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Old Jun 11, 2017 | 09:24 AM
  #641  
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That thing is making some steam for sure
Great job man
Think I guessed like 10.6@128 back in post 508
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Old Jun 11, 2017 | 09:32 AM
  #642  
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He's only made one full pass too... some seat time and it'll hit a 10.5 easy. In that DA and a real street driven car that's pretty damn good
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Old Jun 11, 2017 | 10:45 AM
  #643  
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Originally Posted by A.R. Shale Targa
That thing is making some steam for sure
Great job man
Think I guessed like 10.6@128 back in post 508
Lmao you sure did!!!! Nice call!
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Old Jun 11, 2017 | 10:50 AM
  #644  
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Originally Posted by big hammer
He's only made one full pass too... some seat time and it'll hit a 10.5 easy. In that DA and a real street driven car that's pretty damn good
Originally Posted by HioSSilver
Hell yea.....that thing rolling the eff out!
Thanks guys! They warned me in tech they'd toss me if I went much faster than 11.5 so I was just focusing on the launch and the 1/8 and lifted. Figured after that its just riding it out.

Had at least one pass I got locked out of third. I don't know if that was the hydraulics or if I just effed the shift.
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Old Jun 11, 2017 | 11:29 AM
  #645  
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FIRST. Please don't take this as criticism. No need for back up to tell me my car is slow or whatever. I think Darths car is 10sec & will trap over 130mph. This is only a question. Something I see on the slip that just seems abnormal. Again please don't get mad. This is not a cheap shot or anything, just a question.

I'm pretty sure most of you guys would agree that with a better 60' you will see better times all the way down the track. How linear they are depending on things of coarse.

Look at this: The differences in time from the two runs you posted.
60'- 2.19 to 1.73= .46
660'- 7.07 to 6.94= .13
1320'- 11.28 to 10.76= .52

If looking at just the 60' & 1320' that seems good. How the heck can the 660' be that close with that change in the 60'? Then back to looking right at the 1320'? What do you guys think?

Sorry, I just notice stuff.
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Old Jun 11, 2017 | 11:55 AM
  #646  
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Originally Posted by SoFla01SSLookinstok
FIRST. Please don't take this as criticism. No need for back up to tell me my car is slow or whatever. I think Darths car is 10sec & will trap over 130mph. This is only a question. Something I see on the slip that just seems abnormal. Again please don't get mad. This is not a cheap shot or anything, just a question.

I'm pretty sure most of you guys would agree that with a better 60' you will see better times all the way down the track. How linear they are depending on things of coarse.

Look at this: The differences in time from the two runs you posted.
60'- 2.19 to 1.73= .46
660'- 7.07 to 6.94= .13
1320'- 11.28 to 10.76= .52

If looking at just the 60' & 1320' that seems good. How the heck can the 660' be that close with that change in the 60'? Then back to looking right at the 1320'? What do you guys think?

Sorry, I just notice stuff.
All good. There was a significant difference in tires, and I think it'll make sense to go over this. I went from 28" DR to 26" bias ply. The progression of the runs tells the story better.

There were five prior runs, and at first the 1/8 really suffered. My first run I got a 2.0 60' but only 94 in the 1/8. And part of it was I was getting out of first not that far after the 60' was done. It was sort of like a gear swap in that sense. I was shifting 1-2 before I was even ready. Second shot, I missed third, so I got a 1.88 60 but only 89 mph 1/8. Third was a 1.77 and 100 in the 1/8. Fourth was a 1.9 and 99. Fifth was a 2.07 and a 97 cause I bogged and recovered - which was more like it ran the first night. The final run I just went to higher rpm launch and you saw how that went. With the shorter tire I was getting into fourth sooner but still after the 1/8. On the last run I almost got to the top of third. Hard to say for sure because my speedo was off due to tire size.

So I guess the best way to say it is that I think the tire change helped the launch, but hurt a little down the track between how I had to time my shifts - especially 1-2 - and possibly the whole "DR are supposedly faster than bias ply" thing. I still "only" back halfed 27 so I'm pretty sure something is still off a bit. I feel like it should be getting 28-29 in the back half.

