The engine pulled cleanly all the way to 7,000 rpm, where it was still producing 550 hp. Affirm sometimes requires additional information to consider a credit application. To further improve rpm capability, the heads also featured titanium retainers and hollow-stem LS3 intake valves. This is a discussion on cam install cost? 2020 Corvette and how it stacks up with other world class cars. Original Shows, Motorsports and Live Events, Due to the EU’s Global Data Protection Regulation, our website is currently unavailable to visitors from most European countries. So, I was at $7,000 in parts, and the install and other expenses is about $5,300. If they prompt you for this information but you are unable to provide it, Affirm will be unable to approve your credit application. An application from a returning customer may be denied, however, if that customer has failed to repay other Affirm loans on time or if the customer shows excessive borrowing behavior. The 8710 cam has 230 degrees of intake duration and 242 degrees of exhaust duration at 0.050 tappet lift. We will message you back as soon as we have the first free moment! Buy with Affirm is not currently available to West Virginia residents. Save Share. Affirm has a dedicated team in San Francisco at Affirm HQ, ready to answer your questions and help out however they can. The larger chambers drop the compression ratio by 1.3 points, bringing it down to a more boost-friendly 9.4:1. That puts the total at $12,300 for the parts and labor on a turn-key LS swap. within the Internal Engine forums, part of the LSx Technical Help Section category; how much does an average cam install cost? Torque production from the 6.2L exceeded 450 lb-ft from 4,100 rpm to 5,600 rpm.
1 - 11 of 11 Posts. ProComp also offers LS3 heads in standard chamber sizes for the NA crowd, and Dr. J's can tune them for big-time power production. Before we could begin, our GMPP LS3 crate motor needed to have a few items replaced to prepare it for dyno use. ARP - Day Four Build Recap, Week To Wicked: Two Days Left To Build our 1955 Chevy! Camaros with an automatic transmission were equipped with the L99, not the LS3, and have both VVT and AFM, so check your engine source or remove the timing chain cover to verify. Unlike a credit card, Affirm is not a revolving line of credit. They accept payment by debit card, bank transfer and check. Here is the place to ask! The Level 2 cam kit comes with dual-valve springs with seals, retainers, keepers, and gaskets. Despite dropping the compression ratio from 10.7:1 to 9.4:1, the ported ProComp heads and Texas Speed cam improved the output of the LS3 crate motor from 485 hp and 476 lb-ft of torque to 538 hp and 495 lb-ft. Knowing that every point of compression drops power output by 4 percent, we can calculate that with the stock chamber size, these heads would produce in the neighborhood of 565-570 hp.
Horsepower increased from 484 at 6,100 to 549 at 6,600. Be 18 years or older (19 years or older in Alabama or if you’re a ward of the state in Nebraska). What makes them so attractive for forced-induction applications is that they're available with combustion chambers measuring 80-81 cc's, compared with just 68-70 cc's for the production LS3/L92 heads. Related: How to Install Performance Valve Springs. 6/14 So equipped, the GMPP LS3 produced 485 hp at 5,900 rpm and 476 lb-ft of torque at 4,600 rpm. 10 Replies 6 Participants Last post: Zorro Dec 13, 2005. Replacing the factory LS3 cam with the custom Comp grind from Texas Speed also required replacing the timing (cam) gear. cam install cost? Custom Performance Racing (CPR).
