The LSX Bowtie Block from Eagle Chevrolet is an excellent choice for those looking to build a high-performance engine. Delivering professional racing-level strength and entry-level affordability, this durable iron-block casting is based primarily on GM’s production LS7 block, but designed with more material in key areas — including thicker deck and bores — to support displacements of 454 cubic inches or more. Related Articles - Isky Dual Valve Spring Set - Plazmaman Ford Coyote Billet Intake Manifold - Holley GM Gen-V LT Swap Oil Pan – Now Available in Black Finish
Unique six-bolts-per-cylinder-head-clamping capability enables forced-induction and nitrous combinations of greater than 2,000 horsepower. Because the LSX Bowtie block is based on production LS blocks, all of the LS-Series Gen IV cylinder heads, crankshafts, oil pans, camshafts, and accessories bolt right up to it. There is also a tall-deck version for building even larger engines. Chevrolet Performance delivers the LSX Bowtie Block semi-finished, allowing you to finish it to your needs. Whether you’re building a “tame” 800 horse bracket racer engine, or a 1,700 horsepower turbo engine for an Outlaw racer, the LSX Bowtie block is the foundation for a solid combination at an affordable price. Spherical roller bearing
LSX Bowtie Block specs and features include: • CNC-machined cast-iron block • True priority main oiling • 6-head bolts per cylinder • Standard 4.400″ bore spacing • Extra-thick siamese cylinder bores • Semi-finished, machined thicker decks • LS7-Style, 6-bolt dowel-located billet main bearing caps • Wet sump and dry sump oiling capability • Production-style deep-skirt head bolt holes • Production bolt hole and thread sizes • Maintains production exterior accessory mounting provisions • Front motor plate mounting holes added • Additional material cast around cam bearings for greater strength • 8mm exterior/interior fifth- and sixth-head bolt holes • Standard .842″ lifter bores • Accommodates all LS oil pumps and oil pans • External oil pump feed (rear of block) • Main web bay-to-bay breathing holes to support greater horsepower • Includes unique cam retainer, rear cover and lifter retainers
For the advanced LSX competition engine builder, you will fully enjoy the following features of the new LSX Bowtie Block: • Front oil feed holes can be plugged/restricted for mechanical flat tappet or mechanical roller lifter applications • Can be machined safely to 9.200″ deck height • Maximum 4.200″ bore at .145″ minimum wall thickness (naturally aspirated applications) • Head bolt holes can be machined for 1/2″ studs • Front oil feed lines can be plugged and external oil pump and/or aftermarket dry sump systems can be used via oil pump feed at rear of block — may be required with certain large stroke/aluminum rod combinations • Cam bores can be machined to accept 60mm roller bearings • Can be machined for larger diameter lifters and/or 1.060″ bronze bushings • Belt cam drive systems can be accommodated, some machining will be required • Front motor plate can be used for racing chassis applications (sprint car, drag racing, truck pulling, etc.) • Threaded water plugs can be used for external heaters or coolers • Extra stock for main bearing align-honed “ • 400 MPa tensile strength iron
For more information: https://www.chevrolet.com/performance-parts/components/engine/ls-lt-lsx-series-blocks/lsx-bowtie-blocks
This drop-in beehive spring for LS engines provides similar loads and lift capabilities of many 660 lift dual springs, while saving around 30 grams per valve.
PAC Racing Springs’ PAC-1276X is an LS drop-in beehive spring. It offers 150-lbs. @ 1.800, 417-lbs. @ 1.150, a 409 rate, and a max coil bind at 1.070. This drop-in beehive spring provides similar loads and lift capabilities of many 660 lift dual springs, while saving around 30 grams per valve.
The familiar blue powdercoated tester is made from quality cast-aluminum construction making it rugged enough for everyday use.
The kits, intended for budget build engines, come complete and ready to install with rings, pins and clips.
Erson custom-ground camshafts are ground on premium American made cores and feature superior straightness, profile accuracy, surface finish and base circle runout.
MAHLE Motorsport’s SBC Dish PowerPak pistons are available either in a 2618 alloy or 4032 alloy, the kit comes complete with a 1.0, 1.0, 2.0mm file fit performance ring set, pins, and clips.
According to owner Colin Jost, this 521 cubic inch blown big block Chevy engine doesn’t know it’s a Chevy since everything was built like a Hemi. Regardless, it’s 2,500 horsepower of awesomeness. Check it out!
For the two days we were at the 2022 Builder’s Brawl, we parked right next to a 1978 Camaro with a supercharged 521 cubic inch big block Chevy engine under the hood. Built by Colin Jost and Rick Wilson of Wildman Performance, the Chevy features a number of Hemi attributes. Check out the details in
We got to chat with Nick Bacalis of Bullet Racing Engines at the 2022 PRI show about his engine builds. He was kind enough to go a step further and showcase the high-performance engine and machine shop on Instagram Live to our audience. Check out this takeover featuring Nick and Bullet Racing Engines. Related Articles
Competing in the High 5 class at the 2022 Builder’s Brawl, Kyle Needham and his 1979 Camaro were relying on a 434 cid small block Chevy nitrous engine to help get the win. Check out the details of this build!
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