Precision Race Components – SEE Why We Build Superior Cylinder Heads! - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Lonnie@Texas-Speed · 12-13-2012, 05:53 PM

As cylinder head customers, you have a lot of choices in what you can purchase. There are a lot of different options to choose from, and when you research various companies and options online, you try to get a feel for who you can trust. While our company does have a strong online presence, we want all of our current and potential customers to have more than a good feeling about where their products come from. We want everyone to SEE where they come from! There is a lot that goes into our cylinder head production, not just in designing the castings but all the way to the finished product that you receive. We have been machining and building LS-based cylinder heads since 2004, and we have countless hours in research and development to bring our products to our customers. We ONLY specialize in LS-based cylinder heads! We do not divide our time between multiple platforms. All of our time and money is spent on building the best LS-based cylinder heads available! While you can read a lot on how well a company’s product performs, you do not always get the chance to see what type of operation is in place to produce YOUR cylinder heads. We are going to take you through a tour of our cylinder head production, the operation, what goes into our products, and why we do it so you can fully understand why Precision Race Components is the correct choice for your cylinder heads!

Our machining center houses all of our machines for our cylinder head and engine programs. This center is 5,000 sq. ft. of our 25,000 sq. ft. facility, and all of our CNC cylinder heads are machined on Haas 5-axis CNC machines. We have two HS1’s and one ES5. Each machine is dedicated to a specific line of cylinder heads: one for cathedral-port aftermarket castings, one for LS3 and LS7 aftermarket castings, and one for GM castings. We strive to have the vast majority of the most popular cylinder heads in stock! Anything that is not in stock can typically be built within two to three business days.

All of our cylinder heads are valve jobbed on our Newen single-point CNC seat and guide machines. We use two of these machines, one for intake and one for exhaust. This allows us to streamline the production of our cylinder heads, which helps not only with time but precision as well. We also use the Newen machines to ream the guides for all of our aftermarket castings. Many other machine shops will use a drill in a parts washer to ream the guides, which can prove to be very inaccurate. All of our machining process uses the best machines available to build the best product available. We hold tolerances to less than .0001”!

All of our valve jobs are custom-drawn for our cylinder heads specifically, and the Newen machines complete the valve job with precision. We use a 5-angle valve job on our cylinder heads, and valve jobs that could take an hour or more to cut on older, traditional machines can take as little as 90 seconds on our machines! We have $200,000 invested in our two seat and guide machines alone! This is a perfect example of how we go above and beyond to build the absolute best product on the market! Each machine will also check the run-out on the seat to confirm that the valve job was performed correctly and the machined surface of the seat is 100% round.

Every set of cylinder heads gets pressure-checked before leaving our facility. What this does is pull vacuum through the port to verify that the valves completely seal when closed. Every port of every set of cylinder heads is checked with the valve in place but without a spring kit installed. The pressure of the valve spring will force most valves to seal against the seat, but the key is to make sure it seals without the help of the valve springs. The precision accuracy of the valve job is vital to valves that seal properly, and it is also crucial to air flow. You can lose 20 CFM or more if the valve job is not done properly!

We use a Haas VF3 3-axis CNC machine for nothing but cylinder head milling. Every set of cylinder heads is milled to ensure a 100% straight and level deck surface. This provides you with a quality seal against the head gasket. Every set of heads is machined to match the customer’s setup! We mill each set of cylinder heads for a specific size camshaft. So, if you are running a 224/224 cam, you will receive more milling than if you were to run our MS4 (239/242) cam. We stock all of our cylinder heads with various mill numbers, so we will most likely have multiple sets of heads in stock that will match your setup! We know the exact piston-to-valve clearance with all of our camshafts, so this allows us to provide our customers with maximum compression given the constraints of their p-to-v clearance. We also do NOT charge for the additional milling! Whether we are performing a .003” clean-up mill or cutting the surface .030”, you will not pay any additional money. We want every set of cylinder heads to be perfect for your setup, so you will always achieve maximum power results. We will not leave any power on the table!

