S281 vs 427R

i think i can 12 sec out of it a least maybe lower

roushmustang427r wrote:no track time just street runs

Thats cool....ya gonna bring it down for the Get Out of The Cold event?

i want to. but i also wanna take it in the get the boost turn up to 9 psi then i wanna be looking at 11 sec

i think im running 3 right now

roushmustang427r wrote:i think im running 3 right now

Three what?

3 psi

roushmustang427r wrote:3 psi

Is your car broke? No way it suppsed to run 3psi stock..lol.

i have no clue from the dealer that what he said?

how much do you think

id say its probably at 9 or 10 psi stock.

i will check up on that but i think its a lower number

roushmustang427r wrote:i will check up on that but i think its a lower number

Looks like it may be 6 psi.

roush performance siad it 5 51/2 with the boost upgrade it goes to 9 maybe 10

roush also said the engine is strong enough for 17 psi tops

badass

roushmustang427r wrote:roush also said the engine is strong enough for 17 psi tops

NO effin way. Enless the motor has forged internals.

that what they claim the tipping point is on the motor

Not on Ford internals its not. I can't remeber if the 427R gets the upgrades or not. If so then 17 is prob about right.

maybe i just stating what the roush guy told me

i think my car is 9 psi stock...dont quote me tho

zporta wrote:i think my car is 9 psi stock...dont quote me tho

I just did!!


BTW, finally watch the vid...pretty cool, nicely shot and edited too!

Says nothing about the internals being upgraded. I believe that onl happens when you step up to the P-51 edition with 500+ HP. I also believe that the power ratings for these cars are at the flywheel. That would put RWHP near 400 which if driven right is very safe for the 4.6.

The heart of the 427R's modifications is the ROUSHcharger
forced-induction system that is installed on the 3-valve SOHC 4.6L V8.
Utilizing an Eaton positive-displacement supercharger and a
water-to-air intercooler integrated into the intake manifold, the
system applies approximately 6 PSI of boost to produce 427 HP and 391
lb-ft - a useful increase of 127 HP and 71 lb-ft over the stock
numbers. The system includes a vacuum-actuated bypass valve that routes
air around the compressor at part throttle to increase efficiency. A
heat exchanger for the intercooler is nestled behind the front fascia
and uses a dedicated coolant loop (plumbed along the passenger's side
of the engine) with an electric circulation pump. The engine's new fuel
and spark demands are satisfied via a recalibrated OEM powertrain
control module. Premium fuel is required, of course. The stock exhaust
manifolds and catalytic converters dump spent gases into the ROUSH
stainless-steel cat-back system.

thats great info im gald you posted that so with that im swaping headers and x pipes now does any know which i should go with?

roushmustang427r wrote:thats great info im gald you posted that so with that im swaping headers and x pipes now does any know which i should go with?

Just saw and heard the video clip with Kooks LTs, catted X and Pypes mid mount system that sounded like absolute sex yesterday

it does sound good but i dont wanna lose my roush mufflers and which system will give me more hp/tq