Anti-Lag demo for Pusha
03-12-2011, 01:42 PM
#1
Junior Member
Thread Starter
Join Date: Jan 2007
Location: EXTREME Southern Illinois
Posts: 281
Total Cats: 0
Anti-Lag demo for Pusha
Today was the first warm day we have had in a while. I was out messing with my timing maps again and took a video of my under-throttled ALS working.
Here is the datalog from that
I had to hold the throttle open a little to get it working which means my idle air valve isn't big enough. I might try to port it if I get sufficiently bored one day. But you can see in the log when it saw me lift throttle the timing went to -25 and it dumped in a good amount of fuel.
Here is the datalog from that
I had to hold the throttle open a little to get it working which means my idle air valve isn't big enough. I might try to port it if I get sufficiently bored one day. But you can see in the log when it saw me lift throttle the timing went to -25 and it dumped in a good amount of fuel.
Reply
0
0
03-12-2011, 03:22 PM
#2
Junior Member
Thread Starter
Join Date: Jan 2007
Location: EXTREME Southern Illinois
Posts: 281
Total Cats: 0
OK, it was bugging me, so I pulled of the idle valve. The ports are HUGE! It was barely opening though. After some searching I found that the Idle Valve PWM calibration stopped at 44%. I extended it out to 100% and this is what I got:
It builds about 1.75psi at the compressor at 'idle' with the 50/50 dump valve cracked open a bit. You can hear the turbo sucking, then pshhhhh a little when I switch it off and it goes into cool-down mode before returning to a normal idle. That's with me touching nothing but the switch.
It builds about 1.75psi at the compressor at 'idle' with the 50/50 dump valve cracked open a bit. You can hear the turbo sucking, then pshhhhh a little when I switch it off and it goes into cool-down mode before returning to a normal idle. That's with me touching nothing but the switch.
Reply
0
0
03-12-2011, 06:28 PM
#4
Junior Member
Thread Starter
Join Date: Jan 2007
Location: EXTREME Southern Illinois
Posts: 281
Total Cats: 0
I'm pretty sure I'd lose an axle from terminal wheel hop, LOL
You may notice the gauges are now retained by lengths of coathanger. That's because the wheel hop was so bad at the dragstrip that the gauges flew out of the dash when I launched.
:(
You may notice the gauges are now retained by lengths of coathanger. That's because the wheel hop was so bad at the dragstrip that the gauges flew out of the dash when I launched.
:(
Reply
0
0
03-13-2011, 12:37 AM
#7
Junior Member
Thread Starter
Join Date: Jan 2007
Location: EXTREME Southern Illinois
Posts: 281
Total Cats: 0
The diff mounts and all suspension bushings are PU, The TEIN HA shocks were as stiff as they get, and the tires were 205 Kumho MX's at 27#. Violent wheel hop halfway through first gear followed by retarded wheelspin, hopped again a little in 2nd, and wheels kept spinning most of the way through 2nd. Finally could put some power down in 3rd to catch and pass the 350z in the other lane. It was pretty horrific, I don't think I like drag racing. Maybe the VHT had something to do with it? After 2 tries i decided to quit before i broke something expensive. I never have that issue with my 225 Kumho 710's at an autocross.
Reply
0
0
03-13-2011, 01:00 AM
#8
I'm Miserable!
Join Date: Jun 2009
Location: albany, ga
Posts: 1,866
Total Cats: 0
Using an j&s safeguard as well I see, nice.
Are you just using one egt after the turbo or do you also have per cylinder egt's as well?
Are you just using one egt after the turbo or do you also have per cylinder egt's as well?
Last edited by Techsalvager; 03-13-2011 at 01:11 AM.
Reply
0
0
03-13-2011, 10:59 AM
#13
Junior Member
Thread Starter
Join Date: Jan 2007
Location: EXTREME Southern Illinois
Posts: 281
Total Cats: 0
I didn't know MS had it. Are you sure it wasn't just a 2-step rev limiter for launching? You won't have a skipped-injection cool down without sequential injection either.
Either way, it should only be working when the throttle position is below around ~8%, and/or the manifold pressure is somewhere below ~100kpa.
Either way, it should only be working when the throttle position is below around ~8%, and/or the manifold pressure is somewhere below ~100kpa.
Reply
0
0
03-13-2011, 11:09 AM
#14
The diff mounts and all suspension bushings are PU, The TEIN HA shocks were as stiff as they get, and the tires were 205 Kumho MX's at 27#. Violent wheel hop halfway through first gear followed by retarded wheelspin, hopped again a little in 2nd, and wheels kept spinning most of the way through 2nd. Finally could put some power down in 3rd to catch and pass the 350z in the other lane. It was pretty horrific, I don't think I like drag racing. Maybe the VHT had something to do with it? After 2 tries i decided to quit before i broke something expensive. I never have that issue with my 225 Kumho 710's at an autocross.
Looking back, the C5 used to hop violently on the MX's but never on the 710's or ET Streets.
Back in the F-body days, 555R's used to wheel hop really bad, but ET Streets and QTP's never showed a hint of wheel hop.
Reply
0
0
03-13-2011, 11:18 AM
#15
Thanks for the shout out, wimp.
What C5? FRC?
I used to get massive wheel hop with the RT615's, but get zero hop with the MT radials.
Looking back, the C5 used to hop violently on the MX's but never on the 710's or ET Streets.
Back in the F-body days, 555R's used to wheel hop really bad, but ET Streets and QTP's never showed a hint of wheel hop.
Looking back, the C5 used to hop violently on the MX's but never on the 710's or ET Streets.
Back in the F-body days, 555R's used to wheel hop really bad, but ET Streets and QTP's never showed a hint of wheel hop.
Reply
0
0
03-26-2011, 10:45 AM
#20
Junior Member
Thread Starter
Join Date: Jan 2007
Location: EXTREME Southern Illinois
Posts: 281
Total Cats: 0
It's an UltraSafeguard. I think it was originally for a Honda. John reprogrammed it for me to work with my Standalone. It tells my SM4 when it sees knock instead of intervening directly. Allows me to adjust boost and fueling in addition to timing. I'm very pleased with it. Only issue is that the LED's keep going out on the gauge, and they are potted so I can't fix them.
Reply
0
0
