1989 5.0 upgrades

!989 5.0 convert · Dec 11, 2011

i have a 89 5.0 i have this list of things that come with the car still in the boxes i was wanting to know a few things
cobra upper and lower intake
65mm tb with egr spacer
73mm maf
shortty headers
bbk h pipe with headers

my main question is will this TB work well with this app or would it be better to get a 70 mm TB
and what can i expect to gain as far as HP and throttle responce and pick up off the line The car is just a street toy no raceing or anything just want some pep thanks

reldla1996 · Dec 11, 2011

For that list (and quite a bit more actually), the 65mm TB is the best size. The bigger TB's work better with more displacement, or high RPM's. You'll pick up 20-30 HP with those modifications. Aftermarket heads is where the biggest difference is to be had, especially when combined with the modifications you're contemplating now.

jrichker · Dec 11, 2011

On a budget? do the junkyard upgrade...

Gears - 87-88 T-Bird Turbo Coupe rear axle - disc brakes and 3.55 or 3.73 gears in one package for $125-$300. Add another $100-$200 or so to complete the brake upgrade.

94-95 Mustang GT MAF - $40-$100. It is 70 MM instead of the stock 55 MM on regular stangs built prior to 94. It uses a slip on duct on the side that goes to the throttle body and a 4 bolt flange on the other. You need a flange adapter to fit the stock slip on air ducting that goes to the air box. Wiring plugs right in with no changes. *1 *2

95-97 Ford Explorer intake manifold & throttle body $150-$300. The intake manifold flows 220 CFM +, much better than stock. Throttle body is 65 MM, bigger than the 60 MM on stock stangs. I got a 96 with EGR passages that match the stock setup, so my smog gear works just like factory. You’ll need a 65 MM EGR spacer & new gaskets for $65-$90 so you have a place to mount the EGR & throttle linkage.

3G alternator from 94-95 Mustangs or other Ford. $20-$120. A must have to make the electrical system work like it should or if you have an electric fan. You’ll need a 4 gauge power wire and a 125-135 amp fuse to go with it about $15- $30.

Lincoln MK VIII electric fan -$40-$160. Free up some HP by not having to drive the stock fan. The 3G alternator upgrade is a must have prerequisite before you do the MK VIII fan. You won’t have enough electrical power if you don’t do the 3G upgrade.

Aluminum driveshaft: (courtesy of shawn13) It needs to be from a 92-93-94 Aerostar AWD. It measures 45 ½” center of the front U-joint to center of the rear U-joint. You will need the U-joint, part #PUJ353 from NAPA. The Canadian NAPA pat number is 1-0134BF. It should bolt right up after the U-joint swap.

Note: This driveshaft is not an exact duplicate of the Ford Racing part. It is 3” in diameter while the Ford Racing part is 3.5” in diameter. There is no guarantee that the balance will be any better than the stock part.

Use a piece of string and wrap it around the driveshaft. Make a mark on the string where the ends overlap. Measure the length of the string:
On the 3" AeroStar driveshaft the string will be 9.42" or about 9 7/16" long.
On the Ford Racing 3.5" driveshaft the string will be 10.99" or about 11" long

*1.) Metal flange adapter http://www.kustomz.com/components.html Buy the TR70 for $40. Or spend some time on eBay looking for one that may fit.

*2.) MAF & sensor interchange
The 94-95 Mustang 5.0 MAF & sensor is also found on:
1995-94 Mustang 3.8L F2VF-12B579-A2A,
1994-92 Crown Victoria 4.6L F2VF-12B579-A2A,
1995-94 Mustang, Mustang Cobra 5.0L F2VF-12B579-A2A,
1994-92 Town Car 4.6L F2VF-12B579-A2A,
1994-92 Grand Marquis 4.6L F2VF-12B579-A2A,
Evidently the –A1A, -A2A, AA, etc. on the end of the part number is a minor variant that did not change the operating specs. You should be able to ignore it and have everything work good.

nibik91 · Dec 11, 2011

gears would be a nice addition to what you have listed.

!989 5.0 convert · Dec 30, 2011

!989 5.0 convert said:
i have a 89 5.0 i have this list of things that come with the car still in the boxes i was wanting to know a few things
cobra upper and lower intake
65mm tb with egr spacer
73mm maf
shortty headers
bbk h pipe with headers

my main question is will this TB work well with this app or would it be better to get a 70 mm TB
and what can i expect to gain as far as HP and throttle responce and pick up off the line The car is just a street toy no raceing or anything just want some pep thanks

Also thinking of adding a cam to this. Not really wanting to add a lot of HP it is a convertible but mainly wanting that head turning sound anyone got any ideas

THANKS

!989 5.0 convert · Dec 30, 2011

I did forget to add i am adding either 3:73 or 4:10 gears

!989 5.0 convert · Jan 29, 2012

!989 5.0 convert said:
Also thinking of adding a cam to this. Not really wanting to add a lot of HP it is a convertible but mainly wanting that head turning sound anyone got any ideas

THANKS

i think im going with a b 303 cam added to the list has anyone used this with stock heads and what can i expect
thanks

f8tlfiveo · Jan 30, 2012

I wouldn't touch the cam till you get heads..waste of money IMHO..

No.11 · Jan 30, 2012

wtf wrong thread lol

!989 5.0 convert · Mar 7, 2012

i went with a trick flow stage 1 cam gt 40 heads and the cobra intake withthe 65mm tb do i need to upgrade my injectors or will the 19 lb and the stock fpr handle this ok

thanks

Blown88GT · Mar 7, 2012

19 lb/hr injectors are good for 304hp
Stock FPR does not limit HP & sets pressure at 39 psi.

!989 5.0 convert · Mar 12, 2012

thanks

Mary brown · Mar 12, 2012

I love this review I really love it

87-t-top-gt · Mar 13, 2012

If you're gonna go the cam route atleast toss a set of gt40 or gt40ps in there, if not better.

!989 5.0 convert · Mar 16, 2012

ok heres what i have
1989 5.0 aod auto
gt40 heads trick flow spring upgrade
trick flow stage one cam
cobra intake
65mm tb (tps voltage set )
no spacer its made to the upper intake
70mm maf

PROBLEM turns over a few times then lags then starts runs on just a little high on idle around 1500
but when i put it in gear it still runs ok but i have NO power and it sounds like im starting off in like 3rd gear you know that rattle sound anyone have any ideas

JonezySN95 · May 7, 2012

Did you ever figure out what the problem was? It sounds like a timing issue to me.

!989 5.0 convert · May 12, 2012

yes i did find the problem well the one that didnt find me the no power was a timing issue but the big problem that found me was that i didnt shim the rockers i just bolted them down the valves were always open just a little end result was the problems listed above plus bent push rods and broken rocker bolts but hey i just learning and now i know how you guys know all that you know thanks everyone

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