331 vs. 347

NOSfairlane · July 26th, 2009, 11:45 PM

Ok so im planning on a stroker i have a 1990 302 block to use in my 95 heard the block is stronger. How reliable is the 347 i have heard they burn lots of oil and you must cut alot of metal out of the block to make it fit. Is this true or does the 331 use the same amount of oil? It is supercharged with Ford Racing alum. heads and an F303 cam. How often must i rebuild the 347 i want a quick streetable car. I dont want something i have to rebuild every 20k miles. Any input on either motor would be great

Also would a set of total seal rings work better? Less oil use????

ReverendDexter · July 27th, 2009, 12:05 AM

Short answer is go 347, for the long answer, dig around, this has been discussed at length several times

95StangMX · July 27th, 2009, 12:31 PM

Oh bOY here we go again................DARRELL you have a phone call on line 1....LOL

All the crap you have heard is completely that, hearsay the 347 and 331 use the same bore .030 and there are no issues with the wristpin intersection or the ratio....it is all stuff made up by someone who was pissed they built a 331 for the same money they could have built a 347

93hatch · July 27th, 2009, 02:47 PM

339

Stangzilla · July 27th, 2009, 03:10 PM

The 331-347 is like a 2 stroke engine. U will have 2 rebuild it every 5-7000 miles or after 25-40 passes at the drag strip..

Just build a 408 all they burn is 331's & 347's... lol.. seriously though just get a 347 kit from DSS or the likes. As far as the rings go whatever they recommend with the kit that u r buying get. It is important to tell the tech that you order from what your goals are so they can set u up with the correct parts if u r not experienced enough to do so yourself..

MOTOIMPAIRED · July 27th, 2009, 03:24 PM

Originally Posted by 93hatch

339

My sisters grandmothers brothers nextdoor neighbors dog has a 347 and it burns oil!!

93hatch · July 27th, 2009, 03:27 PM

just buy the 347 kit

1slo5.0 · July 27th, 2009, 03:39 PM

Holy fuck........

superbean · July 27th, 2009, 03:57 PM

Originally Posted by Stangzilla

The 331-347 is like a 2 stroke engine. U will have 2 rebuild it every 5-7000 miles or after 25-40 passes at the drag strip.. Just build a 408 all they burn is 331's & 347's... lol.. seriously though just get a 347 kit from DSS or the likes. As far as the rings go whatever they recommend with the kit that u r buying get. It is important to tell the tech that you order from what your goals are so they can set u up with the correct parts if u r not experienced enough to do so yourself..

worst advice i've heard all day.

superbean · July 27th, 2009, 03:57 PM

Originally Posted by 1slo5.0

Holy fuck........

*pats Darrell on the back. It will be ok i promise

Haggis13 · July 27th, 2009, 04:43 PM

Why can't people use the search feature?

88Saleen · July 27th, 2009, 07:28 PM

ok sorry guys but here we go

i was chatting with a local machinist who has built quite a few 347's and 331's. what he told me was that the 347's piston was much shorter than the 331, therefore the piston actualy rocks in the cylinder a lot more than a 331 would becuase of the taller piston.. just wanted to ask if you guys ever hurd of soemthing like this. i understand what he is saying, just wondering what you guys thought. he said a 347 would be a more race applicatable motor while a 331 would def be a better choice for a more streetable and weekend racer.

sorry but what you guys think?

1slo5.0 · July 27th, 2009, 07:37 PM

Without getting into this stupid arguement that never ends because people that have no idea what they are talking about give advice on the subject, all I am going to say is I've had a few daily driven 347s that have seen more miles than most peoples shit box econo cars and have never burned a drop of oil. I know many people with 347s that have no issues at all. One guy has way over 100,000 miles on it and also has an S-trim with 12lbs of boost on it. No issues at all. The end.

Lind · July 27th, 2009, 08:37 PM

i think thats at least 8 times this week that this has been explained lol

NOSfairlane · July 31st, 2009, 11:27 PM

well from the looks of it i believe a 347 is the way to go i would like to just get rid of these 347 JE dish pistons and run flat tops the blower is gone but thanks for all the input much appriciated

Arctic Fox · August 1st, 2009, 07:09 AM

Originally Posted by NOSfairlane

i would like to just get rid of these 347 JE dish pistons and run flat tops the blower is gone

Dish is better than flat top power wise, just mill the heads for more compression.

July 26th, 2009, 11:45 PM	#1
NOSfairlane Newbie 1990 Mustang GT N/A Join Date: Mar 2009 Location: Carlisle Posts: 17 Blog Entries: 1 iTrader: 0 reviews	331 vs. 347 Ok so im planning on a stroker i have a 1990 302 block to use in my 95 heard the block is stronger. How reliable is the 347 i have heard they burn lots of oil and you must cut alot of metal out of the block to make it fit. Is this true or does the 331 use the same amount of oil? It is supercharged with Ford Racing alum. heads and an F303 cam. How often must i rebuild the 347 i want a quick streetable car. I dont want something i have to rebuild every 20k miles. Any input on either motor would be great Also would a set of total seal rings work better? Less oil use???? Last edited by NOSfairlane; July 26th, 2009 at 11:47 PM. Reason: addition

July 27th, 2009, 12:05 AM	#2
ReverendDexter Priest of the Car Gods Clapped-out '90 GT 'vert ~5.5 seconds off TTOD :( Join Date: Jan 2007 Location: Rohnert Park, CA Posts: 13,808 iTrader: 0 reviews	Short answer is go 347, for the long answer, dig around, this has been discussed at length several times __________________ O o /¯/______________________ \|BLAAAAAAAAAAAAAAAAAAAAAAAAARGH!!! \_\

July 27th, 2009, 12:31 PM	#3
95StangMX MM Fanatic 95 Mustang GT depends how many people are pushing Join Date: Oct 2007 Location: Playa del Carmen, Mexico Posts: 3,243 iTrader: 0 reviews	Oh bOY here we go again................DARRELL you have a phone call on line 1....LOL All the crap you have heard is completely that, hearsay the 347 and 331 use the same bore .030 and there are no issues with the wristpin intersection or the ratio....it is all stuff made up by someone who was pissed they built a 331 for the same money they could have built a 347 __________________ People should think about boarding up their glass house before starting a rock fight!

