I would have to double check. I think its 15 down low and 10 up top. However some higher hp guys do run zero split up top and we actually discussed the zero split topic at the tuning seminar at DGRR a few years back.

Thanks Nate.

I will sell you a 650DP holley thats boost prepped :)

Too much carb for a 12a stock ports.

Thanks though!

I can sell you a Racing Beat Holley carb and intake :)

Quoted from 7club-

The reason you lock the timing on a first gen dizzy blowthrough is the fact that the dizzy will NOT retard the timing under boost. At 10-15 psi under full boost you would only need a maximum timing of 5-10 degrees. So you lock the timing to where you would need the it at full boost.

That's just leading timing, and actually you lock it so it doesn't advance timing while the engine is under boost.

Trailing timing and split is obviously a source of contention among people. Everyone has a preference and an idea of what is safe. If that's what allegedly works, then go with that.

a whole bunch of folks, with good results too .

the turbo blow through holley pro's are CSU carburetors. they make over 1,000hp with a blow through holley, reliably :)

why would you believe anything you read on the 7 club? anybody with knowledge has been banned from there!

no, wrong. you lock/ weld the distributors centrifugal weights so as the engine revs up the timing dosnt advance.
why would mazda retard the timing on an n/a car?:beatdeadhorse5:

lock the dist. set your timing at 10 degrees advance and your done.:sifone:

That is basically what I posted from the 7club, you just stated it differently.

And they won't touch the RB Holley I have, they were the first people I contacted.

I am boost prepping the Nikki, so this thread can be closed anyway.

cliff notes:

1. i know some people have great results running zero split, 15* split, and hell, even negative split.
2. nate is running 15* of split in the midrange, probably where he's making peak torque.
3. 730whp12a just posted what we all already know -- run 10* of advance
4. so, run ~10* advance, 10* split, get your intercooler and carb setup nicely, and have fun tuning. :)

(and don't run more than 10 psi on 93 octane gasoline with those 9.4:1 rotors!)

well ,if you want a nikki turbo hat, let me know, i have some real nice ones :)

RCC member discount too!

Will do. What kind of price are we talking?

On your website they are $100, but on eBay they are $120.

How much for RCC?

$95.00 with free priority shipping for any RCC member

That is a good deal. I'll jump on that soon. I am waiting for my turbo and downpipe right now.