Posted some Video's and Information later in the thread.
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Suspension....Suspension.....Suspension!
The difference is in the two power adders. Mostly in the way the two power adders react differently with the torque converter. The n2o(when sprayed off Idle which is the only way to get 1.5 60's) causes the converter to flash higher due to the Torque increase spraying off Idle.* Although the blower has good low end torque it doesn't have increases as low as the "flash point" of the converter so the effect is minimized. Also the N2O isn't effected by weather as much because it brings its' own "cold air".I appreciate the response, but the car isn't spinning. I ran consistent low 1.5's with lowering springs, drag radials and a 75shot way before the whipple.
To the other poster: I edited/deleted my post. I'll wait for the weather to cool before passing judgement about the setup.
As I said before, the car has been consistent low 1.5's on nitrous. I also know why it 60'd so well on spray. My deletion of the post only provided opportunity for speculation, and it looks like I have some interest, so I'll put it back up.
Added the Whipple this May (82mm, jlt127, CJ65mm). VMP torco tune. ALSO added Circle D 2c, CHE reloc/lca/axle brace, etc. I've only run the car in the heat, best time 10.80@127 +1750DA. I expected the .60 to be close, which it was, in the high 1.5' range. It seemed to like footbrake to where it almost pushed through the beams. Flashing from 1k netted 1.62-1.65 range. The car does NOT spin.
Fast forward to now. Added Killer Chiller (it works, very well), injectors, 2.875in (73mm) Pulley, and kill tune. It was a bit hotter at the track (94-95 ambient, 2500+ Da dropping to 1900 or so). 60? 3 passes, 1.61-1.63 range. Again, the car does NOT spin. Logged the passes, no hiccups, no timing loss, no knock. I attempted the same launch technique as with the 3.250 pulley. I did not flash from idle, didn't have time, and was running a heads up class. Car has both metco idlers, and put a brand new k060815 when pulley was changed. No belt slip as I can tell.
The quarter mile et and mph improved measurably (even with DA difference), but I'm less interested in that at the moment. I know VMP netted 1.4x with a similar pulley and stock converter. BMR did the same, with an 82mm. Justin tuned all three of us. Given the 2c/82mm already gave high 1.5's, I would think adding the power I did would net a significant improvement.
Is it a weather issue? Converter flashes around 3200, it was spec'd by Chris for the setup info I provided. I know I need to spend some more time working with it on a cool test and tune night, but I would like to bounce this off a few people before I waste time beating on the car.
Thanks!
Edit: Yes my wife video's all my passes.
curious, did you improve on your 10.80 @ 127 ? Even with a worse short time your car is putting down some power. maybe 10.40 @131.
So it is dead hooking, but worse sixty foot.
This is tune related, too much traction related, or simply a converter issue.
If a car hooks harder, with more power, but slows down to the sixty......usually the car needs a little bit more wheel speed on the launch (make it spin more) - the tune needs to be a little more aggressive down low, or the converter needs to flash a little higher.
I see this all the time with my customers, and even US! When we had more aggressive Anti-Squat after the blower went on, we were cutting inconsistent 1.50's and 1.60's - and even a few 1.80's.........and with just moving the LCA to the middle position on our LCA Relocation brackets, we havent been "worse" than a 1.52 since then, except on one pass where the car acted funny on the hit (electrical/trans/something weird)
FWIW, I dont think Justin/Rebecca went 1.4's on the 82mm Pulley. Their best 60' ever was in the mid 1.4's with a 69mm pulley. I think on an 82mm they were probably in the 1.55 - 1.60 range. I could be wrong, but when we went 1.4's on the 82mm pulley, Justin was a bit surprised.
Another FWIW, we have the same converter as you - and it is flashing in the 3600 range, IIRC.
Do you have a stock UCA/Mount? Is the car stock ride-height?
This may turn out to be another example of why I do not like suspension components that are "one-size fits all"
In other words, if the car is stock ride-height, lowering the LCA to the single position of most LCA Brackets is working backwards. You want to lower the UCA down, and "maybe" lower the LCA slightly...
Car has K-Springs, CHE LCA/relocation brackets (Only one hole adjustable), CHE axle brace, radiator support/swaybar delete, and a Strano rear adjustable swaybar (on stiffest setting). I have a UCA sitting in the garage. So you weren't spinning, it was a setting issue with your car?
I guess I worded it wrong, I knew VMP was on at least a 72mm when it went 1.4x. I'm on a similar pulley.
It has a fair amount of timing, 16-17degrees off the hit. Going to have to check the logs again to confirm. It makes me wonder, the 2c works well for others, the car has a proven tuner, but I have 60'd better with less power on a stock converter (435hp/440tq range).
As I said though, I didn't try to flash the converter, was more worried about R/T as I was running a heads up class.
I'll post a video when I get home this evening.
I was thinking VMP went 1.43 with a 69mm.
You are right, the log you sent to me didn't have much timing in it. However, it was very lean in the first two gears, a full a/f point leaner that I have seen on any logs. Coincidence? Is that worth any power? Conventional wisdom would say so, however, these combos sometimes aren't typical. So I have no idea. This is just one log.