[91foxhatch5.0]

I have a 91 lx 5.0 automatic with around 140k. My current setup is a bbk non fenderwell intake, u/d pulleys, electric fan, no smog, o/r h pipe. I have no way to dyno this car and i was wondering what kind of numbers im puttin down

[JBIGBOOTSY]

I would guess 200-210rwhp, and 270-290rwtq?

[G.T. Rags]

200rwhp max...91's only had 215 crank hp.
with 140k and the auto he's looking at 170-180 rwhp
the intake doesn't do that much at this stage of the moddding, maybe adds 2-3, the pipe is good for around 7-9 and then the fan and whatnot is good for a few more.

[TENGRAM]

with the hood up while on this imaginary dyno, about 200 rwhp. with the hood closed, much less and probably a shitty idle. you need to get/make a heat shield of some sorts for that air filter. my2cents

[Tony_90fox]

My 90 aod with u/d pullies, long tubes, o/r H pipe, flows, and everything else stock pulled 200 RWHP and 291 RWTQ.

[G.T. Rags]

Originally Posted by Tony_90fox My 90 aod with u/d pullies, long tubes, o/r H pipe, flows, and everything else stock pulled 200 RWHP and 291 RWTQ.

u had an extra 10 hp from the factory...

[Tony_90fox]

Never said i did or didnt...I was just stating something to give him some comparison.

[G.T. Rags]

i know, but not everyone knows they down tuned the 5.0 from 91-95.

[JBIGBOOTSY]

what exactly did theychange in 91? I allways thought that 93 was the changes, just curious.

[G.T. Rags]

i'm not sure what they changed exactly, i just know they made it less powerfull to make weigh for the heavier sn95 and eventually the npi 4.6

[88dragstang]

I agree on the low hp add from the mods you have. Its all about the internals baby!!! Unless you put a turbo on it of course. Get a cam, heads and intake and let her rip!!!! I wouldnt sweat the bottom end except for new rod and main bearings. Ive seen the stock bottom ends hold 350hp+ for years (providing you dont drive everywhere on the rev limiter). As always, the biggest bang for the buck is GEARS!!!!!!!!!!! Good luck man.

[Tony_90fox]

Originally Posted by JBIGBOOTSY what exactly did theychange in 91? I allways thought that 93 was the changes, just curious.

As did i, but i didnt want to say something and be wrong. 93 was when they went to hyper, and i believe the HP went down...but i believe that it only went down in 93.

But i could be wrong. I have been before.

[superman5.0]

i have read many times that the internals from 91-93 other then not being forged in 93, but the horsepower decrease was due to a different cam put in, in 91, however ford never accurately rated them until 93. in otherwords a 91 and a 93 should dyno the same despite the ratings ford gave.

[5.0pwr]

Someone told me that the H.O High Output motors had more crap on them for environmental regulations, so they have less power?

[91foxhatch5.0]

damn aod

[91foxhatch5.0]

what kinda #'s should i expect in the 1/8th?

[88dragstang]

If you have stock gears, I say 9.50's

[91foxhatch5.0]

its a 7.5 with 3.45 gears

[TENGRAM]

Originally Posted by superman5.0 i have read many times that the internals from 91-93 other then not being forged in 93, but the horsepower decrease was due to a different cam put in, in 91, however ford never accurately rated them until 93. in otherwords a 91 and a 93 should dyno the same despite the ratings ford gave.

the cam was very slightly changed in late 88. in 91 they changed the way they rated the motor, hence the differences in HP between those years. all 89-93 motors would dyno the same today (obviously with slight differences due to production tolerences). 87-88 would also be nearly the same except for a small advantage because they were speed density and did not have a MAF restricting the inlet.

Originally Posted by 5.0pwr Someone told me that the H.O High Output motors had more crap on them for environmental regulations, so they have less power?

uh, no. all mustang 5.0s were HOs from 82-95.

[superman5.0]

so not 91-93 but 89-93 i thought i might of had the years a little off