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Old Dec 13, 2011 | 01:24 PM
  #61  
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Originally Posted by drb
Tom, see the attached chart for a close estimate of what your RPM would be at various trap speeds.

Your low tire pressure wasn't helping with the trap speed. Less tire pressure usually increases the size of the tire contact patch with the road. A larger contact patch means that there is more mechanical rolling resistance which results in lower trap speeds.


Dan (drb)
thanks for that chart Dan.. i think i was reving to around 8400 or so to get 131.. and the one back tire was only 12psi the rest are 18. im not sure why the one was only 12.
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Old Dec 13, 2011 | 02:33 PM
  #62  
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You don't need to be a fast shifter to chirp the tires, just need to get off of the clutch fast which has nothing to do with the duration of the shift.

Pushing the clutch all the way in to shift is definitely not going to net you the fastest times either. Are you grinding 3rd because your clutch isn't disengaging or because your synchro has gone bad?
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Old Dec 13, 2011 | 02:45 PM
  #63  
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Originally Posted by Boltz.
You don't need to be a fast shifter to chirp the tires, just need to get off of the clutch fast which has nothing to do with the duration of the shift.

Pushing the clutch all the way in to shift is definitely not going to net you the fastest times either. Are you grinding 3rd because your clutch isn't disengaging or because your synchro has gone bad?
did you look at the log i linked? from a scale of 1/10 how slow are my shifts? lol.

there's no way i can get away with pushing clutch all the way in, its a habit.. maybe i should get a clutch stopper then?

its grinding from the trans.. although it didn't do it the last time i had the car out, so not sure honestly.. the trans is notchy though.
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Old Dec 13, 2011 | 07:26 PM
  #64  
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Originally Posted by tscompusa
did you look at the log i linked? from a scale of 1/10 how slow are my shifts? lol.

there's no way i can get away with pushing clutch all the way in, its a habit.. maybe i should get a clutch stopper then?

its grinding from the trans.. although it didn't do it the last time i had the car out, so not sure honestly.. the trans is notchy though.
I did look at the log. Seems to be about a second between going out of full boost and returning to full boost. Can't really compare that to my own shifts because I never actually look at that in my own logs when going over my drag runs. I'm a spaz when it comes to shifting.

I can tell you however that after watching what must be ten million race videos since I was like fourteen over the past twelve years and spending tons of time at the race track I need not read a log, yet just hear a run. For your 1-10 comment, I'd probably give you a 7 or 8 (on the slower side of the scale ) Since your loaded up with the V7, I'd give the NLTS patch a shot and see how your times would improve. The third gear grind is definitely going to put a damper on things though.

The thing about the clutch stopper is that you sometimes need to push the clutch all the way in to get the car into first from a stop, especially with the exedy's. So the get it into first from a stop point would be different from the switch gears while racing point.

My brain is fried tonight. Sorry if this was a dyslexic post.
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Old Dec 13, 2011 | 07:49 PM
  #65  
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Where do you have the limiter set?
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Old Dec 13, 2011 | 08:56 PM
  #66  
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Originally Posted by Boltz.
I did look at the log. Seems to be about a second between going out of full boost and returning to full boost. Can't really compare that to my own shifts because I never actually look at that in my own logs when going over my drag runs. I'm a spaz when it comes to shifting.

I can tell you however that after watching what must be ten million race videos since I was like fourteen over the past twelve years and spending tons of time at the race track I need not read a log, yet just hear a run. For your 1-10 comment, I'd probably give you a 7 or 8 (on the slower side of the scale ) Since your loaded up with the V7, I'd give the NLTS patch a shot and see how your times would improve. The third gear grind is definitely going to put a damper on things though.

The thing about the clutch stopper is that you sometimes need to push the clutch all the way in to get the car into first from a stop, especially with the exedy's. So the get it into first from a stop point would be different from the switch gears while racing point.

My brain is fried tonight. Sorry if this was a dyslexic post.
Im definitely going to turn NLTS on next time im at the track for sure. i understood everything you said.. cant be that fried.

the 3rd gear grind comes and goes.. it didn't happen when i took the car out on the street yesterday.. its weird. maybe i just need to let the transmission fluid heat up more before running. i use a severe gear amsoil 75w90

i never thought about the clutch being hard to get in gear with the stopper.. that's a good point.

i have the restrictor removed from my slave cylinder and the pedal stop removed ( the oem plastic dumb one).