I'm thinking with some 4.30 gears and the 26" tires we will really see what the car will do. I'll still need some seat time and driver coaching from lazerlemonta and hiossilver, but the 4.30 gears should get me into fourth right at the eighth, and I think then the times will line up better.
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Old Jun 11, 2017 | 12:47 PM
  #647  
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Originally Posted by Darth_V8r
All good. There was a significant difference in tires, and I think it'll make sense to go over this. I went from 28" DR to 26" bias ply. The progression of the runs tells the story better.

There were five prior runs, and at first the 1/8 really suffered. My first run I got a 2.0 60' but only 94 in the 1/8. And part of it was I was getting out of first not that far after the 60' was done. It was sort of like a gear swap in that sense. I was shifting 1-2 before I was even ready. Second shot, I missed third, so I got a 1.88 60 but only 89 mph 1/8. Third was a 1.77 and 100 in the 1/8. Fourth was a 1.9 and 99. Fifth was a 2.07 and a 97 cause I bogged and recovered - which was more like it ran the first night. The final run I just went to higher rpm launch and you saw how that went. With the shorter tire I was getting into fourth sooner but still after the 1/8. On the last run I almost got to the top of third. Hard to say for sure because my speedo was off due to tire size.

So I guess the best way to say it is that I think the tire change helped the launch, but hurt a little down the track between how I had to time my shifts - especially 1-2 - and possibly the whole "DR are supposedly faster than bias ply" thing. I still "only" back halfed 27 so I'm pretty sure something is still off a bit. I feel like it should be getting 28-29 in the back half.

I'm thinking with some 4.30 gears and the 26" tires we will really see what the car will do. I'll still need some seat time and driver coaching from lazerlemonta and hiossilver, but the 4.30 gears should get me into fourth right at the eighth, and I think then the times will line up better.
Love the details. I think that other slip had the mess up somewhere. The new slip is awesome.

So what rpm are you going through the 1/4 trap now?

The faster you get the harder to back half high of coarse. Like 27mph is bad lol. Still strong. One other thing is you're covering the back half in 3.x seconds. Getting in that range the car has power. My best was a 4.08. Darn. Getting that 3.8x time, back half, is awesome!
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Old Jun 11, 2017 | 12:50 PM
  #648  
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RPM FTW brotha
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Old Jun 11, 2017 | 01:04 PM
  #649  
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Originally Posted by SoFla01SSLookinstok
Love the details. I think that other slip had the mess up somewhere. The new slip is awesome.

So what rpm are you going through the 1/4 trap now?

The faster you get the harder to back half high of coarse. Like 27mph is bad lol. Still strong. One other thing is you're covering the back half in 3.x seconds. Getting in that range the car has power. My best was a 4.08. Darn. Getting that 3.8x time, back half, is awesome!
My tach stops at 6400 for some reason. So I don't know exactly what rpm but it sounded like 6800 or so. I wouldn't be surprised at all if there was a timing error on the first slip, but I had no basis for comparison.

I still feel like the driver is holding the car back some. Lol.

Originally Posted by big hammer
RPM FTW brotha
That was a hard lesson for me to learn, but you're right. After y'all opened my eyes to how gear splits worked, changed a lot of my thinking and driving - even on the few street races I still get. Just gotta build the valvevtrain for stability.
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Old Jun 11, 2017 | 01:08 PM
  #650  
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Originally Posted by Darth_V8r
All good. There was a significant difference in tires, and I think it'll make sense to go over this. I went from 28" DR to 26" bias ply. The progression of the runs tells the story better.

There were five prior runs, and at first the 1/8 really suffered. My first run I got a 2.0 60' but only 94 in the 1/8. And part of it was I was getting out of first not that far after the 60' was done. It was sort of like a gear swap in that sense. I was shifting 1-2 before I was even ready. Second shot, I missed third, so I got a 1.88 60 but only 89 mph 1/8. Third was a 1.77 and 100 in the 1/8. Fourth was a 1.9 and 99. Fifth was a 2.07 and a 97 cause I bogged and recovered - which was more like it ran the first night. The final run I just went to higher rpm launch and you saw how that went. With the shorter tire I was getting into fourth sooner but still after the 1/8. On the last run I almost got to the top of third. Hard to say for sure because my speedo was off due to tire size.