July 27th, 2009, 02:47 PM	#4
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	339 __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

July 27th, 2009, 03:10 PM	#5
Stangzilla MM Fanatic Join Date: Aug 2006 Location: On my way to Baines's house!! Posts: 3,298 iTrader: 0 reviews	The 331-347 is like a 2 stroke engine. U will have 2 rebuild it every 5-7000 miles or after 25-40 passes at the drag strip.. Just build a 408 all they burn is 331's & 347's... lol.. seriously though just get a 347 kit from DSS or the likes. As far as the rings go whatever they recommend with the kit that u r buying get. It is important to tell the tech that you order from what your goals are so they can set u up with the correct parts if u r not experienced enough to do so yourself.. __________________ Rotating The Earth 1320 Feet At A Time!! Today, I found out that when I masturbate at night while watching internet porn I cast a huge shadow on the curtain and the entire street is able to see it.

July 27th, 2009, 03:27 PM	#7
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	just buy the 347 kit __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

July 27th, 2009, 03:39 PM	#8
1slo5.0 MM Ninjas! 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: North Fond du Lac, Wisconsin Posts: 11,375 iTrader: 1 reviews	Holy fuck........ __________________ My daily driver has 16 cylinders and 4400hp @ 1000 rpm.... ***1988 Mustang GT - Stock....almost

July 27th, 2009, 04:43 PM	#11
Haggis13 Enthusiast 1993 Mustang GT Join Date: Sep 2006 Location: Ottawa, Ontario, Canada Posts: 593 iTrader: 0 reviews	Why can't people use the search feature? __________________ Bart 93 Black on Black GT Kenne Bell S/C GIVE 'ER!

July 27th, 2009, 07:28 PM	#12
88Saleen Enthusiast 1988 Mustang Join Date: Apr 2008 Location: Grand Blanc, Michigan Posts: 832 iTrader: 0 reviews	ok sorry guys but here we go i was chatting with a local machinist who has built quite a few 347's and 331's. what he told me was that the 347's piston was much shorter than the 331, therefore the piston actualy rocks in the cylinder a lot more than a 331 would becuase of the taller piston.. just wanted to ask if you guys ever hurd of soemthing like this. i understand what he is saying, just wondering what you guys thought. he said a 347 would be a more race applicatable motor while a 331 would def be a better choice for a more streetable and weekend racer. sorry but what you guys think?

July 27th, 2009, 07:37 PM	#13
1slo5.0 MM Ninjas! 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: North Fond du Lac, Wisconsin Posts: 11,375 iTrader: 1 reviews	Without getting into this stupid arguement that never ends because people that have no idea what they are talking about give advice on the subject, all I am going to say is I've had a few daily driven 347s that have seen more miles than most peoples shit box econo cars and have never burned a drop of oil. I know many people with 347s that have no issues at all. One guy has way over 100,000 miles on it and also has an S-trim with 12lbs of boost on it. No issues at all. The end. __________________ My daily driver has 16 cylinders and 4400hp @ 1000 rpm.... ***1988 Mustang GT - Stock....almost

July 27th, 2009, 08:37 PM	#14
Lind Enthusiast 1994 Ford Mustang GT Join Date: Sep 2006 Location: Shawano, WI Posts: 579 iTrader: 0 reviews	i think thats at least 8 times this week that this has been explained lol __________________ www.moddedmustangs.com

July 31st, 2009, 11:27 PM	#15
NOSfairlane Newbie 1990 Mustang GT N/A Join Date: Mar 2009 Location: Carlisle Posts: 17 Blog Entries: 1 iTrader: 0 reviews	well from the looks of it i believe a 347 is the way to go i would like to just get rid of these 347 JE dish pistons and run flat tops the blower is gone but thanks for all the input much appriciated

Remove Advertisements Sponsored Links
Ford Mustang Forum Advertisement

Threads Similar to: 331 vs. 347
Thread	Thread Starter	Forum	Replies	Last Post
331 or 347?	817B!GT3X	5.0 Mustangs	63	May 26th, 2008 04:39 PM
331 vs. 347	usmcsawgunner	5.0 Mustangs	25	February 7th, 2008 01:53 PM
331 or 347?	89lx	5.0 Mustangs	34	December 19th, 2007 10:46 PM
331 Or 347	e3sean	5.0 Mustangs	43	November 20th, 2007 11:45 PM
331 or 347	Fastpitchdad	5.0 Mustangs	17	September 16th, 2006 04:47 AM

All times are GMT -4. The time now is 09:56 PM.
Contact Us - Modded Mustangs : Ford Mustang Forums - Privacy Statement - Top
Modded Mustangs is ©2005-2008, All Rights Reserved, And is Not Affiliated with Ford Motor Company. Forum is powered by vBulletin ©2000 - 2012, Jelsoft Ent. Ltd. & SEO by vBSEO 3.3.2 ©2009, Crawlability, Inc.