opie_803

i might have an opportunity to go EFI. a friend of mine has a 94 cobra that he is putting a 500+hp chevy crate motor in with a th350. so guess what is coming out, a 5.0 cobra motor with 10k on the rebuild and a t5 tranny. i will also be able to get the ecm, wiring, intake, exhaust ( well the H pipe part anyway ) and clutch pedal (cable operated).

the motor was rebuilt a little over a year ago bored .30 over and has had larger valves put in the heads when they were worked, the cam was discribed as 2 above the e303 cam, underdrive pullies, a fluid dampner, cold air intake and a dyno tuned ecu. the tranny has a 6 puck disc and billet flywheel that was installed at the rebuild.

i think that is about it off the top of my head.

my friend is building a ford truck for his father-in-law and will swap my 351c and aod for the above even to go in the truck.

what ya think?

one other thing, my car was accepted to show in the world of wheels next weekend. pretty happy about that.

JamesW

With that complete setup, it should be a fairly easy swap. Check out my website for ideas.

tx65coupe

That would be a cool swap, and shouldn't be very difficult. Personally, I think I would keep it with the 351 AOD setup. I think it suits the car better.

He is putting a bowtie motor in a Cobra? All I can say about that is thumbs down.

opie_803

thanks JamesW, there is a ton of useful information on your site. there are alot of little things that i would have over looked until i was trying to set it in the car. bad time to find out.

tx65, i am wanting the drivability of a modern car with the looks of a classic. also, my wife drives the car from time to time and unless the car is completely warmed up, it has a tendency to want to stall out when you come to a stop or let off the gas suddenly.

it is stuff i am familiar with and can drive accordingly. i would just hate for her it get in a situation that could get her or the car hurt.

plus the fuel milage wouldnt hurt either.

1971mach1

That seems like a alot of work and expense to cure a carborator problem. (My drivabillity
problems all went away with a new Edelbrock carb.)
Plus I doubt you'll see much power gain btw a 5.0 Cobra vs a 351C, probably even a loss if the 351c is setup right.
Also the T-5 is a marginal transmission, even the Cobra version is only good for 330ft/lbs torque. (that's why I went with a TKO-500 instead)
I'd say alot of work, with not much gain.

opie_803

71mach, i havent dynoed my motor yet but let me tell ya what has been done and you tell me if i have it set up right.

72 4 bolt block
70 4v quench heads decked .025 with 120 lbs valve springs
bord .40 over with dished pistons (flat tops would have been better)
edelbrock performer intake
edelbrock 600 carb electric choke
lunati cam street/strip part #31103 advertised duration 285/300 with 530 lift
stock exhaust manifolds (clearance issues with headers and driveway)
port plates on intake and exhaust
camshaft degree in +2
est. 9.6:1 compression ratio

guesses on hp/tq? will a t5 handle it?

tx65coupe

I would try running a different carb.

I think that EFI is cool, but its kind of a let down when you pop the hood on cruise night.

I have an Edelbrock carb and I don't have any weird issues. The only thing is that sometimes it doesn't start on the first try, but only takes a second try.

If your wife drives it the AOD is probably a better choice versus a 5 speed.

oldrock

I'd be like 65 coupe on this one. EFI is cool but these are classic mustangs and I personally like to have the old school carb motors in there. There is just something about a good running carb motor in a mustang that sounds right to me. I love cranking up my 390 and just listening to it at idle in my 69.

1971mach1

Nope, (unless you drive like grampa!)
A stock 351C is rated at 370ft/lbs torque. The T-5Z is only rated to 330ft/lbs.
I really think the Cobra 5.0 will be a step down in performance too.
My 71 now has a Edelbrock Performer 750 carb and it really woke up the top end HP (by "seat-of-pants" dyno). It also has the 4v heads and is setup similar to yours. IMHO you're leaving significant HP on the table with that small carb, not to mention, it has drivability issues. The stock Motorcraft carb was 735cfm on that engine, so a 750 with vacuum secondaries does well.

OCHOHILL

I don't know this for sure but I thought I read somewhere that the 94-5 have some kind of alarm system that makes it difficult to install in another car. I could be wrong though.
You might do some more research before you pull the trigger.