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Old 01-10-2004, 09:45 PM
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347 Ford Stroker questions

hey guys on my way to planning and buying all the parts i need to make my 347 storker motor....
i already have the block and GT 40 heads...
i am wondering what cam and intake combo i should use to get lower end torque..... im looking for a sweet street/strip racer... i also dont wanna put a HUGE cam into it due to the fact i want to drive it regularly.... any help would be apreciated.
oh what size carb would you use as well.... ANYONE have a stroker that could throw some advice my way??

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Old 01-10-2004, 09:56 PM
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I can't really help you very much, but I know my friend's 5.0 has the Ford Motorsports "F" cam in it and he loves it. I have driven it and it has a great sound at idle and it pulls damn nicely low and mid range...I dunno if it would be different with the stroker, but I think it would be nice....He is also selling a used "B" cam (not from his motor), pm me if you are interested...
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Old 01-10-2004, 10:22 PM
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i guess i should add i want to use a edelbrock torker intake i already have its a HIGH rise single plane.
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Old 01-11-2004, 07:06 AM
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If it's low end torque you are looking for, a dual plane intake is your best bet. I've got a Weiand Stealth on my 331 and it's got lots of torque (300+ftlbs from 3k to 5800 rpm at the wheels). And that's with a relatively mild custom ground cam.
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Old 01-11-2004, 07:07 AM
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Cams and carbs are always the things people want to go too big on. I would advise dropping a dime and call whatever cam mfg. you want to go with and let them reccomend what cam you need by what info you supply. Unlike most of the people on the board, they have incentives to satisfy a customer and will stear you to the best grind for your needs. I see too many questions on this board about what type cam to use, when all the cam companies have staff that do just that, why not use them?
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Old 01-11-2004, 11:43 PM
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Quote:
Originally posted by woodz428
Cams and carbs are always the things people want to go too big on. I would advise dropping a dime and call whatever cam mfg. you want to go with and let them reccomend what cam you need by what info you supply. Unlike most of the people on the board, they have incentives to satisfy a customer and will stear you to the best grind for your needs. I see too many questions on this board about what type cam to use, when all the cam companies have staff that do just that, why not use them?
i understand what u r saying, but y have this forum? if these ppl never ask, how are they ever going to get the idea to go call a bunch of companies. some ppl on this forum may have expierence with certain products and companies, and it helps to hear, when u are spending money on something, that somebody else has the same part and it worked great for then, just some assurance. so thats y i ask on here first.
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Old 01-12-2004, 12:45 PM
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What car is this motor going in? There are some big problems with the GT40 heads with headers... namely none of them fit on the heads AND in the car, so you have to get custom headers. I was going to get some too, but summit gave me the dirt on them. Good luck with them-

Cam: 275-280, comps are nice, a roller woudl REALLY get you that bottom end due to good ramp speeds (not friction like most people think). A cam in that range would give you some decent chop and pretty good low power. You could go a little smaller if that much bothers you, especially if you go roller.

Carb, no bigger than 600-630. Bigger is NOT better with carbs because you want the smallest possable that will give you your power, it helps keep the airflow velocity up and give you the low end torque you're looking for.

A nice bite can be gotten from a stall converter, you wouldn't have to go above 2000-2400 and it would give you a great launch. This is a must.

K
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Old 01-12-2004, 02:16 PM
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my oct 2003 custom classic truck mag has a buildup or should i say review of a Smeding 302 stroked to 347. it has the following: new block, scat crank with 3.4 in. stroke, new rods with 3/8's bolts instead of stock 5/16's, special piston with 1.09 compression hgt, edelbrock performer heads with 2.02 intake valve, balance job, notched bore bottoms in block, ala 383, fel pro one piece rear main seal, double row timing chain, new timing chain cover, a dished piston optional for 87 octane, roller cam cost is $4895, 380hp at 4600rpm, cam is 212/222 degrees of int/exh, at .050 and .489/.510 int/exh lift. 112 seperation angle , fully adjustable aluminum roller rocker arms. , new oil pump, balancer. hope that helps some.
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Old 01-12-2004, 03:20 PM
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As far as a cam goes, I'd recommend looking into a custom cam that is spec'd for your specific combination. IMHO, a custom cam gives optimum performance for a given engine.

If I were going with a off the shelf cam, I'd stick to a single pattern cam. After market heads normally have an excellent intake to exhaust ratio and do not need the extra help that a dual pattern cam offers.

