A lot of great solid info, helps a lot thanks.

I was actually leaning to a bit milder on the Tomei 264 Poncams. (Lag can be fun tho...right?)

What standalone are you using?

Thanks. Flow numbers are rather useless without the bore size and test pipe/no test pipe along with pressure which you provided. These 4v/cyl heads flow pretty damn well but the bore is quite a bit bigger than what I'm used to dealing with too. A good aftermarket LS head for a street car flows around 340-350CFM @ .600" lift on a 4.00 bore @28". Race heads are 380-400+@4.125. I think stock LS6 heads are 270ish@.600". Of course that is *8.

The dyno sheets for the Tomei kits were run with a 256/256 cam set up. So the 264s will move the power slightly to the right of the sheet and raise it a bit higher.
That being said, their ARMS setup hits like a truck at 3500 rpm and carries it pretty much the whole way through. 264 sound like a perfect step up from the 256 that ran their tests with but not going too overboard with the 270.

Also I forgot to mention that while it's nice that my brake booster is away from the turbo manifold, my intake manifold did have clearance issues with the OEM hardlines coming from the master.
It was an easy fix though via stainless steel brake lines, banjo fitting adapters.

As for standalone stuff, mostly leaning toward a Haltech PS2000.. Ready to buy it and there's money set aside specifically for it, but for now I'm focused on putting the whole thing together first.



Yeah pretty useless information without knowing all the variables, lol.

Purpose of the numbers was to compare the two heads on the exact same test so I left the gritty stuff out.
Then you start comparing findings vs a head that was done on a different flow bench and the numbers all of a sudden don't mean anything. lol

Yeah it's crazy how it changes from bench to bench. It's no different than a dyno.

How much did that IM cost you anyways? Can't seem to find a decent one besides the GReddy. (Can't trust ISIS that much)

They sell it on their site for ~$1000 but I got mine for a little bit less, landed.

Unless you're shooting for more than 300 to the wheels, I'd keep the stock manifold. Had no issues with it from my old SR setup.

The ISIS knockoffs are actually not that bad, I know some local people running them without issues. Apparently they're an exact casting of the Greddy manifold.
I mean if I were spending on a budget and didn't mind knock off parts, the difference between the two would probably be negligible so I'd go with the ISIS.

...but I'm not that guy so...

Don't really see the point of mixing a build that'll mainly be Tomei parts. Unless I'm lazy and decide to go the disco potato route.

I guess yeah, but like I said before, if it's a street car and you're staying under 300whp, stick with the stock manifold.
The greddy manifolds are really nice though.

Just bumping this thread so I don't have to make a new one again later.

Waiting on my Vipec so... other minor tuning happened.

AKA converted my digital climate control lighting to LED



The picture doesn't do it justice at all because god damn does it look good in person.

Oh and we finished this up the other night.



The runner for cylinder 1 looks a bit wonky but it's not leaking. Might go back and fix it if it poses to be a problem.
Made the manifold to have no clearance issues and the runner ended up having to be configured that way. We'll see what happens.