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We took a set of large-chamber L92 heads from ProComp and had Dr. J's "tune them up" so we could run them on our LS3 (see graph). Ultimate 1957 Corvette Roadster … Yes, Roadster! … A full test of the standard-chamber heads will be completed soon, but for now it's clear that these large-chamber offerings combine plenty of flow with a drop in compression that makes them ideal for forced induction. The cam is ground +3 degrees and has a 113-degree lobe separation angle. Using the stock 1.7:1 rocker-arm ratio, it has 0.625 inch of intake valve lift and 0.605 inch of exhaust valve lift. Yes, when you first create an Affirm account, Affirm perform a ‘soft’ credit check to help verify your identity and determine your eligibility for financing. I had a 6” lift installed, and I’m adding 35×12.5 tires. GPI – Cam Install Package (GM Low Lift LS Camshaft 4.8L / 5.3L / 6.0L) Rated 5.00 out of 5. Corvettes attending the 50th Annual NSRA Street Rod Nationals. Peak torque moved from 4,800 rpm to 5,400 rpm and gained 22 lb-ft for a total of 492 lb-ft with more than 400 lb-ft from 2,800. After installation of the LS9 cam and LS3 springs, the power output jumped to 402 hp at 6,200 rpm and 379 lb-ft of torque at 4,900 rpm. We decided to see how much extra power could be unleashed by installing a rowdy high-performance replacement stick from Texas Speed & Performance (0.641/0.615-inch lift, 231/236-degree duration, 111-degree LSA). With a little more cylinder head and intake flow, it would have continued to make power past 7,000. LS3: 420kw (engine) 340kw (wheels) $5995 inc. GST (without bimodal) $6395 inc. … They gave us the SUM-8710. Not bad for a weekend's work. The exception is the 2010—2013 Corvette Grand Sport. Stock LS3 Cam Specs: 204/211 duration, 0.551/0.525 lift, 117 lobe separation angle, 1.7:1 rocker arm ratio, Summit Stage 3 Cam Specs: 230/242 duration, 0.625/0.605 lift, 113 lobe separation angle, 1.7:1 rocker arm ratio, Comp Cams Valve Spring Compressor Tool (PN 5462), Double Platinum LS Dual Valve Spring and Retainer Kit (PN TFS-2500286P), Spring Shims (0.030 x 0.520, 0.060 x 0.520, 1.300 OD, 0.520 ID), Stage Three LS Cam with Level 2 Cam Kit (PN SUM-8710-2-DLSTL). Summit Racing As important as the huge jump in peak power (from 485 to 574 hp) is the significant improvement in torque production (from 476 to 520 lb-ft) throughout the rev range. Reply. Corvette Exterior Design Manager shares insights about the C8 Development. We take you through the short but careful process of installing an aftermarket passenger sideview mirror on a C3 Corvette. This ‘soft’ credit check will not affect your credit score. Continue with Facebook. After the head and cam swaps, everything was buttoned back up, and the motor was once again ready to run. In addition to the porting, the TEA heads featured a 2.165/1.590 valve package. GMPP LS3 vs. TSP Cam and Dr. J's 81cc ProComp Heads The head swap required the removal of the factory coil packs, valve covers, and rockers, while the damper, front cover, and timing chain were all that stood in the way of accessing the cam. The phone account must be registered in your name. Provide a valid U.S. or APO/FPO/DPO home address. 3 Installed on the stock LS3 heads, the Brian Tooley spring upgrade allowed us to rev the motor safely past 6,500 rpm, even with the 235 cam approaching .650 lift. If you need a 50-states legal cam for your LS3, use part number 146-103-11. Week To Wicked: Did We Finish As Planned? We apologize for this inconvenience and encourage you to visit. We peeled back the timing chain cover to verify the camshaft was the stock one-bolt with no VVT. Because of its aggressive nature, this cam is recommended for manual-trans vehicles or automatics with a 2,500-rpm-stall torque converter. Sign Up today for our FREE Newsletter and get the latest articles and news delivered right to your inbox. We'd love to help. The cam is ground +3 degrees and has a 113-degree lobe separation angle. Ed Parker 2005 Z51 black/cashmere LG longtubes GHL exhaust Powered by Maggie Tuned By Vengeance Racing. Once we had the crankcase full of Lucas oil (conventional for the break-in procedure), the LS3 crate motor was up and running in no time. This unrealized potential is perhaps most evident in the cam timing, which is relatively mild (0.551/0.524-inch lift, 204/211-degree duration, 117-degree lobe-separation angle) given the cylinder heads' enormous flow potential. The stock LS3 is already near the top of the current crop of performance V-8s. or sign up with email About this Discussion. We noticed immediately that the engine revved easily to 7,000 rpm. CPR performed 10 pulls over two days, seeing repeatable results.