I have been saving up to stroke out my 5.0 and have been looking at the 342 stroker kit, but i also have been looking at the 347 stoker kit, but i have a standard bore. if i get a 347 stroker i would need to bore out the motor, but i dont know how much that will be. The 342 stroker kit can go on a standard bore, or so it says. i have not really seen any 342 strokers so i dont know how fast they could. i would appreciate any advice available.
'89 notchback: upper and lower intake manifold, 70mm tb, cold air filter, headers, h pipes,
I have been saving up to stroke out my 5.0 and have been looking at the 342 stroker kit, but i also have been looking at the 347 stoker kit, but i have a standard bore. if i get a 347 stroker i would need to bore out the motor, but i dont know how much that will be. The 342 stroker kit can go on a standard bore, or so it says. i have not really seen any 342 strokers so i dont know how fast they could. i would appreciate any advice available.
'89 notchback: upper and lower intake manifold, 70mm tb, cold air filter, headers, h pipes,
Depends on your budget. Gotta take it to a machine shop to bore it (I would recommend this if it's a rebuild anyways). 342 isn't going to make a bunch less power, but most people just bore it 30 over.
The idea of the 342 is a stroker with a new block……..gives you the option of another rebuilt in the future without going the standard 30 over.
I don’t know of many engine shops who wont insist you bore 30 over on a rebuilt.
So the question is do ya have a new block lying around or most likely using your old block.
Also most new kits have fixed the oil pin problem which caused excessive oil burn and shortened the life of the 347. The oil pin used to intersect with the ring grove causing the oil leak, make sure when you buy a kit this is not the case.
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So , let me get this straight…..your Honda has 1.6 liters, whereas my bottle of Mountain Dew has 2?
Change…..it’s what is left after taxes.
- Shaken....Not Stirred 2003 Mach I Auto Torch Red - Sold
-1988 Ford Mustang GT Convertible, 331 Trick Flow Stroker with a Tremec 3550....oh yea and a 1.6 liter V-TECH motor to work the convertible top.
- 1966 Inline 6……..the pile of parts car!
Engine rebuilders will insist on overboring only to "true up" the cylinders (make sure they are the same uniform size from cylinder to cylinder and completely round, from the top of the bore to the bottom of each cylinder). Overboring an engine does not make any discernible power.
Oil consumption has nothing to do with where the piston pin boss is located. That is an Internet and magazine myth. It has everything to do with how the engine is machined and finished, in other words, clearances and or tolerances of the finished product. Loose = oil consumption. Tight = no oil consumption.
Engine rebuilders will insist on overboring only to "true up" the cylinders (make sure they are the same uniform size from cylinder to cylinder and completely round, from the top of the bore to the bottom of each cylinder).
I agree that’s why they insist.
Quote:
Originally Posted by FoxChassis
Overboring an engine does not make any discernible power.
I agree a couple of inches in displacement will not do that much but if we take this statement as said you are stating engine displacement doesn’t effect horse power.
Quote:
Originally Posted by FoxChassis
Oil consumption has nothing to do with where the piston pin boss is located. That is an Internet and magazine myth. It has everything to do with how the engine is machined and finished, in other words, clearances and or tolerances of the finished product. Loose = oil consumption. Tight = no oil consumption.
It is no myth I know 2 people that had 347 with oil problems, if it was a myth then they would not of redesigned the piston that so the wrist pin was not inside the oil-ring lands. I did tons of research before I built my 331 and at the time they did not have the new pistons that solved the problem. Its hard to make something tight with a large whole running right through it.
So , let me get this straight…..your Honda has 1.6 liters, whereas my bottle of Mountain Dew has 2?
Change…..it’s what is left after taxes.
- Shaken....Not Stirred 2003 Mach I Auto Torch Red - Sold
-1988 Ford Mustang GT Convertible, 331 Trick Flow Stroker with a Tremec 3550....oh yea and a 1.6 liter V-TECH motor to work the convertible top.
- 1966 Inline 6……..the pile of parts car!
I agree a couple of inches in displacement will not do that much but if we take this statement as said you are stating engine displacement doesn’t effect horse power.
I said an OVERBORE makes no difference.
Quote:
Originally Posted by countymounty
I know 2 people that had 347 with oil problems, if it was a myth then they would not of redesigned the piston that so the wrist pin was not inside the oil-ring lands. I did tons of research before I built my 331 and at the time they did not have the new pistons that solved the problem. Its hard to make something tight with a large whole running right through it.