I think the NLTS will really help me out.
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Old Dec 13, 2011 | 09:37 PM
  #67  
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Originally Posted by E-Spec@Tach Motor Works
Where do you have the limiter set?
with that log im not sure honestly. everytime i raised the boost i had to adjust the rev limit because i was hitting the rev limiter just a hair before i finished. the 131 pass i did not hit the limiter though.

i started at 8143, then went to like 8333, then 8446, then 8562. i dont believe i set it past 8562 ever during the runs. 8562 on ecuflash shows about 8700 on my rpm gauge (if i can remember correctly).

this might not be accurate 100%, i might of set it to 8200~ something also. i will check the log time stamp on the computer then compare it to the time slip and re-edit this post.

Last edited by tscompusa; Dec 13, 2011 at 09:43 PM. Reason: got the rpm ranges wrong
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Old Dec 13, 2011 | 09:41 PM
  #68  
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Originally Posted by tscompusa
with that log im not sure honestly. everytime i raised the boost i had to adjust the rev limit because i was hitting the rev limiter just a hair before i finished. the 131 pass i did not hit the limiter though.

i started at 8021, then went to like 8200, then 8300, then 8500. i dont believe i set it past 8500 ever during the runs. 8500 on ecuflash shows about 8700 on my rpm gauge (if i can remember correctly).

You clearly lost a second banging off of the limiter... And the mph chart previously posted shows where the lost mph went vs the log.




Take a look at the log rpm vs your 1/4mph.
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Old Dec 13, 2011 | 10:29 PM
  #69  
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ok just checked. the log i posted was at 1:57PM so that would be the slip at 11.442 @129.29 i think.. the one slip was sliced in half and i believe that is the one of the log i have.

the rom on my laptop shows the last rpm i loaded to my ecu and that is 8503 rpm.

also keep in mind i don't know if you seen this post i made or not, but someone asked my tire pressure and i went to check and the one rear tire was 12psi and the others were between 15-18psi.

next time i go to the track i will log each run and be more organized.

i don't know if i hit limiter in that log or not though to be honest with you.

i need to mod my rom for 2byte RPM, the 1byte is maxed out.
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Old Dec 14, 2011 | 10:22 AM
  #70  
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If you are slamming the limiter in first, I suggest you continue to lower your 2step/ Boost pressure on launch until you find that happy medium between bogging and roasting the tires so hard as to slam the rev limiter so hard. Regarding your shifting, the average person completes a shift in 0.5 tenths of a second so obviously there are improvements that can be made here. To help with your shifting speed, I suggest raising your clutch pedal as high as your can without disrupting proper engagement from a stop. Shorter pedal throws will make for faster shifts. Below are a couple of my time slips for you to compare to your own to help you see where the most important areas of improvement are in your case.

Stock turbo. My shift times were logged at 0.2

60ft 1.636
330 4.608
1/8 7.118
mph 97.82
1000 9.271
1/4 11.090
mph 123.55

Fp red shifting logged about 0.15

60ft 1.698
330 4.484
1/8 6.839
Mph 102.84
1000 8.882
1/4 10.596
Mph 131.48

One last note, imo your overall mph is down from what it should be as well. My 131mph pass was with 530whp w/ a race weight of 3,150-3,200lbs.

Last edited by RyuEvoIX; Dec 14, 2011 at 10:30 AM.
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Old Dec 14, 2011 | 11:35 AM
  #71  
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Lots of great info in here already!

I will post back with my thoughts on things with vids to show what had ben discussed in regard to the 1-2 shift and the effects of spinning off the line, bogging, and everything in between.

Thats why I like to record the runs from different angles including in the car to see if what I feel in the car is actually what is going on outside.

Feel free to check my vids in the sig link as I have plenty of in car and other vids to compare.

I've got plenty of vids at home with missed sifts etc. lol

Trust me it gets tougher the more power you make with bigger turbos to find that sweet spot between blazing the tires and bogging.........that's why you may notice in my vids that's I tend to error on the side of coming out easier but smoothly.

It may not equate to killer 60ft.s but I find it easier on parts to get more aggressive than having to back it down .

Gl your evo makes damn good power keep practicing
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Old Dec 14, 2011 | 11:57 AM
  #72  
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Originally Posted by RyuEvoIX
If you are slamming the limiter in first, I suggest you continue to lower your 2step/ Boost pressure on launch until you find that happy medium between bogging and roasting the tires so hard as to slam the rev limiter so hard. Regarding your shifting, the average person completes a shift in 0.5 tenths of a second so obviously there are improvements that can be made here. To help with your shifting speed, I suggest raising your clutch pedal as high as your can without disrupting proper engagement from a stop. Shorter pedal throws will make for faster shifts. Below are a couple of my time slips for you to compare to your own to help you see where the most important areas of improvement are in your case.

