Is 347 worth the money?

[Sloney50]

I have never ridden, or driven a 347 stroker. I have a stock 302 block and Im having it bored .030. My question is should I spend the money and forge it with a 347 or stick with a 306 kit? I am planning on running a set of AFR's on it. On my headed 302 i spray but want to build something in the 400 HP range so I dont have to spray.........Any thoughts are very much appreciated!
:bigthumb

[cstreu1026]

As I see it if you aren't interested in going with a windsor then yes a 347 is worth it. There is no replacement for displacement.

[mustangboy]

My 347 makes 400 to the wheels w/ Vic Jr heads and spider intake setup and 9.5-1 compression. I say well worth it.

[Squale iii]

I heard 347s like to burn oil, is that true?

[cstreu1026]

I think it depends on the piston design. If I am remembering correctly some pistons have the pin relocated in to the oil ring.

[85_SS_302_Coupe]

Well let me put it to you like this....i was driving a 302 with the same heads/intake/carb as my 347 has now...the only difference was the cam and swapping short blocks to a stroker, and the cam itself wasn't that much bigger than what i was running. The 302 ran 12.8s spinning drag radials through 2nd gear...i'd say it could've gone 12.5 or a little better on stlicks with a low 60 foot. To put it short, the stroker vs. the 302 even with almost the exact same parts bolted to it compared to the 347 is like what it feels like going from a 2.3 to a 302. It's that much of a difference. The car went from being quick and entertaining to almost scary if you take it for granted and let it get away from you. It's still by no means a crazy unstreetable racecar but it's like night and day, and the sick part is my compression almost stayed the same so if you go with a higher compression piston you'll get an even better gain than i did.

My only regret is that the block i bought wasn't a stroked 351 lol. If i bought the parts and built an engine myself i'd absolutely go with a stroked Windsor but you can't go wrong with a 347 IMO.

[Sloney50]

So for it not to burn oil do I need to look for a specific rod/pin design?

[bbfstanger]

the shorter rod is 5.315 vs the 5.4 in alot of kits.
ive built many engines with the oil ring going into the pin ,never had a oil prob.
dont believe all the hype on it.
also for what it costs for a 347 a 418 windsor isnt much more.

[AntiRice427]

I regret building my 347. Should have built a stroked windsor. A 306 with a nice used blower isn't a bad idea for the money.

[Timido]

the shorter rod is 5.315 vs the 5.4 in alot of kits.
ive built many engines with the oil ring going into the pin ,never had a oil prob.
dont believe all the hype on it.
also for what it costs for a 347 a 418 windsor isnt much more.

Or a 427-440-460 might as well use a dart block! Actually the bigger the engine the bigger everything else needs to be.

[93RedNotch]

I know the scat stroker kits have the new design so they claim they dont burn oil. They arent too expensive either.

[NXcoupe]

They don't use oil any more than a 306 would. Low tension ring designs will use more oil, new 347 kits come with higher tension ring sets. I loved my 347, ran great, and everyone I have built has made great power. We had an opportunity to compare apples to apples, when a customer's 306 had a corner of the block chip off. He said since we were going ot have to swap blocks, why not put a 347 in it? I said cool and we built it. Everything identical to the 306(cam, heads, intake, etc), it made 50+ hp more with the 347. That should give you a good idea.

[Jeff88coupe]

My 347 put down 420rwhp/400rwtq through a 5sp n/a when I originally built it to be a street/strip motor. Ran a best n/a of a 10.84 at 124 at 3250#. I've since made it a nitrous motor with a C4. I have the set of AFR 185s for sale that I originally had on my motor for sale in the classifieds if your interested.

[draggin50]

If you come up sunday Ill let ya ride in mine. Its Mikes (NXCoupe) old 347. The reason I stuck with the 347 over a windsor was I didnt want to buy new headers, intake, and distributor, and all the other stuff to go with it.

[Sloney50]

Awesome! That would give me a good idea. Just another incentive to come up Sunday huh?!

[draggin50]

Awesome! That would give me a good idea. Just another incentive to come up Sunday huh?!

Sounds good. its just a low compression 347 but still made 340 hp with a little blower cam.

[Stangman]

Steves LX also has a 347 in his car... that thing is a freakin rocket!

[zmcnutt]

look into a 331 kit if your concerned about burning oil thats what I built and im very happy with it

[93snake]

Dont believe all the hype about burning oil, early designs might have had more problems but the 347 kits that I have been using havent had any major oil problems. Go with a 347 and be happy, good luck

[outlaw85]

x1000 I really like the 8.2 deck 347 they run real well and like having the hell beat out of them LOL. The only substitute for cubic inch is RPM or should I say MONEY!!!

[85_SS_302_Coupe]

x1000 I really like the 8.2 deck 347 they run real well and like having the hell beat out of them LOL. The only substitute for cubic inch is RPM or should I say MONEY!!!

Yeah really. I showed my Chevy buddy the video of you launching and shifting my engine at 7400 and he about crapped his pants. It was pretty funny.

