What's happening to my trap speed? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

SCHUSS · 09-09-2017, 07:45 AM

Went to the strip yesterday, beautiful day, upper 60's, very little wind. I normally trap in the 127 range, yesterday only 123ish. 60 ft normal for me, 1.8-1.9's (still working on that!) 10 runs never over 123. The only change made to the car is a interchiller installed which should be giving me more power and trap. IAT2 was 55 or so at launch 100 or so at the end. My buddy was there and running his normal traps and ET's. Any ideas what could be going on?

frankwjr · 09-09-2017, 08:14 AM

...runnin out of fuel? r u data loggin?...have a wide band? cooler iat SHOULD/MUST be compensated with additional fuel...check plugs after a run....good luck and report back!

btw..wats your rear tire setup? 60 could be lower? unfortunately I gotta wait until the 24th when my track has it's next T&T...now that I hope I've figured out my launch the 60 WILL(lol) improve and with the cooler air....this sh!t is fun!

SCHUSS · 09-09-2017, 08:34 AM

Quote:

Originally Posted by frankwjr

...runnin out of fuel? r u data loggin?...have a wide band? cooler iat SHOULD/MUST be compensated with additional fuel...check plugs after a run....good luck and report back!

btw..wats your rear tire setup? 60 could be lower? unfortunately I gotta wait until the 24th when my track has it's next T&T...now that I hope I've figured out my launch the 60 WILL(lol) improve and with the cooler air....this sh!t is fun!

Not data logging. Rears are MT ET street S/S DR's. Yes my 60 should be better, only go to the strip once maybe twice a year so seat time is an issue. So having cooler IAT2 is killing me without a new tune?

frankwjr · 09-09-2017, 08:51 AM

how much more efficient is the new inter-chiller? since that is the only change that is where I would be lookin...plus with your build/investment data log would be a good insurance policy!

what size rear dr's? with your power you might need to do a 15' conversion to get the most out of it off the line...

SCHUSS · 09-11-2017, 07:49 AM

I hope to go back to the strip in the next few weeks, I'll run without the chiller and see if my trap speed comes back. What do I need to start data logging? Any one else have any ideas?

frankwjr · 09-11-2017, 08:32 AM

inexpensive is SCTX4 hooked to a laptop...once I get a way to locate/secure a laptop in the pass seat will start...HPtuners has a handheld? More peeps could chime in...

SCHUSS · 09-29-2017, 09:18 PM

Went to the strip again today, first few runs without the interchiller, trap speeds still low, 122/123. Anybody else want to chime in?

WoodBoss · 10-02-2017, 07:41 AM

You can capture one data log on the SCT X4 by itself if you don't have a laptop. I do it all the time. Without a data log you are shooting in the dark.

acammer · 10-02-2017, 08:06 AM

Let's see before and after slips. Could be it's making all the power, but losing ground early or something. Picking the whole time slip apart can be very telling.

And couldn't agree more on the data logging. If nothing else, you can take an OBDII-bluetooth dongle, run a screen capture on a cell phone, and record data from the Torque app.

HOJO · 10-02-2017, 08:51 AM

Has there also been a change in your ET as well? What was your previous ET as well as your most current? If you posted it i missed it, sorry.

SCHUSS · 10-02-2017, 09:00 AM

Thanks for the input guys. I'll get a SCT X4 and figure out how to data log for next year. For time slips, what would work? Similar 60' would be the key correct? My ET has been slower with similar 60', although I got my personal best this time, it was 11.368 @ 122.72 with a 1.72 60. The 60' on my previous PB was 1.89, with a 11.462 @127.35.

acammer · 10-02-2017, 12:45 PM

Quote:

Originally Posted by SCHUSS

Thanks for the input guys. I'll get a SCT X4 and figure out how to data log for next year. For time slips, what would work? Similar 60' would be the key correct? My ET has been slower with similar 60', although I got my personal best this time, it was 11.368 @ 122.72 with a 1.72 60. The 60' on my previous PB was 1.89, with a 11.462 @127.35.