Stock turbo. My shift times were logged at 0.2

60ft 1.636
330 4.608
1/8 7.118
mph 97.82
1000 9.271
1/4 11.090
mph 123.55

Fp red shifting logged about 0.15

60ft 1.698
330 4.484
1/8 6.839
Mph 102.84
1000 8.882
1/4 10.596
Mph 131.48

One last note, imo your overall mph is down from what it should be as well. My 131mph pass was with 530whp w/ a race weight of 3,150-3,200lbs.
my race weight is probably around 3400 something. the vd says the cars over 600. i dont know what boost the 131 slip came from.. im gonna guess 31-32psi maybe?

what temps were your runs in? your 330ft is amazing on street tires.

ok i do have the clutch pretty high, i used the jack transmission method where you keep adjusting it out until you cant push the slave cylinder in anymore, then go back in just a bit until you can push it in. so its out almost all the way. (do you suggest i dont push it in all the way?)

i think with no lift to shift enabled in the rom it will put me closer to the average shifter.. (i hope)
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Old Dec 14, 2011 | 12:05 PM
  #73  
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Originally Posted by PATRICK B.
Lots of great info in here already!

I will post back with my thoughts on things with vids to show what had ben discussed in regard to the 1-2 shift and the effects of spinning off the line, bogging, and everything in between.

Thats why I like to record the runs from different angles including in the car to see if what I feel in the car is actually what is going on outside.

Feel free to check my vids in the sig link as I have plenty of in car and other vids to compare.

I've got plenty of vids at home with missed sifts etc. lol

Trust me it gets tougher the more power you make with bigger turbos to find that sweet spot between blazing the tires and bogging.........that's why you may notice in my vids that's I tend to error on the side of coming out easier but smoothly.

It may not equate to killer 60ft.s but I find it easier on parts to get more aggressive than having to back it down .

Gl your evo makes damn good power keep practicing
I will for sure check out your vids, you're a really good driver from what ive watched so far. great job again on your 150mph+ 9 sec runs.

i believe it gets tougher.. my car is probably so easy to get down the track for you guys, because its so responsive.. i would be so bad with a bigger turbo.. i don't even wanna think about it lol. ill work my way up the ladder and maybe one day will be able to handle a larger turbo.

thanks for the kind words. my ultimate goal was 140 when everything is said and done on full weight, but that seems a bit out of reach right now after ive actually got out there and experimented so far. i like to make my goals really hard to reach though.. i guess i like to drive myself nuts. i suppose thats not a bad thing.
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Old Dec 14, 2011 | 01:10 PM
  #74  
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Originally Posted by tscompusa
my race weight is probably around 3400 something. the vd says the cars over 600. i dont know what boost the 131 slip came from.. im gonna guess 31-32psi maybe?

what temps were your runs in? your 330ft is amazing on street tires.

ok i do have the clutch pretty high, i used the jack transmission method where you keep adjusting it out until you cant push the slave cylinder in anymore, then go back in just a bit until you can push it in. so its out almost all the way. (do you suggest i dont push it in all the way?)

i think with no lift to shift enabled in the rom it will put me closer to the average shifter.. (i hope)
My runs were in mid to high 70's ambient temps. Thanks for the compliment. Not bad I suppose for my first manual transmissions vehicle. My best 330ft so far w/ slicks is a 4.18. As far as the clutch pedal goes, your ideal shifting will be pushing in the clutch just far enough out of engagement to allow for shifting into the next gear. The less pedal travel your able to get away with, the better.

Last edited by RyuEvoIX; Dec 14, 2011 at 01:17 PM.
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Old Dec 14, 2011 | 09:24 PM
  #75  
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Originally Posted by RyuEvoIX
My runs were in mid to high 70's ambient temps. Thanks for the compliment. Not bad I suppose for my first manual transmissions vehicle. My best 330ft so far w/ slicks is a 4.18. As far as the clutch pedal goes, your ideal shifting will be pushing in the clutch just far enough out of engagement to allow for shifting into the next gear. The less pedal travel your able to get away with, the better.
that's impressive for your first manual.. you are just a natural quick shifter i guess. it took me so long just to even be consistent without missing gears. a couple years at least lol.

4.18 is really low damn. its not going to put uneven or stress on the clutch if i don't push in all the way? that's gonna take practice to get that down, because im so used to i guess you could say (flooring) the clutch pedal.
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