Which Distributor for 351w motor and efi

[z70what]

I'm converting my 1972 351W motor to EFI with the trick flow lower and upper intakes, 75mm throttle body, and 19lb injectors. I need to know where i can get a new ford 351w efi distributor? Or which year dizzy i need to order from the ford parts counter. i want to start with new, or like new parts for this efi conversion. i'm using a 1993 5.0L mustang EFI and harness for my setup .. Let me know. Thanks.


Luke

 

[fordtrucksrule]

it depends on your cam but try a 1994 bronco 351 w if youre flat tappet or 1996 if youre roller

 

[z70what]

i'm running the edelbrock performer plus flat tappet cam and lifters.

 

[fordtrucksrule]

any early 90' distributor will work good. Also do some reserch you may want to do larger injectors it seems like you want to push some power. why the 75mm throttle body?

 

[Ourobos]

94 Ford Lightning...If you're running a good head, you might want to step those injectors up, 19# is good to 300hp N/A roughly, and that's about it.

 

[408Bronco]

Are you running the TFI set up on the dizzy, MSD #8453 if you are.

 

[KyleQ]

MSD 8452 if you are going full roller ;D


Those injectors might be a little small - I'm building a 351W with TFS 185 heads and a XE274HR Xtreme Energy cam and I'll easily breach the 400HP mark...

 

[tk1218]

Would the MSD be a good choice with a full roller 351W and a carb?

 

[Bronchole]

Not that MSD, it has the TFI module for ingnition advance.

 

[KyleQ]

Not that MSD, it has the TFI module for ingnition advance.

i'm using a 1993 5.0L mustang EFI and harness for my setup ..
Luke

Ahh - he needs a TFI distributor with that setup...

 

[z70what]

i haven't ordered the trick flow upper and lower intakes yet.. they offer a 90 mm and a 75mm.. i thought about going with the 90 mm TF Intakes. If i do, what size throttle body and injectors do i need to run?

On another note, my father has offered to trade his fully rebuilt (less than 2,000 miles) 1993 Cobra 5.0L motor and all EFI components for my rebuilt '72 351W and 69' mach 1 heads with flat tappet roller and carb plus $2,000. it's a toss up, don't know if i should take it and stick it in the bronco, or continue on my 351w EFI build.. any thoughts on both?

Luke

 

[KyleQ]

Don't waste you time on the trick flow intakes - they loose low end for top end when compared to a GT-40 intake. You have to be careful just throwing money at a motor, those are 1/4 mile parts...

FYI - MM&FF Intake Shootout

Peak Horsepower -- GT-40 450 hp @ 6600 rpm
Peak Horsepower -- TFS R 475 hp @ 6500 rpm
Peak Torque -- GT-40 447 lbs.-ft. @ 4700 rpm
Peak Torque -- TFS R 422 lbs.-ft. @ 5100 rpm

Those numbers are on a 347 with AFR 185's with a big ass cam. They are running 36lb/hr injectors with a 70 mm Accufab MAF - 77mm ProM.

With these aftermarket intakes are are basically trading low end torque for high end horsepower.

This is a tubular GT-40, it should squeeze a little more power then the intake they ran in their test...


Those 19lb injectors are only going to be good/safe for ~260hp - pretty lame for a 351W. It seems you need to do quite a bit of research before you start buying parts.

 

[mattt]

Since you're using a Mustang harness and have a flat tappet cam/lifters your best option for a distributor would be a late 80's thru '91 van, bronco, or truck. That distributor will have a cast gear(correct for non roller), and the TFI module mounted on the distributor body(same mount as a Mustang). Any distributor ~'92 or later will have a remote mounted TFI module.

 

[airbur]

...This is a tubular GT-40, it should squeeze a little more power then the intake they ran in their test...

Are you sure? From the article, they not only used a tubular GT-40, but also an "Extrude Hone ported GT-40 lower intake". Porting is $$$ unless you do it yourself.

One issue with that setup is that the tubular GT-40s are $$$ ($400+) if you are able to find one.....and on top of that, the 351w GT-40 lowers are few are far between on top of even more $ ($350+).

Numbers on 351W will also be quite different especially at the low RPMs we normally run in these Broncos.

 

[KyleQ]

All I'm saying is that those aftermarket, even higher $$$ intakes, only push low end torque down and high rpm hp up - totally the opposite of what you want in a Bronco.

I guess I got lucky finding my intakes - a truck lower and car upper will be fine on E7 heads, even GT-40 heads...

 

[Broncobowsher]

All I'm saying is that those aftermarket, even higher $$$ intakes, only push low end torque down and high rpm hp up - totally the opposite of what you want in a Bronco.

I guess I got lucky finding my intakes - a truck lower and car upper will be fine on E7 heads, even GT-40 heads...

As long as you never ask for power over 4k...

As for throttle body size, larger will make more power up to the point that it is no longer the restriction. Bigger will also quicken throttle response. Keep in mind that technical driving isn't about having the power on or off, but actually controlling the power delivery. Aiming for that fine line between not enough and too much. A smaller throttle body will allow more controlled throttling especially at lower speeds.

For the car upper, truck lower combo I would call the stock car upper 60 just fine. 65mm would be a nice touch but beyond that the upper intake is too much of a choke point.
With better manifolds like the trickflows mentioned, 65-70mm will feed a 351 nicely and still offer throttle control. That would be a much better choice with any aftermarket head. That will also require bigger then 19Lb injectors (unless you want to cripple it like they did with the Lightening and keep the redline under 5k).

 

[cafyrman]

I saw a comparison of stock intake heights on CB somewhere, but what about aftermarket? What's the height of the Trick Flow or Edelbrock? Would they be shorter than the 5.8 lower>BC adapter>5.0 upper?

And how does this relate to 351 distributors? %)

 

[KyleQ]

I saw a comparison of stock intake heights on CB somewhere, but what about aftermarket? What's the height of the Trick Flow or Edelbrock? Would they be shorter than the 5.8 lower>BC adapter>5.0 upper?

And how does this relate to 351 distributors? %)

A quick search found this thread - 351w EFI intake height

http://classicbroncos.com/forums/showthread.php?t=190777&highlight=intake+height

As for relating to distributer, it doesn't - but there sure is some great tech that came out of it.

 

[cafyrman]

A quick search found this thread - 351w EFI intake height

http://classicbroncos.com/forums/showthread.php?t=190777&highlight=intake+height

As for relating to distributer, it doesn't - but there sure is some great tech that came out of it.

And where in the linked thread does it talk about Edelbrock or Trick Flow manifold height? %)

The less snarky reply is; thanks for the info, but I've seen that thread and it doesn't answer my question.

 

[EricLar80]

And where in the linked thread does it talk about Edelbrock or Trick Flow manifold height? %)

The less snarky reply is; thanks for the info, but I've seen that thread and it doesn't answer my question.

Maybe this will help:
Intake heights

Enjoy!