xnext

hey guys! im relly mad with my 89 5.0 mustang its has like a lot of performance **** in it and i only did 221 hp and 272 of tq and did a a 14.5 a 98mphon the 1/4 mile, i needHELP!!! what can i do to fix this???? my cars has bbk intake,shorty headers, crown vic injectors, 155lph fuel pump,polished and ported heads(the stocks one) a e303 FRPP cam shaft,and rollers,its bore to .30 and the compresion i got was 180 psi,a2.50 cat back with some trush pipes, electric fan,bbk under drive pulleys,msd coil blaster, and spark cables. I DONT HAVE a fuel regulator, it stils has the stock trothel body and the gears i think are 2.73, and the timing is set at 12 degres i think or 14 i dunno, but what can i do with all that stuff i was hopping for more hp and tq it has a 5 speed tranny by the way any advice is good!!!

Mustangkiler

Get a regulator

jthorn9

That's about right due to both your stock gears, and the bottle neck still occuring in the intake and heads.

Get some 3.55 or 3.73 gears, then get a better flow intake/head setup, such as a GT-40 (mild end), Trickflow/Eddelbrock (mid range), Trickflow/Eddelbrock and AFR heads (performer end). This will yield much better power, as well as performance.

The fuel pressure regulator will help, but only modestly.

irish1

Hmm a little more info might help, you posted your numbers but is that after a dyno tuning session? How large are the crown vic injectors? what intake do you have? Without question I would do maybe 3.73 gears and a fp regulator.

xnext

the run was after the dyno i havent touch anything not even the ignition the crown vic are the same as the stock gt haves only that it has 4 litel holes instead of 1 spray like the stock ones and its a bbk cold air intake but i have the stock flow,intake

mjr46

put some gears in it and run high 13's my 92 runs 13.80's to 13.90's with 3.45 gears and sticky tires

85GTsleeper

throw away your heads and stock gears then wa la speed.

98MustangGT46

Like every one said. Get a good set of heads and a intake manifold. Gears will help alot too.