My current streetbeast, 68 RR I don't think could do 10's
it's not set up that way, "more of a drag car, in search of a corner"
might run mid 11's, if it could hook, I don't know, it serves it's purpose now
BUT;
my former silver 68 RR could do best of 9.77 @ 135 N/A
& w-300 shot of N20 8.58 @ 156 best 100* day Test & tune
I drove some 12k miles on the street around Sacramento Co.
before I sold it (2007), it'd run 9.90's @ 130+ consistently
(from what I understand, it still does too)
479ci/383 full roller, mildly ported RPM alum heads, TF 3800 stall-4200 flash
on 315 drag radials & CalTracs, Flowmasters Delta 50 mufflers & tail pipes
{
I think the camshafts, cylinder-heads, tires & shocks tech. are all far better today too}
with 3.73:1 - I also had 3.91:1, 4,10:1 & 4.30:1 gears
depending on what combo at the time, tried them all
it miled per hour better with the 3.73:1,
but 60ft better with the 4.30:1
about a 2 tenths & a 1/2 different, in best et's, N/A no matter the gears
especially on juice, it's more dependent on weather, track conditions,
prep or the heat/sun cooked tracks etc.
but the mileage with the 4.30:1 sucked ***,
16 gallon cell, 320 gal. per.hr. bypass fuel system,
maybe go 120 miles on a good day, without running out of fuel
{
I liked to use good fuel, but it'd run relatively good on 91 oct. swill we have out here too,
so I could still stop in at gas stations & fill up, just wasn't ideal, carried oct. boosters too}
3.73:1 wasn't much better, but it could do freeway speeds
"without screaming it to the moon all day"
I think I can do a bit better today, If I had the budget & to want to do it...
when I was much younger I had many cars that were 10 sec.
or better driven on the street regularly,
even cruised them downtown Walnut Creek, fri. & sat. nights
we all drove our cars to the track...
I had a brand x car that'd run 7's on juice, drove on the street
every so often, not like it was my daily driver, a bit radical for that ****
it could idle along & slip the converter, but it had tags & insurance, slicks
people would ask about my slicks on the street all the time
I'd just say "those are my street tires"
I wish I could've drove my Altered on the street
Back in the day, 30-40 years ago
a bunch of me & my buds would drive our racecars on the street,
before they were lettered up etc.
we'd take them out to Encino Grande, Safeway Parking lot
a local gearhead hangout back then, in Concord area,
get a little fishing action, after the fri. & sat. cruise nights...
It's not a new thing,
many people have been doing it for a long, long time...
I mostly grew out of that, started building cars for the track only
I had too much to lose etc.
or build for a specific type of purpose, not always straight line stuff...