LS2 403 D1SC Procharged 'street driver'.
09-04-2008, 12:38 PM
#66
Idle clip from the rear with EPP blower cam. 232/240 @.050 on a 115 lsa, 1 7/8 Kooks, Kooks high flow cats (y pipe) and a Magnaflow cat back.
This was untuned.
http://s160.photobucket.com/albums/t...argedIdle1.flv
This was untuned.
http://s160.photobucket.com/albums/t...argedIdle1.flv
09-04-2008, 03:31 PM
#68
Nice writeup, BTW. Feels like I'm back in school. 
Why did you use a Blow Off Valve (BOV) instead of a by-pass valve (BPV)? BPV's like the Vortech Mondo or the ATI Race bypass seems to be what everyone else is running.
Also, you might want to spray your meth into the ATI plenum so that it hits the IAT sensor. Then you can tune the base spark aggressively, but back it out based on high IATs. That way, if you ever have a problem with the meth your IAT's will shoot up and the PCM will pull out timing and save the motor.
Why did you use a Blow Off Valve (BOV) instead of a by-pass valve (BPV)? BPV's like the Vortech Mondo or the ATI Race bypass seems to be what everyone else is running.
Also, you might want to spray your meth into the ATI plenum so that it hits the IAT sensor. Then you can tune the base spark aggressively, but back it out based on high IATs. That way, if you ever have a problem with the meth your IAT's will shoot up and the PCM will pull out timing and save the motor.
09-04-2008, 08:20 PM
#69
Nice writeup, BTW. Feels like I'm back in school.
Why did you use a Blow Off Valve (BOV) instead of a by-pass valve (BPV)? BPV's like the Vortech Mondo or the ATI Race bypass seems to be what everyone else is running.
Also, you might want to spray your meth into the ATI plenum so that it hits the IAT sensor. Then you can tune the base spark aggressively, but back it out based on high IATs. That way, if you ever have a problem with the meth your IAT's will shoot up and the PCM will pull out timing and save the motor.
Why did you use a Blow Off Valve (BOV) instead of a by-pass valve (BPV)? BPV's like the Vortech Mondo or the ATI Race bypass seems to be what everyone else is running.
Also, you might want to spray your meth into the ATI plenum so that it hits the IAT sensor. Then you can tune the base spark aggressively, but back it out based on high IATs. That way, if you ever have a problem with the meth your IAT's will shoot up and the PCM will pull out timing and save the motor.
I chose to spray the meth downstream of the plenum for that very exact reason. I have a twin nozzle set up ahead of the TB and I located the IAT in the EGR spot on the FAST 90 to see the cool down. The IAT/timing tables are set up to retard timing in the event the temp gets very high.
Last edited by helicoil; 09-04-2008 at 08:42 PM.
09-05-2008, 02:31 PM
#70
Never played with a BOV before so I have some questions. When you're idling does it bleed off air like a BPV? So is the BOV in your configuration just there to bleed off the boost that the BPV can't take care of?
Didn't know you moved the IAT sensor. That should work pretty well. I wonder if the sensor itself might get heat soaked quicker being that close to the engine?
I've been tuning out some of my knock out with IAT spark reduction during these hot Texas summer days. It was originally tuned in 50 degree weather and with boosted IATs well under 90 F the car could handle 19-20 degrees advance with no problem. This summer with the IATs pushing 120-140 F I started getting knock so I'm having to pull it down to 16-17. I know, I need a water injection kit.
Didn't know you moved the IAT sensor. That should work pretty well. I wonder if the sensor itself might get heat soaked quicker being that close to the engine?
I've been tuning out some of my knock out with IAT spark reduction during these hot Texas summer days. It was originally tuned in 50 degree weather and with boosted IATs well under 90 F the car could handle 19-20 degrees advance with no problem. This summer with the IATs pushing 120-140 F I started getting knock so I'm having to pull it down to 16-17. I know, I need a water injection kit.
09-07-2008, 06:39 PM
#72
Never played with a BOV before so I have some questions. When you're idling does it bleed off air like a BPV? So is the BOV in your configuration just there to bleed off the boost that the BPV can't take care of?
Didn't know you moved the IAT sensor. That should work pretty well. I wonder if the sensor itself might get heat soaked quicker being that close to the engine?
I've been tuning out some of my knock out with IAT spark reduction during these hot Texas summer days. It was originally tuned in 50 degree weather and with boosted IATs well under 90 F the car could handle 19-20 degrees advance with no problem. This summer with the IATs pushing 120-140 F I started getting knock so I'm having to pull it down to 16-17. I know, I need a water injection kit.
