can you get bigger injectors for the 1.9mjet 8v?? and if so does anybody have any model numbers or what engine they can be taken from?

maybe any of the bigger alfa engines??

Thanks for the help in advance

im not sure about injectors itself, but the bravo 1.9, and maybe some alfa diesels are 16v, could you convert your to 16v? - quikcer, and i think might be more economical. then get a cam set after maybe?

Possibly from the 2.4 Jtd Alfas...however im not 100% sure if the GP being a 8v will effect anything, most likley not.

see if there are any for the astra 1.9 130 as far as i no the engine is exactly the same

Whatever you use, they need to have a classification number on them that's recognised by the ECU (and obviously have it programmed in). If it is recognised, the fuelling will be self-adjusted to the correct level, so you won't gain anything. If they aren't recognised/stored, the ECU will switch to limp-mode, if it allows start-up at all.

Remap with the original injectors is the best way.

D4nny8oy said:

Whatever you use, they need to have a classification number on them that's recognised by the ECU (and obviously have it programmed in). If it is recognised, the fuelling will be self-adjusted to the correct level, so you won't gain anything. If they aren't recognised/stored, the ECU will switch to limp-mode, if it allows start-up at all.

Remap with the original injectors is the best way.

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but wont i be able to get it mapped into the car to gain the benifit of the bigger injectors? just a general query really

What I'm saying is- the original injectors have more than enough flow in them to be remapped high enough to cause issues elsewhere (eg, clutch/gearbox/turbo/etc). There's no need for uprating them.

What performance figures are you looking for?

D4nny8oy said:

What I'm saying is- the original injectors have more than enough flow in them to be remapped high enough to cause issues elsewhere (eg, clutch/gearbox/turbo/etc). There's no need for uprating them.

What performance figures are you looking for?

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i get you now, i think i am looking at this because i paid £350 for a custom remap and i am not really happy with it... maybe i should just be looking at another remap but that means £350 down the pan

Expressed your concerns with the mapper? Maybe they have reasons as to why it's not making the numbers?

This is what he e-mailed me saying and now ignores my calls and e-mails. he advertised geeric for £199 and gains up to 165hp and 265Ft/lb and a custom remap for £350 with gains 180hp+. i paid for the custom as i wanted the extra gains and got 165.5hp and 275ft/lb but to be fair it doesnt even feel like these figures. not sure wether he has changed the dyno settings to get duff figures as my collegue took the car for me and said it was reading 140hp to start and he adjusted the settings on that big unit with the graph screen to make the car go faster at 165hp...which we all know the map has to come back off and be adjusted. i emailed him expressing my concern and got the following reply :

Your ECU is an EDC16 series which has a feature called adaptation. This is used by the ECU as a type of self learning feature, it uses data collected by the ECU and over time this improves both economy and performance. In some ECU's we will disable adaptation so that the map it is left with will never alter, on your type of ECU we leave it on, which gives a much nicer and more drivable car over time.

During a stage 2 map we would usually remove the car from the dyno and test drive it on the road for 10-20 mins so that we can allow the adaptation to collect data and then reinstall the car onto the dyno and retest it for max power figures, we didnt have time to do this as another customer was waiting.

We need to allow a percentage of around 8-10% for adaptation in power figures, if we had given the car the extra 10% in the map on the day and then it had gained a futher 10% during adaptation your torque figure could have ended up around 332 ft/lb, which would have resulted in a dead clutch.


Since that i have emailed back saying i have modified my car more and if he could tweek the map and no reply, tried ringing and he hangs up

Pics of the dyno graphs?

Unsure of his "adaption will gain power" idea. On petrol engines the self-adaptives adjust for economy and emissions, as well as driveability, by monitoring the knock, lambda and other sensors to trim the fuelling and timing. It isn't there to gain power unless you're using higher-octane fuel which it can get an advantage from.

From what I remember, mJets don't have as much adaption (only recently they've started fitting lambda sensors, but even then they're only really used for monitoring other areas), and what there is would only be for economy and driveability- it wouldn't boost power. Funny how that 10% future gain to your 165bhp would equate to the 180+bhp he promised.

D4nny8oy said:

Pics of the dyno graphs?

Unsure of his "adaption will gain power" idea. On petrol engines the self-adaptives adjust for economy and emissions, as well as driveability, by monitoring the knock, lambda and other sensors to trim the fuelling and timing. It isn't there to gain power unless you're using higher-octane fuel which it can get an advantage from.

From what I remember, mJets don't have as much adaption (only recently they've started fitting lambda sensors, but even then they're only really used for monitoring other areas), and what there is would only be for economy and driveability- it wouldn't boost power. Funny how that 10% future gain to your 165bhp would equate to the 180+bhp he promised.

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I think the guy just trys to blind people with science, i think he gets his maps emailed to him and just uploads it and doesnt acctually know how to adjust them so called 'custom'

i will try an get a picture of the graph uploaded. i was going to take the car somewhere else to get it RR to see if i even have the gains he said he gave me but its just all wasting money.

if i get the car RR elswhere and the figures are way out i am tempted to go to trading standards as i found out this guy had loads of issues of ripping ppl off befor so had closed down and renamed his buisness to what it is now

I remember reddot saying something similar where the ecu will adapt and learn based on your driving style.

Not sure he has told you any lies.

Shauncorwyn said:

I remember reddot saying something similar where the ecu will adapt and learn based on your driving style.

Not sure he has told you any lies.

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yea but when you leave red dot you know what gain you have... he is saying the power will go up 10% so you guys getting 190+hp at red dot get 209+hp the next day i dont belive that

Got a better one that shows the whole printout (and the right way up, lol)?

Dyno Dynamics always show the calibration data for the dyno (what mode was used, air/intake temp, etc) and it'll be handy to see this (earlier versions show it along the bottom, under the graph).

there is no calibration or mode details just the file number he saved it as.. no temp pressures or anything

The plot thickens....

also i have just recalled something which i find very strange....

i used to have fabia VRS which i had remaped there.. when i went in the first RR read out said 148hp standard and i rem thinking bloody hell thats good standard and he did too...then he said oh wait there i havnt dropped the pressure setting on the dyno and then it read 136hp so he said there we go thats more like it...... so the bloke who had just had his car remapped before me must be 10% down on what he was acctually told they had given him never thought about it at the time as i was that happy with my VRS map which is the same car as the owner had so he was bound to have had a mess around with his but musnt have a clue when it comes to other cars

seems like a rip off merchant. not showing any of the input information on the dyno. you can make a dyno read what you want by adjusting these to suit. might be worth getting an inpdependent RR printout to go back to them with and threaten to take it further?