stock npi heads p/p?

Daywalker · Nov 10, 2007

I went with a P&P NPI setup, and I've managed to make 422HP/410TQ. That's with a Livernois PI intake kit, comp XE270AH cams, and a Procharger...

imp2:

voidfinger · Nov 10, 2007

Johnny Langton said:
voidfinger said:

ok so you running a built intake with npi p&p heads... with a comp 270 i think... do you have higher CR than stock or somthing.. i'm just having a hard time seeing a heavy tbird with a 4k stall doing a 12.1 .... It's not that i'm doughting but there is something there that not clicking with me lol. :thumb:

Click to expand...

My car is a real street car.
Leather seats,CD stereo with 3 amps and a single 10" sub.
4.30 gear
4000 stall converter
Kooks mid-length headers
2.5" Magnaflow duals with cats
Ported Bullitt intake
Ported NPI heads
Comp 270AH cams
Steeda underdrive pullies
It's an aluminum Explorer block
Ross flat-top pistons with approx 10.5:1 CR
Cast Mark VIII crank
Manley Promaster I-Beam rods
Billet oil pump gears in a 2V pump from TSS in Orange,Tx
80mm '00 Lightning truck MAF
Custom tune
Custom air inlet tube
Stock suspension(most of it has almost 250K miles on it,and the only parts that are different are just stock replacement pieces)
NO power adders
and it weighs right at 3600lbs.

It is what it is. Believe it or not.
JL

Wow, that seems to be a really mild set up. Must be the driver mod too lol. But i figure it didn't have 9:1 lol. I was thinking with all that work and no FI that it had to have a little compression. But seriously that is one strong running car there.

I'm for sure going to build my auto up and put it back in the car when i put n2o or FI on my cobra motor thats going in the car. Man thats would be crazy.

On the flip, is there any benifits to the cast mark VIII crank over the forged or gt crank? I know that the mark crank is lighter annd spins up faster but is there anything else? Just pm so we don't clog his thread.

Johnny Langton · Nov 10, 2007

voidfinger said:
Wow, that seems to be a really mild set up. Must be the driver mod too lol. But i figure it didn't have 9:1 lol. I was thinking with all that work and no FI that it had to have a little compression. But seriously that is one strong running car there.

I'm for sure going to build my auto up and put it back in the car when i put n2o or FI on my cobra motor thats going in the car. Man thats would be crazy.

On the flip, is there any benifits to the cast mark VIII crank over the forged or gt crank? I know that the mark crank is lighter annd spins up faster but is there anything else? Just pm so we don't clog his thread.

There's really not much to driving this car-it's harder to cut a light than anything else.
The Mark VIII crank is a different casting than the regular GT 2V crank and is a bit stronger. Better than a cast GT crank, but not as good as a forged Cobra crank.
And I've really got no more compression than a PI swapped '96-'98. It may actually be a bit less since my heads have some combustion chamber work.
JL

voidfinger · Nov 10, 2007

thats cool, really though. what do you contribute a 12.1 to? the stall and gears?

Johnny Langton · Nov 10, 2007

voidfinger said:
thats cool, really though. what do you contribute a 12.1 to? the stall and gears?

You Mustang guys.....really make me laugh sometimes. :rollinglaugh:
It's not any one or two things-it's the total combination of parts and proper tuning. It's got more in it that the 12.16...just a matter of time to get to it.
JL

voidfinger · Nov 10, 2007

well i'm glad you can find humor in what i'm saying. I'm just trying to figure out why your car with similar mods to a mustang that is lighter will not touch that time? thats all i'm trying to figure... i know it has a lot to do with the tuning also.

Johnny Langton · Nov 11, 2007

voidfinger said:
well i'm glad you can find humor in what i'm saying. I'm just trying to figure out why your car with similar mods to a mustang that is lighter will not touch that time? thats all i'm trying to figure... i know it has a lot to do with the tuning also.

Tuning has alot to do with it,as well as the total package.Everything has to be setup and tweaked to get as much of the power to the wheels as is possible. I see Mustang owners constantly changing their combination of parts,or buying the parts that don't make the others perform best,and then wonder why the car is slow. They're looking for that magical "holy grail" of a part that'll make the car alot faster-it's just not that simple.
Example....
Typical Mustang owner...."I'm gonna get a big,lopey cam so the car will go fast"
2 weeks later-"Why is my car slower?"
Answer....he left the same stock gears and torque converter in the car,and did nothing to the suspension.....

I could go on for hours about this stuff,and it's not all just Mustang owners...I just like to pick on you guys :thumb:
JL