.8 BAR lol. Sorry, 2 bottles of champagne will make me talk even more sh1te than usual .

MartynJ

LMAO....Not being able to fill up with your chosen fuel or running out of booster doesn't mean you can't drive your car....It is unlikely to take offence and throw the towel in on your way to work (Unless your name is Lewis Hamilton of course )....
If after you have it mapped for 99 or V-Power and you need to chuck something else in to get you to your next fill up just TRY DRIVING WITHIN THE SPEED LIMIT....
My own car only gets treated to the good stuff if I am going out to play , no point spending the extra money to sit in traffic at 60mph all the way to work..

Mr Footlong

iTrader: (7)

I am lucky enough to not have to sit in traffic the vast majority of the time and I merely prefer keeping things like what fuel at a constant if I have it set up for that fuel .

harvey

iTrader: (48)

Present your car for mapping with the fuel or mix you intend to run on an on going basis. (plus octane booster if you plan to run that permanently)
Millar's Octane Plus has very little effect in my experience and from the label on the Octane Plus bottle I think it adds a few octane points ie. .2 or .3 octane.
Millar's CVL does have an effect but is added at the rate of 1 bottle per 20 litres. Very expensive.
Nitrous Formula at only 1ml per litre has a noticable effect and is more cost effective. I use it at nearly 2mls/litre in several cars and they are all mapped to that fuel mix.
On odd occassions I have had to run on 95 RON. No problem just ensure you only use relatively light throttle. With a knock link fitted expect to see a little bit more active greens but stay light on the throttle.
I ran out of Optimax while touring Northern Scotland, around Wick, in a highly tuned STi6 Wagon that was mapped on + 2ml/litre NF. No problem. On 95 RON it was easy to drive all the way round the North cape to Ullapool and refuel again with 95 RON before getting V-Power south of Loch Lomond.
No need to take the car off the road.