There's been a lot of good talk about carbs and other common mods. I have a
pretty standard 351w with Edelbrock Performer series heads, cam, intake,
timing chain, stock ratio roller rockers, with an MSD 6 box, billet
distributor (pro-billet, NOT the ready-to-crap one), wires, and NGK plugs
coupled to a stock 95 Mustang tubular shortie headers (which had to be
modified to fit), 2 1/4 exhaust (long story why not 2.5") into a Bassani SS
muffler that is the closest match to a stock B muffler I have ever seen.
The Holley 4v, dual feed, 650 vac sec w/elec choke is sitting on an
Edelbrock heat insulator and 1/2" alum divided spacer all under a 13" air
cleaner tucking beneath the stock hood. The Holley has been rejetted down
and the quick change spring kit uses the second to the weakest spring for
the sec., offering no bog at WOT. Mech advance (the MSD pro billet small
head distributor offers both mech and vac) has been set to 28deg and vac
lockout in order to provide good low end torque easily spinning the tires
with the stock FMX tranny with shift kit readily chirping the tires in
second during moderate acceleration and quickly started with a Tilton
powered by an Optima deep/starting batt.
However, in retrospect, it turns out that a 625 or even a 600cfm may have
been a better choice for drivability and fuel consumption without detracting
from the performance significantly. This is a daily driver, and without any
mod to the bottom end, a 5k rpm redline pretty much maxes the usability of
this set up. I also think a vibration dampener and 2.5 exhaust ( the stock
is 2" in, 2.25" out) would have been a better way to go. Fuel economy is
not great (the holley still demanding some tuning) and I think the Edelbrock
series may be easier to use right out of the box.
The point of all this is that unless you are doing more extensive mods, such
as stroking the crank, adding new pistons, rods, etc, along with a more
radical cam and intake, I believe from my own experience that a 600cfm is an
optimum fit for this mod, and a 500-525cfm max. for a bone stocker. Just my
humble opinion going into the great and ever growing opinion pile.
As for fear of getting smacked during my daily drives, hey shit happens and
frankly, I'm more concerned about ME than the car in an accident and the B
is still one of the safest cars on the road so why be nervous?
stephan #2821
PS, there have been some other mods, like cooling, a/c, etc.
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