advancing timing with BTM?

[sunnys14]

craving4boost came up with an idea that i never thought of. he said why dont i advance base timing to about 22btdc or more then retard a lil more than usual with BTM. @ 14psi with 91 octane, how much should u retard? 1degree per psi? less? more???

[fiznat]

Why would you do that?

[Chezedik]

To have advanced timing before spool, so pull off the line would be faster. Then gradually retard timing to the extent that it would reduce ping. Although, I would think the opposite would hold true, and that you would want to have retarded timing leaving the line, and advance it (disregarding the turbo, of course).

[Craving4Boost]

i actually heard it from someone else but i think this is an interesting idea. however i dont know how much each degree of advance can improve any performance. would this help spool the turbo faster?

[Florida240sx]

HMM I could try it. Advance 4 degress...And have btm set at .75ish.So it would about 4 degress retard at 10psi... I know it would be 3.5 retard but can't exactly dial in btm. That should be safe no? At 5psi I would be at stock timing Then starts to retard...Maybe advance 5-6 degrees My octane is 93 here in florida

[Craving4Boost]

do you have a msd knock sensor or some sort? cant really tell if its ok unless we have some insight of whats happening inside

[pr240sx]

You can make a restrictor of some sort so the BTM only sees partial boost.I have a BTM to retard 10 degrees if I overboost past 10 psi as a safety measure. I think that you can make exactly the same. Havind your base timing at 20 (stock) and starting to retard past 5 psi.

[Craving4Boost]

how do you set that? the BTM can only be set to retard a certain degree at any psi. unless you have a different one. i dont have that option on my BTM. but i perfer nissanfanatics overboost protector

[Chezedik]

+1^, seems like a waste of money if that is all you use it for. I thought the idea was so that you could boost the crap out of a stock block. That is what I am using it for, 1 degree per psi til I max it. Then use the overboost protector at 16-17psi at manifold. The BTM will control my Jacob's i.C.E. Pak.

[shockload]

i was planning on using the msd btm, just havent gotten one. it would help out a lot in low rpms to get the turbo spooling the advance only needs to be at low rpm then retard to keep the a/f right as boost builds. it would make a healthier low to mid end power curve if it was set up right. i would only recomend using the btm for a budget oriented setup , if you run a chipped ecu then you just have to re burn your program to alter your spark curve.

[Florida240sx]

I got the SAFC whooked up to stock knock sensor.Which I know isn't to accurate but.If there is somethign goign on wrong it will show some high #'s. It can show high #'s due to other engine noise but can at least tell if somethign bad happens.Why not test this ka.It got abused to hell before I got it.I pray that it starts.