19lb 5.0 injectors in a 2.9?

[ba89]

Hello everyone. I just rebuilt my 2.9 with a custom camshaft,ported intakes,bigger t-body and motor bored 30 over. I was wondering if 19lb injectors will work from a 5.0 Mustang? Has anyone done this? I know they both have the EV1 style connector but will they actually fit/work. Any info will be greatly appreciated. Thanks for your time

 

[hopster]

i think they will but you will still need to tune it to make it run its best.

 

[Psychopete]

bigger injectors only will benefit if the injectors you have aren't capable of keeping up with demand. yes, they will work, but you're probably going to run into some drive-ability problems and rich fuel mixture. try it I guess, I ran a similar engine with 19s on a MAF system but ended up going back to a flow matched set of 14lbs.

 

[disciplerocks]

A matched MAF will do the trick if your 2.9 is equipped with one.

Sounds like you spent a lot of money on that 2.9. Why not swap a 4.0 in its place. It would have been so much cheaper.

 

[straycat]

We have a tech section on this site. I looked this up for you since I read this some time back when I helped an old buddy redo his 2.9 into a rock crawler and he just wanted a better running 2.9, not a 5.0 swap. We did a cam swap, ported and polished the heads added headers and bigger injectors and we added better rocker arms and valves. Read this section below. It is pretty good.

http://www.therangerstation.com/tech_library/MAF_Conversion.html

 

[ba89]

We have a tech section on this site. I looked this up for you since I read this some time back when I helped an old buddy redo his 2.9 into a rock crawler and he just wanted a better running 2.9, not a 5.0 swap. We did a cam swap, ported and polished the heads added headers and bigger injectors and we added better rocker arms and valves. Read this section below. It is pretty good.

http://www.therangerstation.com/tech_library/MAF_Conversion.html

Thanks for the info everyone! Well... my truck is none MAF and after all the time and money I just put into it, I really don't want to do the conversion...yet. I WANT TO DRIVE IT!! Well... I guess I will throw them in there and see what she does and if they don't just get a flow matched set of stock ones. Thanks again for the info and your time

 

[ba89]

A matched MAF will do the trick if your 2.9 is equipped with one.

Sounds like you spent a lot of money on that 2.9. Why not swap a 4.0 in its place. It would have been so much cheaper.

Well... I have a friend who owns a machine shop. It really didn't cost all that much... just alot of my time. I wanted to do the 4.0 swap but I didn;t want to loose the column shift,and electronic 4WD. Oh and I could not find an ECU for an automatic....just manual. So I went this route. I really wanted to do the 5.0 swap but that was going to be even more of a pain in the ass.

 

[AllanD]

Gee, I woulda thought that the bigger camshaft and ported heads would lean a 2.9 out a little...

Which is EXACTLY what you'd want as in my experience 2.9's tend to run pig rich already.

I should also note that 1990-92 4.0's have more displacement per cylinder
than a 5.0 (40.83CID/Cyl for the 4.0 vs 37.75 for the 5.0), but use EXACTLY
the same injector as all 1986-92 2.9 engines.

I really don't think there's anything broken there that you need to be fixing,
except stroking your ego (or other body parts) with the idea that you run
bigger injectors.

Oh, BTW! your 2.9 already makes more power relative to displacement than a 5.0HO engine

140hp from 177 CID = 0.79hp/CI
225HP from 302 CID = 0.74hp/CI

So exactly how much room for gains do you really think there are?