Got a question for the h/c/I guys.

SLOW95GTS · Sep 24, 2013

So I'm in the process of getting some Edelbrock aluminum heads, and I plan on using the stock cam and the 1.7 roller rockers. So I know I will have to upgrade to 24 lb. injectors and mass air sensor, but is a tune needed with all these parts? As long as I don't have a bigger cam I'll be fine on just adjusting the fuel press. And timing right?

I'm used to working on fox bodies and this is the first time I've put so many mods on sn95 so any help is appreciated, thanks.

also I know some people say if they just get a mail order tune I'll be fine, is that true? Kinda hard to believe.
i heard the one from sct or quarter horse are good ones.

wildman97 · Sep 24, 2013

You won't necessarily 'NEED" a tune. But it's best to get one for optimal gains.

5jvenom · Sep 24, 2013

def would get 24lbers but as log as you get the matching MAF..you can play with timing and fuel pressure to optimize it on a cimple setup

OnyxCobra · Sep 24, 2013

changing the fuel pressure won't affect anything on our cars. you won't need a tune but like mentioned you won't see nearly the gain, the car may actually feel slower. the right and best way to change injectors is with a tune. get ahold of [MENTION=8201]Addermk2[/MENTION], he can help with a tune if you decide to go that route.

SLOW95GTS · Sep 24, 2013

OnyxCobra said:
changing the fuel pressure won't affect anything on our cars. you won't need a tune but like mentioned you won't see nearly the gain, the car may actually feel slower. the right and best way to change injectors is with a tune. get ahold of Addermk2, he can help with a tune if you decide to go that route.

Hows that? then there is no purpose for a FPR?

im changing the injectors to 24lb., and i was thinking of getting a j4j1 computer thats local in my area for 60 bucks. i heard that is a sure way of having no tune issues, right?

OnyxCobra · Sep 24, 2013

SLOW95GTS said:
Hows that? then there is no purpose for a FPR?

im changing the injectors to 24lb., and i was thinking of getting a j4j1 computer thats local in my area for 60 bucks. i heard that is a sure way of having no tune issues, right?

well of course you need a FPR, but adjustable FPR don't do anything on our cars from everything I've read/heard.

if you could get a Cobra computer that would avoid having to get tuned for the 24lb injectors, but it's still not going to run optimally with the new heads. You're getting an intake too, right?

5jvenom · Sep 24, 2013

OnyxCobra said:
well of course you need a FPR, but adjustable FPR don't do anything on our cars from everything I've read/heard.

if you could get a Cobra computer that would avoid having to get tuned for the 24lb injectors, but it's still not going to run optimally with the new heads. You're getting an intake too, right?

no offense but from my EXPERIENCE..not from what i've heard/read..it's going to help ...since you have 24s now, you can adjust base fuel pressure and lean it out a little or richen as needed depending on his HCI...

adjusting FP and timing has always been a way to gain power/response from any 5.0

OnyxCobra · Sep 24, 2013

5jvenom said:
no offense but from my EXPERIENCE..not from what i've heard/read..it's going to help ...since you have 24s now, you can adjust base fuel pressure and lean it out a little or richen as needed depending on his HCI...

adjusting FP and timing has always been a way to gain power/response from any 5.0

You can try adjusting it but you're not going to notice any difference, 94/95 computers will adjust accordingly and the changes you make aren't going to do anything; maybe you have more experience with fox bodies? I don't have 24s now but back when my car was more stock adjusting the FPR did not change how lean or rich the car ran.

SLOW95GTS · Sep 24, 2013

OnyxCobra said:
well of course you need a FPR, but adjustable FPR don't do anything on our cars from everything I've read/heard.

if you could get a Cobra computer that would avoid having to get tuned for the 24lb injectors, but it's still not going to run optimally with the new heads. You're getting an intake too, right?

Yeah I'm running a cobra intake currently with 1.7 roller rockers and stock cam, I have a FPR on right now and I have it at 38-39 currently. It's running really well right now.

teal95gt · Sep 24, 2013

Also would like to add the 94-95 Cobra computers are pretty hard to tune and really finicky. I heard of people using the fox body computers sometimes. I could just be spewing out a pile of shit but I am fairly certain I'm not haha, I believe the 94-95 computers had adaptive learning and in order to tune on them you have to turn a few things off etc. last thing I'm going to say is I would get the sct chip or something similar mail order tune then take it to a shop that can dyno tune that type of chip to get all you can out of the mods IMHO, like the first response mentioned.

rz5.0 · Sep 24, 2013

Just get a tune. Depending on the eddys you get might consider changing the springs and stuff on them. .

