igo300

Not looking to start a piggyback v tune debate.
Just some information.
Stock 1/4 mile runs 13.1 @ 105mph
MTM 13.0 to 12.9 @ 105MPH.

Stock on 98RON (95MON) pulls very little timing
Stock on 95RON ((1MON) pulls a bit more timing
MTM on 98RON pulls up to 11 degrees.

Stock boost as tested 10lbs
Manual boost gauge shows MTM boosting 13lb

So there is a definite increase in Boost BUT...almost contra'd out with timing pull.

However.. loaded up with 100RON (98MON)and timing pull problem gone.
No 1/4 mile yet but multiple 40MPH-65MPH runs show 0.5 seconds faster.

FWIW

igo300

Not looking to start a piggyback v tune debate.
Just some information.

Stock 1/4 mile runs 13.1 @ 105mph
MTM 13.0 to 12.9 @ 105MPH.

Stock on 98RON (95MON) pulls very little timing
Stock on 95RON (91MON) pulls a bit more timing
MTM on 98RON pulls up to 11 degrees.

Stock boost as tested 10lbs
Manual boost gauge shows MTM boosting 13lb

So there is a definite increase in Boost BUT...almost contra'd out with timing pull.

However.. loaded up with 100RON (98MON)and timing pull problem gone.
No 1/4 mile yet but multiple 40MPH-85MPH runs show 0.5 seconds faster.

TYPO CORRECTED

ilspazzaneve

Do you have timing and boost logs?

For assumption, I think where you say MON you mean RON+MON/2, since typically:
95 RON is equivalent to our 91 R+M
98 RON = 93 R+M
100 RON is 95-96 R+M

Stock typically doesn't pull ANY timing on our 91, unless the gas is crappy.
On 13 psig/stage I tunes, where there the blower recycle is held shut, it starts to pull timing slightly when ignition advance up top hits about 20 degrees. To pull 11 degrees means the timing up top must have been 25, 30, or more degrees advance?

Anyways this is all speculation unless there are logs to show.