lastcall190

iTrader: (36)

Well after extensive searching, some DCR excel spreadsheet work (thanks pianoprodigy), million PMs, I think I've narrowed down my search. I am pretty set on the TR230 cam, due to consistently seeing great numbers as well as healthy torque numbers. I'm looking to match it with the Livernois Stg2 heads with the comp 918 springs (.625 lift, the TR230 is in the .57x range on both sides so that should be adequate for long spring life, no?). I am not looking to mill, but use a .040 gasket giving me what appears to be a .033 quench, a 11.1x:1 SCR and ~8.44:1 DCR. I have also been pointed in a direction that includes AFR 225s, which at first I wasn't too keen on, but after weighing the price of the 90 90 combo, if I just put that price tag onto my heads, I'm at the AFR price tag. I chose that cam because it has shown to me some great under curve power, still can pull to redline, I drive the car everyday and the overlap is only 5* so that shouldn't be too outrageous for times when I'm putting around in traffic. Is my logic good, flawed, wrong, or just ugly? If you have any other suggestions feel free to voice them, I'm open to other cams in the same range (this doesn't include t-rex, MS3, MS4, G5x4, or anything remotely close to the 240 range). Thank you for your help.

-J

lastcall190

iTrader: (36)

Nobody?

brad8266

iTrader: (23)

The AFR heads have large chambers, what chamber size did you calculate DCR with? Also the AFR 205 runners may be more suited to your needs. The relative low lift does not always guarantee long spring life.

Other than that it sounds like you did your homework. 8.44 DCr with 5 degrees overlap makes for a good DD cam.

lastcall190

iTrader: (36)

I used the 64cc chambers which is what I had found when searching for 243 casting chamber size... I see they have the 205s with a 62cc Chamber potentially bumping SCR and DCR up to 11.36 and 8.68 respectively... wow. Here's one more question since I didn't see any place for it in the calculator, why would I benefit from the 205 runner versus the 225, velocity of the intake air due to being smaller? And therefore a larger runner would hurt me unless I'm spinning it up real high? Or am I mistaken... thanks for the response.

-J

EDIT: didn't see a 62cc version on AFR's site, I was on thunder's and saw a 62cc, apparently only offered in 66 and 64? Well regardless, I guess ignore the new CR numbers, and I'd imagine if I got the 64cc they are "as cast" versus the CNC'd 66cc ones. I guess I'd be better off with the ported ones and then mill them to compensate and reach 64 or even the 62cc?

brad8266

iTrader: (23)

AFR 225's are 62cc chambers and the 205's are 66cc, they cast their own heads. The advantage of the 205 is the high velocity air in the runner, it will help you with low end power while the 225's will flow big up top. You could go 205's and have them milled though to up compression and take advantage of the smaller runners at the same time.

lastcall190

iTrader: (36)

My edit was slow, it's almost a carbon copy of what you said I just made late realizations. Thanks again man.

-J

matts22

iTrader: (2)

I would think long and hard about doing the 90/90 setup, AND getting the manifold ported. IIRC, TEA did some testing and ended up changing their stance from "better to have the best heads" to "better to have mediocre heads with the 90/90". If you have the money, do both. But don't totally oppose the FAST setup.

Just my opinion.

brad8266

iTrader: (23)

yeah FAST 90/NW 90 works realy well on a H/C setup. Im working on getting that for my new setup.

lastcall190

iTrader: (36)

Yea ideally I'd like to do both, but I personally would rather just do the heads once. I got a while to think about this so we'll see what happens, thanks.

-J

01formula6

iTrader: (7)

Your proposed setup and justifications for choosing it seem very sound. In fact that is almost the same exact combo I'm going to get, and for the very same reasons. The only difference in what I'm planning is, using the .042 Mr. Gasket gaskets instead, and then having the heads milled to give me about a 8.5 DCR.