New TR8 Dyno Info

[Ron Earp]

As a side note, lean means VERY lean > 18:1, off the wide band scale actually. We added fuel to the motor and each time we did hp increased 3-4 hp with every turn of the adjustment. But, the adjustment on the carbs maxed out and about the best she would come to was 17:1, still dangerously lean according to this dyno data system.

Which explains quite a bit, like why it runs so hot under load but will sit at idle on a 95F day and be cool. If feel that if the motor had more timing or more compression at that A/F we might have seen a BOOM in short order. Larger main jets will be in order to capture the hp left in this motor.

But, for a full 10/10th effort there is still more work to be done on the exhaust and heads as Jeff mentioned, plus timing curve issues with full timing advance being lower than expected.

[lateapex911]

As a side note, lean means VERY lean > 18:1, off the wide band scale actually. We added fuel to the motor and each time we did hp increased 3-4 hp with every turn of the adjustment. But, the adjustment on the carbs maxed out and about the best she would come to was 17:1, still dangerously lean according to this dyno data system.

Which explains quite a bit, like why it runs so hot under load but will sit at idle on a 95F day and be cool. If feel that if the motor had more timing or more compression at that A/F we might have seen a BOOM in short order. Larger main jets will be in order to capture the hp left in this motor.

But, for a full 10/10th effort there is still more work to be done on the exhaust and heads as Jeff mentioned, plus timing curve issues with full timing advance being lower than expected.
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Sounds like a great step in the right direction! Keep chasing it, and maybe a EGT guage on the next dyno test would help you at the track in chasing this issue at the track. (Make notes of ideal temp from dyno, then replicate at track...or does that only work on rotaries? )