I can come up with just as many people as you, and their piston pins DO intersect the oil control ring land, and they don't have a damn lick of oil consumption.
Redesigned pistons were a feel-good measure for people that insist that the 'old' design consumed oil every time. MYTH. MYTH. MYTH.
I'm just a dumb old country boy..but I know more C.I.D makes more power,but a .30 overbore on a 302=306,will 4 CID make that much difference?-I don't think so.On the same note,will a 347 make THAT much more power than a 342?-If you don't have to bore it,why do it? As mentioned,once it's done-that's it.if you rebuild with stock bore when practical you can bore later on a rebuild if you need to.
But I will research something before I make a decision,from as many sources as possible/are available to me...and I agree with county mounty,make sure you get a stroker with the piston pins BELOW the oil rings.
I cannot say from experience yet,but when I do my stroker,the pins WILL be below the rings.
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"Life is not a journey to the grave with intentions of arriving safely in a pretty well preserved body,but rather to skid in broadside,thoroughly used up,totally worn out and loudly proclaiming.....WOW!.....What a ride!
"As you grow older,don't slow down,speed up-there's less time left"--over 45 and just now realizing how much I don't know
I can come up with just as many people as you, and their piston pins DO intersect the oil control ring land, and they don't have a damn lick of oil consumption.
Redesigned pistons were a feel-good measure for people that insist that the 'old' design consumed oil every time. MYTH. MYTH. MYTH.
Im not going to argue but ill say for fact that I have had personal experiance with my first 347 in the 86 burning oil...nothing major about 1/4 quart about every 3000 miles. we ended up pulling it just befor i sold it and put a diff rotating assembly in with JE pistons pin not intersecting the oil land and the issue was non-existant. Im just saying that it isnt a myth. Im sure there are some with major success..but you cant dismiss the facts.
You know if i was to build another 5.0 which ive debated the last few weeks. I might go with one of those long rod 306's...nice high rev motor.
j
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2004 mustang gt
Update: JLT CAI, SLP LM2 catback,
Parts in the basement : To much to list. heres a hint..it involves a watts link and turbos.
I’m not sure but I don’t think you can find any pistons anymore with the wrist pin was not inside the oil-ring lands, unless you find someone wanting to move old stock….but it is better to ask the find out later.
And again on the 342 if it is a new block I sure would go 342, but if you order a 342 and have a used block better check with your machine shop, I would be REALLY surprised if they would be willing to put a new rotating assembly in a used non over bored block.
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So , let me get this straight…..your Honda has 1.6 liters, whereas my bottle of Mountain Dew has 2?
Change…..it’s what is left after taxes.
- Shaken....Not Stirred 2003 Mach I Auto Torch Red - Sold
-1988 Ford Mustang GT Convertible, 331 Trick Flow Stroker with a Tremec 3550....oh yea and a 1.6 liter V-TECH motor to work the convertible top.
- 1966 Inline 6……..the pile of parts car!
talking about 347 how much hp do you guys think i can get out of a stock 94gt block with
347stroker kit
e303cam
1.7cobra roller rockers
cobra upper and lower intakes
motor bored 30over
stock heads ported and polished
and longtube headers
forged everything
umm...if i was to do a stroker build it would be a 331...they are more reliable than a 342 or 347..and they get the same amount of power...just wanted to give ya a heads up!
Where is the proof that a 327/331 is "more reliable" than a 342/347?
thats what i wanna know too!
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91 gt,327 stroker 10.8-1 compression , sportsman block std. bore,scat forged crank and rods, JE pistons, trick flow track heat fully raced preped heads, custom n2o cam, victor 5.0 upper and lower, 75mm tb, 36lbs injectors, 2 stage hit of spray, PA c-4 tranz w/ break, 3600 9 inch stall, 8.8, c clip elem. 3.73, spool, 2 way adj. uppers, south sides lower, eibach drag springs and lakewood 90/10 - 50/50, converted all to 5 lug, on 26 inch drag radials!...100% street car!
i have never had a problem in fact one of my motors is doing double duty as a daily driver and a weekend warrior 10.30's on spray has not come apart yet....
to coin a phrase ......no replacement for displacement
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Reggie
Real Racers Don't Street Race
PERIOD.......
'88 LX Hatch With A Little Of This & A Little Of That...... 10.39 @128 MPH Soon to be faster....
342 stroker or 347 stroker 
