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Author
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Topic: Input on 306 turbo build
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nycreep50
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Member # 9735
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posted
 
 
Looking for alittle guidness have a306 short block with aftermarket internals going to turbo (yes I know the stock block won't hold to much hp b4 cracking etc)
my questions are should I spend extra on arp rod bolts, dss main gridle, etc. I Have head studs already,also a good headgasket and what thickness??????
this is were I went for help after much time researching on the Internet but I would like actually help from 5.0 fans that's been down this road
thanks
Posts: 50 | From: 707 | Registered: Jan 2010
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JohnB
Tech Moderator
Member # 969
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posted
The main question is "how big are you going with this?"
My advice...a cheap set of forged rods, flattop 9-1 forged pistons, and a stock crank. Balance the rotating assembly, have someone build it that KNOWS what they are doing (read: not your corner NAPA auto) and leave the girdles for the girls. Stud the heads and mains, run a 9333 FelPro HG and make sure it has plenty of fuel.
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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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nycreep50
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Member # 9735
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posted
Sounds good, thanks for ur input
Posts: 50 | From: 707 | Registered: Jan 2010
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trickflow211
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Member # 8503
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posted
John Wats wrong w a girdle ?
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1990 Cobra Clone 421 Tq 420 Hp
Need General Contractor Services? 925-338-5422 serving East Bay Area over 20yrs
Posts: 2449 | From: Pittsburg/Sacramento | Registered: Jul 2008
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JohnB
Tech Moderator
Member # 969
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posted
quote:
Originally posted by trickflow211:
John Wats wrong w a girdle ?
1. Nearly no one installs them correctly, leading to it being the main cause of bearing failure.
2. Break a crank, sh!t is going everywhere anyway...a girdle won't save it.
3. Break a block...same thing.
4. Break a rod...you just destroyed your girdle.
5. If you are making that much power, it'd be a 4 bolt main..and not a production block.
6. IMO, waste of money. A good line hone with a ARP main stud set is plenty.
Many people swear by them, and that's fine. I'm not one of those people. ![[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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migs66/92
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Member # 4811
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posted
listen to johnB he knows his stuff
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Ill keep my guns and my money, you can have the change
Posts: 343 | From: lodi ,cal | Registered: Aug 2004
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ISP89LX
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Member # 8949
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posted
quote:
Originally posted by migs66/92:
listen to johnB he knows his stuff
+1 the mann knows his sh!t, just gave me lots of good advice on a 351 build.
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89LX
Turbo50built!!!
Wait, he jacked my shit!!!
"Dan will make It rite" THIEF!
Posts: 2997 | From: Nowhere to be found. | Registered: Feb 2009
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trickflow211
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Member # 8503
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posted
Kk thanks ... cus I'm building a 331 stroker n am worried about splitting the block due to too much HP ..wat else will strengthen the bottom end ? I was going to stud it already...
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1990 Cobra Clone 421 Tq 420 Hp
Need General Contractor Services? 925-338-5422 serving East Bay Area over 20yrs
Posts: 2449 | From: Pittsburg/Sacramento | Registered: Jul 2008
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essasin
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Member # 4741
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posted
Besides what was said I don't think there is anything else. If you want to go to the extreme, I've seen build threads where they cemented their blocks. I am not sure how much it helps but racirx went 9s on his stock block that was cemented and I've seen a few other fast combos on corral with cemented production blocks.
Posts: 2402 | Registered: Jul 2004
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wilit
Mustang Messiah
Member # 3367
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posted
The block splits in the lifter valley, so there's not a whole lot you can do to strengthen it. There's a kit that runs a couple of braces in the valley, but I haven't met anyone who runs them. Here's the kit. http://www.nmradigital.com/forums/showthread.php?t=47626
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"If a man hasn't found something worth dying for, he isn't fit to live." - Martin Luther King Jr.
Posts: 4793 | From: 37.78514° North 122.40100° West | Registered: Oct 2003
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Jaejae5.0
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Member # 7958
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posted
paging rasirx
Posts: 4890 | From: the combustion chamber | Registered: Oct 2007
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nycreep50
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Member # 9735
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posted
I am also wondering the samethings. I have a 306 short block, b&g turbo piping and going to run 1 turbo. but have two turbo to chose from a 76 trim and a 60 trim. I know it will split the block but I don't want to do it after hitting peak boost a couple of times. So as much as I can do to prevent that I will or best yet low boost?
Posts: 50 | From: 707 | Registered: Jan 2010
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nycreep50
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Member # 9735
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posted
I am also wondering the samethings. I have a 306 short block, b&g turbo piping and going to run 1 turbo. but have two turbo to chose from a 76 trim and a 60 trim. I know it will split the block but I don't want to do it after hitting peak boost a couple of times. So as much as I can do to prevent that I will or best yet low boost?
Posts: 50 | From: 707 | Registered: Jan 2010
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trickflow211
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Member # 8503
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posted
that girdle that runs in the valley looks like it would work pretty good! anyone heard anything about them ? or have any input?
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1990 Cobra Clone 421 Tq 420 Hp
Need General Contractor Services? 925-338-5422 serving East Bay Area over 20yrs
Posts: 2449 | From: Pittsburg/Sacramento | Registered: Jul 2008
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racsirx
CAFords OG
Member # 1710
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posted
The girdles are a waste of money, yes I went 9s with a cemented stock block, 28oz, 306 with Eagle rods and SRP pistons and a T70 turbo. I also use the Felpro PT9333-1 headgaskets. Anything over 450HP, there is a great chance a stock block will break, I made around 650HP but I only drove my setup at the track and only ran straight C16 race gas and I knew it could break at anytime. Also I would only use a 28oz or 0oz setup if you planning on making a race motor.
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88 Saleen #564
88 GT 331 NOVI2000
88 Coupe TURBO 9.75@142
95 Cobra R #75-SOLD
06 F250
13 BMW AH3
17 GT350 #5556
GOD'S NOT DEAD
Posts: 20750 | From: Concord & Pittsburg, CA | Registered: Aug 2002
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