SLOW95GTS · Sep 24, 2013

rz5.0 said:
Just get a tune. Depending on the eddys you get might consider changing the springs and stuff on them. .

"Just get a tune", is easier said than done my friend. The local shops doesn't charge 100 bucks for a job like this, and I'm taking a chance on someone f'ing up!

and when did this whole " everyone needs a dyno to run right", start?

ivan12 · Sep 24, 2013

SLOW95GTS said:
"Just get a tune", is easier said than done my friend. The local shops doesn't charge 100 bucks for a job like this, and I'm taking a chance on someone f'ing up!

and when did this whole " everyone needs a dyno to run right", start?

after a cam or head swap "most" owners will tell you that the car doesn't run right without a tune. That's just the way these computers are and why a lot of dyno tuners wont touch them or have problems tuning them. Mail order chips will get you close but without an actual dyno tune it's hard to get the car to run to it's maximum potential. And I agree with Onyx, an adjustable FPR doesn't help as much as it does on a fox body, I say this not because of what I heard/read but because I own both.

ttocs · Sep 24, 2013

The 94/95 have always been tempermental to changes made to the heads/cam. You can try your luck at a canned tune(I did) but most of us have found that they are no as good as they advertise and unless you have datalogging capability to monitor your car while doing runs to send to a tuner, a dyno is the best/only real way to be sure that things are done correctly. Ah sure they could screw it up as on the dyno sometimes they go, sometimes they blow but if your car runs as bad as mine did after a HCI swap and a BAMA tunes chip a dyno an hr away is by far the best alternative.

OnyxCobra · Sep 24, 2013

the cam is really what throws our comps for a loop, if you run the stock cam i'm confident you could get it running half way decent without a tune. Hopefully the GT cam will work well with the Cobra computer, the cams are really close so I'm guessing it'll work fine. I drove my head/cam setup for a year or two without a tune and most days it acted pretty good but lacked a fair amount of power.

rz5.0 · Sep 25, 2013

Guess We'll just wait for "my car is not running right" my car is slower than before" my car won't idle:

SLOW95GTS · Sep 25, 2013

rz5.0 said:
Guess We'll just wait for "my car is not running right" my car is shower than before" my car won't idle:

Well actually I got word from a mustang fanatic who's been in the game for years and all he does all day is mess with mustangs from foxes to sn's and ect. So you guys can continue with your 5.0 section, I'm not using it after this.

ScottyDsntKnow · Sep 25, 2013

Ok well have fun. I've also had experience with this and the car will not run even close to its best without a dyno tune. There is only one right way to run the car after you do major engine work and that is to get it tuned, there is no substitute. Not to mention the 94/95 computers are so badly tuned from the factory that it'll run better just from a good tuner adjusting the fuel tables if nothing else. My 95 Cobra made 260whp as a baseline after my HCI. After 3 dyno pulls my tuner had it to 301whp and 325ft lbs and I was using the Edelbrock heads too. I understand you have the stock cam as well but changing the heads is still a huge difference in what the computer will expect.

OnyxCobra · Sep 25, 2013

SLOW95GTS said:
Well actually I got word from a mustang fanatic who's been in the game for years and all he does all day is mess with mustangs from foxes to sn's and ect. So you guys can continue with your 5.0 section, I'm not using it after this.

why not, cause we go out of our way to give you answers that you don't like? I can't speak for everyone but I'd like to hear what this "fanatic" has to say about this topic, maybe we can learn something. that's what these forums are all about.

SLOW95GTS · Sep 25, 2013

This thread was for the people who've actually done something like this, the "fanatic's" been through every situation with these cars and foxes and ect. I'm sorry i'm not happy with some of your responses, its just not making sense to me how putting a set of physically more flowing heads on a car without changing any of the valvetrain, will trigger problems. I just can't imagine myself to pay almost 800 dollars, which I was quoted by a local dyno shop in my area including the chip. Also, if the RZ5.0 didn't make that comment, I wouldn't of lashed out with my comment above. Guy thinks everyone with a mustang must have bank like himself or something.