I made a bunch more runs this past weekend with the boost turned back down to appx. 17.5 psi. I was able to get my ancient laptop working again so I could download the runs once they were recorded. I burned a new chip with some timing changes and picked up another 10 rwhp and a whopping 45 rwtq! The best run was 607 rwhp and 718 rwtq.
Just for kicks and grins I decided to make a run in 5th gear instead of 4th gear. 4th gear is 1:1 and that is the ratio DynoJet wants you to use when making runs. I think 5th gear is .75:1. I'm sure that some of you have heard rumors about showing more horsepower and torque on a DynoJet by making a run in a gear higher than 1:1, changing the rear gear ratio to a numerically lower numbered gear, or changing to a taller tire. Well, in this instance it did just what the rumors state. The car made 628 rwhp and 760 rwtq in 5th gear! That is an increase of 21 rwhp and 42 rwtq!
The thing I need to work on now is trying to get the A/F ratio in a decent range between 3200 rpm and 4700 rpm. Looks like I will be trying even larger supplemental injectors for that. Have you guys guessed just how much I love this chassis dyno stuff?
That is awesome!!! I wonder if the 5th gear trick would work on a NA car as well as it does the turbo one. I wouldn't be surprised to see more torque once you get more fuel to it. When my car was running in the leaner AF ratio we picked up about 50-60rwtq once we got more gas to her.
SurfnSun wrote:That is awesome!!! I wonder if the 5th gear trick would work on a NA car as well as it does the turbo one. I wouldn't be surprised to see more torque once you get more fuel to it. When my car was running in the leaner AF ratio we picked up about 50-60rwtq once we got more gas to her.
Josh, the 5th gear trick didn't work on a friend of mine's Monte Carlo with a late model NA LS7 in it. He lost about 14 rwhp and 6 rwtq in 5th gear as compared to 4th gear.
As far as the leaner A/F and torque, you are absolutely correct.
BTW, I didn't realize that you actually work for Callaway in Old Lyme. I'm not sure if I told you or not, but I spent a week there during the final paint process on my Aerobody back in 1990. I will never forget it. An absolutely gorgeous part of our country.
I remember having lunch one day with Reeves Callaway at an outdoors eating spot. I told him that I was a hot rodder and had plans for the Callaway. He told me not to mess with the car and just drive the heck out of it. Well, we see how that worked out!
SurfnSun wrote:That is awesome!!! I wonder if the 5th gear trick would work on a NA car as well as it does the turbo one. I wouldn't be surprised to see more torque once you get more fuel to it. When my car was running in the leaner AF ratio we picked up about 50-60rwtq once we got more gas to her.
Josh, the 5th gear trick didn't work on a friend of mine's Monte Carlo with a late model NA LS7 in it. He lost about 14 rwhp and 6 rwtq in 5th gear as compared to 4th gear.
As far as the leaner A/F and torque, you are absolutely correct.
Steve
My thoughts are...Turbos love a load To me it kinda makes sense that a NA car wouldn't see gains while a turbo car would. I can't wait to see you rock out 800+rwtq on "low boost"
To me it kinda makes sense that a NA car wouldn't see gains while a turbo car would. I can't wait to see you rock out 800+rwtq on "low boost" 