555 David Vizard Signature BBC Engine 825hp 732 lb/ft torque Triple Nickel

555 David Vizard Signature BBC Engine 825hp 732 lb/ft torque Triple Nickel
555 David Vizard Signature BBC Engine 825hp 732 lb/ft torque Triple Nickel 555 David Vizard Signature BBC Engine 825hp 732 lb/ft torque Triple Nickel 555 David Vizard Signature BBC Engine 825hp 732 lb/ft torque Triple Nickel 555 David Vizard Signature BBC Engine 825hp 732 lb/ft torque Triple Nickel 555 David Vizard Signature BBC Engine 825hp 732 lb/ft torque Triple Nickel 555 David Vizard Signature BBC Engine 825hp 732 lb/ft torque Triple Nickel 555 David Vizard Signature BBC Engine 825hp 732 lb/ft torque Triple Nickel 555 David Vizard Signature BBC Engine 825hp 732 lb/ft torque Triple Nickel 555 David Vizard Signature BBC Engine 825hp 732 lb/ft torque Triple Nickel
Brand: Walters Engines
Product Code: TW555BBC
Reward Points: 1900
Availability: In Stock
Price: $19,000.00
Price in reward points: 190000

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Terry Walters Latest Street Big Block Chevy Development 

The Triple Nickel 555 C.I. - 825 HP - 87 Octane Pump Gas.

In developing the Triple Nickel 555ci Terry Walters worked with F1 engine consultant and well known tech author David Vizard to create this monster street power motor that runs on cheap 87 octane fuel.

This engine will feature in David Vizards upcoming Volume II of the big block Chevy series he is writing.  PDF on this Engine.

This engine is also featured by Chevy Harcore Here & will also feature at the PRI Show with David Vizard & SCAT.

Watch The Awesome DYNO Runs


The Buyer of this Engine gets to spend a day with Terry Walters in Virginia and the chance to try their hand at some of the engineering work that goes into building an engine like this.  You'll also receive a personally autographed book from David Vizard, and maybe get the chance to meet the man himself (although we can't guarantee it).

Just in case 825 hp from 555 inches is not quite enough for you we have an 850 HP 572 CID version of this engine for a few bucks more. If running on 87 octane is not such a big issue then you might want to consider our 900 HP street strip 572.

So how did we achieve such a high output with what is essentially a moderately priced 87 octane fueled motor? Well it was not from a massive reduction in CR as that would have killed power thus defeating the object of the exercise. Sure the CR did come down a little. In this instance it was dropped from our normal 11/1 ratio for 93 octane fuel to 10.5/1.

From here it was a question of piston crown and combustion chamber development along with carb characteristics and a valve train that would absolutely make the most of the Vizard ported Darin Morgan/Profiler 320 street heads used.

The Darrin Morgan heads flowed well right out of the box and DV’s additional porting was, as he put it, little more than a fine tune up on Darin’s work. The results were good. Intake and exhausts were just shy of 400 and 300 cfm respectively on the bench. That was at 0.750 lift. Along with these figures the heads also delivered a fat curve which meant plenty of flow from the 2.3 inch intake valve throughout the lift curve. These are stout numbers for a port of nominally 320 cc.

The full results of these flow bench tests are for DV’s current book project – that is Volume II of the big block Chevy series he is doing. Volume I, which is getting rave reviews from pro engine builders, is on the book shelves now. The good news here is that if you want an autographed copy (availability limited) we have some at $30 a piece. What David did tell us is the Darin Morgan designed head was an excellent starting place for the job in hand. He also volunteered that Darin’s design work here did not leave much on the table so finding extra air was not exactly a breeze.

For the induction system we use another Darin Morgan designed component – a Sniper Jr. intake manifold. This was topped off with a 1270 CFM AED Dominator style carb. With all the bells and whistles on this carb to ensure smooth operation over the entire rpm range this carb was not cheap – but then quality parts never are.

The bottom end for the ‘Triple Nickel’ consists of a 4.5 inch bore and a 4.375 inch stroke crank. Here we use parts that will take more rpm than the engine is likely to turn. Our 600 inch bracket motors use a Scat 4.375 stroke crank and live indefinitely with the red line at 8,500 rpm. The Triple Nickels peak rpm is 7200 so reliability in this quarter can be expected to be very good.

As with any attempt to get serious power from a big block Chevy motor high intake valve lift is essential. As a rule of thumb for a 24 degree, paired intake port head equipped motor, about 0.100 lift is needed for every 100 hp being sought. So this meant coming up with a valve train that would be deadly reliable and still produce 0.800 lift at the valve. The valve train we finally settled on delivered 0.780 lift at the valve and will run to 7200 plus rpm without the use of a race spec spring. The cam profile itself was a solid roller but was an endurance grind. As for the opening and closing specs if you want these then figure on buying an engine and tearing it down because that’s the only way we let them out of the shop. A lot of time and effort went into developing the valve train as a whole and it is a vital element toward success.

It may seem that putting together a respectable valve train is just a matter of opening a cam manufacturers catalog and choosing the parts. Not so. For instance the 1.8/1 rocker we started with produced 17 hp less than the 1.8/1 rocker that David Vizard said we should use. Also forget the cam advance typically given by the cam companies as that was not as close as you might suppose. This build started off at about 740 hp in late 2010. Now as of August 2011 we are up to 825 hp after dozens of incremental changes to the engines spec. The nearby power curve shows the output as of this month (August 2011) but we are continually researching this combination.

Whatever you are looking for in terms of a cost effective street or street/strip big block Chevy we have you covered. Each of our builds is put together with the care and precision we put together our winning IHRA 800 plus inch ProStock engines so it goes without saying our quality is way more than that of a general jobbing shop turning out cheap engines while price is way less than a race only shop.
 

 

         David Vizard's Current Book Series                                           Actual DYNO Results of the Triple Nickel

                                   

       Terry's Senior Bulider fitting the Oil Pan                                                 Terry Walters Viewing those Massive Pistons

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