Quote:
Originally Posted by canaglia
I know that c7r can push over 700Nm, but is an extremely tuned racing engine made to copy the katech ls7r concept = insane torque release to achieve max power as soon as possible, indeed the engine revs up to just 6500rpm.
In its roots is almost a bespoke engine.
Cadillac dpi is a ECR tuned version of the road LT1, that share more parts with the street motor. According to some sources of mine, corvete DP 5.5 (LS9 derivated) was pushing 540-560hp (according to restrictors size) at about 7000rpm revving up to 7500rpm with a torque release of about 640Nm.
With larger restrictors to get 20-30hp more, it would be a quite balanced engine compared to the huge 6.2L.
No more need of extra ballast, smaller fuel tank, mandatory low DF rear wing and mandatory gears ratios.
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The C7.R engine is production-derived as well despite it' being so heavily tuned for racing. Even if IMSA had a production-based requirement, do you think GM would NOT use the better engine?
The old DP engine was not 5.5 liters, it was 5 liters.