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Author
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Topic: How Do I Tell If I Have A 331 Or 306?
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PopTheHood
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Member # 7040
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posted
 
 
I just recived a shortblock that i purchased. On the reciept it says that i ordered a 306. I opened the package and started checking out the motor. Its totaly wrapped in plastic and on the side there is a tag that says that it is a 331 stroker. do you think they sent the wrong shortblock? or is the labeling of the block wrong? how do i tell the difference between the two? If they sent me a 331 instead of a 306 im not complaining. ![[Big Grin]](biggrin.gif) that would be awesome.
Posts: 185 | Registered: Sep 2006
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AJBlackGT
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Member # 3936
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posted
Measure how far down the piston travels in the bore. A 306 will be 3" and a 331 will be 3.25".
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90 Notch
Posts: 1896 | From: Sacramento | Registered: Dec 2003
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PopTheHood
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Member # 7040
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posted
all right thanks. what are the advantages and disadvantages if it is a 331? would twisted wedge heads and a stage 1 cam be ok on that motor? thats what i got cuz i was expecting a 306.
Posts: 185 | Registered: Sep 2006
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PopTheHood
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Member # 7040
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posted
the bore on the cylinders is right about 4 inches and the stroke travels right about 3.25 inches.
Posts: 185 | Registered: Sep 2006
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Sk8OnGlass
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Member # 6370
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posted
so you got a 331 ... (nice )
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First On Race Day
FORD
yup that's my stang in da pic
Posts: 533 | From: san Jose, CA. | Registered: Jan 2006
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AJBlackGT
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Member # 3936
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posted
quote:
Originally posted by PopTheHood:
the bore on the cylinders is right about 4 inches and the stroke travels right about 3.25 inches.
If you measurements are correct it's a 331. Can you see a part number on the crank?
The heads will be alright, cam a little on the small side, but it will work.
edit: where did you buy it from? Are you sure you didnt pay for a 331, and it sent with the wrong receipt or something?
[ December 13, 2006, 05:05 PM: Message edited by: AJBlackGT ]
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90 Notch
Posts: 1896 | From: Sacramento | Registered: Dec 2003
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PopTheHood
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Member # 7040
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posted
Dss racing. I bought a pro bullet 306 for $2,219. on the reciept it says 306 pro bullet. on the wrapping the block came in it says 331 pro bullet.
Posts: 185 | Registered: Sep 2006
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CMELEVU
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Member # 2563
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posted
Sounds like you scored. Turn the block over and see if the cyl walls are clearenced for the longer stroke.
Posts: 201 | From: Marysville | Registered: Mar 2003
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RED@7kVERT *8850GT*
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Member # 5909
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posted
damn...thats a come up!!! niiice....
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2016 Mustang GT PP- Don't care lol
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Sold:02 Z06-11.0 @ 132
Sold:05 CTS-V-13.1 @ 114
Sold:01 Cobra Vert-12.0 @ 119
Posts: 2432 | From: -916- | Registered: Aug 2005
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PopTheHood
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Member # 7040
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posted
5.0Stroker written on the main support system
Depth of the stroke
size of the bore/piston
Windage tray
Pistons
Motor 1
Motor 2
Motor 3
Posts: 185 | Registered: Sep 2006
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92stangLX
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Member # 3252
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posted
quote:
Originally posted by PopTheHood:
all right thanks. what are the advantages and disadvantages if it is a 331? would twisted wedge heads and a stage 1 cam be ok on that motor? thats what i got cuz i was expecting a 306.
The advantage is more torque. There are really no disadvantages if it is built right except for the slightly extra cost. You should make pretty good power with those heads and cam.
Posts: 5302 | From: San Francisco | Registered: Sep 2003
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kingmoochr
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Member # 5834
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posted
check valve clearance, you might need more with those pistons
Posts: 881 | Registered: Jul 2005
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88bird
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Member # 1424
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posted
Don't forget, most likly your gonna need a 28oz balancer and flywheel.