For the PRC dual valve spring kits, all seat bases and titanium retainers are machined on a Haas CNC lathe. We do not use outsourced or overseas parts, which allows us to set both our .650” and EHT .675” valve spring kit up with an install height of 1.810”. We do see a little variance in the installed height when using factory GM valves, but any of our cylinder heads with stainless steel valves will have very minimal variance, if any at all. The valve springs that we use for both our .650” and EHT .675” are NOT the same, old “gold” valve springs that you find with other vendors. The old “gold” valve spring is a weaker design with less closed and open pressures, and they have proven to lose their installed height with as little as 15,000 miles! The PRC valve springs are ONLY used by us, and they were specifically designed for us. Our valve springs were spintron tested against other major valve spring suppliers in the LSx market, and the PRC springs not only retained their closed and open pressures for more cycles than any other valve spring but they also did not lose ANY of their installed height! As with ALL components of the Precision Race Components product line, every piece in our valve spring kits are built in the USA!

Throughout each production run, we randomly pull cylinder heads to not only verify the quality control processes that were in place to that point but to also verify that the cylinder heads flow exactly what they are advertised to flow! It is VERY important to understand that there is a correct and incorrect way to flow cylinder heads. You must have the correct bore plate, you must use a consistent unit of measurement (we measure flow at 28.0” of water), and you MUST have a radiused inlet on the intake ports! We use a Superflow SF-600 flow bench for all of our air flow testing, and we use clay to create a radiused inlet. The radiused inlet is so important when testing intake ports because the sharp edge of the port will create a disturbance and show much lower flow numbers. You have to remember that when the engine is running, the intake manifold is against the intake port and the lip of the cylinder head is not a factor at that point.

All PRC cylinder heads are designed to be the best possible right out of the box. Our cylinder heads do NOT require any additional hand porting or reworking for better flow! Any cylinder heads that require additional work out of the box are not providing you with the best performance possible! The CNC marks in the intake and exhaust runners do NOT need to be smoothed out. What looks good to the eye does not always equate to better performance and power! We have actually tested this theory many times on multiple cylinder heads of ours, and each time nets zero gains. If a set of cylinder heads need additional work out of the box, the company did not do their job on properly designing or digitizing the cylinder heads.

We have multiple quality control checks in place throughout the machining and assembly process to ensure that every set of cylinder heads is completed with precision accuracy for maximum performance and durability. From start to finish, we use nothing but the best equipment and staff to provide you with the best products available. You will not find another company that is more dedicated to building your LSx cylinder heads! We house over $500,000 of CNC machines that are dedicated to building the Precision Race Components cylinder heads. Don’t rely on only an “online presence” to decide who will build your cylinder heads. You can determine a company’s overall success rate and customer service by reading online, but it will never provide you with the full picture. How clean is their facility? What quality control processes are in place? Where do they source their products from? You need to KNOW that your cylinder heads are built using the best parts, machines, and processes available today. You should research very carefully and ask where and how your cylinder heads are machined and assembled! We are very proud of our product offerings, and we are very thankful to all of our customers for allowing us to succeed. As we continue to grow, we will not sacrifice power, accuracy, or durability. When you purchase Precision Race Components products, you purchase the BEST on the market!

LS3 SS · 12-13-2012, 06:48 PM

Wow, that's pretty awesome! Looks like I know who I will be doing business with in the future!

camaro actual · 12-13-2012, 08:41 PM

wish the facility was closer to san antonio so I could go check it out 1st hand.... if thats allowed

IOM Black Diamond · 12-13-2012, 09:24 PM

DCC1464 · 12-13-2012, 09:41 PM

one hell of a sales pitch! i wasnt even thinking about heads but now i know who im gona buy them from

bada450r · 12-13-2012, 10:02 PM

thats pretty awesome, thanks for taking the time to show off what you guys can do.....great info

SPCBA · 12-13-2012, 10:03 PM

Such a nice workshop! This type of post is by far the best on the site.

thahemp · 12-13-2012, 10:46 PM

Wow. That is much more established than I thought you guys were for whatever reason. We're an electronics manufacturing company that looks about like half that with pick-and-place machines instead of CNC. Very nicely done.

Silver-SS · 12-13-2012, 11:42 PM

I want heads now lol

SC2150 · 12-14-2012, 08:30 AM

That makes me drool......any time a group of CNC machines are in one place like that I'm like a kid in a candy store!

Lonnie@Texas-Speed · 12-14-2012, 09:27 AM

Quote:

Originally Posted by camaro actual

wish the facility was closer to san antonio so I could go check it out 1st hand.... if thats allowed

If you're ever in the area, swing in! We enjoy giving tours!

