car wont make the power or run the number, whats wrong?

still the ported stock isnt capable of as much power. i have always craved more HP everytime i did something to my car. the TFS kits are proven power and i think a solid 300RWHP is a good starting point, if i wanted more power. throw a stroker bottom end in, port the heads, add some nitrous or a blower etc. assuming i have the money.

i know whats holding me back, we concluded it was the intake manifold restricting the rest of the engine. on the dyno sheets it starts gaining torque good and peaks too early at around 3500 and then proceeds to fall down. just isnt getting the air.

now its a question if i want to stick with the current stuff and go ahead and upgrade.

i didntt really think his intake is choking me at first either. but i didnt think the camshaft advance would have such a great affect. and know people have great luck with thumper and tmoss stuff. so i got confused.

i still cant figure out why the car didnt trap more than it did before with the stock engine.

with a bone stock 140k longblock, CAI, pullies, 1.7 RRs, exhaust and gears with a DR i managed 14.1@99 with a 2.0 60' and 13.9@ 97 with a 1.9 60' were my best with the stock engine.

on me new combo. i added
thumper e7s
tmoss lower
port matched my own upper and opened to 70mm TB
B-cam which i advanced 4 degress
70 MM TB
73MM MAF
190lph with aj regulator ( doesnt affect power but i can tinker with stuff)

all on top of a fresh rebuilt shortblock and a smoother shifting trans i just got rebuilt

granted i was just on street tires this past weekend and managed the 14.2, but it didnt want to mph at all, with a good tire i bet i would have seen 13.7 or so. but i always thought the mph will decrease a tad bit when you hook better.

all in all i would have guessed i would gain at least some mph in the 1/4 mile even if i was on street tires. i didnt gain anything.

just a reminder my car made 225HP and 270 TQ on a mustang dyno.like i said before, nothing is mechanically wrong. AFR was dead on on the dyno, consistant 13:1 pretty much, checked compression and got b/w 140-145 on all 8 cyls.

and another thing, i have a friend with a 97 GT mustang, SOHC 4.6 with a K&N filter and hpipe and flows on the same dyno made 207 HP and 270 TQ

i figured everything i have done to my engine and having it being new, that it would make more than just 17-20 Hp more than a sohc 4.6 with over 100k miles and he managed to make the same TQ number

heres the dyno sheet of my best run. maybe u guys can see something....


i really dont feel like tearing it down and upgrading, the engine runs good. i would be very willing to go back in and mess with the came timing for sure. but i dont really have the funds to really upgrade stuff. i dont know if mine is running bad or what. maybe its fine and i am crazy, but it still gained no mph, maybe i just need a tire to hook good. because i was pretty much launching off idle. anything more would spin the tires hard.