dij

I am just interested to know if anyone has had there scooby remapped on 95 ron fuel or perhaps something else other than optimax?

I am considering getting it remapped on 95 so that I can use almost any fuel without the worry of det.My misses drives the car and I dont expect her to be hunting for a shell station whilst the fuel lights on and the kids crying in the back,and it would be nice if you could just fill up on whatever fuel is available at the service station that nature has called you to.

If any one has tried this,I would like to know what your comments are,ie is there still a noticable difference in power,does it run better when you put in a higher grade of fuel etc.

I expect most if not all have had remaps on OM or other 97ron,but I would be interested to know if mapping on 95 would would have any gains over standard map.
Just a thought (ATM)

Midlife......

iTrader: (2)

I thought Bob had sorted your re-map

http://bbs.scoobynet.co.uk/showthrea...4&page=3&pp=20

stevebt

iTrader: (8)

you can map on poor quality fuels but why, its easier to carry a £14 bottle of NF in the boot of your car just in case you have to put 95 ron fuel in mapping on poorer fuel and running your car to extreme is bound to increase its risk of detonation , if it isnt why does every single company on this earth say you have to put better quality fuel in plus the power will be a lower , is the extra pennies on fuel really worth a new engine

DreXeL

I agree with stevebt, just carry some bottles of Octane Booster in the boot.

TopBanana

If you want to get it mapped to 95RON fuel then there's nothing stopping you and you won't be increasing the risk of engine damage.

dij

Not yet

I have decided to get a few little mods (decat dp,back box,and air filter) before the remap/fine tuning,so that I can take further advantage of Bobs offer.

dij

Thanks for the replies guys.

I do have OB,but thats not the point,I just dont want the extra hassle of looking for particular petrol stations every time the gauge is near empty (happens quite often),or the worry that the batch of fuel might not be good and getting extra activity on the KL.

I agrea that carrying a bottle of OB is wise and I always do,but I do miss having a car that dosent require extra attention to filling up.Its a little annoying that you could put in the best quality fuel that the uk has to offer (supposedly Shell OM) and still have to watch the KL,and sometimes have to add OB (another £3) to the tank.

If a lower grade of fuel just affected performance (as most people without scoobies beleive) then there wouldnt be a need to worry.As mentioned above,the engine rebuild cost is the biggest worry and knowing that fuel could cause it is very annoying.

I take it most people have not remapped with 95 then?
I was just hoping that the safety margin could be increased by mapping on 95,then using 97/8,and keeping the OB as a last resort incase you cant stop the KL from lighting (for whatever reason).

Sorry to go on a bit,but my question is/was,if the car is mapped on 95 with a decat exhaust and aftermarket filter,would the overall performance be affected greatly compared to mapping on 98?

I take it that the map would be less agressive,but would it be safer,especialy if you are then using SUL as an every day fuel?
Would the use of a higher octane fuel (than that which the car is mapped on) mean that the performance would stay the same and it would just be safer or would there be a little more performance aswell?

Thanks for tsaking the time to read this.

stevebt

iTrader: (8)

the safety margin would not be increased, as you are mapping on a lower grade fuel

to make an engine safe you have to use better quality fuels and better quality spark plugs etc , etc, if you are mapping for poor quality fuel before you start IMO your on the road to an engine rebuild

i have blew a mapped engine before ( not subaru) and when it was in the garage, they blamed poor fuel and poor spark plugs as a contributing factor if you want to map a car on 95 ron do it but for the sake of a few £££ i think IMO your asking for an engine rebuild

TopBanana

If the engine is mapped to 95RON and isn't detonating, how is the fuel going to cause damage?

dij

So what do you have to say about Topbanana's comment?
[If you want to get it mapped to 95RON fuel then there's nothing stopping you and you won't be increasing the risk of engine damage.]


I was uder the impression that when it is mapped,the mapper listens for det as he increases the 'agressiveness' of the map (please excuse the term),this would mean that 95 would give you det before 97 and the map would be retarded to suit the lower grade fuel.If after this you where to use a higher octane fuel (or add OB) then the dont you think it would be safer?

You seem to be pretty sure that remapping on 95 is heading for trouble,what I dont inderstand is,if this is the case,then how can a JDM car (100 ron map) become safer when its remapped on 97?

Please explain how this would be on the road to an engine rebuild?
Is there something other than DET that poorer quality fuels will increase?

stevebt

iTrader: (8)

to be honest ive seen this persons thread when had his ecu mapped by bob rawle , and from this thread and reading the other thread this person is an engine rebuild waiting to happen


plus if you can map for poorer fuels why do so many jap engines blow up , this persons runs a link ecu with mods from what ive read and wants to run the car on 95 ron plus from what ive read its an sti 5

top bananna

are you trying to tell me his car will be safe/ you would run your car on 95 ron fuel

micared

Surely the point of actually mapping the car to suit 95 ron keeps the safety margin the same, regardless of the relative quality of the fuel used. That's what mapping the car to a specific fuel grade sets out to achieve. Just means the car won't give the same performance as it would if mapped for optimax. As dij says, when the jap models are remapped from 100 to 98 or 97, it doesn't make them more unreliable.

stevebt

iTrader: (8)

well why dont we ask "neilo" about that as im sure he can use 97 ron without any problems

dij

[QUOTE=stevebt]to be honest ive seen this persons thread when had his ecu mapped by bob rawle , and from this thread and reading the other thread this person is an engine rebuild waiting to happen

[So this is your technical explenation to the question right?]

plus if you can map for poorer fuels why do so many jap engines blow up , this persons runs a link ecu with mods from what ive read and wants to run the car on 95 ron plus from what ive read its an sti 5

[ERRR??

