Hello and good day all. I live in a place where the track reaches 6000+ elevation. Loosing a second off a stock car 1/4mile time is not abnormal. My stock srt6 ran a 13.9 all the time as did my friends stock srt6. My mod list goes with the 1/4 mile as I ran the track after each mod. Needswings single CAI with eurocharged tune car dropped to a 13.5. Installed 178mm pulley w/psk and got a consistent 12.9-13.1 on multiple days and conditions at track.I Installed custom intake manifolds from needswings and got Inmotion tune as suggested for custom manifolds,The last time I went to track was last year, and ran a 13.7 best because of a y-pipe leak, after custom manifolds installed. Needswings helped me find the leak we fixed it. Never got a chance to get back to track that year. My best time with all my performance parts has been a consistent 12.9-13.1 just by smashing the gas pedal off the line.(and this was before the custom manifolds installed and before the inmotion tune) Today my best was a 13.5 and could not beat a 2.2 60 foot all day. Trap time constant 105.5-106mph. Smashing the gas, and
anything over 1100rpm would spin my tires to excess to turn on traction control. Tried feathering the gas pedal with no luck.
Could my rear-end be weak? Monday car goes in for smoke screen test again to check for leak, which I hope there is one.
I will let you know if we find a leak, and what else we see. Any input, advice, suggestions? please feel free im open ears. Thanks

 

as im learning the hard way you need a custom driver mod! adding the manis and other parts has increased the low end torque on the car and as a result your spinning not winning. you have to relearn how to launch the car to lower the 60 ft time which lowers the et. its a learning curve

 

Im sure know one wants to admit its there driving and I have been questioning this. If you look into launchin the srt6 it smash the gas, rev to 1100rpm smash the gas 1200-1500 rpm repeat. Unless you think truly feathering the gas pedal makes a difference and Ive adjusted fine with all my other mods till now. If your learning that the hard way, sharing your experience may help........ If its on a similar vehicle. Thanks

 

a hard launch on the srt-6 at 1500 rpm then smashing the gas will get you a lot of spin and not much win. rolling into the throttle (not feathering) will get you a 1.7 60ft and a better et. remember you get over 80% of your torque at 2000 rpm. when i started racing my slk32 it was with a homemade intake a c3 pulley no tune. p/b was 12.6 at 113 mph in 90* heat . (3 yrs ago).today with more hp and mods then you would believe ( c3 full tune n/w manis,catch can, polished y pipe, modded fuel rail, lsd, tcu mod, drag radials blah blah ) i ran a 12.2. only a .4 inc in 3 yrs because i have so much power now getting it to the ground isnt the cars problem its the drivers problem. hence the driver mod

 

I found racing the 1/4 mile to be just like golf. I have a pretty good drive so at the next tee I am really going to nail it,and whiff im killing worms. At the track I make a good run so the next run I load up a it more rpm ,and whiff I'm spinning put down a 2.3 60' the traction control kicks in and I run 1/2 second slower.

 

drag racing....is a fun sport... the track conditions, the weather conditions, air pressure in your tires, lane choice....are all usually forgotten elements. Most are concentrating on the tree itself, rpms at launch, and the other guy....lol... Everything must be considered, and you do the best with what you bring. Same tires might not work on different tracks, and so on... I personally roll into the throttle, but here's something most wouldn't think of doing, when traction becomes a problem. Without letting off the throttle, light pressure on the brake for an instant, no more... Anyway.. in your case altitude is killing you. I believe I had Matt's stock SRT at 13.1 on a hot 90 degree day. Have fun with it...

 

Sure enough you did...never did get a chance to top that. It was either the extra 20 years of experience you had.

...or the fact that it went to the EC shop for some new toys almost immediately after.

 

I have a lot 1/4 miles under my belt...but your car did very well on a hot day, with stock tires, and stock engine...Matt... She is a runner...but of course it is one of the fastest colors....

 

Did this EXACT thing at the track yesterday...

 

She is a runner for sure...she is/was one of the fastest 1/4 miles times stock.

..and with the goodies that are going on in the next couple weeks, she should be impressing once again. Just need to find a driver that weighs half of what I do. I am looking forward to once everything is installed in a couple weeks. I'm sure I will post a thread once it is going.

 

get it on a dyno and check egts and a/f ratio. You might have to get a different tune since your car can inhale a lot of air easily now. I'm not too familiar with the manifolds but it's definitely letting you Injest a lot more air. Car should be alright with the stock fuel system but members have upgraded the fuel pump and it has helped. Try a different track also.

 

Stock tires will kill any car if the track isn't prepped right. I had over 10 runs this past Saturday at PBIR and didn't spin once. My MT ET Street tires (Biased not radials) on lightweight 16" CLK wheels stuck like glue. Best 60' for the day was a 1.72 . They are basically slicks with tread and are the best racing tires I've ever owned and am still able to drive on the streets as long as they are dry. Jim and his V8 baby also stuck like glue with the same tires. I have to try these tires at Orlando Speedworld to see if they stick there also.

 

Got any cool vids from the 17th?

 

Yep, Jim posted them in this thread...

https://www.crossfireforum.org/forum...self-pbir.html

 

So my smoke screen test came back fine no leaks, I ordered the Zeitronix kit in hopes to be able to see more of whats going on. Car runs great but First gear will not red line (even when starting from roll with no spin). I have two srt6's one stock and my modded one listed above. For some reason my stock srt6's red line goes further then my modded one tuned by inmotion. Any ideas? thoughts? will have Zeitronix by weekend I hope.

 

What kind of tires do you use? and where can I find some please?

 

I use Mickey Thompson ET Streets (non radials) and the size is 26X10.50-16LT on CLK lightweight 16" wheels. I know Rob at Needswings sells them.

 

How does the rear end hold up to those slicks??How many runs do you have on it with them? I had drag radials on my 135I It made a huge difference like .4 off the 1/4

 

You just answered your own question. Tuned by Inmotion. One is a stock tune, and the other altered. Might need to update your tune with whatever tuner you prefer. Sometimes, a throttle reset is in order as well, and then a few hard runs for the car to re-learn....just a thought...

 

Just got my Zt-2 data logger and started getting some pulls on it.