So I guess the best way to say it is that I think the tire change helped the launch, but hurt a little down the track between how I had to time my shifts - especially 1-2 - and possibly the whole "DR are supposedly faster than bias ply" thing. I still "only" back halfed 27 so I'm pretty sure something is still off a bit. I feel like it should be getting 28-29 in the back half.

I'm thinking with some 4.30 gears and the 26" tires we will really see what the car will do. I'll still need some seat time and driver coaching from lazerlemonta and hiossilver, but the 4.30 gears should get me into fourth right at the eighth, and I think then the times will line up better.
You may find that the more efficiently you use the front half, the less mph you'll gain in the back half.
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Old Jun 11, 2017 | 01:37 PM
  #651  
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Originally Posted by big hammer
You may find that the more efficiently you use the front half, the less mph you'll gain in the back half.
I hope not. But I just ran the math on the 4.30 gears. Assuming I still trap 129-130, I'll be going through the traps at 7200. So I'll be maxed out at that point. If I get lucky and get to the limiter I'd trap 132 ish. But that'd be everything I can get out of it.
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Old Jun 11, 2017 | 01:47 PM
  #652  
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Until you get 100%clean passes there is no comparing slips.
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Old Jun 11, 2017 | 02:33 PM
  #653  
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Originally Posted by Darth_V8r
I hope not. But I just ran the math on the 4.30 gears. Assuming I still trap 129-130, I'll be going through the traps at 7200. So I'll be maxed out at that point. If I get lucky and get to the limiter I'd trap 132 ish. But that'd be everything I can get out of it.
Running through the traps maxed out is good
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Old Jun 11, 2017 | 06:03 PM
  #654  
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Originally Posted by Darth_V8r
I hope not. But I just ran the math on the 4.30 gears. Assuming I still trap 129-130, I'll be going through the traps at 7200. So I'll be maxed out at that point. If I get lucky and get to the limiter I'd trap 132 ish. But that'd be everything I can get out of it.
I should clarify a bit. It's not that you may lose trap speed yet. You may even gain a mph or so yet. What I mean is you may find that your 1/8 mph will go up but your overall trap speed will remain around the same, gaining less in the back half
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Old Jun 11, 2017 | 06:09 PM
  #655  
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Originally Posted by big hammer
I should clarify a bit. It's not that you may lose trap speed yet. You may even gain a mph or so yet. What I mean is you may find that your 1/8 mph will go up but your overall trap speed will remain around the same, gaining less in the back half
Oh ok. I thought you meant like I'd drop 2-mph. But if the car is basically maxed then I'll be happy.
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Old Jun 11, 2017 | 08:26 PM
  #656  
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The 28s and 4.56 would be a better combo. You should be in the 1.5x range on the 60. So keep working on that.

Also, the bias plys aren't 26 when you're spinning them. They grow.
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Old Jun 12, 2017 | 11:41 AM
  #657  
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Nice job Jaik. That is a low 10 second car once you figure out the launch
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Old Jun 12, 2017 | 12:05 PM
  #658  
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Thanks!!! Good to know about the tire growing. I feel like here's a kind of punch list:

1. The 7/8 master is working against me. Very fine line between slip and bog. I think the tires helped because they didn't give up like the radials did. I really want to take a look at my clutch hydraulics in general. Not saying radials bad. Just more margin for error.

2. On technique I think I need lower tire pressure. I was running 15 psi. Might try 8-10. And a higher rpm dump. I've got pretty stout drivetrain parts so I should be ok there.
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Old Jun 12, 2017 | 02:43 PM
  #659  
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remember that "PRE burnout" pressure is lower than "rolling into the beams" pressure depending on the size of John Force burnout you perform..
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Old Jun 12, 2017 | 03:04 PM
  #660  
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Congrats bud. This slip is awesome and showing what a proper built 346 can do. There's folks with 400+ CI motor not running that kinda time or mph.
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