ProCharger introduced us to their new D1-X Accessory Drive at PRI 2022. They sell it as complete a complete system thereby eliminating the grief of trying to make it work on your own. Our immediate thought was that we could build it using a liquid-to-air intercooler sandwiched in a Holley intake manifold. That would make it plug-and-play. No issues of how to stuff a big air-to-air intake under the hood somewhere. We liked what we saw and ordered one on the spot. We picked the 10-rib version over the 8-rib because you just can't have too much grip on a belt driven system.
Making power on boosted engines is all about keeping inlet air temps as low as possible. Our original recipe combined a Holley Lo-Ram intake with 417 Motorsports' largest size intercooler. Edelbrock was teasing a new FAST intercooler / LSXR intake manifold combo at PRI 2023. They were touting way more cooling capability with a low pressure drop. It took them a while, but we finally got our hands on one. We found out that they were telling the truth.
The new build kept the same 370ci short block (described in the next paragraph), but we upgraded the heads to our CNC rendition of the AFR 6-bolt, 12-degree Mongoose LS3 head and fabricated a larger diameter intake pipe. The results were stunning. Inlet air temps were 88 degrees (F) and didn't move after repeated dyno pulls. Final pull was 1,151 hp, a gain of 88 hp. Check out the video to see the dyno pull for yourself - 1,151 hp at 7,300 rpm.
The foundation is our standard boost-ready 370ci shortblock. It features a seasoned GM 6.0L block that we have digitally remastered on our CNCs. That includes full block prep and engraving on our Rottler 4-axis CNC mill followed by honing on our Rottler diamond, CNC hone. The latter has precision of +/-0.0001" and produces the exact finish we want time after time. The machining data is stored in the the machines' memory and the surface finishes are confirmed with our profilometer.
The crank is a Callies Compstar 8-counterweight with stock stroke. The additional counterweights reduce harmonics and increase stiffness. The net result is a stronger, smoother running engine. The rotating assembly is completed with Callies Compstar Extreme rods and Diamond R-series pistons. Our custom COMP hydraulic roller cam for boost provides a great balance of power across the RPM band.
As mentioned above, the heads we now use are AFR 12-degree LS3's which are surface milled and then ported on our 5-axis CNC. A key additional machining step is valve job and bowl blending on our Newen CNC seat and guide machine. These heads come equipped with a COMP trunnion kit to stabilize the valve train at higher RPM. Check out the machining video playlist on YouTube channel (@borowskirace).
The complete engine comes as shown in the photo with a fabricated intake pipe. In addition, the tune from the dyno session will come loaded on the included Holley Terminator X's ECU. There are a variety of Terminator X and X-Max options which can provide such features as drive-by-wire and automatic transmission control. FuelTech EFI systems are also available and provide additional features such as an integrated, waterproof display and more robust harness.
Would you rather run an air-to-air intercooler or alcohol fuel? We can delete the intercooler. The lower profile 417 Motorsports / Holley Low-Ram combo is shown in the photo set is also available. We are also waiting for ProCharger to release their super-low profile intercooler/intake combo that was displayed on our long block at PRI2024. Have other ideas? Let us know. We are happy to build it your way.
Please click BUY NOW for more information or give us a call at 815-725-2727.
Notes
1 These engines are not pollution compliant and are intended for transportation use only in pre-pollution controlled vehicles.
2 All BRE engines are individually dyno tested and tuned. Customers will be supplied with video of their engine's dyno along with the dyno and build sheets.
3 Dyno results on the same engine are influenced by atmospheric conditions. The same engine can easily test +/- 2% different on horsepower depending upon ambient conditions. The engine you receive will have completed its dyno session at no less than 98% of rated horsepower with the tune we provide.
4. Most of the photos with this ad are original recipe version with the silver Holley intake manifold. The engine was still warm from the dyno when we shipped it to ProCharger for PRI.
BUILT FOR PEOPLE WHO LOVE MOTORSPORTS BY PEOPLE WHO LOVE MOTORSPORTS!
