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Why Are D.S.S. Main Supports So Important?

 It seems that everybody today is trying to get more and more power from their engines.  Increasing engine RPM’s, or adding nitrous, turbos' or superchargers are some sure ways to increase power, but they can be very tough on durability.  Additional stresses generated by running higher RPM’s or using power adders are transferred directly through the pistons, rods and crankshaft  to the block’s main webbing.  Commonly, the reciprocating force can overwhelm the main bearing caps and the fasteners that hold them in place.  Under heavy loads, the caps will shift or “walk” from side to side.  This movement is transferred to the ends of the main cap fasteners, causing the threads to become fatigued.  Eventually the main web cracks, leading to a loss in oil pressure and possibly total destruction of the block and internal components.  To combat this problem, Ford Racing offers Splayed Four-Bolt main racing blocks.  While excellent pieces, the price puts them out of reach for the average enthusiast.  This is where the D.S.S. Main Support System comes in.  Starting at $329.95 the D.S.S. Main Support System is a very cost-effective way to add strength to a production block without breaking the bank.

  Made of  3/4” Billet 6061-T6 aluminum,  the D.S.S. Main Support System effectively dampens damaging harmonics, virtually eliminating main bearing walk.  The Main Support Plate is fastened to the main caps using custom ARP main studs (included), effectively  tying all five main caps together. By adding another main web structure you dramatically increase the block’s strength, helping both block and crankshaft life.  Our Main Support System makes it possible to produce 650-plus horsepower from a production block.
Picture above shown with optional D.S.S. Racing Pro Tray windage Tray.

Close-up of main web/ main cap parting surfaces

Shown in the photo's at right is the metal transfer or welding that takes place in high horsepower, ( above 400 HP. ) production block engines.  This is a direct result of main cap walk.  The D.S.S. Main Support System helps eliminates main cap walk and the metal transfer that occurs, protecting the block and rotating assembly. 

Cracking the main webbing in a production block is common on engines without a Aluminum Main support to dampen the harmonics. The D.S.S. Main Support System Adds an additional 3/4" thick main web to support the main and dampen the Harmonics that crack blocks. This system Has been Race proven in numerous  650+ Hp production block applications . 

When the main caps are allowed to move on a production block so does the main bolt or stud. With the bolt or stud prying on the block like a pry bar It doesnt take too long to crack the threaded hole in the block.

Rick Merick has run our Super Pro 306  over 400 passes in the 9.70's . Running 300 HP. NOS is tough on parts. Our Super Pro 306 with Billet Aluminum Main Support is the key to high horse power production block life.

 

Chris Beary Relies on The D. S. S.
Main support and Pro Tray windage Tray to protect his D.S.S. XR 306 Renegade engine from Main cap Walk. At his horsepower level ( 8.70's )even a 4 bolt Main Boss block walks caps without it.

 

"Captain" Keith Kohlmann's dominating season with 4 first place finishes and 2 runner ups in NMRA Truck & Lightning, winning the world finals in Bowling Green, KY along with another class championship making him the 2005-2006 back-to-back Champion!  DSS Super Pro 331 Bullet! 10.03 @135MPH!Over 400 passes and 2 championships on a D.S.S. Level 20 production block with a D.S.S. Aluminum Main support System!

 

Bob Kurgan 's Drag Radial \ Xtreme Street car
D.S.S. BIG-BORE 363 XR 1350 H.P.
7.88@ 175 MPH!
" Main Cap walk was a big problem on my 4 bolt main race block. My block needed to be align honed every 30 or 40 runs. The cap register's were getting so loose the caps would just fall off. D.S.S. installed there Aluminum Main support in the off season of 2006. I ran the entire 2007 season (well over 100 passes) and countless dyno pulls with out touching the D.S.S. XR363 bottom end. When D.S.S. freshened the engine for the 2008 season it was the first time the caps were still tight in the register and no align hone was required."
Thanks For The Great Product,  Bob Kurgan

 
 

When you make big Horsepower Even 4 bolt Splayed caps wont save you from the damage that Main Cap walk causes. The answer is to dampen the harmonics that cause the main caps to move in the first place. The D.S.S. Aluminum Main Support System is the only system on the market that addresses this problem.

Note all the metal transfer on the cap parting surface. This fretting is caused by the cap walking back and forth, friction welding transferring metal between the cap and block.

 

Note the block side damage. This picture shows the stakeing process needed to tighten up the cap register. Main cap walk has pounded the registers out of the block making the caps loose. Scrapping the block or Stakeing to tighten it back up and align honing is the only fix at this point. The D.S.S. Aluminum Main support System would have prevented this.
Here is a D.S.S. XR363 Drag Radial / Xtreme Street engine after the New Main support and Pro Tray Windage Tray was designed and installed for the first time. Just like the First Main support we Designed and fabricated over fifteen years ago, we did it to fix a problem. Our Design / Manufacturing capabilities and commitment to the sport is what allows us and our customers to continue pushing the envelope







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#7005 302 Stroker Pro Tray Windage Tray
Reg Price: $146.28
PRICE: $119.95
You save $26.33!

7005
D.S.S. Main Support System shown installed with the Pro Tray windage tray
302 Ford Stroker Main Support System with custom ARP main studs
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351W Ford Stroker Main Support System with custom ARP main studs
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1020 Main Support
351W Stroker Pro Tray Windage Tray
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7010
D.S.S. Main Support System shown installed
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1035 Main Support
D.S.S. Main Support System shown installed with the Pro Tray windage tray
4.6/5.4 Modular Ford Main Support System Fits 2V and 4V Cobra engines with custom ARP main studs
Reg Price: $463.35
PRICE: $379.95
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1030 Main Support
429/460 Big Block Pro Tray Windage Tray
Reg Price: $159.28
PRICE: $129.95
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7015
460 Ford Main Support System with custom ARP main studs
Reg Price: $463.35
PRICE: $379.95
You save $83.40!

1050 Main Support
D.S.S. Main Support System shown installed with the Pro Tray windage tray
D.S.S. 5.0X BOSS stroker Main Support System with custom ARP main studs
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PRICE: $379.95
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1002 Main Support