Konablue10Gt
forum member
Hey everyone,
We were curious and excited to see what ported heads would be worth on our 2011 so we sent ours out to have a stage 1 port done and test the results. Our head porter was only give a weekend to work on the heads as we were under the gun to have the car back for a race.
The heads were flowed before and after, but I am going to keep those numbers to myself as I dont want to start a CFM war. I will say that the porting picked up both the intake and exhaust flow over 25 CFM.
We dynoed the car before and after the heads while it was still stock. By stock I mean paper air filter, stock exhaust, stock mufflers, factory 3.73's ect, ect. It did have an SCT 93 oct tune but that was it. No tuning changes were made for the before and after numbers on the inital dyno test.
The first dyno graph is the before and after of the heads with no tuning changes. As you can see the horsepower stayed the same and we actually lost about 6 foot pounds of torque. Simply stated the heads are not a resrtiction with the stock airbox and exhaust in place.
The second graph is a comparison of the heads on the stock setup compared to the following mods; JLT carbon CAI, American racing 1 7/8 headers, off road x pipe, stock over the axle pipes, Flowmaster Axlebacks, Alumnium drive shaft and 4.56's. I wish that we could have tested each part individually but time constraints kept us from doing so.
It picked up 54 rwhp & 30 rwtq with these mods. I know there is more in it as our dyno testing time was very limited, but those are the numbers right now. I know the heads are definitely giving me more power as it is pulling 122 mph in the quarter without being gutted, but I dont have an exact number for the power gains with the heads.
All of the dyno tests were done at operating temp(no 30 min cool downs, ice, ect, ect), in 5th gear, and on the factory 19's. The first two dyno graphs use an SAE correction factor, but the final graph I listed it with STD numbers because I have seen some others using that wanted to give them something to compare to.
I am going to reinstall the 3.73's and dyno it just to see what difference the gear change made to the numbers. I have seen reports of 5-20 rwhp differences from a gear swap so I want to know.
I have plenty of pictures of the heads and the whole installation procedure, just let me know what you guys would like too see.
Thanks
Adam
Revolution Automotive
We were curious and excited to see what ported heads would be worth on our 2011 so we sent ours out to have a stage 1 port done and test the results. Our head porter was only give a weekend to work on the heads as we were under the gun to have the car back for a race.
The heads were flowed before and after, but I am going to keep those numbers to myself as I dont want to start a CFM war. I will say that the porting picked up both the intake and exhaust flow over 25 CFM.
We dynoed the car before and after the heads while it was still stock. By stock I mean paper air filter, stock exhaust, stock mufflers, factory 3.73's ect, ect. It did have an SCT 93 oct tune but that was it. No tuning changes were made for the before and after numbers on the inital dyno test.
The first dyno graph is the before and after of the heads with no tuning changes. As you can see the horsepower stayed the same and we actually lost about 6 foot pounds of torque. Simply stated the heads are not a resrtiction with the stock airbox and exhaust in place.
The second graph is a comparison of the heads on the stock setup compared to the following mods; JLT carbon CAI, American racing 1 7/8 headers, off road x pipe, stock over the axle pipes, Flowmaster Axlebacks, Alumnium drive shaft and 4.56's. I wish that we could have tested each part individually but time constraints kept us from doing so.
It picked up 54 rwhp & 30 rwtq with these mods. I know there is more in it as our dyno testing time was very limited, but those are the numbers right now. I know the heads are definitely giving me more power as it is pulling 122 mph in the quarter without being gutted, but I dont have an exact number for the power gains with the heads.
All of the dyno tests were done at operating temp(no 30 min cool downs, ice, ect, ect), in 5th gear, and on the factory 19's. The first two dyno graphs use an SAE correction factor, but the final graph I listed it with STD numbers because I have seen some others using that wanted to give them something to compare to.
I am going to reinstall the 3.73's and dyno it just to see what difference the gear change made to the numbers. I have seen reports of 5-20 rwhp differences from a gear swap so I want to know.
I have plenty of pictures of the heads and the whole installation procedure, just let me know what you guys would like too see.
Thanks
Adam
Revolution Automotive