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Terry @ BMS Terry @ BMS is offline
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Join Date: Jan 2008
Default JB4 for Cadillac CT4 CT4-V CT5 CT5-V - 09-14-2021, 12:28 PM

Hey guys,

Working on JB4 development for the various turbocharged Cadillac models including the CT4, CT4-V, CT5, and CT5-V.

To that end was able to get a CT5-V in the office over the weekend for some initial dyno testing and tuning. Best run factory was 300whp and 392wtq. The power seemed a bit low as I've heard they claim 360 crank hp factory, but I haven't seen many other dynos on them so not really sure there.

With the JB4 we were able to crank power up to 354whp and 445wtq, adding around 5psi. We had a little programming snafu adding boost around 4000rpm which we'll address before release but other than that everything seems to be in order. Overall a solid little platform! As development continues we'll get some of the other models in for further dyno testing and tuning.

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