Gen 4 LS1 Camaros and Trans Ams are great sports cars, but they just can't keep up with the newer models without some help. How about some bolt-on upgrades so that you can start running 12's and racking ups some wins?
At Borowski Race Engines, we took our 2001 Camaro Z28 with 119K miles and documented a multi-step, bolt-on upgrade to its bone-stock, never-been-touched LS1 engine that jumped rear wheel horsepower from 318 to 410. Given a 20% drive train loss through its 4L60 automatic trans, that translates to a final engine dyno result of about 512 hp. The video will link to the first of a YouTube playlist of videos that documented the process step-by-step with chassis dynos and shows the outcomes on both the drag and road tracks.
The engine upgrade centered around the cylinder heads and cam. The LS1's cylinder heads were CNC ported, CNC valve jobbed, milled flat and filled with a new set of Manley valves and PAC springs. We paired these heads with a COMP Cams hydraulic roller selected for a balance of performance and street-ability. The stock intake and 75mm throttle body were replaced with FAST's 92mm throttle body and intake manifold. While rear power power climbed to 357 hp, this half-step of only upgrading the intake side is not recommended. We did it for demonstration purposes only.
A matched set of Hooker mid-length 1 7/8 inch headers and true dual exhaust system (not emissions compliant) was then installed to allow the engine to properly exhale. Since the previous intake-only step pushed the stock injectors to 90% duty cycle, we also installed a set of DeatschWerks 42 lb injectors for adequate fuel flow. Being now able to fully inhale and exhale, the Z28 laid down 410 rwhp on the chassis dyno, up 29% from baseline.
This complete package includes the same parts we needed to push our Gen 4 Z28 over 500 fwhp and into the 12's for the quarter mile.
In addition to the above mentioned main parts, the kit contains the following brand-name parts we know that you'll need and want:
- Gaskets: timing cover, water pump, intake manifold, valley pan, cylinder heads (MLS), valve covers
- ARP head bolt kit
- NGK Racing spark plugs
- COMP vacuum canister for brake system
The cam and exhaust system selection depends upon your intended end use. You should call us at 815-725-2727 to talk through your plans so we can customize a kit for your exact needs. To give you an idea of possible kit customization, we chose to replace certain additional parts for enhanced service life and reliability such as the lifters, timing chain, oil pump and air fuel sensors. Because we use the Z28 primarily for road racing, we also installed a COMP vacuum pump to guarantee maximum brake boost no matter what we are doing on the track. Our next planned upgrade for the Camaro is a new higher-stall torque converter and seriously beefed up 4L60e transmission from Hughes Performance. Any and all of these items can be added to your package. All parts can also be purchased from us separately, but you'll lose the discount for buying a complete kit.
Like this kit but you have a different vehicle? Call us!
1. The exhaust system of this specific kit is not 50 state emissions compliant, but may be replaced by one this is.
2. There is $600 core charge deposit for LS1 heads which is billed separately and refunded upon receipt of usable cores.
3. There is no charge for shipping within the continental United States.
4. This package is intended for competition and is therefore not covered by any warranty, either expressed or implied.
5. Parts will be shipped separately.