Ok fair enough,I dont expect you to pay 100% attention to all the details, but youre getting it wrong,The car is not STi 5,and I am not yet running mods with the link ecu,but will in the near future.
Also,if you read propperly you will see that Im not intending to use 95 as an every day fuel.

When you say Jap engines blow up,are you refering to the subaru engines,JDM subaru engines,or all jap?
Are you saying that a remapped JDM(orignally 100% ron) scooby will blow up ?
Please clarify your statement above. ]

It seems that you think there will not be a larger safety margin in this method,but you still havent explained How?
Instead,you have come out with other crap and not even bothered to understand the question.

BTW,what was remapped engine that blew up with you?

micared

Sorry, can't make any sense of your last post, stevebt.

dij

Exactly my point.

How?

Not being sarcy,I realy would like to know.(please)

dij

?????

WTF??

please explain

stevebt

iTrader: (8)

i mistook you for someone who new "neilo"

dij

running/ mapping an engine to its extreme and running on 95 ron is bad IMHO as ive said the same on my other replies if it is safe to do so without any worry of detenation , let all the mappers say now and i will shut up

IMO there is no safety margin mapping a car in 95 ron, if any i would say its worse , buty what do i know

map your car in what ever you feel safe

dij

[QUOTE=micared]Surely the point of actually mapping the car to suit 95 ron keeps the safety margin the same.Just means the car won't give the same performance as it would if mapped for optimax.QUOTE]

This is what I was thinking myself.
Just wondering if this has been done or is at all practical.
I dont think it has,coz most seem to want the extra power and to run it as close to max power as possible and keep a bottle of OB in the boot for safety.

Micared, I agree that there will be less performance gains(obviously not going to know how much),but do you think that a car mapped on 95 but run on OM or SUL should have a lesser need to use OB in order to stop the engine from ****ting itself?




BTW,how are you getting on with the ic/y pipe?

stevebt

iTrader: (8)

[QUOTE=dij]

PMSL

cmon one minute your slating me then the next your agreeing with me

dij

Thanks for all the high tech info Stevebt.


IMO,mappers map the car to whatever the fuel in the tank on the day will allow them to,after this, if you use a lesser grade then you will be risking det,and a higher grade will decrease the chance of det.

Is this correct?

If so then,would increasing the octane even higher increase the performance, or have any other bennefits (apart from making it even more safer). ??

stevebt

iTrader: (8)

the higher the octane rating the safer your engine will be touch wood

dij

?? I didnt agree with you on anything........did I?

dij

Oh good

But will there be any more power?

Just to clarify,if you put a bottle of NF into your car,would it make it faster aswell as safer,or just safer?

stevebt

iTrader: (8)

mapping a car with NF is bad as you will have to run NF in every tank


mapping a car with optimax is good as you get good power delivery and the engine is safe from being mapped with more power and being safer due to better quality fuel carrying a bottle of nf in the boot is good in case you cant get optimax , that way you can get the 95 ron fuel to nearly optimax and drive your car with no problems

dij

Thanks for the help,good man.

stevebt

iTrader: (8)

pmsl

i got there in the end

Andy.F

If the engine is mapped to a particular octane of fuel then the safety margin will remain as determined by the mapper, as long as the same fuel is used. This is regardless of octane.
The higher the octane then the higher the potential for power for the same boost level.(talking about 95-100ron range)
Assuming the engine, turbo, intercooler and fuel system are capable of supporting increased boost, then it is possible to make as much or even more power than standard, even when running 95 octane fuel.
To answer dij's question, it is possible to make std Sti power, using 95 octane fuel, whilst still retaining an acceptable safety margin. The engine will however be running more boost to do this. Subsequently using 97/98 octane fuel on this set up would further increase the safety margin. Power would not change unless the car was remapped to take advantage of the increased octane.

Andy

micared

Sorry, went to bed before this had run its course, bloody knackered all the time these days! .Dij, haven't even been into the garage since we last spoke, except to let a potential purchaser look at the Corrado.....looks like he's serious as well, so gonna be tears soon! I'll be in touch about that part/parts as soon as I've finished work on my in-laws new place, hopefully soon after next weekend if all goes to plan. Keep in touch.

dij

(Sigh of releif)

Thanks for the propper explanation Andy.

So its all a matter of personal prefferance,I can take advantage of the higher octane fuel by mapping on this,have more power and still have a safe map,or sacrifice some power for a greater safety margin.

I just wont know how much power Im sacrificing unless I can do a back to back comparison with two seperate mapping sessions using both types of fuel.
Very unlikely that I will do this.

Oh well, did get there in the end,just took a while for the right person to answer.

Thanks.