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Author
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Topic: 306 or 347 Cid
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BlownNOSMustang
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Member # 158
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posted
 
 
I have a 1993 GT. What say you as far as a new motor goes. Its not a daily driver. Week ends and 2 time's to So Cal a year. I want smog legal and streetable. It currently has a 302 with a vortech S trim, 30 LB injectors 70mm t body. Thanks for reading.
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1993 Hatch,363 CI,670 RWHP
Posts: 238 | From: Cow Town,USA. | Registered: Feb 2001
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turbo50
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Member # 6700
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posted
347 based on a good block, not a stock block.
keep it on the "smog legal" fence.
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.........when was the last time YOU built something with YOUR own hands?
I offer quality sidework at reasonable prices. PM ME
Posts: 7606 | From: Discovery Bay, California | Registered: Apr 2006
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BCINGUU
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Member # 2397
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posted
Once you go with a 347, you will never again be able to go back to a lower stroke. There is no way to describe the blast you will get out of the torque produced by a 347 stroker motor. You can't beat a 347. It will ruin all other motors for you.
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93 Cobra #4563 347ci 12.0@118 505rwhp 524tq
90 GT "Saleen Cobra" style convertible 347ci
67 GT "Eleanor" style coupe 347ci
Posts: 1425 | From: San Jose, CA | Registered: Jan 2003
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98slowhoe 'FIFTYLX'
Uncle Frank
Member # 895
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posted
You could even go with a 331 but might as well get some extra cubes and get a 347. I think whatever you do don't get a 306, not really enough power difference to be worth it.
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AKA Franky Freaking 5 liter
Advanced Engine Development
SCT dealer
Dynotuning
Engine building
916*275*8212
88 4runner on 42's
Posts: 4206 | From: Folsom | Registered: Feb 2002
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MustangNate
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Member # 4559
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posted
Keep in mind, when going to a 347 it uses a 28oz balance so you will need to replace things like the balancer. A 331 uses the same 50oz balance so you won't have to replace anything more.
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1989 Mustang LX Vert, 5.0 Auto
Posts: 1032 | From: Chico | Registered: May 2004
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98slowhoe 'FIFTYLX'
Uncle Frank
Member # 895
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posted
quote:
Originally posted by MustangNate:
Keep in mind, when going to a 347 it uses a 28oz balance so you will need to replace things like the balancer. A 331 uses the same 50oz balance so you won't have to replace anything more.
Thats new info to me since I run 28 on my 331.
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AKA Franky Freaking 5 liter
Advanced Engine Development
SCT dealer
Dynotuning
Engine building
916*275*8212
88 4runner on 42's
Posts: 4206 | From: Folsom | Registered: Feb 2002
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turbo50
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Member # 6700
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posted
quote:
Originally posted by MustangNate:
Keep in mind, when going to a 347 it uses a 28oz balance so you will need to replace things like the balancer. A 331 uses the same 50oz balance so you won't have to replace anything more.
When I ordered my kits I had to specify balance and rear main seal configuration.
You can also get internally balanced but that is big money, usually.
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.........when was the last time YOU built something with YOUR own hands?
I offer quality sidework at reasonable prices. PM ME
Posts: 7606 | From: Discovery Bay, California | Registered: Apr 2006
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uh0h50
CAFords OG
Member # 3125
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posted
why not drop a 351 windsor in there?
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AP1 S2000
Posts: 2926 | From: Bay Area 510 | Registered: Jul 2003
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BCINGUU
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Member # 2397
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posted
Some guys like small blocks. I'm one of them. Small blocks are lighter than big blocks and when bored and stroked, a 347 can make more power than a 351. Fits better too.
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93 Cobra #4563 347ci 12.0@118 505rwhp 524tq
90 GT "Saleen Cobra" style convertible 347ci
67 GT "Eleanor" style coupe 347ci
Posts: 1425 | From: San Jose, CA | Registered: Jan 2003
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BlownNOSMustang
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Member # 158
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posted
Cool. Who would you reccomend? Would I still be able to use the S trim, or would I need it? My car is a five speed, the stock T-5, will I need to swap that out as well? Would it be smogable?
