I ran a 12.04 at 119mph. 60' time was 1.85
I dont have the slip right in front of me but those are the numbers pretty much
I think the 1/8th mph was 90.7 or so.

The day was REALLY hot and I had no traction in 1st off the line. My boost was around 25.5-26.5 on a GT35R.

Using those numbers could anyone figure out why I'm not in the high elevens at least? I know if I could get the 60' time down to a 1.75 or 1.70 I would probably hit an 11.7-11.8 but shouldnt that still be a little high of an ET for that trap or would that be about right? Am I running slower just because of my launch and first to second shift combination resulting in a slightly slower 60'? I mean what numbers would seem accurate for a trap speed of around 119? What SHOULD a decent pass for a timeslip look like? 1.7 60', 94mph 18, 11.6 @ 119? That seems more like what i should be doing but I am real new to racing so I dont really know what I am screwing up on.

I would like to get better at running the car at this low power level before I crank the boost up and run it at over 500hp and get real high trap speeds (Revving the motor well past what I would like to on a stock motor). I plan to sooner or later this season to run the car at 32-35psi on the stock block but only want to do it a few times before I rebuild it.. I would rather build the motor before I break it and trapping at 126-128 would require me to rev the hell out of it which i only want to have to do a few times before the rebuild. I will digitize the footage of my run and maybe that will help people as well figure out my problems.

 

post that video up. It sounds like you need to quicken the shift up to me. The mph is there, gaining 29 mph in the back end but et is off... maybe your letting off too early?

 

I know you keep saying you want to learn and tune it yourself, but if you want the most out of your setup I would still run it on the dyno to see how well YOU tuned it. The dyno might show something different than what you are seeing while tuning. Just my .02.

 

I was going to get it dynoed today but got lazy
I dont really care about the power anymore for now. Trapping at 118-120 is fine for me right now. I know to get better traps I will need to rev it higher and turn the boost up. The tune is good enough to get mid 11's obvisouly.

My newest goal is to make sure I am driving the car to the best that it can. I know the car with the power it has at that low boost is enough for a mid 11 as a fact. Now i wanna make sure I am doing it right Every time I go out I get better and better so I am sure it is only a matter of a few more runs and Ill be there. I just like to know of things, if any, that I may want to try or not do. Example would be the shifting to 5th thing... I tried it and trapped at 111.. obviously that doesnt work for me at least at this power level.

I have also finally talked with some well known good tuners about my tune and I figured out I am doing everything right... just being too conservative on my boost levels I have no need to run 30 psi right now... If I cant get the most our of the car now why push more power just to still not make the best out of it. It would equal a faster time and still wouldnt match the MPH... granted I would hit lower times but it would also beat my car even harder and with the stock internals and stock transfercase, rear-end and axles I dont need to beat on them any harder than I need to.

 

Two things:

1) I think it's just shifting, which includes shift points and shift speed. Your 60's aren't good, but damn, they aren't horrible either. If I can run 12.2@109-110 on 1.75 60', then you can run 11.7@118 on a 1.85 60' easily. I just don't think you shift very well and that you probably shift too early in each gear. I won't be able to tell until I see a run, and even then, I probably won't be able to tell unless I'm in person or in the car.

2) As far as your boost is concerned, you are going to see a different reading at the track than on the road, so don't be too worried about that. When you are on the road, you are building boost from nothing and having it spike hard, then hold, then taper off some. At the track, you are never below 5500 rpm, so your boost is ALWAYS at peak, but it doesn't spike, so you see the actual boost, not the spike and pre-taper boost...

 

Trinababe, Hi ,I dont know u these guys say its ur shifting.I have an AEM with no lift shift, just keep it floored and grab gears as fast as u can. That made a hugh difference, goodluck

 

http://www.vasso.net/uploads/Tim-Vasso-RF.avi

There is the video.. obviously my car is the black one not the red one

I bogged that launch badly which gave me I think a 2.0 60' time and a 12.5 ET @ 118.

My best run of the day was the 12.04 @ 118.9 with a 1.85 60' but other than the launch the runs are pretty close.

I shift at around 7.5k rpms and it seems to hit the next gears powerband pretty well. I am starting to think maybe it is the wierd stutter that it has between gears.. seems like it takes it a little bit to fully engage and when it does the car jerks forward and backwards a little bit before it pulls real hard.

 

Sounds like a BOV problem, but I forgot what BOV you're running.

On the video, which one am I hearing: you or the 1G? If it's YOUR exhaust I'm hearing, then the 1-2 was slow (not the shift, but the continuance of acceleration) and the 2-3 was off the limiter or breaking up (loud sputtering). If that was the 1G, then I couldn't hear your car at all.

 

7500 rpm 3-4 shift might make your shift before the 660' mark, that would eliminate you from the equation for the whole back half. Your 660' to 1320' mph gain is pretty good but not great for a gt35r ( I can get 30-31 mph on a gt30) but your shift might be happening right at the 660' to slow your 660' to 1320' mph gain. If your shifting slow on a 35 your going to lose boost on each shift which will kill you et, when you shift only lift about 1/4 of the way up, don't let off completly or the BV will open up and it takes a second for it to close so you lose boost there to. If you can hear you BV you are letting up to much.

 

I dont lift the gas I have the Utec and have it set at 6k for launch control (Which also works for shiftnolift). My car is the one you can hear... his is not nearly as loud. The blow off valve does not open between shifts either. I am having problems digitizing the other runs but I did notice watching it through the TV that that car backfires VERY loudly between every shift. Right now the Utec is cutting fuel to get to the launch RPM (At 6k) which is also what it does between shifts. I figured out the clutch switch the Utec uses is the high switch (Which is pretty much the top of the clutch travel) so I am thinking the Utec may be cutting power all the way until the clutch is FULLY engaged causing the car to slow down badly between shifts until the clutch gets ALL the way out.

I will see if I can move the clutch switch to the lower point or make a few runs without the launch control on (Hopefully i can still get decent launches without it) and see if the shifting improves. The more i watch the videos the more I can tell the shift itself seems ok... the car just kinda jerks around once I hit the next gear which is what causes me to believe its the utec cutting power until the clutch is ALL the way out. Ill test it out some and see if I can help it.

The reason I am not gaining that much speed in the last half is probably a small bit the shifting problem but mainly a VERY low boost setting for the turbo. This turbo seems to wake up at 27+ psi. These runs were all at about 25.5-26psi. Car wasn't making that much power but still enough for a mid 11. Maybe Ill go to the track tonight and play.

 

I learned the problem... it turned out it wasnt me the whole time. You can read my other thread to learn the problem. I am just filled with excitement now... I just need to learn to launch the car again with no stutterbox but I am confident in a few runs at least one will have a decent launch and it should be an 11.5 or so.

 

There was no way I could know about the whole rev limiter thing, but I think I was pretty close in my attempted diagnosis:

"then the 1-2 was slow (not the shift, but the continuance of acceleration) and the 2-3 was off the limiter or breaking up (loud sputtering"

 

Yes everyones ideas were nuts on. The shifting was the problem... i was shifting it fast enough... the car wasnt letting have any power which was the problem. It is now solved and I am the happiest person right now. I am expecting a hopeful 11.49 or so next run at the low boost setting. Once I run it at this low boost and actually hit decent times I will crank the boost and run it where it should be (30ish) and shoot for the high 10's. Im finally getting closer to where I wanted the car.