612" bbf timing

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612" bbf timing

Post  Hardy on July 24th 2015, 6:38 pm

Hey guys, just looking for some thoughts from some of you who have experience with similar deals to see if we are on the right track. 612" (4.6x4.6), 6.8 rod, ~15:1 compression, profiler heads from TRE 528 cfm @ .900, sheetmetal intake with two prosyatems dominators on q16, cam I think is .890 lift and I want to say 288/306 @ .050 and I think 116 lsa. Just curious what to use for a starting point from timing, and where you'd guess it would perform best. Obviously, well test n tune to figure it out, but our builder thinks it should work well at 26-28*, my brother and I think 31-32* is more realistic. What you say?

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Re: 612" bbf timing

Post  BOSS 429 on July 25th 2015, 12:11 am

either of those could be close, depending on how good the heads work with that cam,and intake,but really should dyno it
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Re: 612" bbf timing

Post  kim on July 25th 2015, 8:12 am

Because of the unique properties of Q16, 28-30 is probably going to be peak power. On non oxygenate fuel its probably best about 32.

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Re: 612" bbf timing

Post  Hardy on July 25th 2015, 8:59 am

Interesting about the q16. I was thinking about that the other day and was thinking that Q would possibly require less timing, but I don't have the tuning experience to have seen it first hand. Appreciate the replies guys.
P.s. I definitely agree it should be dynoed and it will be this offseason.

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