IOM Black Diamond · 12-14-2012, 11:46 AM

After reading this it makes me want new heads now

They would going really good with the came and headers I am getting ready to order

fldrummer · 12-14-2012, 11:46 AM

Sold!

kaler · 12-14-2012, 10:17 PM

There are a lot of big name LS engine builders out there to chose from but very few have access too a world class machine shop of this caliber. A engine builder is only as good as the machine work.

12-13-2012, 05:53 PM	#1
Lonnie@Texas-Speed Drives: 2010 Camaro - BIW Join Date: Mar 2010 Location: TEXAS! Posts: 198	Precision Race Components – SEE Why We Build Superior Cylinder Heads! As cylinder head customers, you have a lot of choices in what you can purchase. There are a lot of different options to choose from, and when you research various companies and options online, you try to get a feel for who you can trust. While our company does have a strong online presence, we want all of our current and potential customers to have more than a good feeling about where their products come from. We want everyone to SEE where they come from! There is a lot that goes into our cylinder head production, not just in designing the castings but all the way to the finished product that you receive. We have been machining and building LS-based cylinder heads since 2004, and we have countless hours in research and development to bring our products to our customers. We ONLY specialize in LS-based cylinder heads! We do not divide our time between multiple platforms. All of our time and money is spent on building the best LS-based cylinder heads available! While you can read a lot on how well a company’s product performs, you do not always get the chance to see what type of operation is in place to produce YOUR cylinder heads. We are going to take you through a tour of our cylinder head production, the operation, what goes into our products, and why we do it so you can fully understand why Precision Race Components is the correct choice for your cylinder heads! Our machining center houses all of our machines for our cylinder head and engine programs. This center is 5,000 sq. ft. of our 25,000 sq. ft. facility, and all of our CNC cylinder heads are machined on Haas 5-axis CNC machines. We have two HS1’s and one ES5. Each machine is dedicated to a specific line of cylinder heads: one for cathedral-port aftermarket castings, one for LS3 and LS7 aftermarket castings, and one for GM castings. We strive to have the vast majority of the most popular cylinder heads in stock! Anything that is not in stock can typically be built within two to three business days. All of our cylinder heads are valve jobbed on our Newen single-point CNC seat and guide machines. We use two of these machines, one for intake and one for exhaust. This allows us to streamline the production of our cylinder heads, which helps not only with time but precision as well. We also use the Newen machines to ream the guides for all of our aftermarket castings. Many other machine shops will use a drill in a parts washer to ream the guides, which can prove to be very inaccurate. All of our machining process uses the best machines available to build the best product available. We hold tolerances to less than .0001”! All of our valve jobs are custom-drawn for our cylinder heads specifically, and the Newen machines complete the valve job with precision. We use a 5-angle valve job on our cylinder heads, and valve jobs that could take an hour or more to cut on older, traditional machines can take as little as 90 seconds on our machines! We have $200,000 invested in our two seat and guide machines alone! This is a perfect example of how we go above and beyond to build the absolute best product on the market! Each machine will also check the run-out on the seat to confirm that the valve job was performed correctly and the machined surface of the seat is 100% round. Every set of cylinder heads gets pressure-checked before leaving our facility. What this does is pull vacuum through the port to verify that the valves completely seal when closed. Every port of every set of cylinder heads is checked with the valve in place but without a spring kit installed. The pressure of the valve spring will force most valves to seal against the seat, but the key is to make sure it seals without the help of the valve springs. The precision accuracy of the valve job is vital to valves that seal properly, and it is also crucial to air flow. You can lose 20 CFM or more if the valve job is not done properly! We use a Haas VF3 3-axis CNC machine for nothing but cylinder head milling. Every set of cylinder heads is milled to ensure a 100% straight and level deck surface. This provides you with a quality seal against the head gasket. Every set of heads is machined to match the customer’s setup! We mill each set of cylinder heads for a specific size camshaft. So, if you are running a 224/224 cam, you will receive more milling than if you were to run our MS4 (239/242) cam. We stock all of our cylinder heads with various mill numbers, so we will most likely have multiple sets of heads in stock that will match your setup! We know the exact piston-to-valve clearance with all of our camshafts, so this allows us to provide our customers with maximum compression given the constraints of their p-to-v clearance. We also do NOT charge for the additional milling! Whether we are performing a .003” clean-up mill or cutting the surface .030”, you will not pay any additional money. We want every set of cylinder heads to be perfect for your setup, so you will always achieve maximum power results. We will not leave any power on the table! For the PRC dual valve spring kits, all seat bases and titanium retainers are machined on a Haas CNC lathe. We do not use outsourced or overseas parts, which allows us to set both our .650” and EHT .675” valve spring kit up with an install height of 1.810”. We do see a little variance in the installed height when using factory GM valves, but any of our cylinder heads with stainless steel valves will have very minimal variance, if any at all. The valve springs that we use for both our .650” and EHT .675” are NOT the same, old “gold” valve springs that you find with other vendors. The old “gold” valve spring is a weaker design with less closed and open pressures, and they have proven to lose their installed height with as little as 15,000 miles! The PRC valve springs are ONLY used by us, and they were specifically designed for us. Our valve springs were spintron tested against other major valve spring suppliers in the LSx market, and the PRC springs not only retained their closed and open pressures for more cycles than any other valve spring but they also did not lose ANY of their installed height! As with ALL components of the Precision Race Components product line, every piece in our valve spring kits are built in the USA! Throughout each production run, we randomly pull cylinder heads to not only verify the quality control processes that were in place to that point but to also verify that the cylinder heads flow exactly what they are advertised to flow! It is VERY important to understand that there is a correct and incorrect way to flow cylinder heads. You must have the correct bore plate, you must use a consistent unit of measurement (we measure flow at 28.0” of water), and you MUST have a radiused inlet on the intake ports! We use a Superflow SF-600 flow bench for all of our air flow testing, and we use clay to create a radiused inlet. The radiused inlet is so important when testing intake ports because the sharp edge of the port will create a disturbance and show much lower flow numbers. You have to remember that when the engine is running, the intake manifold is against the intake port and the lip of the cylinder head is not a factor at that point. All PRC cylinder heads are designed to be the best possible right out of the box. Our cylinder heads do NOT require any additional hand porting or reworking for better flow! Any cylinder heads that require additional work out of the box are not providing you with the best performance possible! The CNC marks in the intake and exhaust runners do NOT need to be smoothed out. What looks good to the eye does not always equate to better performance and power! We have actually tested this theory many times on multiple cylinder heads of ours, and each time nets zero gains. If a set of cylinder heads need additional work out of the box, the company did not do their job on properly designing or digitizing the cylinder heads. We have multiple quality control checks in place throughout the machining and assembly process to ensure that every set of cylinder heads is completed with precision accuracy for maximum performance and durability. From start to finish, we use nothing but the best equipment and staff to provide you with the best products available. You will not find another company that is more dedicated to building your LSx cylinder heads! We house over $500,000 of CNC machines that are dedicated to building the Precision Race Components cylinder heads. Don’t rely on only an “online presence” to decide who will build your cylinder heads. You can determine a company’s overall success rate and customer service by reading online, but it will never provide you with the full picture. How clean is their facility? What quality control processes are in place? Where do they source their products from? You need to KNOW that your cylinder heads are built using the best parts, machines, and processes available today. You should research very carefully and ask where and how your cylinder heads are machined and assembled! We are very proud of our product offerings, and we are very thankful to all of our customers for allowing us to succeed. As we continue to grow, we will not sacrifice power, accuracy, or durability. When you purchase Precision Race Components products, you purchase the BEST on the market!

