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LT1 Heads/Cam Packages 100% CNC'd 185cc Street/Strip LT1 Cylinder Head Package: With our extremely efficient ports this is enough head to propel a well setup daily driver into the 11's on a budget! Easily equal to or better than any competing "Stage II" or "Fully Ported" LT1 head (most of which are 20-30cc larger at the same or less flow rate!), this offering represents great value & performance. Whether it's a hot strip only car, or powerful daily sleeper, the Street/Strip LT1 head will deliver. This package includes the same high quality components & the exact same track proven CNC performance valve job as our other CNC'd GM LT1 packages. With a daily drivable hydraulic roller cam, these heads will typically make 445-475 SAE corrected FWHP, and have the potential to make up to approximately 525FWHP naturally aspirated with more aggressive cams & valve train packages.
Note - Exhaust numbers are obtained without the use of a "pipe" or extension of any kind.
Recommended Usage: Stock 350cid - 383cid short-blocks with piston relief/dish volumes of 5-16cc. Finished chamber size after milling is 52-56cc depending upon application. With supporting modifications, manual stock short-block F and Y-bodies can typically produce 375-405rwhp SAE corrected or 395-425rwhp STD corrected depending on cam and valvetrain selection. More importantly, full weight stock shortblock f-bodies can typically run low 12's to high 11's on drag radials at 114-118mph with this head.$1795 + Core* - Complete, Assembled, with camshaft & Ready to Bolt-On **Scroll down for Optional Upgrades and complete valvetrain packages!** 100% CNC'd 190cc StreetPro LT1 Cylinder Head Package: NOTE: Our 190cc CNC'd LT1 cylinder head has been superceded by it's latest revision listed below at 200cc. A moderate 5cc's were added to the runner to improve both cleanup and capacity. The remaining 5cc's is due to gasket matching the inlet. The word to describe this offering is Versatility. With a mild turbo 355 our FullPort head has made over 1000rwhp SAE & subsequently went 9.70's @ 157mph in a 3700lb daily driver (122mph 1/8th!). If going fast naturally aspirated is your thing, we've covered that too. This package has gone 10.20@135mph in a 3400lb F-Body with a 383, mild .620/.600" lift camshaft, bolt-on suspension, a stock reprogrammed PCM, and 3000ft+ Density Altitude! No other LT1 offering available can match the performance, longevity, or consistency this CNC head exhibits. The fact that our ports are machined on a simultaneous 5-axis mill with a repeatability of 40-millionth's of an inch ensures every customer receives our best work. Years of painstaking development have lead to this - the ultimate GM LT1 based cylinder head. With a focus on port efficiency, wet flow, and the type and intensity of motion we impart into the air, this head has eclipsed all notions of what's achievable with "just" a GM LT1 casting. Measuring just under 190cc, this intake port moves more air than most offerings 20cc larger! Paired with our highly developed chamber and 78cc exhaust port we see outrageous gains without the drivability and throttle response losses the larger LT1 offerings suffer from. Like our Street/Strip package this head also includes re-machined intake & exhaust flanges & valve cover rails to ensure your project comes together smoothly. With a daily drivable hydraulic roller, these heads will typically make 460-500 SAE corrected horsepower, and have the potential to make up to approximately 600hp naturally aspirated with more aggressive valvetrain packages.
100% CNC'd 200cc Competition LT1 Cylinder Head Package: This is our newest, and most powerful LT1 offering to date. Delivering performance that surpasses even our 190cc Street/Strip head, this offering is the final word in LT1 performance. Not only has this head powered Rick Abare's 650hp 383LT1 into the 9's at over 138mph in a 3440-3470lb Trans-Am, it's abused the rollers with over 480rwhp from a NA 355 LT1. For the ultimate street or race oriented LT1 powerplant, nothing else is even close. Our finest LT1 cylinder head includes custom components made to our exacting specifications from our specified materials. Additionally we automatically upgrade the 26918 spring to it's big brother the Pacalloy 26120 from the inventors of the "beehive" 918's. This, the ultimate hydraulic roller spring, will handle the latest roller lobes without spring fatigue or failure for many thousands of miles. In addition to what's listed below, we also offer several more race-oriented component configurations utilizing the latest in solid roller technology. Please give us a call for more information.
Note - Exhaust numbers are obtained without the use of a "pipe" or extension of any kind.
Recommended Usage: Stock 350cid - 396cid short-blocks with piston relief/dish volumes of 5-16cc. Finished chamber size after milling is 52-56cc depending upon application. With supporting modifications, manual stock short-block F and Y-bodies can produce 395-435rwhp SAE corrected or 415-455rwhp STD corrected. For 440-475rwhp SAE pair this head with one of our ported intakes and a valvetrain upgrade. Whether it's a 400rwhp street sleeper, a brutal 10-second NA street car, or an outrageous 1200hp+ turbo engine this head is guaranteed to deliver!$1975 + Core* - Complete, Assembled, with camshaft & Ready to Bolt-On **Scroll down for Optional Upgrades and complete valvetrain packages!** LT1 Intake Manifold Porting If you're going all out with your LT1 setup, the Intake Manifold deserves some attention. Much like our cylinder head packages, this isn't something where a "one size fits all" product is optimal. Because of this, we have several different levels of intake porting - from mild to wild. Just like our heads, all LT1 intakes are fully washed, bead blasted, and deburred so that they return looking better than new! NOTE: To perfectly blend the TB opening to aftermarket TB bores we require either your TB, a gasket/template, or you may scribe around the insides of the bores yourself. Otherwise we enlarge to a standard 59.5-60mm dia gasket that fits most 58mm TB's. Prior to shipping your manifold to us, please remove the hardware attached to it. This includes the oil shield, fueling, and TB hardware. Barb fittings for vacuum lines may be left in.
