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  1. J

    Who races SCCA solo?

    The non-ACR, pre-2008 Vipers are eligible for "Super Stock" class, against the C5 and C6 Z06, Lotus Elise, and Porsche 996 GT3. The 2008 Viper, and both gen ACRs, go straight to "A Street Prepared", a class of cars with modifications like larger than stock wheels, upgraded suspensions, and...
  2. J

    Lower Your Ride Height Using Factory Specifications

    You can't lower a stock SRT-10 (non-ACR). The alignment procedure involves putting a bunch of sandbags on the seats to simulate having an "average load" in the car. That extra weight compresses the springs a bit which you could argue "lowers" the car, the purpose being to have the car aligned...
  3. J

    Mount and Balance Shop in SAN DIEGO

    Hi Sundevillover, We must be neighbors - did you go to Mt. Carmel? Anyway, I have had very good luck with the Discount Tire on Balboa & Genesee. They're a bit further than the Miramar DT, but the guys there are all very cool and will take good care of you.
  4. J

    Hennessey 2008 ACR in One Lap of America ..... looking good !!!!

    Guys, do you not understand the difference between a traction or stability control system, and a differential? Just because the car had a stock '08 diff, does not mean that it could not have also been equipped with a racing-caliber traction or stability control system. The "electronic diff"...
  5. J

    Hennessey 2008 ACR in One Lap of America ..... looking good !!!!

    Can somebody get Chris Winkler to post in here directly regarding the rumors around the traction control bit? See the link below posted by Mark DaVaia. You have to take everything you read on the Internet with a grain of salt, and sure, you could argue that he's trying to protect his ego after...
  6. J

    Why doesn't Dodge more actively promote the ACR Viper?

    Road & Track already did a comparison test of the ACR. It was paired with a base '08 SRT-10, along with 911 vs. GT3, and Gallardo vs. Superleggera. R&T actually had to use the pre-production test mule, since the regular car wasn't out yet. Now that production ACRs are hitting the streets...
  7. J

    J-Rho autocrosses an SRT-10 in SCCA SS class

    Hi Larry, Nothing to report as of late. Been very busy with work and buying a new house, so time and funds for racing have been less than ideal. I plan to attend a local event later this month, another local event in July, the Wendover ProSolo in August, and the National Championships in...
  8. J

    Hennessey 2008 ACR in One Lap of America ..... looking good !!!!

    If anybody has information about the trailer hitches used by the One Lap Vipers, please share! :)
  9. J

    VIPER Friendly Tracks in Cali?

    The bowl at Cal Speedway has been known to eat motors; the infield course is fine though.
  10. J

    2 Questions

    For those that learn from pictures/graphs- Below is a thrust-in-gear chart comparing the values for a 2008 SRT-10 and 2006 C6 Z06. I got lucky and found a dyno pull of each car, stock, on the same dyno. Basically, the higher the line on the Y axis (longitudinal "G" force), the harder the...
  11. J

    2 Questions

    GR8 ASP's concept is how you translate the output of your car's engine into the same form they use for jets, pounds of thrust. :) If anyone cares to post a dyno chart of their car, along with that of a competitor's, I can graph it out for you. Gearing and tire sizes, if non-stock, are...
  12. J

    just a goofy thought about granny aids on Vipers...

    Would be nice if it defaults to off. I like that I can hop in my car and it's ready to go. Nanny-tech wouldn't be so bad if you didn't have to press and hold different buttons and do all sorts of 'secret handshakes' just to get the car to behave properly. Or maybe just have two ignition keys...
  13. J

    Lightest rims in 18 x 10 and 19 x 13?

    I'm not convinced the sidewinders are as light as many believe, at least those front weights. Who knows though. Yes on the offset, 1/4" less than stock, increasing track width front and rear. The pics above in this thread are of them installed, more pics and stuff here...
  14. J

    OEM wheel weight & offset, & CCW wheel ?

    http://forums.viperclub.org/2481649-post34.html
  15. J

    Nissan GTR Versus The 08 Viper

    I think the results reached in the Road & Track test are quite bogus, and was not afraid to tell them I thought so (warning, long-winded posts here): Biased test drivers - Road & Track's Reader Zone - Road & Track Forums That said, I think in the hands of the "average" weekend track driver...
  16. J

    Hoosier R6 versus Michelin Cup heat cycles

    Total life will depend a lot on how hard you drive them, what sort of tracks you're on, the shape of your car, etc. The Michelin PSCs will outlast R-compound Hoosiers in my experience. Both tires need a little time (a lap or two, maybe three in Canada) to get heat into them; you'd have to go...
  17. J

    Nissan GTR Versus The 08 Viper

    I have seen some advanced TC systems featuring advanced launch control features which help to limit wheelspin in drag-style starts. If the vehicle has so much grip that it is not traction limited at the start, (what a nice problem that would be!) then TC will not help. Most production-car TC...
  18. J

    J-Rho autocrosses an SRT-10 in SCCA SS class

    The shoepolish looks ok on a teenager's Civic, not so cool on a grown man's Viper. :) I highly recommend getting the car aligned before the school. I think it'll make it a lot more fun, and will actually be nicer to your tires overall. The alignment I use would be good, though you may want...
  19. J

    J-Rho autocrosses an SRT-10 in SCCA SS class

    You can do the shoe polish thing if you like. If you look closely though, you should be able to see how far the tire is rolling over. What alignment are you running and what's the suspension setup? How about wheel/tire sizes?
  20. J

    J-Rho autocrosses an SRT-10 in SCCA SS class

    Hi Rich, I don't know much about the PS2s, I've only ever had the old-school runflats or Hoosiers on my car. In any case, I don't recommend running those tires that highly inflated on your car, especially in the rear. I'd try something like 32 rear, 37 front. They'll go up a few pounds as...
  21. J

    J-Rho autocrosses an SRT-10 in SCCA SS class

    Front Camber: -2.5 Caster: 6 degrees Toe: 0 Rear Camber: -1.25 Toe: 1/8" in
  22. J

    J-Rho autocrosses an SRT-10 in SCCA SS class

    The ProSolo this past weekend went...okay. Still getting used to the car. The new diff fluid worked fine - it's still not nearly as good as it was before with the race diff, but the different fluid definitely worked better, and overall the diff felt like a regular viscous. Biggest problem...
  23. J

    Tried different diff fluids to change its behavior?

    Hi Rob, I looked at that fluid, Royal Purple makes great stuff. Unfortunately (for me) it contains limited slip additive already mixed in, as do a lot/most of the better gear/diff fluids. I'm moving towards fluids that don't have any of the frictoin modifier, or fluids specifically designed...
  24. J

    Tried different diff fluids to change its behavior?

    Switched to J-Rho's Diff Cocktail 2.0, seems to lockup a bit better on the street, will see how it works this weekend. It's a 2-day race so if Saturday is not going well, can switch to version 3.0 for Sunday. The racing diff that was in the car belongs to the car's original owner, and since...
  25. J

    Tried different diff fluids to change its behavior?

    C'mon, anybody? :( Would really be interested in people's experiences here. Anybody do a fluid change and forget to put in friction modifier? Any gotchas on doing a fluid change on an '04 SRT-10?

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