dont follow the SRT forums, but was wondering if anyone has taken the new coupe to the track. What was the mph.
ps - I saw a vid of the new Z running an 11.8 but only 116. I am sure there are others out there running low to mid 120's like I would think it is capable of doing.
Last month I took my brand new coupe (398 miles upon entrance to the track) to Gainesville. It ran 123.7 mph. Best e.t. was only 12.30, but the track was aweful. It still got our local VCA trophy for quickest stock SRT.
Last month I took my brand new coupe (398 miles upon entrance to the track) to Gainesville. It ran 123.7 mph. Best e.t. was only 12.30, but the track was aweful. It still got our local VCA trophy for quickest stock SRT.
JEDI
Isn't 398 miles well below the recommended engine break in period?
Yes this works on cars as well... really well
One thing to note as you read it, it's not just a "floor it" deal. Rather a step by step process in a certain enviorment to complete the task.
Yes this works on cars as well... really well
One thing to note as you read it, it's not just a "floor it" deal. Rather a step by step process in a certain enviorment to complete the task.
That is very interesting. I was unaware you could do that.
I have broken in my last two Vipers in a similar fashion, both with great results. Indeed, my current Viper was broken in on the Texas Motor Speedway at approximately 160 mph by an ex NASCAR driver...
Not a coupe, but did pull a 12.04 @121 on a slippery track with a 1.98 60'...
Babying a car during break in seems pointless to me. In my experience with new cars, the easier you drive them the slower they are as the miles stack up. Cars that are run hard tend to run better....if anything goes wrong you have a warranty..
I used the motoman method to break a newly rebuilt motor with headwork on the dyno with great results. Compression test after a few thousand miles were right where they should be and less than 1% deviation across the board.
EDIT: for clarification, this was not a Viper motor.
For new viper owners it probably isn't a bad idea. If you don't know how to handle the car then it makes sense to baby it for a few hundred miles before you start getting on it.
As for engine wear; The engines are probably dyno tested before they are put into the cars to make sure there isn't any problems.
For new viper owners it probably isn't a bad idea. If you don't know how to handle the car then it makes sense to baby it for a few hundred miles before you start getting on it.
As for engine wear; The engines are probably dyno tested before they are put into the cars to make sure there isn't any problems.
Break it in, like you want it to run. If you want a slow car, then baby it. Some moron cam up with the "easy on the break in period" theory....
Thanks for calling me a moron. Now for all you experts how many have torn down engines that do WOT testing right after assembly? Once you do you will not follow that advice. That fast break-in means hot temps for the rings and piston skirts. That leads to scuffing the bores. OEMS test for that exact condition. But the resulting engine parts are not in very good shape.
Also note that studies like you may read on the internet are fairly old and were done with high peak honing. Most modern engines are plateau honed, which means the bore walls are already very close to a worn in surface when they are made. No big surface peaks to wear off. Piston clearances are getting tighter and tighter, ring tension getting lower and lower. All directionally wrong for running WOT right out of the box.
The most harmful aspect for bore/piston break-in is too much heat. Heat is the byproduct of piston speed and cylinder pressure. So high speed and high load should be avoided during break in. Also avoid light load and high speed as that may result in ring flutter, which could lead to poor wear characteristics.
Course you could completely ignore me as a moron with only 23 years in engine design and development engineering.
keep in mind that the factory warrants these vehicles for quite a while. They want to protect the integrity of their investment. In reality, most racing engines get about 15 minutes of idling with short bursts of accleration before they are put on the track. 15 minutes....thats it.
My 398 miles was plenty of break-in..IMO. It now has 520 miles and will be recieving the typical BTR 9 second package upgrades over the next few months. At which time it will probably go 150+ in the 1/4 with maybe 700 total miles since new.
Linear Mode
