what i have to do to upgrade from 19lb to 24 injectors

[XBAJBUSX]

i'm getting a bigger throtle body and i want to upgrade my injectors how does it go what do i have to change it i got 1988 gt ,

[Fat0eknee]

what other mods do you have ..if its just a tbody upgrade you dont need 24 lb injectors and on another note i wouldnt go bigger than a 65mm if your motor is close to stock

[Coupe50h]

very true, also i might add, you have to buy another mass air sensor/housing for calibration, but like stated above you wont need them yet, wait until you at least get an intake, full exhaust, and maybe even better heads, maybe port your stockers.
other than that, the injector swap is very simple.

[Coupe50h]

very true, also i might add, you have to buy another mass air sensor/housing for calibration, but like stated above you wont need them yet, wait until you at least get an intake, full exhaust, and maybe even better heads, maybe port your stockers.
other than that, the injector swap is very simple. edit: just realized your car is probaly speed density, so you dont need the mas

[Ackbar00]

Well, I made 300 RWHP on the stock 19# injectors. So unless you make that, you are wasting you money.

[LX5liter]

If its a Speed Density (1988) car then I think you will need a chip for the computer to use the bigger injectors, or convert over to Mass Air and get a properly calibrated MAF.

[Hethj7]

Originally Posted by Ackbar00

Well, I made 300 RWHP on the stock 19# injectors. So unless you make that, you are wasting you money.

Exactly. People are way to quick to upgrade injectors. I made 267 hp at the wheels with intake, heads, cam, exhaust, etc and was still running the stock injectors.

[PeTr0]

I agree that you can get pretty far with the stock injectors....BUT if you end up replacing them prematurly because they are clogged or you are just getting ready for more power in the future, you will need a new mass air calibrated for the right injectors and probably an adjustable fuel pressure regulator to dial down the pressure if u dont really need any more fuel. This can be another big mess though as spray patterns and all this comes into account. If u can just hold off and get the injectors later, invest elsewhere...you will be better off. what mods do u have now?

[XBAJBUSX]

I have flowmasters ,off road h-pipe ,intake ,and my car went to storage 4 winter so after i get it back i'm gone get gears 3.55 and the fallowing year i getting an engine from summitracing http://store.summitracing.com/defaul...ngine&x=21&y=8
what are think about this engine ,and the fallowing year paint job and i be don't so in 3 years my stang should be perfect ,

[XBAJBUSX]

this is the engine that i want to get what do you think and is it a good deal

Vendor Ford Racing Performance Parts
Product Line Ford Racing Performance 302 cid 345 HP Engine Assembly

These crate engines are ideal for kit cars, street rods, Mustangs, Fox-bodies cars, and trucks. These Ford Racing Performance Parts 5.0L/ 302 have approximately 9.0:1 compression and 345 hp. Ford Racing aluminum GT-40 cylinder heads and GT-40 valve train are installed. Ford Racing high performance hydraulic roller camshaft. roller lifters and standard rocker arms get you rolling. New long block assemblies, built at Ford's Cleveland engine plant. It goes down the same production line as the 5.0L HO engines, and built with the same quality controls as new production engines. With minor modifications, it will also fit earlier models and vehicles with automatic transmissions. These engine assemblies include the block, crank, rods, pistons, timing chains, standard rocker arms, roller tappets, push rods, oil pumps and pickups, oil pans, valve covers, front cover, water pumps, dampers, flywheels, spark plugs and related long block engine parts to which Ford Racing engineers have added GT-40 aluminum cylinder heads that flow significantly better than production 5.0L HO heads. The GT-40 valve train kit includes springs, retainers, keepers, seals and premium stainless steel swirl polished valves with undercut stems. Valve diameters are 1.94 in. for the intake and 1.54 in. for the exhaust valves. Ford Racing high performance hydraulic roller camshafts provide significant horsepower increases above 4000 rpm yet maintains good low-end torque. Valve lift is .480 in. on both intake and exhaust. Duration is 224 degrees at .050 in. on both the intake and exhaust sides.

Vendor Ford Racing Performance Parts
Product Line Ford Racing Performance 302 cid 345 HP Engine Assembly

[Ackbar00]

Originally Posted by XBAJBUSX

this is the engine that i want to get what do you think and is it a good deal

Vendor Ford Racing Performance Parts
Product Line Ford Racing Performance 302 cid 345 HP Engine Assembly

These crate engines are ideal for kit cars, street rods, Mustangs, Fox-bodies cars, and trucks. These Ford Racing Performance Parts 5.0L/ 302 have approximately 9.0:1 compression and 345 hp. Ford Racing aluminum GT-40 cylinder heads and GT-40 valve train are installed. Ford Racing high performance hydraulic roller camshaft. roller lifters and standard rocker arms get you rolling. New long block assemblies, built at Ford's Cleveland engine plant. It goes down the same production line as the 5.0L HO engines, and built with the same quality controls as new production engines. With minor modifications, it will also fit earlier models and vehicles with automatic transmissions. These engine assemblies include the block, crank, rods, pistons, timing chains, standard rocker arms, roller tappets, push rods, oil pumps and pickups, oil pans, valve covers, front cover, water pumps, dampers, flywheels, spark plugs and related long block engine parts to which Ford Racing engineers have added GT-40 aluminum cylinder heads that flow significantly better than production 5.0L HO heads. The GT-40 valve train kit includes springs, retainers, keepers, seals and premium stainless steel swirl polished valves with undercut stems. Valve diameters are 1.94 in. for the intake and 1.54 in. for the exhaust valves. Ford Racing high performance hydraulic roller camshafts provide significant horsepower increases above 4000 rpm yet maintains good low-end torque. Valve lift is .480 in. on both intake and exhaust. Duration is 224 degrees at .050 in. on both the intake and exhaust sides.

Vendor Ford Racing Performance Parts
Product Line Ford Racing Performance 302 cid 345 HP Engine Assembly

Is nice, but I would go with a engine from Fox Lake. They did mine, and I could be happier.

http://www.foxlakeracing.com/

[Unit 5302]

I really have to wonder about a B303 GT-40 aluminum head with 9.0:1 setup making 345hp. I'm sorry, but I see the combo in the 300-320hp range unless it's carbed, and extremely well tuned. Maybe they're rating in 99 Cobra hp?

19lb injectors are enough for that combo.

MAF is not necessary to run 24lb injectors. Period. An adjustable FPR is a "should" and may be required for smooth idle. Also, stepping up to 24lb/hr injectors is not warranted unless you plan on going to forced induction or a race motor. There are very few N/A 5.0's out there making the kind of power that would make an injector upgrade necessary.

[Hethj7]

Unit - Usually when Ford makes their HP claim on those motors, somewhere it is stated those numbers are for a motor with basically every other option bolted up to it (new exhaust, intake, TB, etc.). Just for comparision, I had that crate motor except with the GT-40 iron heads and I believe it was 8.5:1 compression. With all my bolt-on's I made the numbers in my sig., which would put it just over 300 hp at the crank. I don't know what the bump in compression and the aluminum heads are worth, but I just thought I'd throw out my numbers for comparison.