Erik, can you please give me a call or tell me when a good time to call is? I have a few questions. Thanks...
Made 4 passes. 1st pass was just to try a launch technique that some of the fast IRS/Cobra guys told me about and then to try to run maybe 1/2 track. I launched and went a 1.75 - 60' and short-shifted and shifted easy and it stayed somewhat straight, so I stayed in it and 10.74 @ 129.52.
Went back out for a 2nd run and decided to leave a little harder and to shift on the shift-light at 7,000 rpms. Went a 1.61 - 60' and then I missed 2nd, so I aborted the run.
Third run I was forced into the left lane (ran the tower lane for the first two passes) and I had already seen a couple cars get loose in this lane. I didn't leave hard enough and went a 1.70 - 60' and the car was all over the place, I had to completely let off the gas in 3rd and got right back on and went 10.70 @ 132. The guys at the starting line said I was all over the place downtrack.
Went back out for a 4th run and got in the tower lane. I left a little harder and went a 1.59 - 60' and shifted slow, but made sure to get it in gear and went 10.51 @ 133.
So all-in-all I am quite pleased. The mph was not there, but its no mystery, I am sure around 3+mph was due to my shifting and the rest was likely due to my elevated compressed air temps, as I don't have a larger than stock reservoir and therefore didn't circulate any ice thru the system. I did have a bag of ice on the blower for about 10 minutes at one point, but figured it was pointless without doing anything else. I saw compressed air temps of 162* before each burnout, due to sitting in the staging lanes for 30-60 minutes before the passes. The other thing is I didn't push the car thru the lanes, I just started it each time. I am undecided this morning on whether to add an icebox and fully pursue the mph with the icing strategies/pushing the car thru the lanes or not. I am pleased with the e.t. and 60' for my first time out. This was on 26x11.5x15 ET Streets on 15x10 Racestars with the IRS and stock halfshafts.
Made 4 passes. 1st pass was just to try a launch technique that some of the fast IRS/Cobra guys told me about and then to try to run maybe 1/2 track. I launched and went a 1.75 - 60' and short-shifted and shifted easy and it stayed somewhat straight, so I stayed in it and 10.74 @ 129.52.
Went back out for a 2nd run and decided to leave a little harder and to shift on the shift-light at 7,000 rpms. Went a 1.61 - 60' and then I missed 2nd, so I aborted the run.
Third run I was forced into the left lane (ran the tower lane for the first two passes) and I had already seen a couple cars get loose in this lane. I didn't leave hard enough and went a 1.70 - 60' and the car was all over the place, I had to completely let off the gas in 3rd and got right back on and went 10.70 @ 132. The guys at the starting line said I was all over the place downtrack.
Went back out for a 4th run and got in the tower lane. I left a little harder and went a 1.59 - 60' and shifted slow, but made sure to get it in gear and went 10.51 @ 133.
So all-in-all I am quite pleased. The mph was not there, but its no mystery, I am sure around 3+mph was due to my shifting and the rest was likely due to my elevated compressed air temps, as I don't have a larger than stock reservoir and therefore didn't circulate any ice thru the system. I did have a bag of ice on the blower for about 10 minutes at one point, but figured it was pointless without doing anything else. I saw compressed air temps of 162* before each burnout, due to sitting in the staging lanes for 30-60 minutes before the passes. The other thing is I didn't push the car thru the lanes, I just started it each time. I am undecided this morning on whether to add an icebox and fully pursue the mph with the icing strategies/pushing the car thru the lanes or not. I am pleased with the e.t. and 60' for my first time out. This was on 26x11.5x15 ET Streets on 15x10 Racestars with the IRS and stock halfshafts.
It has nothing to do with heatsoak and a Killer Chiller will not make the car any faster.
Fist off, with the cam overlap the IAT2 reading is skewed. It fluctuates all over the place.So if his IAT2's are above 150 to "162" and say they lower 30 degrees on the pass lowering them another 30-40 degrees isn't going to make the car any faster? Is this what you're saying by not adding a killer chiller to aid the car some?
Back to heatsoak....I will get flamed for this but whatever....why do you guys love PD blowers so much? This car lays down 800+ RWHP but traps like a 650 RWHP car due to heatsoak. I see nothing wrong with a PD blower for 1/4 mile drag strip use only but most of us use our cars on the street more than the strip. If I nail the gas I want all the power available that the car is capable of.
For one thing it was my first trip to the track. Have you ever tried racing an 800+ rwhp cobra on 26" ET Streets? It's like wrestling a gorilla. My shifts weren't fast enough and I couldn't fully stay in it. I know I was down some trap speed due to the temps, real or not. I was in the lanes for nearly an hour before every pass and made no attempts to control heat other than occasionally opening the hood. I started the car every time it moved. Your turbo or centrifugal's get warm in a traffic jam as well. On the road, my compressed air temps are not an issue. On the dyno my pulls were maybe 10 minutes apart and there was no fan, no ice either. Nothing.
You obviously have a hard time with reading comprehension.I don't care if the tune doesn't pull timing until later because you are on e85 either. Your IAT2 was over 160 before you took off. It was probably 180 at the end of the run! Hotter air contains less oxygen and will make less power period. With proper cooling I bet your car traps much higher. Heatsoak IMO.
You obviously have a hard time with reading comprehension.
Nevermind. Some people will never get it.
I comprehend just find. I simply ignored you The car was heatsoaked and trapped significantly lower than it should have with the advertised dyno number. Par for the course with a PD blower that wasn't cooled down.
IAT2 will decrease immediately when the throttle is opened. 162* will go down from the starting line. My cammed car, with 3.5" and 4.0" upper pullies will decrease from the starting line and hold a bit above ambient without ice.
As far as the "down 100hp" comment, without more information it is tough to assess expected trap speed. I would assume though that the weight is on the high end. And the owner has stated that the driving was on the conservative end.
If you have something better than a PD blower, come to the NMRA World Finals and prove it. There will be plenty of heatsoaked turds there awaiting their beating.