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1993 Hatch,363 CI,670 RWHP
Posts: 238 | From: Cow Town,USA. | Registered: Feb 2001
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BCINGUU
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Member # 2397
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posted
I run a Vortech SQ-trim at 12psi in my 93 Cobra with a 347, never had any problems and I've been running that setup for years. I have the original stock T-5 and it works fine.
Regarding choices of 347 motors, I'm sure a lot of people will have recommendations. I've had 2 347 motors custom built, and I will never go that road again. Too many problems with the build and the builders don't back up their work when you have too many problems. I'll go with a crate motor next time and be sure to get a warranty.
[ August 09, 2007, 06:23 PM: Message edited by: BCINGUU ]
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93 Cobra #4563 347ci 12.0@118 505rwhp 524tq
90 GT "Saleen Cobra" style convertible 347ci
67 GT "Eleanor" style coupe 347ci
Posts: 1425 | From: San Jose, CA | Registered: Jan 2003
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MustangNate
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Member # 4559
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posted
quote:
Originally posted by 98slowhoe 'FIFTYLX':
quote:
Originally posted by MustangNate:
Keep in mind, when going to a 347 it uses a 28oz balance so you will need to replace things like the balancer. A 331 uses the same 50oz balance so you won't have to replace anything more.
Thats new info to me since I run 28 on my 331.
Buddy of mine runs a 50 on his 331? Maybe I'm wrong? Just go by what I've seen, that's why I always encourage people to get other opinions/input besides mine. ![[Smile]](smile.gif)
Now I have to go on a mission of reading and web searching lol. Thanks for settin' me straight! ![[patriot]](graemlins/patriot.gif)
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1989 Mustang LX Vert, 5.0 Auto
Posts: 1032 | From: Chico | Registered: May 2004
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turbo50
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Member # 6700
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posted
quote:
Originally posted by MustangNate:
quote:
Originally posted by 98slowhoe 'FIFTYLX':
quote:
Originally posted by MustangNate:
Keep in mind, when going to a 347 it uses a 28oz balance so you will need to replace things like the balancer. A 331 uses the same 50oz balance so you won't have to replace anything more.
Thats new info to me since I run 28 on my 331.
Buddy of mine runs a 50 on his 331? Maybe I'm wrong? Just go by what I've seen, that's why I always encourage people to get other opinions/input besides mine.
Now I have to go on a mission of reading and web searching lol. Thanks for settin' me straight!
You can get either.
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.........when was the last time YOU built something with YOUR own hands?
I offer quality sidework at reasonable prices. PM ME
Posts: 7606 | From: Discovery Bay, California | Registered: Apr 2006
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turbo50
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Member # 6700
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posted
quote:
Originally posted by BCINGUU:
Some guys like small blocks. I'm one of them. Small blocks are lighter than big blocks and when bored and stroked, a 347 can make more power than a 351. Fits better too.
Not to bag on you, you have a beautiful garage!, but a 351 windsor is a small block.
Even a stroked 351 (408) is still a small block.
I dont think you are speaking of a windsor motor.
..just FYI not trying to be a know it all punk.
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.........when was the last time YOU built something with YOUR own hands?
I offer quality sidework at reasonable prices. PM ME
Posts: 7606 | From: Discovery Bay, California | Registered: Apr 2006
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Mr.Lucky
CAFords OG
Member # 1772
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posted
quote:
Originally posted by turbo50:
[QUOTE]Originally posted by BCINGUU:
[qb]351 windsor is a small block.
Even a stroked 351 (408) is still a small block.
that is correct
Posts: 4197 | From: Manteca | Registered: Sep 2002
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J24I
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Member # 2598
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posted
Bill just get a 347 crate motor, and ditch the blower and sell it to me ![[Razz]](tongue.gif)
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*'87 Coupe
'89 Coupe-SOLD
Posts: 2131 | From: Bay Area(925) | Registered: Mar 2003
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BlownNOSMustang
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Member # 158
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posted
Jason,
You will never have my polished S Trim....
