I'll put the 4t80e to the test. So far it's much stronger than a stock 4t65-hd for sure. I have enough test runs + a solid 60 foot on it to prove that.
But is it stronger than full built 4t65-hd ? Too early to tell.
So far my impressions are much better power output at the wheels. It just seems to make power effortlessly to the wheels while the 4t65-hd was always on the converter and or always felt like it slipped at full power too.
But that tight converter is a ***** too, can't make decent boost until at least 3 seconds. Best boost at 4 seconds WOT. That makes it difficult to stage in my opinion.
Modifying the timing curve and fuel curve at spool up results is lower boost output. The current timing curve produces the best RPM and boost.
The stock Deville converter engages at 1600rpm and with 3 full seconds on the throttle 2700RPM
