Where to learn?
02 November 2016, 04:26 PM
#31
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I have a few maps saved while trialling quicker spool. I'm not sure if they will let me flash between runs though as its a £35 offer so I assume they want you on and off relatively quickly. (But I could be wrong). I did ask on the phone if I can sit in the car and log data and they were happy with that 
I have been mapping the car on 98 Shell V Power but will fill up with Tesco Momentum 99 for the dyno. That should help a bit I think.
I have been mapping the car on 98 Shell V Power but will fill up with Tesco Momentum 99 for the dyno. That should help a bit I think.
02 November 2016, 07:08 PM
#33
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I personally really like momentum. Never had a problem with it and it's an octane higher than shell. But they are both good and I use both
02 November 2016, 07:24 PM
#35
Mine is fine on momentum at circa 600bhp.
It was originally tuned for 98 Ron in Australia I brought the car back with me last month.
Will get it checked for UK fuelling at some point. I've had to take out some wastegate duty as I was hitting boost cut at 1.9bar on Momentum. Im putting that down to the colder weather though.
It was originally tuned for 98 Ron in Australia I brought the car back with me last month.
Will get it checked for UK fuelling at some point. I've had to take out some wastegate duty as I was hitting boost cut at 1.9bar on Momentum. Im putting that down to the colder weather though.
02 November 2016, 07:32 PM
#36
Mine is fine on momentum at circa 600bhp.
It was originally tuned for 98 Ron in Australia I brought the car back with me last month.
Will get it checked for UK fuelling at some point. I've had to take out some wastegate duty as I was hitting boost cut at 1.9bar on Momentum. Im putting that down to the colder weather though.
It was originally tuned for 98 Ron in Australia I brought the car back with me last month.
Will get it checked for UK fuelling at some point. I've had to take out some wastegate duty as I was hitting boost cut at 1.9bar on Momentum. Im putting that down to the colder weather though.
I have had mine mapped mine on v power and momentum, with and without meth and peaking over 2 bar some days.
It runs perfectly on both at over 500hp and has done for years. Cant notice any difference in performance
02 November 2016, 08:53 PM
#37
Mine on momentum runs lean , Dets and does about 20 less miles for the same amount even when it was cheaper than vpower
I guess that's why we all have different maps lol
Vpower round here is God , mates with merc compressors even notice better performance over tesco momentum
I guess that's why we all have different maps lol
Vpower round here is God , mates with merc compressors even notice better performance over tesco momentum
02 November 2016, 09:03 PM
#38
As an example at 2800 I am running around 23.5 degrees of timing with low - mid 12 AFR. So a bit richer than you. I did try running 13s but I found 12s better. I am at 0.6 bar of boost by this point. I booked myself on a dyno next week so interested to see how much power I have
I chose not to map the factory ecu and run a megasquirt standalone instead.
02 November 2016, 09:05 PM
#39
Mine on momentum runs lean , Dets and does about 20 less miles for the same amount even when it was cheaper than vpower
I guess that's why we all have different maps lol
Vpower round here is God , mates with merc compressors even notice better performance over tesco momentum
I guess that's why we all have different maps lol
Vpower round here is God , mates with merc compressors even notice better performance over tesco momentum
I take it you do not run a flex fuel sensor?
02 November 2016, 09:22 PM
#40
Mine on momentum runs lean , Dets and does about 20 less miles for the same amount even when it was cheaper than vpower
I guess that's why we all have different maps lol
Vpower round here is God , mates with merc compressors even notice better performance over tesco momentum
I guess that's why we all have different maps lol
Vpower round here is God , mates with merc compressors even notice better performance over tesco momentum
Maybe your map needs a tweak? If Daz's car can run on both surely yours should....
02 November 2016, 09:37 PM
#41
02 November 2016, 09:51 PM
#44
Petrol sold in the UK must conform to BS EN 288 British Standards. This allows up to 5% ethanol in petrol.
So if they are putting 7% in that ks against the law...
Tesco claim 4.8% ethanol content, where as shell claim 5%
02 November 2016, 10:04 PM
#45
Of course mine can run on momentum , it requires a hell of richening up on the fuel table and injector scaling richening
I prefer the results from vpower
02 November 2016, 10:07 PM
#46
02 November 2016, 10:07 PM
#47
I am just reporting the facts! What does your petrol measure?
02 November 2016, 10:36 PM
#49
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boosted, what is the specification of your ethanol content sensor and any frequency to voltage circuit in between it and the ECU? Is it calibrated and could it be reading higher due to moisture? If you read 7% ethanol content and have no correction in your mapping from it, do you have a higher fuel trim?
03 November 2016, 09:50 AM
#50
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I think we are getting a bit off topic here guys, on a final note though, like I have mentioned, I find tesco momentum absolutely fine, mapped my own car on V Power, then when I was happy with it, I switched to momentum, the logs show the same timing, same boost levels, afr and the car feels just as fast. Only difference is Momentum is about 10p a litre cheaper around here!
Anyway, my plan after my dyno run is to try out different mods to get use to mapping different things. Going to fit a 3 port, then possibly a decat downpipe. Then hit the dyno again to see what difference those mods make.
