Ported LS3 results on bone stock LS3
01-31-2013, 04:11 PM
#1
Melting Slicks
Thread Starter
Ported LS3 manifold results on bone stock LS3
I had my intake manifold ported by a local shop(Cordes Performance Racing in Mesa Az). They wanted some data for a bone stock LS3, so I volunteered my 2011 C6. They covered labor costs and dyno time. I just paid for the ported intake if it picked up power. It did, so I paid them.
My car is a bit of an anomaly in that it is right about 400rwhp in stock configuration. My dyno a year ago was 404rwhp/399rwtq on a Dynojet with my Callaway CAI installed. We used a Dynapack today and baseline was 397.2rwhp and 402.8 rwtq with the stock LS3 air intake. Right after the baseline we put the ported intake on and dyno'd it again. 407.8rwhp and 410.9rwtq was the result.
We then put my Callaway back on and it was 413rwhp. For some reason it was pulling timing to 10* and ramping back up to 17* with the Callaway installed. It wasn't doing that with the stock air intake on the car. I don't know if it was heat soaked by that point or something with the Callaway causing the car to pull timing.
This was all done within about an hour and a half on the dyno with no tune changes. We noticed the mid range AFR went from 11.7 with the stock intake to 11.9 with the ported. At the top of the RPM range over 6000rpm they were both reading 12.2-12.3. I'm happy with the results as they can only get better as I further modify the car. It sure is a heck of a lot easier than putting an underdrive pulley on.
Next week I will be installing Pfadt headers, catless mid-pipe, and factory Z06 axleback. The car will be tuned by NicD of Phoenix Az. I'll post up those results in a separate thread.
Stock intake manifold and stock air intake vs. ported intake manifold and stock air intake. Stock GM tune.
Old dyno sheet with Callaway installed and stock GM tune:
My car is a bit of an anomaly in that it is right about 400rwhp in stock configuration. My dyno a year ago was 404rwhp/399rwtq on a Dynojet with my Callaway CAI installed. We used a Dynapack today and baseline was 397.2rwhp and 402.8 rwtq with the stock LS3 air intake. Right after the baseline we put the ported intake on and dyno'd it again. 407.8rwhp and 410.9rwtq was the result.
We then put my Callaway back on and it was 413rwhp. For some reason it was pulling timing to 10* and ramping back up to 17* with the Callaway installed. It wasn't doing that with the stock air intake on the car. I don't know if it was heat soaked by that point or something with the Callaway causing the car to pull timing.
This was all done within about an hour and a half on the dyno with no tune changes. We noticed the mid range AFR went from 11.7 with the stock intake to 11.9 with the ported. At the top of the RPM range over 6000rpm they were both reading 12.2-12.3. I'm happy with the results as they can only get better as I further modify the car. It sure is a heck of a lot easier than putting an underdrive pulley on.
Next week I will be installing Pfadt headers, catless mid-pipe, and factory Z06 axleback. The car will be tuned by NicD of Phoenix Az. I'll post up those results in a separate thread.
Stock intake manifold and stock air intake vs. ported intake manifold and stock air intake. Stock GM tune.
Old dyno sheet with Callaway installed and stock GM tune:
Last edited by jon6.0; 01-31-2013 at 04:45 PM.
05-29-2014, 05:47 PM
#4
Melting Slicks
Thread Starter
What the Callaway was better at was dropping IAT's once I started moving again, like taking off from a stoplight. It took longer for the IAT sensor to react with the stock air intake.
