\'99 Explorer 5.0 engine (GT40P) question(s) for \'65 mustang - Ford Muscle Forums : Ford Muscle Cars Tech Forum
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Old 06-28-2004, 11:38 AM   #1 (permalink)
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\'99 Explorer 5.0 engine (GT40P) question(s) for \'65 mustang

I'm an old school guy (289 in 65 mustang), and I'm just looking into the new 5.0 engine (roller cam) stuff recently. Can anyone give me a little feedback about a '99 Explorer 5.0, and tell me if it's my answer.
Are these all roller cam motors, and will they accept a larger cam with the stock roller lifters?
Would these GT40P heads be any better than my 351W heads (64CC) or am I about the same? I'd really like to replace my old school engine with the new roller technology, and I can get a good price on this '99, so I'm curious if this is my answer. Are there any known issues with this motor (typically) I just plan on swapping my carb and intake (and pan) over and I'll upgade to a .480 - .500 lift cam. Will this work with this type of 5.0 or do I need a GT 5.0 to make the larger cams work. 3000-6000 RPM?
Thanks for any and all advice.
Joe

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Old 07-19-2004, 09:40 AM   #2 (permalink)
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\'99 Explorer 5.0 engine (GT40P) question(s) for \'65 mustang

I can't answer all of your questions, but according to all the flow data I've seen the P heads outflow the 351W heads pretty significantly. In fact it takes a decent port job to get the 351W to out-flow the P heads.
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Old 07-19-2004, 10:26 AM   #3 (permalink)
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\'99 Explorer 5.0 engine (GT40P) question(s) for \'65 mustang

Pretty much everything is a yes Those heads are pretty much the best flowing iron sb fords heads you can snatch, it is a full roller motor with plenty of p/v clearance and is a solid foundation to build upon; however there are few drawbacks. All the 5.0's up until 93' got forged pistons and any later model receive hypereutectic slugs. On those heads the spark plugs were offset at an odd angle, requiring either custom, or specific headers to fit and/or exhaust manifolds (these have no issues). In regards to the cam swap question I really wouldn't bother unless you really crave a lopey small block. With a stock short-block cam, AFR 165 heads, a weiand stealth intake,1.7:1 roller rockers, and a speed demon jr. 575 carb on my 86 5.0 I made 405hp at the crank

~have fun
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Old 07-21-2004, 10:40 AM   #4 (permalink)
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\'99 Explorer 5.0 engine (GT40P) question(s) for \'65 mustang

If you want a cheap cam . go with a ford racing e or b303.if you want custom cam. call cam research for a good cam, www.camresearchcorp.com
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Old 07-21-2004, 03:42 PM   #5 (permalink)
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\'99 Explorer 5.0 engine (GT40P) question(s) for \'65 mustang

That engine will work great for you. I have a 5.0 from a 92 Mustang in my 65 Mustang. I have iron GT40 heads, not the "P" heads. After spending a lot of time trying out different cam comobs on my desktop dyno 2000 software, I went with the Trick Flow stage 1 cam. This cam is a great match for the GT40 and GT40P heads and the price is good to. It cost around $140 from summit racing. On stock iron GT40 heads, desktop dyno had mine engine at 334 hp with the trick flow stage 1 cam and around 340 with the Ford B303 or E303 cam. So the "B" or "E" cam will give you a little more horse power, but the big difference is in the low end torque. At 2000 RPMs the Trick Flow stage 1 cam had 20 more foot pounds of torque compared to the Ford cams. So this cam makes good low end torque and high in horse power. I've read in the www.corral.net forum of people running stock GT40P heads and making anywhere from 250 up to 292 HP at the wheels. So this will be a pretty strong engine. I love mine and it just screams!

There are a few things you'll have to do in order to use the 5.0 in your early Mustang.
1. The 5.0 engine has a 50oz balance so you'll need to get a flywheel that has that balance.
2. You need to use your 289 oil pan, pick-up tube and timing chain cover.
3. You need to plug the oil dipstick hole that is on the driver side of the engine.
4. You will need to get a steel distributor gear and have a machine shop place it on your distributor. This is needed since the roller cams are steel. If you don't do this, you will mess up the cam.

I think that is it, but I may have left something out. You'll like how strong this engine is. I'm in the process of converting mine to fuel injection. I can't wait to see how much stronger it will be then.
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Old 08-14-2004, 03:51 PM   #6 (permalink)
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\'99 Explorer 5.0 engine (GT40P) question(s) for \'65 mustang

ALLTIRE: I have the same Explorer motor in a 67 Mustang Coupe. I tried the E303 cam but could only get about 0.060" piston-valve clearance on exhaust valve with the 1.7 rocker arms I just had to have. So I left the stock Explorer cam in for now. Just got it running and no mufflers yet so I don't know how it's going to pull. It sure does idle nice and smooth, though, and great vacuum. The hi-po cast iron manifolds on mine clear spark plugs/boots nicely. I also used old style oil pan and front cover; works OK, but had to make my own timing pointer and use degree tape for timing on the new style harmonic balancer. Good luck with yours.
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Old 08-15-2004, 09:44 AM   #7 (permalink)
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\'99 Explorer 5.0 engine (GT40P) question(s) for \'65 mustang

You can use the earlier style 28 oz balancer, you just have to use the earlier 28 oz flywheel.

You can swap over everything from your 289, timing cover, waterpump, brackets, pullies, timing pointer, balancer, flywheel, oil pan and pickup.

The Explorers have big ugly assessory brackets, distibutorless ignition balancer, and sepentine belts.

Don't forget about the distibutor gear thing.