The 50oz stuff may not work (depending how it was balanced)
Posts: 149 | From: Citrus Heights | Registered: Jun 2002
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JBeezy53
CAFords OG
Member # 3960
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posted
You must have been a good boy this year!
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89 Gt
98 Cobra
88 Notch
05 GSXR 750 Blk/Yel
Posts: 1782 | From: Sacramento, Ca | Registered: Jan 2004
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v-town coupe
fordologist
Member # 2771
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posted
quote:
Originally posted by PopTheHood:
Dss racing. I bought a pro bullet 306 for $2,219. on the reciept it says 306 pro bullet. on the wrapping the block came in it says 331 pro bullet.
looks like im calling dss today and ordering a 306 and hopefully my 347 will be here next week!!!
good deal u lucked out run it!! ![[patriot]](graemlins/patriot.gif)
Posts: 4597 | From: the V-town | Registered: May 2003
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PopTheHood
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Member # 7040
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posted
Hey V-town, you from Vallejo? what you drive? i might have seen you around.
Posts: 185 | Registered: Sep 2006
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v-town coupe
fordologist
Member # 2771
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posted
i used to have a peweter and silver drop top with a vortech on it about 6yrs ago and then i hade a jade green notch about 2-3 yrs ago and the cougar has been in hidding but i have done a couple test drives around town recently and its orange and silver two tone
Posts: 4597 | From: the V-town | Registered: May 2003
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PopTheHood
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Member # 7040
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posted
Guess not. Have you seen that white and orange bel air runnin around? That thing is nice. I drive the red and black 85 convertable.
Posts: 185 | Registered: Sep 2006
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adower
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Member # 5955
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posted
Im calling DSS and asking for the popthehood special
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98 Cobra
Griggs
S Trim
HRE
Posts: 3327 | Registered: Aug 2005
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Mr.Lucky
CAFords OG
Member # 1772
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posted
quote:
Originally posted by adower:
Im calling DSS and asking for the popthehood special
+1 lol
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95GT: Bolt ons.
Good sellers/buyers: Stangs R Us, 1SicGt, sn4bwc, racsirx, WickedStang, Autumnstang97, cali95gt
Posts: 4197 | From: Manteca | Registered: Sep 2002
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PopTheHood
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Member # 7040
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posted
Thats funny!! PopTheHood Special.. haha
I got started on the project today. I got the old motor pulled.
[ December 14, 2006, 09:38 PM: Message edited by: PopTheHood ]
Posts: 185 | Registered: Sep 2006
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2stangs69-91
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Member # 1951
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posted
I hope it came with a ballancer and a flywheel because 331's and 306's can use different ballance weights. Most 331's are 25 oz. and 306's are 50 oz. Hopefully yours is the same. If after you start it you feel a big vibration this is why.
Posts: 3711 | From: Redding | Registered: Oct 2002
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PopTheHood
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Member # 7040
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posted
It needs a 28oz balancer and flywheel which are on their way here.
Posts: 185 | Registered: Sep 2006
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SPEC -Fabrication
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Member # 4980
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posted
quote:
Originally posted by PopTheHood:
Guess not. Have you seen that white and orange bel air runnin around? That thing is nice. I drive the red and black 85 convertable.
yeah, I did all the chassi work on it , 4 link, 9" also sports a 468ci
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1999 Saleen#124
1997 Tahoe
2006 ZX636R
CWS certified welder
Posts: 1321 | From: drinkin BEER! | Registered: Oct 2004
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88DroptopGT
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Member # 2535
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posted
quote:
Originally posted by PopTheHood:
Guess not. Have you seen that white and orange bel air runnin around? That thing is nice. I drive the red and black 85 convertable.
The one with no hood and a nice interior?
That thing used to be at Bud's all the time. That car was sick!
Posts: 3978 | From: 707 | Registered: Mar 2003
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