[outlaw85]

Yeah really. I showed my Chevy buddy the video of you launching and shifting my engine at 7400 and he about crapped his pants. It was pretty funny.


Hell Yeah! LOL
Great example that motor isn't nothing fancy at all and runs real strong. I had the following in that video you seen!

4.030 stock oem Ford roller block
347 rotating assembly (forged dished Pistons)
Anderson N-111 Hydraulic Roller Cam
Crane Lifters
RHS-ProTopline 200CC Aluminum Heads (mild port) Anderson BH Springs 55cc. 10.5 to 1 CR.
2.02 1.60 valves
Parker Funnel Web Intake (gasket match)
Custom 850 Quick Fuel Carb (2 tenth gain)
4.30 Gear

Went a Best of 10.59@128 - 1.37 60 ft. N/A in my Fox Body leaving and shifting at 7,400.

[draggin50]

which video is that Josh? I wanna see!!!

[85_SS_302_Coupe]

Now if only i had half those parts on the block :lol:

[outlaw85]

It's just one Derek's G-Friend took a couple years ago at UMTR with a camera phone. Not real good quality but its the only ones I got of that combo on the net.

There's also one of Derek's budget 331 with out of the box performer's on our site also.

http://www.jjracing2008.com/VIDEOS.html

[331TwistedWedge]

331 here, i wish i would have went with a 347 ... i know its not a huge difference but almost 20 hp is a nice gain for the same $$$ ....

if you want to bust a$$, here is your recipe .... a 347 with TEA or Foxlakes Twisted Wedge 185 cnc program ... i wouldnt be shocked to see 430 to the wheels ...

give me another 2 months and my 331 with home ported twisted wedge heads will be on the dyno/track ... B&M Air Flow Technology engineered my heads :lol:

[graysonracin]

I had a 347 built with one of the older scat kits, it used a little oil but honestly nothing like i had heard. It has p/s a/c and still fuel injected and put down 346 to the wheels at md. I even have the cheap edelbrock vic jr knock off pro comp heads. I would probably build another one.

[Camaro86SHOCKER]

I built a 347 a while back thats in a white 85 on here. Forget his s/n. while we had that car that motor was awesome. It idled great, didn't burn any oil. I would build another, but for the similar money i think i would go 408 next time in a fox. I didn't go 351 originally because the 302 in the car was just so perfect. Hell it only had 30k. Just couldn't see replacing it, so i made it faster lol. I think the 347's are like anything else, you get what you pay for. Buy junk parts, get a junk motor. No expense was spared while building the one i did and when i was done i could beat the hell out of it and drive it to work everyday (and did), never once worried about it breaking down. I know i put about 10k on it and it never gave me a bit of trouble.
I wish we still had that car, it should never have been sold...oh well, too late now. I'm just glad the current owner of it is happy and hope they give me a heads up if it ever goes back up for sale.
I often think of yanking my 302 out of my 95 and stroking it to 347 but i just hate to tear into something that runs so great and is always dependable no matter how hard i beat on it, plus the sn's aren't quite as easily accepting...stupid computers.
One day though...i'll do it again. so my advice...go for it.

[Steves LX]

I have never ridden, or driven a 347 stroker. I have a stock 302 block and Im having it bored .030. My question is should I spend the money and forge it with a 347 or stick with a 306 kit? I am planning on running a set of AFR's on it. On my headed 302 i spray but want to build something in the 400 HP range so I dont have to spray.........Any thoughts are very much appreciated!
:bigthumb

Not sure what your schedule is like. But I go thru Eastgate everyday to and from work. I will be driving my car everyday this week. My truck is in the shop for repairs. If you want I can swing by your house or meet you somewhere and give you a ride. Just PM me your phone # and we can set a day and time for anyday this upcoming week. I'm putting down close to 400 as well to the rear tires N/A.

[AntiRice427]

I built a 347 a while back thats in a white 85 on here. Forget his s/n. while we had that car that motor was awesome. It idled great, didn't burn any oil. I would build another, but for the similar money i think i would go 408 next time in a fox. I didn't go 351 originally because the 302 in the car was just so perfect. Hell it only had 30k. Just couldn't see replacing it, so i made it faster lol. I think the 347's are like anything else, you get what you pay for. Buy junk parts, get a junk motor. No expense was spared while building the one i did and when i was done i could beat the hell out of it and drive it to work everyday (and did), never once worried about it breaking down. I know i put about 10k on it and it never gave me a bit of trouble.
I wish we still had that car, it should never have been sold...oh well, too late now. I'm just glad the current owner of it is happy and hope they give me a heads up if it ever goes back up for sale.
I often think of yanking my 302 out of my 95 and stroking it to 347 but i just hate to tear into something that runs so great and is always dependable no matter how hard i beat on it, plus the sn's aren't quite as easily accepting...stupid computers.
One day though...i'll do it again. so my advice...go for it.

I had a 347 in both of the SN95s that I have owned and the computers worked fine. After my 95 was tuned it ran exactly the same and made the same hp as it did before the tune.