Does This Look Right

[RPR33]

Hey guys I have an r33 s2 with fmic, turbo back zorst, upgraded fuel pump, boost controller and a remap ecu.

I was watching my consult readings and on 10 psi foot down I get the following at around 7000rpms Timing at 53' btdc, injectors duty 93% afm 5.115v. are any of these reading high for such little boost? I didn't think the injectors were getting pushed so hard on 10psi!

Cheers

Russ

[Crans]

dont worry about the boost look at the airflow you maxing the afm no wonder injectors are working hard

[RPR33]

yeh is that right but? I know guys who have ran 220kw on stock afm and injectors. so it doesn't seem right that I'm maxing them out on stock turbo with 10psi.

[R31Nismoid]

injectors could be dirty, AFM dirty

fuel filter might need replacing

lots of basic things to check

[RPR33]

I have cleaned afm and replaced filter like 1-2000ks ago so maybe the injectors need a check. I just thought I'd have more room to move on the boost side of things.

Also how is the timing does that look right.

Edited August 21, 2008 by RPR33

[Adriano]

Injectors are maxed, or near enough because you have a stock ecu. It will be running mixtures around 10:1

[NewKleer]

well the injectors arent even 100% yet, and then once they are you still need to make a bit more power to get the rich AFR up to a leaner/more dangerous level...so i wouldnt be too worried about it, of course a dyno, and further datalogging would help if you are concerned.

but AFM might be more of a worry given its closer to limit...do you then get fuel cut etc? i dont know what happens when u max out AFM.

also are these peak values? if so then they didnt all happen at same time...because no way ur running 50deg BTDC at full boost!

[GTScotT]

id be trying to use a stock ecu and seeing what it reads and then another afm, as yeah, i just had a look and my afm isnt that high on a r33 turbo on a bar on a rb20, and if thats lower, then maybee ure ecu is tuned stupidly or the afm is faulty and thats whats casuing the massive afm duty cycle

[RPR33]

well the injectors arent even 100% yet, and then once they are you still need to make a bit more power to get the rich AFR up to a leaner/more dangerous level...so i wouldnt be too worried about it, of course a dyno, and further datalogging would help if you are concerned.

but AFM might be more of a worry given its closer to limit...do you then get fuel cut etc? i dont know what happens when u max out AFM.

also are these peak values? if so then they didnt all happen at same time...because no way ur running 50deg BTDC at full boost!

Hey mate I don't ever get fuel cut I think it has been removed eg: when I had my fmic installed the guy who hooked it up did not connect anything back into the actuactor, so I was hitting like 15-17psi (without knowing it) and no problems untill it shot off a cooler pipe!!!

I was funny the first time it boosted I was like wow that cooler makes it go heaps harder.... thinking I was still on 7psi haha

and yes they are peak values.

Russ

[RPR33]

I'll have a look at the timing on full boost tonight!

also what is the limit for the afm I get that 5.115v on anything from 10+

Edited August 25, 2008 by RPR33

[NewKleer]

327.68 volts as far as consult data stream is concerned...but the AFM's limit itself - not sure...id have thought 5 or 5.2V

ecutalk will clamp AFM at 9.9 if it somehow reported higher

it may be the case that more air than whenever u hit max AFM volts is going in, but the afm keeps reading 5.1 so eventually the mixture may lean out. need to get on a dyno to confirm

[RPR33]

yeh thats my thoughts 5.115 is max so anything above that will still read as 5.115v. she's rich as on the dyno running 12-13psi, also my timing was at 20btdc at full boost

I guess I just need an ecu upgrade or a remap.