0Ron@Vengeance Racing

Vengeance Racing is known for producing extremely reliable combinations that produce excellent power. While documenting this engine build for our customer who lives several hundred miles away we thought it would be great to share all of the details on the forum to see the parts/detail that go into our builds.

The car: C6 Z06








The Engine: RHS 427 cubic inch stroker

• RHS Race Prep Block- 4.125 Bore x 4.00 Stroke
• Callies Magnum Crankshaft- 58x/LS7 "Snout"
• Oliver Billet Connecting Rods
• Diamond Custom Pistons- Coated Tops/Sides- H13 Tool Steel Pins
• Calico Coated Main & Rod Bearings
• CNC Ported LS7 Cylinder Heads
• Coated Chambers/Exhaust Ports
• Custom spec camshaft
• Morel Linkbar Hydraulic Lifters
• ARP Head Studs
• Ported/Blueprinted LS7 Oil pump
• Katech C5R Timing Chain

Power Adder: TVS 2300 Supercharger


Application: Road Racing

The Block- We opted for the RHS block for this build. Our customers #1 concern is reliability. Our next concern is making sure we have "room to grow" in the future once our customers gets used to the new combination. We have built several engines using the RHS block and they been proven to be extremely high quality and hold up quite well in the four digit HP range.



Machine work is always a concern when building any engine. Vengeance Racing uses Proline Race Engines to machine all of our shortblocks. Proline offers state of the art equipment as well as a tremendous amount of racing history and experience. We are proud to be the exclusive LS based engine distributor in the country for Proline Race Engines.

This particular RHS block was fully machined while at Proline. All aspects of the block are fully inspected to ensure no issues prior to starting any machine work. Once we know we are working with a usable the block is fully machined.

Once all of the machine work has been completed and the rotating assembly has been meticulously balanced the bare block is sent to the "clean room" for Proline Engine Builder Tim Lynch to inspect and assemble the bare block into a complete shortblock.

Here you can see the finished block being prepped for assembly.



The RHS block comes with Billet Main Caps for added strength



Here is the Callies Magnum 4.00" Stroke crankshaft prepped for install


We selected Oliver connecting rod for this build for their proven reliability and durability. You can also see the skirts on the Diamond pistons in this picture.



Here you can see all of the pistons/rods/pins prepped for assembly. You can also see the Calico coated rod bearings positioned in the Oliver Rods.

Pistons/Pins/Connecting rods assembled


Here is a nice shot of the custom Diamond pistons. This is a 4.125 Bore piston for use with LS7 cylinder heads. Additional options Ceramic top coating/Moly coated skirts/H13 Tool Steel Pins/Gas porting.

These options will come in handy when we turn up the boost down the road.



The block with main studs in place. Calico coated main bearings are in place as well awaiting the Callies Magnum crankshaft.



Here the crankshaft has been put in place and the main caps torqued to proper specification.


Close up shot of the RHS billet mains/Callies crankshaft/Oliver Rod Bolts

Top side picture with all pistons/rods installed. We now have a complete shortblock

At this point the engine is returned to Vengeance Racing for assembly to a complete longblock. Here is our engine table with all of the parts neatly laid out awaiting installation.

As mentioned above we are using Morel Linkbar lifters. The RHS block does not have a provision for the GM Lifter trays and we prefer to use linkbar lifters for added insurance.


We went with Innovators West 10% overdrive crankshaft pulley for this build. This will allow for more boost and also gives us the option to upgrade to an 8 rib setup in the future.


The LS7 cylinder heads have had extensive work to ensure reliability as well as increased performance. The heads were fully CNC ported for additional airflow. All valveguides were replaced and sized accordingly. New seats/seals. New Ferrea Titanium intake valves. Comp 26926 Dual spring kit installed. Chambers/Valves/Exhaust ports coated to reduce heat as much as possible


Cylinder heads are in place. ARP Head stud kit installed. Camshaft has been installed and degreed. Here is a shot of the Morel Linkbar lifters thru the valley of the block.


RHS Cam retainer plate. Notice the marks on the fasteners/retainer plate. We do this during assembly once each bolt is torqued. This also lets us see if the bolt has moved at all the next time we go into the engine for anything.

BgBoost1

Awesome Build!!

1SwtRide

RHS FTW!

SteveDoten

Tim Lynch? 10.5 Outlaw madness

Nice work.

EdsC6Z06

Looks like it will be a beast. Surprised they want to go forced induction for a pure road racer, but to each his own. Good luck on the build!

turbo raptor

great choice in parts. all top notch stuff. just wondering about the gas porting for street use

0Ron@Vengeance Racing

That would be him

Engine is complete. We are waiting for our custom fuel system to arrive and hope to make some noise by the end of the week.

Stay tuned.

rattt g

the c5r timing chain is it a single or double roller?

1.8t

^ Single.

Nice build Ron!

sublime1996525

I love following along on builds like this. Even though it gives me very expensive ideas.

OnPoint

Potent engine build there.

Just curious - and perhaps a noob question - but what do the lifter link bars do (i.e. what are advantages of those).

1.8t

The link bars keep the lifters from rotating in their respective bores. They cannot wear out like the stock lifter trays, which can lead to a turned lifter and essentially a ruined engine. The other benefit is an improvement in oil drain back from the head since the trays can be removed all together.

rattt g

i do not see gas ports on the pistons

OldDominion

Look at the land that is right below the ring lands, right where it goes into the skirt. Those are the gas ports i believe they are talking about

turbo raptor

those holes in the side of the piston are not gas ported?

btw stop quoting pictures

rattt g

nope, gas ports are on top of the piston, or lateral above the top ring

rattt g

no gas porting is above the top ring, so the cylinder pressure
makes it's way in back of the top ring to expand it

turbo raptor

now that i look closer i dont see the holes on the top of the piston. what are those holes anyway? someway for the oil to get on the rings

Vito.A

Those are oil drain back holes.

Ron,
Did you have my original post deleted?

08jetvette

Can I get a price on a short block like that. Trying to figure out what I'm going to do for October. TIA!