Didn't know you moved the IAT sensor. That should work pretty well. I wonder if the sensor itself might get heat soaked quicker being that close to the engine?
I've been tuning out some of my knock out with IAT spark reduction during these hot Texas summer days. It was originally tuned in 50 degree weather and with boosted IATs well under 90 F the car could handle 19-20 degrees advance with no problem. This summer with the IATs pushing 120-140 F I started getting knock so I'm having to pull it down to 16-17. I know, I need a water injection kit.
Don't know about the heat soaking, I don't think it would be likely. The manifold really doesn't get that hot to begin with.
Yes, I know what you mean with the temps. I will be doing some more with mine this week on the dyno.
09-07-2008, 08:13 PM
#75
10 Second Club
I believe you will achieve your goal and then some. My goals were like yours as well as my set up, except for I kept stock cubes. Good luck.
09-18-2008, 09:15 PM
#76
Made the first two runs Wednesday night on the New LS2 403.
This was through the catted Y and Magnaflow 3" catback - quiet!
Run 1
60' 1.48
330' 4.23
1/8 6.58
MPH 104.03
1000' 8.62
1/4 10.357
MPH 130.32
Run 2
60' 1.48
330' 4.25
1/8 6.60
MPH 103.95
1000' 8.64
1/4 10.371
MPH 130.94
The trans was short shifting 1-2 and 2-3 around 5000 RPM, I believe it has to do with the vacuum modulator on the trans and the fact that there is now boost present, whereas last year with the h/c there wasn't and it shifted where it was programmed to. I am not real sure if this helped it or hurt it accelerate down low. Nonetheless, I have accomplished my goal at only 9psi!
I'll post a vid real soon.
This was through the catted Y and Magnaflow 3" catback - quiet!
Run 1
60' 1.48
330' 4.23
1/8 6.58
MPH 104.03
1000' 8.62
1/4 10.357
MPH 130.32
Run 2
60' 1.48
330' 4.25
1/8 6.60
MPH 103.95
1000' 8.64
1/4 10.371
MPH 130.94
The trans was short shifting 1-2 and 2-3 around 5000 RPM, I believe it has to do with the vacuum modulator on the trans and the fact that there is now boost present, whereas last year with the h/c there wasn't and it shifted where it was programmed to. I am not real sure if this helped it or hurt it accelerate down low. Nonetheless, I have accomplished my goal at only 9psi!
I'll post a vid real soon.
09-18-2008, 10:10 PM
#77
One video.
The guy in the other lane is making all the noise. We just happened to start our burnouts at the same time.
http://s160.photobucket.com/albums/t...-18-081037.flv
The guy in the other lane is making all the noise. We just happened to start our burnouts at the same time.
http://s160.photobucket.com/albums/t...-18-081037.flv
09-19-2008, 05:32 AM
#80
Made the first two runs Wednesday night on the New LS2 403.
This was through the catted Y and Magnaflow 3" catback - quiet!
Run 1
60' 1.48
330' 4.23
1/8 6.58
MPH 104.03
1000' 8.62
1/4 10.357
MPH 130.32
Run 2
60' 1.48
330' 4.25
1/8 6.60
MPH 103.95
1000' 8.64
1/4 10.371
MPH 130.94
The trans was short shifting 1-2 and 2-3 around 5000 RPM, I believe it has to do with the vacuum modulator on the trans and the fact that there is now boost present, whereas last year with the h/c there wasn't and it shifted where it was programmed to. I am not real sure if this helped it or hurt it accelerate down low. Nonetheless, I have accomplished my goal at only 9psi!
I'll post a vid real soon.
This was through the catted Y and Magnaflow 3" catback - quiet!
Run 1
60' 1.48
330' 4.23
1/8 6.58
MPH 104.03
1000' 8.62
1/4 10.357
MPH 130.32
Run 2
60' 1.48
330' 4.25
1/8 6.60
MPH 103.95
1000' 8.64
1/4 10.371
MPH 130.94
The trans was short shifting 1-2 and 2-3 around 5000 RPM, I believe it has to do with the vacuum modulator on the trans and the fact that there is now boost present, whereas last year with the h/c there wasn't and it shifted where it was programmed to. I am not real sure if this helped it or hurt it accelerate down low. Nonetheless, I have accomplished my goal at only 9psi!
I'll post a vid real soon.
Nice! I'll bet the short shifting is hurting the times quite a bit, as a lot of boost should be building between 5000 and 5500 rpm. Bob