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.




This build has been complete for some time now, but I havent had the opportunity to upload the pics/videos to update the posts.

After break in we were able to produce 703RWHP/714RWTQ on 10psi!!!

1SwtRide

Awesome build - RHS ftw!

APSGTO

This would be a good candidate for that davis box also. 700rwtq at 2800rpms!!!

tjwong

I wasn't aware that Katech made a C5R chain for the RHS block because the RHS block has a raised cam location, or did RHS change that design in the block and the cam is now in the stock location? I do know that Cloyes makes the same C5R chain as supplied by Iwis for the RHS block that is one link longer than a standard LS chain. In any case nice build going on there. If I had known that Cloyes was going to supply the single roller chain for the RHS block for use of a LS7 dry sump oil pump, I would have waited to build my engine. I spent enough on my block to easily buy a RHS block. I had my block fitted with Darton sleeve, Katech did the CNC work to install their oil squirters and I also added billet caps as well, plus a mainline girdle to stabilize the mainline. I to am using a TVS2300.

0Ron@Vengeance Racing

Here is a link to the C5R Chain Katech offers.

http://store.katechengines.com/c5-r-...lock-p250.aspx

We have had excellent luck with their standard C5R chains so it was an easy choice to run their RHS version.

tjwong

That is great to know. Also FYI, the Katech chain is cheaper than the Cloyes IWIS C5R chain!

gunterwalker

Going to be a nice build. Good Luck.

Vito.A

Excellent selection of parts.

Looks like the crank took a lot of Mallory to balance.
Are the Oliver rods longer than stock?
Did you use the taper tool steel, or the straight tool steel pins? Did you coat the pins?
Have you previously had problems with the cam retainer plates coming loose?
Thanks for sharing.

SimpleC6

This is a great thread, and I wish there was more like it. Beautiful motor.

Neumonic2002

Awesome build Ron!!

MY10GS

Nicely done Ron

Steve@RSD

What's going on? Did you finish it? What did it Dyno?

hondaamer

Great tutorial. What's the price on something like this?

redls3

Same here please pm me a pruce for this setup

hucktyson

This is not a budget build by any means, but if your building a racing motor you should not have , compstar, eagle , or any other chinese bull$hit in the bottom end. In circle track motors making 550 at the crank, they are hand gernades with the pin pulled when running eagle and compstar stuff and guys on here and trying to run 1000 or 1200 hp through that bs ? This is one of the first builds ive seen on here where they actually used high end parts

08VRZ06

Any updates on the build???

Mark

JUIC3D

+1

Stockcar Axeman

Great thread. I love motor work/info and the pics are awesome! Can't wait to see the it as it comes along.

0Ron@Vengeance Racing

The car is currently up and running guys. We will have dyno/drivability videos as soon as we put a few miles on the combo!!!

Thanx for all of your interest and positive remarks on the build.

Also, if anyone is interested please email/PM and I will be more than happy to provide an itemized quote based on your goals/budget.

carpe dm

Beautiful...... I want one ma...