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Author
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Topic: 331 build...
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dTb
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Member # 6939
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posted
 
 
Ok guys im trying to get the most sound equipment the first time without too many problems because there will always be problems...I'm thinking about the streetfighter 331 stroker kit with a compression ratio of about 8to1...the only thing is that i'm not sure that my valvetrain will support it because i have already blown a rod and gone thru a set of rocker arms on my 306, e cam, x heads, forged pistons, and gt-40 manifold...if i upgrade my valvetrain to support the stroker kit, what would you recomend???
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dTb
Posts: 568 | From: sacramento | Registered: Jul 2006
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JohnB
Tech Moderator
Member # 969
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posted
What does the valvetrain have to do with a rotating assembly? ![[Confused]](confused.gif)
Is it a blown or turbo setup? 8-1 is gonna be a dog NA...
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1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
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dTb
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Member # 6939
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posted
ima get it blown...but i wanna make sure that the valve train will be able to support everything else...not gonna charge it rite away tho...should i think about 9 to 1 and juss go lower boost???
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dTb
Posts: 568 | From: sacramento | Registered: Jul 2006
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98slowhoe 'FIFTYLX'
Uncle Frank
Member # 895
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posted
There are guys on this site that have more then that in Comp ratio and are just fine. Just as 2stangs.
As far as your valve train, what John is trying to say is, it doesn't really matter what your displacement is or antying in the rotating assembly that is really gona effect your valvetrain. There is something else going wrong up there for things to be breaking. Might be the wrong push rod lenght or the wrong rocker studs. or a number of other things. If you just use the same parts on a 302, 306, 319, 331, 342, or 347 you are probably gona get the same results in the valve train, if it aint right. Figure that out first.
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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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JohnB
Tech Moderator
Member # 969
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posted
A good set of rockers working with the proper pushrods and cylinder heads are all you need. ![[Big Grin]](biggrin.gif) (is that better Aaron?? ![[Razz]](tongue.gif) )
Go with a head that will accept stud mount 7/16" studs. Match a set of rockers with true rollers and the proper length pushrod for your cam selection, you'll be good to go.
As for the compression ratio, I'd stick with 9-1. That way you can drive it NA until you're ready to step up. ![[Smile]](smile.gif)
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1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
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t-top50
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Member # 2735
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posted
quote:
Originally posted by JohnB:
A good set of rockers working with the proper pushrods and cylinder heads are all you need. (is that better Aaron?? )
Go with a head that will accept stud mount 7/16" studs. Match a set of rockers with true rollers and the proper length pushrod for your cam selection, you'll be good to go.
As for the compression ratio, I'd stick with 9-1. That way you can drive it NA until you're ready to step up.
LOL
no no no my friend. this one is not mine.
Aaron
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87GT t-top
00 Saleen (clone)
97 E350 7.3 diesel
Posts: 2522 | From: Brentwood | Registered: Apr 2003
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JohnB
Tech Moderator
Member # 969
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posted
It was directed to 98slowhoe ![[Wink]](wink.gif)
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1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
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t-top50
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Member # 2735
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posted
opps that right. Wrong Aaron. stupid me.
[ January 31, 2007, 01:41 AM: Message edited by: MPP*formerly t-top50* ]
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87GT t-top
00 Saleen (clone)
97 E350 7.3 diesel
Posts: 2522 | From: Brentwood | Registered: Apr 2003
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2stangs69-91
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Member # 1951
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posted
2stangs finaly hurt a piston with a lean out....ooops. I will be up and running soon your video inspired me I have had zero issues with the GT40X valvetrain with either the 1.7's or 1.6 ford rockers. I also run comp cams double springs and a bigger cam than the E303(which I also ran with my 1.7 rockers). good luck
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69 Mustang on hold
1991 LX hatch getting a make over
1994 F150 4X4 351
2006 Yamaha V-max 1200 Modded
Posts: 3711 | From: Redding | Registered: Oct 2002
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