Pricing: Cleaning & Inlet Porting - $175 - This offering is applicable to most engines with power goals below approximately 500hp at the flywheel. After cleaning, the physical modifications will be focused in the Throttle Body/Inlet areas of the manifold to enable the use of 58mm or mono-blade aftermarket throttlebodies. Street/Strip Ported Intake - $375 - This is the same manifold Rick Abare has run 9.9X's @ 138mph with in a 3470lb car making 520rwhp SAE through an automatic and a 9" Ford rear end. It will easily support 550 flywheel HP and up to 650FwHP in more aggressive applications. With massaged runners, enlarged Throttle Body bores and internal inlet contouring this is our best LT1 intake value. Street/Strip Ported Intake w/ Corrected Geometry - $425 - This is the exact manifold listed above with more machinework. The ONLY way to make the ports of your intake manifold align with the ports of your head is via machinework, NOT "gasket matching." To save our stock short-block customers money our 185cc & 200cc CNC'd LT1's include machining of the head that corrects the typical mismatch produced by milling the head deck and going to a thinner gasket. However, for extreme applications or any application where the deck height of the block is altered, the flanges and end rails of the intake manifold must be machined to ensure proper fitment and port alignment. We will mock your exact heads up on one of our test blocks to duplicate your exact deck height, head gasket, and intake gasket combination and machine the intake manifold to correct the geometry of the flanges. You may be able to bolt your manifold on by elongating bolt holes, but that will not correct the port alignment or make it seal! Race Porting - $Per-App - In addition to the work performed in our packages above, manifolds are stripped and have material strategically added to increase the limits of the production casting or to mate them to heads other than GM LTx castings. The opposite situation is also possible where we convert Gen1 SBC manifolds to work with our LTx cylinder heads offerings. As this is a custom "one-off" oriented item, please inquire for a specific price quote. Other Options...
Bronze Guide Liners - With some older used castings the valve guides will have been worn to the point that the valve stem to guide clearance exceeds optimal, and sometimes safe limits. This can not only cause an inordinate amount of oil consumption, but premature wear of related components, and poor valvetrain dynamics. To alleviate this, we can install genuine K-Line Full Bronze liners, and hone them to within .0001" of our desired clearances. These liners essentially offer all of the benefits of a full bronze guide, while keeping the parts and machinework cost at a minimum. With properly honed guides you'll be set for years of reliable, consistent performance. Upgrade Cost - $125 Valve Spring & Retainer Upgrades - For those looking to get the most performance out of our LT1 offerings we have several available valve spring upgrades to handle any of the latest and greatest Hydraulic and Solid Roller lobes out there. For competition engines that absolutely must perform consistently without fail there is no better option than a true Race Quality PSI Endurance Series spring with Xceldyne's Titanium locks and retainers. Not only is the design, attention to detail, and tolerancing superior to the average part, they also utilize a higher grade of Titanium. Where most Ti components are Ti6AL4V, race quality Ti components are produced from Ti-17 (Ti-5Al-2Sn-2Zr-4Mo-4Cr). These top-shelf options are also a great upgrade for the discerning enthusiast demanding the utmost in performance & long-term reliability. Here are a few of our most popular upgrades: CompCams "120" Beehive Springs - Upgrade Cost - $50 CompCams "943" Pacalloy Spring w/ Xceldyne Ti-17 Locks & Retainers - Upgrade Cost - $695 PSI 1200 Series Endurance Spring w/ Xceldyne Ti-17 Locks & Retainers - Upgrade Cost - $795 Below are a few pictures to illustrate the extreme attention to detail inherent in true High-End Race Quality Components from Xceldyne vs. the average parts most offer. While both are functional, the Xceldyne part's vastly superior Ti-17 material, design & precision machinework will deliver superior performance, reliability, and longevity. All components pictured are new.
Valvetrain Packages... Competition Cams Camshafts - Comp produces many proven shelf grinds at a reasonable price. If you already have a specific grind in mind (i.e. "CC305" etc.) then we will be more than happy to provide it. Any Lobes - Cost is $250Ai Proprietary System Matched Billet Core Camshafts - Unlike many "custom" grinds these aren't simply masked shelf cams - they typically utilize our proprietary specs and are ground by one of several camshaft manufacturers depending on their particular specialty. Custom Ai Grinds - $395Ai System Matched Valvetrain Kits - In addition to complete cylinder heads and a camshaft, one will typically need to upgrade related valvetrain components to maintain reliability and ensure performance. Here are several packages including the components most will acquire for a top-end upgrade. Additionally, when purchasing parts to accompany our heads through Ai, we can not only offer a savings, but ensure that the customer receives the correct components for their particular application. Please keep in mind that only our most popular packages are listed on our site. Ai High-Performance Hydraulic Roller Kit: Ai Pro-Series Solid Roller Kit: * Core charge is $600 & fully refundable upon receipt of a core that passes our thorough inspection. We recommend you supply your own cores if at all possible. All heads sent in will be thoroughly inspected as well as hardness tested. © 2006 Advanced Induction |
