salemetro

iTrader: (5)

Ok...so here goes;

I've had a bunch of spare parts laying around the shop...mostly new, from previous builds that changed direction, or just never happened for one reason or another. I've now come to the point on one of my cars that I've just decided to say "screw it", and put together what should be a monster (2001 Mazda Miata). I'm no cam selection expert, but am thinking that I should have a pretty potent combination when all is said and done...even though the heads aren't ideal. I'm just wondering what some of you think about the cam selection on this, as I know it's not perfect...but seems to me that it should do pretty well with the split duration favoring the exhaust. The LSA does not seem to be ideal as best I can tell, but anyway....

Here's the engine combo that I'm putting together:

383 kit consisting of the following...

-LS6 block @ 3.905 (decked,studs, etc)
-Callies Compstar 4.0 stroke crank
-Scat 6.125 Rods w/ARP 2000bolts
-Diamond 11504 Pistons (-7cc) with coated dish/skirts
-Ported 317 heads (don't have the flow sheet in front of me currently)
-Fast 102 w/ 90mm TB (using this combo because I already have it)
-Static comp is right at 9.9:1
-EPS 226/234 .605/.605 on a 113 L/S
-Hex-a-just sprockets with C5R chain
-Shorty 1 5/8 headers merging into a single 2.75 hot side turbo feed
-Rear mounted S480 80/83
-2.75 Cold side charge to FMIC

I'm hoping to keep the boost under 12psi, as I really don't want to run meth....with a goal of 750whp on this. Optimistic? Probably. Anyway....

Thoughts on cam specs for this setup?

RonSSNova

iTrader: (3)

It will never work. Therefore, since I'm close, less than an hour away, just haul all the stuff up here to me.
I'll take your L33 too, since you will want to put the orig Miata engine back in.......
:-)
Ron

RonSSNova

iTrader: (3)

FWIW on cams.
It seems that some cams are better than others.
What I've noticed is that nearly anything will work. Even stock ones.
I'm sure you are in the ball park there!

salemetro

iTrader: (5)

Thanks Ron. Yeah, I was guessing that it was pretty close. I've seen some pretty odd grinds on some of these setups...even a few that favor intake by as much as 6*, which just does not seem right to me on a FI application.

My biggest concern is back pressure on this setup...but it seems it's all about trade-offs in this type of rear mount setup. Spool vs Pressure ratio, etc....I'm really just wanting to get it as close as reasonably possible as cam swaps really suck in this car. I guess that I'll just get it all together, and see what it does....unless some of the cam "gurus' on here have some input to offer?