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1993 Hatch,363 CI,670 RWHP
Posts: 238 | From: Cow Town,USA. | Registered: Feb 2001
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Team SOLO
Chevy Powered Stang
Member # 722
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posted
quote:
Originally posted by turbo50:
quote:
Originally posted by BCINGUU:
Some guys like small blocks. I'm one of them. Small blocks are lighter than big blocks and when bored and stroked, a 347 can make more power than a 351. Fits better too.
Not to bag on you, you have a beautiful garage!, but a 351 windsor is a small block.
Even a stroked 351 (408) is still a small block.
I dont think you are speaking of a windsor motor.
..just FYI not trying to be a know it all punk.
I have a 408...but it's not stroked. Oh wait...it's not a ford motor either
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'88 Mustang Coupe: 8.02 @ 170
Posts: 3887 | From: Santa Clara | Registered: Jan 2002
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J24I
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Member # 2598
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posted
quote:
Originally posted by BlownNOSMustang:
Jason,
You will never have my polished S Trim....
![[Big Grin]](biggrin.gif)
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*'87 Coupe
'89 Coupe-SOLD
Posts: 2131 | From: Bay Area(925) | Registered: Mar 2003
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BlownNOSMustang
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Member # 158
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posted
Can I use my exsisting "S" trim vortech on the new motor? (347) Cid?
Posts: 238 | From: Cow Town,USA. | Registered: Feb 2001
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PWR HNGRY 302
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Member # 6000
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posted
I would say so, i dont see why you wouldn't be able to, that what iam planning on doing.
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87 Fox- Restoration in progress
2014 Tacoma DCLB MGM
2017 Prius Prime (The Daily)
Posts: 2655 | From: SF Bay Area | Registered: Sep 2005
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92stangLX
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Member # 3252
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posted
quote:
Originally posted by BlownNOSMustang:
Can I use my exsisting "S" trim vortech on the new motor? (347) Cid?
Sure, if you build the motor to be blower friendly. I think you will probably have serious traction issue with that setup. If you want to stick with the blower consider a 331. You will be able to make plenty of power with that motor and an S-trim.
Posts: 5302 | From: San Francisco | Registered: Sep 2003
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SmokinLX
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Member # 1684
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posted
quote:
Originally posted by BlownNOSMustang:
Can I use my exsisting "S" trim vortech on the new motor? (347) Cid?
If You are staying with a stock block then Why would You want a stroker with a S trim? 306 makes enough power to break a stock block. I have 306 with S trim & stockblock with around 600 fwhp and all I can say is it's a ticking time bomb! If You are going stroked and blown then You have to at least go with a sportsman block IMO. It would suck to drop 3-4k on a stroker and blow it up rite after.
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Dont claim power if ya cant mile per hour. 10 second AOD
Posts: 4388 | From: East Bay | Registered: Aug 2002
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Curt
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Member # 6254
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posted
Windsor FTW!
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'90 GT
'94 Toyota 4wd "It have problem"
'56 F100 5.8 AFR185's Vortech SC S-trim
Posts: 866 | From: Monterey/Rocklin | Registered: Nov 2005
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WickedStang
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Member # 7692
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posted
quote:
Originally posted by SmokinLX:
quote:
Originally posted by BlownNOSMustang:
Can I use my exsisting "S" trim vortech on the new motor? (347) Cid?
If You are staying with a stock block then Why would You want a stroker with a S trim? 306 makes enough power to break a stock block. I have 306 with S trim & stockblock with around 600 fwhp and all I can say is it's a ticking time bomb! If You are going stroked and blown then You have to at least go with a sportsman block IMO. It would suck to drop 3-4k on a stroker and blow it up rite after.
Yyp been there done that...LOL I had a stock H.O block that had a 347 kit on it the a 150 shot and guess what...? I got a hole on the block so
Smokin LX is right if u gonna go that route get a GOOD block. ![[Frown]](frown.gif)
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04 mach1 BASSANI EXHAUST/C&L INTAKE
67STANG/CHP 347/BUILT C4/MOROSO DRAG SUSP.
Posts: 1581 | From: salinas831 | Registered: May 2007
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