lost on getting more power. 2000 camaro

[rpmspeed]

I increased the maf for the intake with a little more airflow coming into the maf than stock. I use PE for airfuels. I will do the autove for cams and what not for the drivibility but not wot

[macca33]

thanks for the response. and the afrs are logged under wo2afr1 in the log. around 12.7-12.8 afrs.

Sorry mate - forgot that other logs won't directly assimilate with the way I've got my V7.5 dashboard set up - I use calculated PIDS, so don't get the WB AFR data stream showing up on my dash.

I also noted the timing you were running, but didn't comment because it seems you blokes over there run more timing than us up the top end of your tunes, in general.

cheers

[joecar]

I don't think you will make more power for 2 reasons:
- injector DC is running out,
- MAP is dropping as rpm climbs up;

also, MAF is seeing some bad flow, the PCM may smooth/filter this if it's not too pronounced (supported by BEN looking good)... it is making CALC.CYLAIR suffer, IDK what the PCM is doing with it internally, log GM.CYLAIR_DMA to see (but do not exceed 24 pid channel count)(you could drop ECT and add CYLAIR_DMA).

There are several options:
- make it a little richer near peak torque (the NBO2 seems to indicate you could/should go richer), and a little leaner at peak power;
- reduce timing advance around peak torque a little (but it's ok near peak power);

interesting log file

[joecar]

BTW (not related): these are out of range:

Out of Range calibration summary: 07:38:19 pm, Friday May 18, 2012

Transmission Calibration.Trans Pressures
{D0701} Base Pressure 1->2 Shift, contained one or more out of range values when loaded.
{D0702} Base Pressure 2->3 Shift, contained one or more out of range values when loaded.
{D0703} Base Pressure 3->4 Shift, contained one or more out of range values when loaded.

[BLK02WS6]

I think the reason the MAP is dropping is the K&N intake - if it is the one that replaces the stock airbox, I've seen those choke up an F-Body several times... recommend going back to a stock air box with a panel filter - add one of the cold air scoops for the best results (Fast toys or whoever makes one these days)...

Mostly, I think it is the low reading dyno...

[joecar]

What ET/TS does it trap...?

[maudyZ28]

i'll have a quick look over the log tonight but wanted to chime in on the timing. Mine running 12.6 AFR and at 28* from about 5000 rpm upwards, and the car seems really happy. If feels flat otherwise. For comparison i've got a 99 with 228R cam and 253 heads (stock) and ran a best of 12.3 @ 113 mph. This was with street tires and a 0-60ft of 2.03 sec.

[joecar]

Hi Maudy, what timing do you run from 3600-4800 rpm...?

[maudyZ28]

Hi Maudy, what timing do you run from 3600-4800 rpm...?

i'm actually being very cheeky and running the stock 99 timing as is it very agressive. Although I have stock 253 ls2 heads which bump compression a little when I pulled 2-3 deg out everywhere the car seemed to be flat. So slowly bumping it up a degree at a time I got back to stock timing and have left it there.

from memory I believe at peak torque (the rpms you state above) the timing is down to about 21-22* at maximum, but I run a constant fueling of 12.6 after 3000 rpm

[joecar]

Ok, that's the key: to remove some timing and see if the engine likes it better or not.

Thanks Maudy.