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 5Likes
01-16-2021, 05:28 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
Quote:
Originally Posted by daverascal
I have a 408 Winsor in my car. I had planned on a BBF but my engine builder talked me out of it. He said the hp to weight ratio isn't there unless you build a mountain motor. My only advice is to use best internal parts you can buy. My only regret on my build, I used a Ford block and I'm at the limit of the block. I have main stud girdle and arp studs everyplace. If i could do it over I would have used a dart block.
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Girdles don't do anything, unfortunately. Lots of nice photos of SBF blocks split in half with the girdle holding the main caps together.
The 302/5.0 block won't take as much horsepower before letting go, but unless you're making over 600 hp with that 408, you're in no danger of hurting it. |
01-16-2021, 07:27 AM
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CC Member
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Join Date: Jul 2011
Location: Shelby,
oh
Cobra Make, Engine: acc
Posts: 103
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Not Ranked
Quote:
Originally Posted by blykins
Girdles don't do anything, unfortunately. Lots of nice photos of SBF blocks split in half with the girdle holding the main caps together.
The 302/5.0 block won't take as much horsepower before letting go, but unless you're making over 600 hp with that 408, you're in no danger of hurting it.
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Made 615 rwhp 3 years ago on dyno. I try not to crank it too hard. So far no problems. But I figure it's a matter of time before it craps out. Already have a plan to build a 434 sbf lol |
01-16-2021, 09:48 AM
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CC Member
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Join Date: Apr 1999
Location: cleveland,
OH
Cobra Make, Engine: CSX4000, 427
Posts: 1,999
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Not Ranked
Quote:
Originally Posted by blykins
Girdles don't do anything, unfortunately. Lots of nice photos of SBF blocks split in half with the girdle holding the main caps together.
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I'm guessing the girdles offer about the same improvement that cross-bolt mains will add.
__________________
"After jumping into an early lead, Miles pitted for no reason. He let the entire field go by before re-entering the race. The crowd was jumping up and down as he stunned the Chevrolet drivers by easily passing the entire field to finish second behind MacDonald's other team Cobra. The Corvette people were completely demoralized."
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01-16-2021, 09:56 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
Girdles are about useless....
Cross bolted mains or splayed 4-bolt mains are where it's at.
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01-16-2021, 10:49 AM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Jeez, he wants a "weekend driver" car, which means a nice stroked FE that puts out 1HP/Cubic Inch, maybe a little more, and that won't break on him for a few years. That's a piece of cake for any of the builders around here and, on the street, 450 horses will kill him in an instant if he drops his guard. Easy.  |
01-17-2021, 10:22 AM
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CC Member
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Join Date: Feb 2006
Location: Gilroy,
CA
Cobra Make, Engine: SPF 2291, Whipple Blown & Injected 4V ModMotor
Posts: 2,741
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Not Ranked
Quote:
Originally Posted by patrickt
Jeez, he wants a "weekend driver" car, which means a nice stroked FE that puts out 1HP/Cubic Inch, maybe a little more, and that won't break on him for a few years. That's a piece of cake for any of the builders around here and, on the street, 450 horses will kill him in an instant if he drops his guard. Easy. |
These are known as self correcting problems that, over time, can clean up the gene pool ...
Ed
__________________
Help them do what they would have done if they had known what they could do.
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01-16-2021, 11:09 AM
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CC Member
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Join Date: Aug 2013
Location: Canandaigua,
NY
Cobra Make, Engine: SPF MKII Riverside Racer FIA
Posts: 2,507
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Not Ranked
Quote:
Originally Posted by Anthony
I'm guessing the girdles offer about the same improvement that cross-bolt mains will add.
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When my engine builder had the engine apart he showed me that the girdle was not even touching the center mains and was therefore not providing any additional support to them. It was only really providing some support at the ends. Not what I thought a girdle was supposed to do. Not nearly as strong as cross-bolt or splayed bolts.
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02-08-2021, 11:04 PM
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CC Member
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Join Date: Jul 2005
Location: San Tan Valley,
AZ
Cobra Make, Engine:
Posts: 194
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Not Ranked
Quote:
Originally Posted by Anthony
I'm guessing the girdles offer about the same improvement that cross-bolt mains will add.
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I don't know if he still has them, But Bessel Motorsports in MO use to make a keyed main cap for the Windsors that would eliminate cap walk.
The girdles might slow it down a tad, but they certainly won't eliminate it. |
01-17-2021, 02:15 AM
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CC Member
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Join Date: Jul 2005
Location: San Tan Valley,
AZ
Cobra Make, Engine:
Posts: 194
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Not Ranked
Quote:
Originally Posted by blykins
Girdles don't do anything, unfortunately. Lots of nice photos of SBF blocks split in half with the girdle holding the main caps together.
The 302/5.0 block won't take as much horsepower before letting go, but unless you're making over 600 hp with that 408, you're in no danger of hurting it.
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Perhaps....but you won't drive over the crankshaft. |
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