At a minimum it would be good to see the 60', 660' ET and MPH, and 1320' ET and mph. The other ETs can help as well - so all the data is best.

We're going to be focusing in on the 660' mph, and the difference between that and the 1320' mph, to evaluate how the car "back-halves" the track. For example, if you're 660' mph is 5mph low compared to the 127mph slip, and the car is picking up a similar amount of mph on the back half, then that points to something going on early in the run, maybe knocking the tires off bad on the 1-2 shift for example, something not power development related.

If the car has a similar mph in the 660' to the 127mph slip, but shows a lower gain in overall mph from 660 to 1320, then that is pointing to the car laying over power wise.

Pro Stock John · 10-02-2017, 01:48 PM

I would log the passes to figure this out. Could it be belt slip?

SCHUSS · 10-02-2017, 05:30 PM

Here you go, very similar 60' to compare apples to apples, similar weather too, high 50's. Left #13 right #27.

09-09-2017, 08:51 AM	#4
frankwjr Drives: 2010 SS 2SS M6 Join Date: Aug 2016 Location: Smithsburg, Md. Posts: 2,446	how much more efficient is the new inter-chiller? since that is the only change that is where I would be lookin...plus with your build/investment data log would be a good insurance policy! what size rear dr's? with your power you might need to do a 15' conversion to get the most out of it off the line... __________________ 2010 SS 2SS M6 - Tune by RDP dynoSteve!(Woot) - Daily Driver - *150K!* - All work by me...

09-11-2017, 07:49 AM	#5
SCHUSS 709 RWHP & 677 RWTQ Drives: 13' HPE 800 ZL1..... IOM vert, M6 Join Date: Feb 2013 Location: South Windsor, CT Posts: 1,140	I hope to go back to the strip in the next few weeks, I'll run without the chiller and see if my trap speed comes back. What do I need to start data logging? Any one else have any ideas? __________________ 11.34 @ 124.88

09-11-2017, 08:32 AM	#6
frankwjr Drives: 2010 SS 2SS M6 Join Date: Aug 2016 Location: Smithsburg, Md. Posts: 2,446	inexpensive is SCTX4 hooked to a laptop...once I get a way to locate/secure a laptop in the pass seat will start...HPtuners has a handheld? More peeps could chime in... __________________ 2010 SS 2SS M6 - Tune by RDP dynoSteve!(Woot) - Daily Driver - *150K!* - All work by me...

09-29-2017, 09:18 PM	#7
SCHUSS 709 RWHP & 677 RWTQ Drives: 13' HPE 800 ZL1..... IOM vert, M6 Join Date: Feb 2013 Location: South Windsor, CT Posts: 1,140	Went to the strip again today, first few runs without the interchiller, trap speeds still low, 122/123. Anybody else want to chime in? __________________ 11.34 @ 124.88

10-02-2017, 08:06 AM	#9
acammer GPI Sales Consultant Drives: 2011 Camaro 2SS SGM Join Date: Jul 2016 Location: Weedsport, NY Posts: 2,794 View My Garage	Let's see before and after slips. Could be it's making all the power, but losing ground early or something. Picking the whole time slip apart can be very telling. And couldn't agree more on the data logging. If nothing else, you can take an OBDII-bluetooth dongle, run a screen capture on a cell phone, and record data from the Torque app. __________________ GPI Max Package 2.0: Brodix BR7 heads/GPI porting, MAX3 cam, ST2116LSR, BSR Max Lift rockers, LS7 LSXR with 103mm TB, Vararam OTR, Mcleod RXT, G-Force/Strange 9" IRS setup with 4.63 gear. 551whp, 11.1@124mph. *Got a question about a GPI product? Feel free to shoot me a message!*

