Nice! 4 tenths is huge. Have you tried a different tune yet based off the shorter gear and now cooler air charge? Video says page not found. So quit teasing us and repost that link, please. lol
You are leaving a lot on the table,that is a 10 sec. car at that spd.A neighbor of mine has a newer vette,LS mtr,cammed w/ headers & a procharger,went 11flat at 135mph at Dinwitte Va.Motorsports Park in Petersburg Va.He has a 9 sec. car but he babys it off the line or he will tear the trans. & rear out of it.I think he sold it because he was afraid of it,at that spd he felt like the car was closing in on him & the windows would start rattling,have not seen the car lately.
If you look at the before and after slips it's easy to see that the bulk of the gain from the shorter gear was found in his 60' time. No big surprise there as the previous combo was hunting for cam to get going after the clutch drop and the extra gear reduced the rpm drop thereby allowing the combo to climb up on the cam faster this go around. Textbook stuff. If you study the timeslips carefully you can also get an idea of where that last tenth was gained somewhere between the 330' and 660' mark resulting from the now higher speed found with a better 60' time, and no doubt partially because of the better rpm recovery during the shift to 3rd gear. IMO, there is likely something to be gained by lowering this cars front end just a tad more, and/or at the very least adding a front airdam into the mix. Doesn't have to be a design that's intrusive to the sleeper look of the car(like a chin spoiler) and even regular old 4-6" wide lawn edging can make a huge difference in front end lift at the stripe. And the overall affect of an airdam on front end lift is exponentially higher the faster you go.. the more it will help. Using some cheap plastic sheeting in strategic locations underneath the car can also help reduce underbody/chassis drag more than many may ever realize. Do both of those things and I bet cash that this car can find a bit more mph on the big end and at the stripe even if nothing else at all is changed. Without a video to compare with the previous taller geared runs, the other thing I would speculate on is that this car may be laying down on the big end due to the tune not being optimized for the new gear and ramair setup. So, my previous question still stands.
No. The vid is posted on a friends page on Facebook n I can't copy it. You can go to FB n find Tim Liscum in Scottsdale to see it. Sorry
thanks for the video.. gave up trying to find it on Facebook. Man.. those gears sure helped that motor come up on the cam. How's the power peak feel going past the stripe now? And maybe you didn't see my questions mixed in my typical 1,000 word reply above.. did you retune the ignition curve?
Next time out I will work on launching higher RPMs until i lose traction. I think I can launch much harder yet. Last run the power felt rough at top end. Its jetted spot on for 75* on the chassis dyno with 35* timing locked out with 20* start retard. So havent touched timing from dyno session. With the cold air on there now im going to go up 1 size jets and see how it feels.
cool. I bet you may very well be going a little lean on the top end. IF you have a carb, can't remember all your engine spec's, another thing to watch out for here is the height above the vent tubes. Main reason I say this is because cowl inductions, forward facing scoops and raimair setups like yours can cause buffeting above the vent tubes to high enough degree to cause variations in bowl volumes and even allows for fuel pullover in severe cases(doubtful here but worth a mention anyways). Imagine the effect of only opening one car window at highway speeds and what it does to your eardrums. Buffeting above vent tubes can be much more violent than that in such a confined space. Just another friendly tip. I absolutely LOVE the sound that a radius entry bellmouth gives an induction system. I would think that you can hear the obvious audible difference from the drivers seat during heavy throttle tip ins(winging the throttle at standstill) but have you had the pleasure of standing about 10 feet in front of the car while someone else abruptly mashes the gas? If not, I would highly recommend it because it's not the typical induction sound that most are used to.
