Choosing the right 1.8t Turbo Kit can significantly impact your car’s performance. Having experimented with various turbo setups on a 1.8T engine, including K03, K04-15, hybrid Frankenturbo, GTRS eliminator, 60-1 T3/T4, and a Comp Triplex 5556, this article shares insights into finding the optimal turbocharger for your needs.
GTRS Eliminator: A Balanced Approach to Power and Drivability
Among the numerous turbo options available for the 1.8T engine, the GTRS eliminator stands out as an excellent compromise between power, drivability, and reliability. With the right supporting modifications, achieving 300 crank horsepower on stock internals is achievable. The GTRS eliminator’s boost onset and full boost delivery provide excellent power under the curve.
For instance, a GTRS eliminator at 3500 feet elevation can hit 21 PSI around 3200 RPM. At lower elevations (under 1000 ft), this could translate to around 2700 RPM, with positive pressure building as early as 1800-2000 RPM. With a 7000 RPM redline, this setup provides a robust 4000 RPM powerband and impressive transient response above 3000 RPM.
Frankenturbo: A Strong Contender with Enhanced Response
The newer generation of Frankenturbo chargers, featuring mixed flow turbines and improved compressor designs, also present a compelling option for 1.8t turbo kits. These turbos boast even better boost response and deliver more early and peak torque compared to the GTRS eliminator, resulting in a similarly impressive power curve.
Both the GTRS eliminator and the Frankenturbo offer compelling performance enhancements for your 1.8T. Frankenturbo might be a more straightforward upgrade path requiring fewer modifications to your current setup.
Considering APR Kits and Tuning Options
While APR 1.8t turbo kits were popular choices in the past, they may require exhaust modifications to accommodate the Garrett turbo discharge flange. Furthermore, T25 flanged GT28RS turbos in APR kits don’t offer significant power advantages over eliminator-style turbos, as their turbine volute areas are identical. The larger T25 throat might even increase spool time without adding power. This modification could add significant costs to the installation.
Moreover, advancements in tuning software have surpassed the older APR Stage 3+ tunes. Modern tuning options offer greater flexibility and customization for ambient conditions, fuel types, and additional modifications like water/meth injection.
Conclusion: Choosing the Right 1.8t Turbo Kit
Ultimately, the best 1.8t turbo kit depends on individual needs and preferences. While the GTRS eliminator and Frankenturbo offer compelling performance and drivability, factors like budget, existing modifications, and tuning options should be carefully considered. Modern tuning solutions often provide superior performance and customization compared to older pre-packaged kits. Remember to research thoroughly and choose components that align with your overall performance goals and budget.