09-09-2017, 07:45 AM	#1
SCHUSS 709 RWHP & 677 RWTQ Drives: 13' HPE 800 ZL1..... IOM vert, M6 Join Date: Feb 2013 Location: South Windsor, CT Posts: 1,140	What's happening to my trap speed? Went to the strip yesterday, beautiful day, upper 60's, very little wind. I normally trap in the 127 range, yesterday only 123ish. 60 ft normal for me, 1.8-1.9's (still working on that!) 10 runs never over 123. The only change made to the car is a interchiller installed which should be giving me more power and trap. IAT2 was 55 or so at launch 100 or so at the end. My buddy was there and running his normal traps and ET's. Any ideas what could be going on? __________________ 11.34 @ 124.88

09-09-2017, 08:14 AM	#2
frankwjr Drives: 2010 SS 2SS M6 Join Date: Aug 2016 Location: Smithsburg, Md. Posts: 2,446	...runnin out of fuel? r u data loggin?...have a wide band? cooler iat SHOULD/MUST be compensated with additional fuel...check plugs after a run....good luck and report back! btw..wats your rear tire setup? 60 could be lower? unfortunately I gotta wait until the 24th when my track has it's next T&T...now that I hope I've figured out my launch the 60 WILL(lol) improve and with the cooler air....this sh!t is fun! __________________ 2010 SS 2SS M6 - Tune by RDP dynoSteve!(Woot) - Daily Driver - *150K!* - All work by me...

10-02-2017, 07:41 AM	#8
WoodBoss "Old School" Drives: 2010 2SS L99 Join Date: Apr 2015 Location: Sherrills Ford, NC Posts: 1,295	You can capture one data log on the SCT X4 by itself if you don't have a laptop. I do it all the time. Without a data log you are shooting in the dark.

10-02-2017, 08:51 AM	#10
HOJO Drives: 2014 Camaro SS/RS 1LE 1967 Camaro Join Date: Oct 2013 Location: Fort Wayne, IN Posts: 873	Has there also been a change in your ET as well? What was your previous ET as well as your most current? If you posted it i missed it, sorry.

10-02-2017, 09:00 AM	#11
SCHUSS 709 RWHP & 677 RWTQ Drives: 13' HPE 800 ZL1..... IOM vert, M6 Join Date: Feb 2013 Location: South Windsor, CT Posts: 1,140	Thanks for the input guys. I'll get a SCT X4 and figure out how to data log for next year. For time slips, what would work? Similar 60' would be the key correct? My ET has been slower with similar 60', although I got my personal best this time, it was 11.368 @ 122.72 with a 1.72 60. The 60' on my previous PB was 1.89, with a 11.462 @127.35. __________________ 11.34 @ 124.88

10-02-2017, 01:48 PM	#13
Pro Stock John Writer Drives: 2010 SS / 1967 Camaro Join Date: May 2009 Location: Chicago, IL Posts: 7,216	I would log the passes to figure this out. Could it be belt slip? __________________ PROJECT HEAVY CHEVY Camaro Now: Mods for the Masses Part I \| Part II 13.15@106 1.95 \| 100% Stock 12.37@112 1.85 \| + Kooks Headers/Cats + 20" 555R + CAI + BW TB + UDP + Tune 12.06@113 1.70 \| + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune 11.84@115 1.59 \| + 3.91s + Race Star 17x7 Fronts 10.90@125 1.47 \| + GPI VVT Cam + BW Ported Heads + CD 3800

10-02-2017, 05:30 PM	#14
SCHUSS 709 RWHP & 677 RWTQ Drives: 13' HPE 800 ZL1..... IOM vert, M6 Join Date: Feb 2013 Location: South Windsor, CT Posts: 1,140	Here you go, very similar 60' to compare apples to apples, similar weather too, high 50's. Left #13 right #27. Attached Images __________________ 11.34 @ 124.88 Last edited by SCHUSS; 10-03-2017 at 07:35 AM.