New bronco owner questions

[steelworker77]

Picking up our new to us 71 Bronco next week. 2 of the things I would like to do first are replacing the Holley 4 bbl with efi (either sniper 2 or fitech) and swapping the 3 speed manual for the ax15. For those that have made these changes which one will I appreciate more? Trying to do things 1 at a time. Thanks and very excited.

 

[bronco italiano]

May be happier with a custom built quadrajet or Ford SEFI.
AX15 is great, make sure it matches your axle ratios/tire size.

 

[1969]

Skip the sniper so many people have problems. I’d recommend Pro Flo 4 for aftermarket efi.

 

[steelworker77]

What axle ratios do you recommend on 33's? I will need to check into the pro flo 4.

 

[Schloer2]

Congrats and welcome! I just picked up a ‘71 outfitted with Pro Flo 4 and a nv3550. Loving the setup so far and would absolutely recommend. Modern trans will probably have a bigger impact on the driving experience while efi is more of a nice to have unless you are planning to get off axis a lot


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[Ol Mule]

I've had nothing but good luck with my Sniper for over three years and over 10k miles, so not everyone has had bad experiences with it...

 

[steelworker77]

Will any year ax15 work? I can get a good deal locally on rebuilt ones vs buying a new one.

 

[bronco italiano]

Will any year ax15 work? I can get a good deal locally on rebuilt ones vs buying a new one.

https://www.wildhorses4x4.com/product/17808/Early_Bronco_Transmission

WH kit takes the headache out of the equation. Probably need to keep your SBF bellhousing.
Rebuilt is as good as the rebuilder/parts used

 

[Gupster88]

What axle ratios do you recommend on 33's? I will need to check into the pro flo 4.

33s. With an AX15 . Go with 4:11s. Any bigger tires I would go 4:56s

 

[jamesroney]

Will any year ax15 work? I can get a good deal locally on rebuilt ones vs buying a new one.

No, there's a bunch of different ones.

The one from the 98-00 Jeep Wrangler is the one that has become that people like. Watch out for the earlier 91-96 YJ because they use the GM style input shaft. The one from the Cherokee 4x4 is similar, but not exact. But if you spec a 99 TJ with the 4.0 that should be a winner.

 

[Johnnyb]

I ditched Ford EFI because it stopped being possible to re-program the computers to eliminate things we don't normally have on our broncos like vacuum emissions and possibly EGR.
I've also known too many people who have simply abandoned Sniper and fitech systems for various reasons.
Then I watched Nashville Early Bronco comparison of Fitech and Edelbrock Proflo 4 and probably ordered the Proflo for before the video was over:

First EFI system that I've ever installed (I've installed three total on this EB) that actually started on the first try and ran well on the first try.
It has continued to run well, deliver tons of power and requires very little meddling.

My two bits
JB

 

[SteveL]

May be happier with a custom built quadrajet or Ford SEFI.
AX15 is great, make sure it matches your axle ratios/tire size.

X2 on these options for fuel. .More so the q-jet.

 

[Midnight]

Skip the sniper so many people have problems. I’d recommend Pro Flo 4 for aftermarket efi.

I am thinking of switching my 73' 302 over to EFI, was looking at the Sniper. I just started doing some research on them. So when I saw this post it gave me pause, What king of problems are people having?

 

[Yeller]

I am thinking of switching my 73' 302 over to EFI, was looking at the Sniper. I just started doing some research on them. So when I saw this post it gave me pause, What king of problems are people having?

Most is centered around RF interference due to the location of the ford distributor and/or heat failure related internal electronics.

 

[Johnnyb]

https://classicbroncos.com/forums/threads/holley-efi-problems.319481/ among others. Sniper is a fancy electronic carburetor (throttle-body injection) with the ECM inside the throttle body where it is subject to heat, vibration and electronic interference from the distributor and plug wires.

 

[sprdv1]

Congrats on the score and post up pics

Become contributor, or other ways here:
https://classicbroncos.com/forums/threads/how-to-upload-photos-become-a-contributor.34373/

 

[BOBS 2 68S]

Get a AX 15 kit. Bolts right in. Mine came from WH

 

[m_m70]

What axle ratios do you recommend on 33's?

4:56 or 4:88 with a somewhat stock 302. I have 4:11 with 33's with the stock 3 speed manual and runs around 2800rpm's @ 65/70. I don't need to go much faster than that in a 54 year old truck with a short wheel base and lifted. My motor likes that RPM so when I decide to with an OD I'll be going with the 4:88's and the 33's.

 

[FordFarmer]

Another thought…As long as it runs well just drive it like it is for a while. You may find that the current setup suits your needs. If you do decide to proceed with changes, it’ll be based on experience with your rig, not what you thought you wanted/needed. Im running a stock three on the tree, autolite 2100 carb’d ‘71. I had big plans for a five speed, fuel injection, air conditioning etc. 10 years later the only change I followed through with was the air conditioning. Whatever you decide, good luck. Lots of experience and great advice here on CB.

 

[dmoses42]

I ditched Ford EFI because it stopped being possible to re-program the computers to eliminate things we don't normally have on our broncos like vacuum emissions and possibly EGR.
I've also known too many people who have simply abandoned Sniper and fitech systems for various reasons.
Then I watched Nashville Early Bronco comparison of Fitech and Edelbrock Proflo 4 and probably ordered the Proflo for before the video was over:

First EFI system that I've ever installed (I've installed three total on this EB) that actually started on the first try and ran well on the first try.
It has continued to run well, deliver tons of power and requires very little meddling.

My two bits
JB

I see you have a 2 inch body lift, would that Proflo 4 fit under a stock hood with 2" body lift? It looks kinda tall with that air gap intake.