12-13-2012, 09:24 PM	#4
IOM Black Diamond HT5 COTW 1/21/13 Drives: 2010 Camaro Inferno 2SS RS 6M Join Date: Apr 2011 Location: Pleasant Hill, Or Posts: 2,486	__________________

12-13-2012, 09:41 PM	#5
DCC1464 COTW 5/27/13 Drives: '11 S/C SS/RS CGM Join Date: Dec 2010 Location: Phoenix, AZ Posts: 755 View My Garage	one hell of a sales pitch! i wasnt even thinking about heads but now i know who im gona buy them from __________________ 622RWHP/512FTLBS on 91 octane 2.9l Whipple 4" pulley. Vengance VRSP3 cam. Lots of BMR & AAC. Body work by Gary's Customz. Nic D tuned My build thread

12-13-2012, 10:02 PM	#6
bada450r Drives: 2011 2ss blk on blk convertible Join Date: Aug 2012 Location: so-cal Posts: 135	thats pretty awesome, thanks for taking the time to show off what you guys can do.....great info __________________ 2011 2ss black on black, v3 blown hauling ass and burning gas.

12-13-2012, 10:46 PM	#8
thahemp Geek Drives: 2012 Black LS3 Join Date: Jan 2012 Location: Derby, KS Posts: 4,343 View My Garage	Wow. That is much more established than I thought you guys were for whatever reason. We're an electronics manufacturing company that looks about like half that with pick-and-place machines instead of CNC. Very nicely done. __________________ 01000111011011110110111101100100001000000110110001 11010101100011011010110010000001110111011010010111 01000110100000100000011101000110100001101001011100 110010000001101111011011100110010100100001 x = ac97968bd3df8f968c8cd3df998a9c94d3df9c8a918bd3df9c 909c94df8c8a9c949a8dd3df92908b979a8ddf998a9c949a8d d3df8b968b8cd1 x = ~x

12-13-2012, 06:48 PM	#2
LS3 SS Drives: 2010 Cyber Grey Camaro SS (LS3) Join Date: Mar 2010 Location: Clarksville TN Posts: 2,275	Wow, that's pretty awesome! Looks like I know who I will be doing business with in the future!

12-13-2012, 08:41 PM	#3
camaro actual Drives: 2010 Camaro 2SS/RS L99 Join Date: Sep 2012 Location: san antonio TX Posts: 154	wish the facility was closer to san antonio so I could go check it out 1st hand.... if thats allowed

12-13-2012, 10:03 PM	#7
SPCBA Drives: pleather and Chiclets Join Date: Mar 2012 Location: a line somwhere Posts: 4,206 View My Garage	Such a nice workshop! This type of post is by far the best on the site.

12-13-2012, 11:42 PM	#9
Silver-SS Drives: 2012 2SS RS Join Date: May 2012 Location: Orlando Posts: 235	I want heads now lol

12-14-2012, 08:30 AM	#10
SC2150 Account Suspended Drives: 2012 Camaro RS, RX supercharged Join Date: Dec 2009 Location: Bradenton, FL Posts: 6,063	That makes me drool......any time a group of CNC machines are in one place like that I'm like a kid in a candy store!

12-14-2012, 11:46 AM	#12
IOM Black Diamond HT5 COTW 1/21/13 Drives: 2010 Camaro Inferno 2SS RS 6M Join Date: Apr 2011 Location: Pleasant Hill, Or Posts: 2,486	After reading this it makes me want new heads now They would going really good with the came and headers I am getting ready to order __________________

12-14-2012, 11:46 AM	#13
fldrummer "Black Ace" Drives: Supercharged 2010 SS, 2016 Golf R Join Date: Aug 2008 Location: Ft. Lauderdale, FL Posts: 1,352	Sold! __________________ 2010 2SS/RS M6 "Black Ace" - Delivered 6/4/2009 Mods: Forged 416 LS3, Maggie TVS 2300 SC (~11 psi), custom cam (232/247, .630/.630, 118 LSA), 90-lb. injectors, ZL1 fuel pump & ADM controller, Alky Control meth kit, Monster LT1-SC twin-disk clutch, ZL1 drivetrain conversion w/ DSS 1000-HP axles & 1-pc. driveshaft, CAI Inc. intake w/ ADM scoop, XS Power full exhaust (1 7/8" LT headers with 3" off-road pipes), VMAX CNC-ported TB, LSR adjustable sway bars, LPE rear end-links, BMR 1" drop, BMR polyurethane bushings; UMI trailing arms & toe rods. Built & tuned by Kraftworks. 755 rwhp/708 rwtq

12-14-2012, 10:17 PM	#14
kaler Drives: 2011 Dodge 3500 dually Mega Cab Join Date: Jul 2009 Location: discovery bay,ca Posts: 667	There are a lot of big name LS engine builders out there to chose from but very few have access too a world class machine shop of this caliber. A engine builder is only as good as the machine work. __________________ 2010 SS a6 with TSP VVT-3 cam,PRC ported heads,Yank 3200,Kooks and CAI inc. = +121 RWHP 1/4 mile 12.1 E.T. On P-Zero Tires.