Hey guys those of you who remember me I've been busy and lazy and havent been on here for a while. However when I go back to school I should be on mor often. In the mean time.....
I ran on a pod dyno this morning (a Dynapack). If anyones heard of one...they seem to be a lot better than dynojet roller dynos in that they remove the wheel/tire interface. The pods attach to the hubs of the drive wheels and use a hydraulic brake system to measure hp. There relatively new and cost about 2x as much as a dynojet to buy (which makes me assume there better ). You can do a google search on them for more info. Anyways I made:
409hp @ 5400 rpms SAE corrected
1549 ft-lb @ 4300 rpm (Note: this is actual wheel torque due to my 3.55 rear end, engine torque after drivetrain losses would be 1549/3.55 = 436 ft-lbs which is the number everyone is used to to seeing)
All this was while running an A/F between 13.76 and about 2000 rpms dropping slowly to 12.45 at 5800 rpms. At peak hp the A/F was 12.68. This is all while running stock timing and cpu and premium pump gas on a 10.8 to 1 compression ratio.
The only problem I have is that my sae correction was very high about 1.23 throught the rev range. This was because it was about 100 deg. in the shop and the temp probe on the top of my air filter (just sitting on top with my hood open) was reading 140 deg. due to the heat from my engine (I dont run a filter in the fenderwell). This temp was also later verified with a laser pyrometer. They dyno operater told me the sae correction factor was so high because of the inlet air temps and that the correction although high was correct in my case. But in any case I'm happy even if the numbers are 10-20 hp less in reality although I am told this is unlikely as the correction factor should be accurate in my case.
Also to get flywheel hp/tq he put in a 1.16 correction factor (meaning 16% drivetrain losses to calculate flywheel power). My car has a T-5 and the rear end has 144k miles on it (besides the ring and pinion which are newer) but I dont think drivetrain losses are that much. Anyways with those estimated losses the motor makes an estimated 474hp and 506 tq.
Sorry for the really long post but chime in and tell me what you guyz think. I'll try and have my graphs and tabulated data posted up sometime tonight when my neighbor gets home from work.
I ran on a pod dyno this morning (a Dynapack). If anyones heard of one...they seem to be a lot better than dynojet roller dynos in that they remove the wheel/tire interface. The pods attach to the hubs of the drive wheels and use a hydraulic brake system to measure hp. There relatively new and cost about 2x as much as a dynojet to buy (which makes me assume there better ). You can do a google search on them for more info. Anyways I made:
409hp @ 5400 rpms SAE corrected
1549 ft-lb @ 4300 rpm (Note: this is actual wheel torque due to my 3.55 rear end, engine torque after drivetrain losses would be 1549/3.55 = 436 ft-lbs which is the number everyone is used to to seeing)
All this was while running an A/F between 13.76 and about 2000 rpms dropping slowly to 12.45 at 5800 rpms. At peak hp the A/F was 12.68. This is all while running stock timing and cpu and premium pump gas on a 10.8 to 1 compression ratio.
The only problem I have is that my sae correction was very high about 1.23 throught the rev range. This was because it was about 100 deg. in the shop and the temp probe on the top of my air filter (just sitting on top with my hood open) was reading 140 deg. due to the heat from my engine (I dont run a filter in the fenderwell). This temp was also later verified with a laser pyrometer. They dyno operater told me the sae correction factor was so high because of the inlet air temps and that the correction although high was correct in my case. But in any case I'm happy even if the numbers are 10-20 hp less in reality although I am told this is unlikely as the correction factor should be accurate in my case.
Also to get flywheel hp/tq he put in a 1.16 correction factor (meaning 16% drivetrain losses to calculate flywheel power). My car has a T-5 and the rear end has 144k miles on it (besides the ring and pinion which are newer) but I dont think drivetrain losses are that much. Anyways with those estimated losses the motor makes an estimated 474hp and 506 tq.
Sorry for the really long post but chime in and tell me what you guyz think. I'll try and have my graphs and tabulated data posted up sometime tonight when my neighbor gets home from work.