Date registered: Apr 2006
Vehicle: '90 300 CE, '91 560 SEC, (R.I.P.) '82 300SD (sold)
Location: Sarasota, FL
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Posted this yesterday to the original thread, then saw today the thread was reposted under racing. Anyway, here's my two cents...
Skip the "racing fuel". The benefit of the increased octane over normal premium 91 octane would be minimal at best. If the car was, say a '70 280SL, the racing fuel might help prevent knocking.
Having owned several British sportscars from the '60s and '70s, I found that a blend of regular 87 octane and 100 low lead aviation fuel worked well at eliminating knock and preserving the valves. (100LL av gas has more lead in it than the old leaded car gas used to have.)
What is your experience level at Autocrossing or SCCA Solo 1 or 2 events? I'm asking only because I don't want to insult you by telling you of things that you need to do before racing thru the pylons. I ran in Sports Car Club of America Solo events a number of years ago and won my class in the region for 5 years. This was in several different classes in different cars.
First, and probably the most important thing is to increase your tire pressures. The hard cornering of slalom racing can rip an underinflated tire from the rim. To get the ideal pressure amount needed, coat the sidewalls with liquid floor wax. Then after a few hard turns, take a look. The shine of the wax on the sidewall will be worn off where it comes in contact with the pavement. The ideal is not to go past the edge of the tread where it wraps over the side. I used to run from 40-50 lbs. depending on the car. Usually something like 46lbs. front and 40 rear.
The second thing is to take everything out of the trunk including the spare and jack. The idea here is to lighten the load plus not having stuff like your tools, CD collections and empty bottles and cans flying around back there.
Third, again for weight reasons, run with the absolute minimum of fuel on board. Just enough so that you won't run out or uncover the fuel pickup in corners.
There are several little things that can be done as well. Such as removing all the floor mats, again for less weight, positioning the passenger seat as far back as possible and reclining it and putting all the windows down. The last two are to lower the center of gravity as much as possible.
If allowed before the start, try to walk around the course to visualize the correct line needed around each corner. (late entry, early entry or transitional.) It also helps to keep from getting lost in a sea of orange traffic cones.
Good Luck! Have fun. Hope this helps you.
Gulf Coast Coupes
'90 300CE w/ 17" AMG Monoblock wheels, H&R springs, euro headlights, clear corners, dual exhaust (no cats)
'91 560SEC w/ 17" 3pc. AMG wheels, clear corners, no cats â€“ R.I.P. (drowned Jan. '09}
'82 300SD sold
Last edited by JFlyer; 10-04-2006 at 11:29 AM.