Check out the Isky cams site in the Tech 2000 tips. Look at #2003:

http://www.iskycams.com/techinfo_index.html

Good info from a pro.
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Old 01-12-2004, 06:53 PM
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347

In my humble opinion, unless you are building this engine for racing, stay away from a 347, go no more than a 3.25-3.3 stroker. The problem with 347's, even though they are torid engines, is that the oil rings go around the wrist pin, being very conducive to oil consumption, as my son found out when he put one in his daily driver 93 mustang. From what I have seen and heard, the factory B-303 cam is an excellent hot street cam and probably as big, duration wise as you should go. If running a factory cam doesnt set well with you, check around for after market cams of similar duration specks. You might contact Camresearch in Englewood, Colorado, as they are ford specialists, and do excellent custom grinds. Another source would be Racer Walsh in Florida. Walsh races what he sells and has extremely good prices too boot.
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Old 01-12-2004, 07:18 PM
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Re: 347

Quote:
Originally posted by Max Keith
........ the oil rings go around the wrist pin, being very conducive to oil consumption.........
The piston in my 331 is a SRP flat top. No ring land interference with this one.

I don't know how long ago your son put the 347 in his Mustang, but these days the "oil consumption" problem is pretty much a non-issue. Lots of folks running that stroker now with no reports of excessive/unusual oil burning.

The piston makers either make them like mine or they include some kind of oil rail support which eliminates any problems due to the wrist pin intersecting the ring lands.
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Old 01-12-2004, 07:29 PM
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347 build up

Thanks for the update on the 347 piston rings. He had his engine built by a shop back in 96. I know at that time, the 347's were still a relatively new thing on the street. Glad they got the oil consumption thing under control. Being so advised, I withdraw my naysaying about the 347 stroker kit.
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Old 01-13-2004, 05:49 AM
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Since it appears that you're going to put this into a 79 Fairmont, why not just put a 351W in it? You have the room, it's not fuel injected. Personally I see no reason to build a 347. Check the 5.8, GT40 Lightning motor on sale at www.karkraft.com for $2895. Not only is it slightly bigger in cu.in., but it's also a much stronger motor mechanically.

I thing the savings on the motor will probably more then offset the specific 351W accessories.
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Old 01-13-2004, 05:03 PM
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i use a tfs-cam stage 1 in my 88 GT and it run pretty good. nice idle, pull strong and it dont need major spring valve. i also use Twited wedge head and trick flow track heat intake. i have a friend who use this cam with GT-40 head and it feel alomost the same power at low rpm...but our car are EFI..i dont know how much power you will put with a carb.....

just my 2 cent

hugo
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Old 01-13-2004, 07:28 PM
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Here's what I'm running in my car. It's a '95 Mustang GT, and it's been converted over to carb.

My first time out with the 347, it was still fuel injected. I ran a pair of GT40 heads (not the Ps..........that's where the headers/heads not matching up comes into play), Lunati 1087 camshaft, Cobra Intake, 4.10 gears, off road h-pipe with 2.5" exhaust and shorty headers. Stock injectors, throttle body, mass air meter, fuel pump and pressure. Ran 12.78 @ 108.50 just as we lost a head gasket. Had idle probs out the wazoo because of the EEC. Off subject, but IMHO, the GT40 heads are an EXCELLENT choice. Hell, they propelled me into the 12s as a 302!

Second time was when we converted to carbed. We ran two Edelbrock 600 cfm carbs, a Weiand Tunnel Ram, Victor Jr alumnum heads, and a TFS stage 3 camshaft (this is .574/.595 lift). Everything else stayed the same (exhaust, gear ratio, etc). Had some tuning issues and didn't make it to the track, but the car did feel stronger. I attribute the added HP to the better cam and heads, and the loss in low end to the tunnel ram, which was too much for our set up.

This time, we're coming out with the TFS stage 3 cam, Vic Jr heads, and pretty much everything the same. EXCEPT........we bought a Performer RPM intake, and we're gonna run a single Edelbrock 800 cfm carb.

When looking to choose a cam, we need to know what kind of RPM you'll be looking at; if you're going with a power adder or staying N/A; and if this is a street car or a race car. IMHO, off the shelf Motorsport cams are EXCELLENT for 302s, 306s and the like. But when you get up in the cubic inches, the cam physically acts smaller (hence my running the Lunati for less than 200 miles). I read somewhere that when you're stepping up almost 50 cubic inches, you're losing like 8* of duration. If you need ANY help whatsoever, please feel free to email me, or my husband Jerry @ fivelitergt95@hotmail.com .
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