95 GT Convertible fuel system

[Performance_nube]

What's up everyone!
Got a pretty straight forward question.
I have 95 GT 5.0 convertible 5 speed, I would to start with upgrading the fuel system, New high preasure stealth fuel pump, 29lb injectors, keeping the stock fuel rails for now. (fuel tank was full of crap)

So, the question, will I need to do a tune on it before it will run?
I'm going to pick up a Terminator X, but I want to start before it gets here and not lose use of the car.
Also, there have been mods done to the engine, cam, Edelbrock throttle body, cold air intake,2.5 in exhaust but there are no records of exactly what was done

 

[Noobz347]

I would leave the OEM 19 lb injectors installed at least until the Termi arrived.

You gain absolutely nothing with the larger injector and are very likely to run rich with the OEM ECU.

As for the fuel pump, swap away. The only downside really, is more fuel cycles back to the tank.

 

[AeroCoupe]

Just curious, what brand and type of injector are those? Usually do not see 29 lb/hr stock type injectors for a 86-95 car. Common sizes are 19 lb/hr (stock V8), 24 lb/hr, 30 lb/hr, 36 lb/hr, 42 lb/hr, etc. as these are EV1 type injectors.

 

[Performance_nube]

Just curious, what brand and type of injector are those? Usually do not see 29 lb/hr stock type injectors for a 86-95 car. Common sizes are 19 lb/hr (stock V8), 24 lb/hr, 30 lb/hr, 36 lb/hr, 42 lb/hr, etc. as these are EV1 type injectors.

My bad, I didn't proof read, they are 24lb Accel (150824)

 

[Performance_nube]

I would leave the OEM 19 lb injectors installed at least until the Termi arrived.

You gain absolutely nothing with the larger injector and are very likely to run rich with the OEM ECU.

As for the fuel pump, swap away. The only downside really, is more fuel cycles back to the tank.

Well, not what I was hoping for, but I waited this long, what's another week or two... Thank you for the quick reply!

 

[AeroCoupe]

If it was me I would go with a set of 30 lb/hr as they will give the motor room to grow.

You really do not have a time of mods so you could get by with a calibrated MAF (mass air meter) like a Pro-M. There are others but I’ve only had experience with Pro-M. Lots of HCI cars out there running without a tune. At that point one will help but I wouldn’t waste my money on a tune until a HCI swap.

Aeromotive makes good stuff but usually the Walbro pumps are cheaper and have a great reputation.

 

[Performance_nube]

So, here is issue,
The car was passed around to a few people, (years in between owners) I know the original owner, and had done H/C/I swap, but he paid a shop to do it, (it doesn't exist anymore) I don't think any of the other owners ever had it running, and the original owner can't tell if it's the same engine or not... other than some issues that I'm pretty sure all relate to fuel problems, it's a strong clean running engine and I'm very hesitant to tear into it for no other reason than to find out what's inside, I guess a compression check is in order...

 

[AeroCoupe]

Okay so it’s not your run of the mill stock 5.0 motor. You really should consider a minimum of 30 lb/hr injectors. I ran out of injector with a mild 302 and 24’s. The problem with them was they were barely enough but my tuner had them at 100% duty and let me know drivability would suffer. I moved up to 42’s knowing I would eventually go to a 331. Car made another 20 rwhp and off idle and drivability were vastly improved. Just my .02.

A compression test would be a great idea.

 

[Mustang5L5]

I agree with keeping the 19s on until you get the ECU and can tune. Just avoid sustained high RPM pulls but you can get the car running and driving and get the ECU installed and a baseline tune. Then swap the injectors and swap it in the tune and done.

 

[Performance_nube]

Thank you, that is very helpful! Eventually it will be a stroker, (if it's not already‍) its just not "right" it runs great, Idols like it should, no issues hot or cold starting, but it's not fast by any stretch, it will be, but "speed is a question of money, how fa$t do you want to go?"