Greg
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Old 08-18-2004, 07:12 PM   #8 (permalink)
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\'99 Explorer 5.0 engine (GT40P) question(s) for \'65 mustang

Quote:
On 2004-08-15 09:44, Greg R wrote:
You can use the earlier style 28 oz balancer, you just have to use the earlier 28 oz flywheel.

Greg
is this right? would sure save me a few bucks if it is.
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Old 08-19-2004, 11:15 PM   #9 (permalink)
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\'99 Explorer 5.0 engine (GT40P) question(s) for \'65 mustang

I went back and checked, and I messed up (damn memory ain't what it used to be ). To switch to the 28 oz setup you'd also need the matching crankshaft. Sorry for the misinformation.

I do believe you can use the 5.0 Mustang balancer. It's smaller and not near as ugly as the Explorer unit. You can also get v-belt pullies for it.

Greg
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Old 08-20-2004, 02:09 PM   #10 (permalink)
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\'99 Explorer 5.0 engine (GT40P) question(s) for \'65 mustang

I HAVE EXPLORER SHORT BLOCK ROLLER MOTOR IN MY 1966 MUSTANG. STOCK EXPLORER CAM, 9.25 TO 1 COMPRESSION, RPM PERFORMER INTAKE W/ 600 EDLE. CARB. BIG BELL HOUSING C-4 AND 2.80 GEARS.

BOUGHT A 85 MUSTANG STICK DIZZY FROM AUTOZONE AND WIRED IT WITH A CHEVY 4 PIN HEI MODULE FOR TOTAL COST OF DIZZY AND MODULE OF $48.00 THIS LOW BUCK ELECTRONIC DIZZY WORKS WELL, BUT YOU NEED A GOOD HOT COIL TO FIRE IT AT IDLE. I HAVE MSD BLASTER 2.

YOU WILL ALSO NEED V BELT DAMPER, LOOK IN FORD MOTORO SPORTS CATALOGUE. SHOULD COST $80.00 AND IF YOU HAVE SMALL 157 TOOTH FLYWHEEL, GO TO NATIONAL PARTS DEPO FOR 50OZ. 157 TOOTH C-4 FLEX PLATE. (COST IS $180) MY C-4 WAS OUT OF A 1978 TRUCK AND HAD 164 TOOTH FLEXPLATE, A 50OZ PLATE FOR 351 AOD WORKED GREAT FOR $39.

MY 66 MUSTANG GETS 23 MPG ON HIGHWAY RUNNING 60-65 MPH. MY 351 HEADS WERE PORTED PER FORD MUSCLE ARTICLE AT HOME, WITH 1.94 - 1.60 S STEEL VALVES. THESE HEADS WERE 1969 TAKE OFFS AND WITH BIGGER VALVES SHOULD BE SOME WHAT BETTER THAT GT40P HEADS. I KNEW STOCK HIPO IRON HEADERS WOULD FIT GT40P, BUT I WILL LATER UPGRADE TO SHELBY STYLE TRI-Y HEADERS AND 2 1/4 EXHAUST.

MY CURRENT EXHAUST IS STOCK 1966 MUSTANG IRON HEADERS AND 2 INCH DUAL EXHAUST THAT WERE ON THE CAR WHEN I BOUGHT IT.

I HAVE THE EXACT SPECS OF THE CAM AT HOME. THE CAM WAS DEGREED BY MACHINE SHOP AFTER BALANCING JOB. MAIL ME IF YOU NEED SPECS- I HAD TO CALL FORD AND IT WAS A REAL HASSLE TO GET THEM TO LOOK THE SPECS UP. I AM A CONTROLLER AT A FORD DEALERSHIP.

THE ENGINE WAS BALANCED AND CRANK LIGHTNED SOME WHAT TO HELP REV AND FOR MPG. THIS CAM IS LITTLE SMALLER THAT STOCK MUSTANG GT CAM BUT NOT MUCH. DUE TO MY INTENDED USE, I DID NOT THINK CHANGING TO MUSTANG STOCK CAM WAS WORTH THE COST.

SINCE I HAVE TALL GEARS AND NON-OVERDRIVE TRANNY, I DID NOT WANT TO RUN THE "E" OR 'B" CAM . I BUILT THE CAR FOR CRUSIER AND GOOD ROAD MANNERS. IT HAS REALLY STRONG MID RANGE CONSIDERING THE 2.80 GEARS.

I REALLY LIKE THE MOTOR. RUNS MUCH BETTER THAN 2-V 289 AND BETTER GAS MILAGE. IF I EVER SWAP OUT C-4 FOR AOD, I WILL GEAR TO 3.56 AND IMPROVE THE CAM. BUT THAT IS A PROJECT FOR ANOTHER DAY.

TAKE CARE- IF I CAN HELP, JUST EMAIL.
MIKE
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Old 08-23-2004, 05:59 PM   #11 (permalink)
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\'99 Explorer 5.0 engine (GT40P) question(s) for \'65 mustang

There is no threaded boss on the late 5.0 engines for the clutch equalizer bar to mount into. You'll need an adaptor bracket if you have a std tranny. They should be available from the Mustang parts suppliers.
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Old 08-24-2004, 11:27 AM   #12 (permalink)
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\'99 Explorer 5.0 engine (GT40P) question(s) for \'65 mustang

Tri-Y headers for GT40P heads will fit a 65 Mustang no problem. Call Central Coast Mustang in Tehachapie, Ca.
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Old 02-07-2005, 01:37 PM   #13 (permalink)
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\'99 Explorer 5.0 engine (GT40P) question(s) for \'65 mustang

I've seen Central Cost Mustang mentioned for Tri-Y headers from a lot of folks. Can anyone tell me where thier website is or a phone number? I can't find them anywhere!

-Dan
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