Anyway, my plan after my dyno run is to try out different mods to get use to mapping different things. Going to fit a 3 port, then possibly a decat downpipe. Then hit the dyno again to see what difference those mods make.
Last edited by supersai101; 03 November 2016 at 11:08 AM.
03 November 2016, 05:13 PM
#51
boosted, what is the specification of your ethanol content sensor and any frequency to voltage circuit in between it and the ECU? Is it calibrated and could it be reading higher due to moisture? If you read 7% ethanol content and have no correction in your mapping from it, do you have a higher fuel trim?
It shows normal petrol as 4% ethanol so I believe it to be fairly accurate.
09 November 2016, 10:38 AM
#52
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thought i would try lean spool again, I learned out the AFR more than I did last time and also added more timing than last time and result! At 3200 rpm I managed to consistently get an extra 0.1 bar + of boost lol. Doesn't sound much but you can definitely feel the difference!
09 November 2016, 10:43 AM
#53
Congrats, but its probably down to you advancing the timing rather than leaning the AFR`s, when you lean the AFR`s for quicker spool you are meant to retard timing not advance
just check your not getting any DET if you have leaned AFR`s and advanced timing coming onto boost.
just check your not getting any DET if you have leaned AFR`s and advanced timing coming onto boost.
09 November 2016, 11:13 AM
#54
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quite possibly true, but my current setup feels much better than less timing with more fuel and also less timing and less fuel. Kept a very close eye on knock and it's all good even with leaner AFR and more timing. I have read a lot of people saying to tune for torque not faster spool and I think I agree, the other methods I tried feel laggy, my current setup makes the car feel much more responsive.
09 November 2016, 12:58 PM
#55
quite possibly true, but my current setup feels much better than less timing with more fuel and also less timing and less fuel. Kept a very close eye on knock and it's all good even with leaner AFR and more timing. I have read a lot of people saying to tune for torque not faster spool and I think I agree, the other methods I tried feel laggy, my current setup makes the car feel much more responsive.
09 November 2016, 01:13 PM
#56
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That sounds close to my current afr
Yeah timing makes the most noticable gains. But I was running very rich down low before. Like low 12s. By leaning the afr I find it better. Probably the hotter Egt helping a bit.
Yeah timing makes the most noticable gains. But I was running very rich down low before. Like low 12s. By leaning the afr I find it better. Probably the hotter Egt helping a bit.
09 November 2016, 01:44 PM
#57
**** me your running some high boost and alot leaner than me
at 140kpa (1.4bar) i run 11.2 AFR , from 0.5 bar to 1 bar i run from 13.6 down to around 12.2 AFR
at 260 kpa (2.6bar)
isnt 11.5 a bit lean ?either way,
to those boost figures
09 November 2016, 02:03 PM
#58
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Actually reading the post again properly not on my phone I am running richer than you boosted. I am running 13.7 up to 0.5 bar, then 12.7 to 1 bar, from 1 bar to around 1.2 bar 11.2 then 11 all the way to 1.4 bar.
As The Rig said, isn't that very lean for that much boost? 1.4 bar is my max boost I have set on my VF35 and at max power I expect to be running the richest part of my fuel map being 11.
But at 2.4 bar I am sure your car is far from standard lol.
Unless we are talking absolute pressure here instead of relative in which case the numbers make a lot more sense to me lol.
As The Rig said, isn't that very lean for that much boost? 1.4 bar is my max boost I have set on my VF35 and at max power I expect to be running the richest part of my fuel map being 11.
But at 2.4 bar I am sure your car is far from standard lol.
Unless we are talking absolute pressure here instead of relative in which case the numbers make a lot more sense to me lol.
Last edited by supersai101; 09 November 2016 at 02:28 PM.
09 November 2016, 02:54 PM
#59
Actually reading the post again properly not on my phone I am running richer than you boosted. I am running 13.7 up to 0.5 bar, then 12.7 to 1 bar, from 1 bar to around 1.2 bar 11.2 then 11 all the way to 1.4 bar.
As The Rig said, isn't that very lean for that much boost? 1.4 bar is my max boost I have set on my VF35 and at max power I expect to be running the richest part of my fuel map being 11.
But at 2.4 bar I am sure your car is far from standard lol.
Unless we are talking absolute pressure here instead of relative in which case the numbers make a lot more sense to me lol.
As The Rig said, isn't that very lean for that much boost? 1.4 bar is my max boost I have set on my VF35 and at max power I expect to be running the richest part of my fuel map being 11.
But at 2.4 bar I am sure your car is far from standard lol.
Unless we are talking absolute pressure here instead of relative in which case the numbers make a lot more sense to me lol.
I run 1.6 bar 260kpa on my 8.9:1 compression 2.5, on a 20g with 20% meth. I'm around 10.8-11:1 afr at that boost on the meth mix. Although with petrol I still target the same afr, just less timing advance, I the region of 5 degree less almost everywhere.
As I run a standalone ecu on speed density I tune to kpa vs engine speed.