I understand there is going to be some variance between benches, Ryan, I was just trying to make a ballpark comparison.

So, that being said, and with those numbers above, what would you say the best cast iron ported head below a W-2 would be for the money?

Cast Iron? Who wants cast iron? LOL Umm..............2.02" in a magnum, got to be best iron for the $ IMO. They have alot of advantages over old J heads etc. Better chamber, better wet flow, better exhaust (maybe LOL), lighter valves, round lock grooves, 10 valve cover bolts, just alot better catsings, hardened seats etc etc etc. Magnums are "the deal" IMO. Stuff an AMC pushrod oil lifter in it, hollow pushrods and run 'em.

Not quite like having them on your bench, but here is a link to some pictures of the R/T and Magnum heads side by side.

http://www.geocities.com/alwest_83/magnum.html

Jeff

I need to stick my fingers in an R/T intake port..... I could tell you within 10 seconds how much better they would be. Pics are OK, but you can't tell everything from a photo.

Any idea what the increase in flow would be using then MP porting templates?. I was also planning on going to the 2.02 intake.

How long did it take you to port the set you took the pics of?. Thanks .

I'll probably have 20 hours total in these heads. 1.5 Hrs per intake port and 1 hour per exhaust.

No idea about the porting templates....

More tidbits for the smallblock stew brewing here. My dad runs the Mopar Performance iron heads that were discontinued awile back. He bought them bare and had them ported and fitted with Manley chevy valves with the smaller stem.
Intake 28" h2o 1.96 valve:
.100= 74.7
.200= 140.9
.300= 193.5
.400= 224.2
.500= 242.0
.600= 242.2
Exhaust 1.60 valve
.100=53.1
.200= 107.1
.300= 147.2
.400= 167.0
.500= 177.6
.600= 182.3
I'll try to dig up a part number but I believe they were the old "swirl port" head. He has just bought some w-2's for next years project. "As is", they didn't flow any better than the heads he's running now (same bench).

I ported a set of magnum heads about 3 years ago and spent about 50 hours doing it!!! cast iron dust everywhere!!! next time( if there is a next time) I will use a mask as I started catching a buzzz after breathing all that dust .... My hand was also numb for about 2 weeks after all the grinding with my dremel grinder... but I was pretty happy with the end result as all I did was clean up the bowls but they really needed lots of grinding as the valve guide bosses have so much extra meat around them.... I used these heads on a 360 and they ran very well.. I currently have them on a 70 318 with headers and this thing has so much more power it's unbelievable.... The tall, skinny ports give good velocity and these heads make a nice choice for a street/strip setup.. based on how well they work on my brothers 318, I would say these heads are a great choice for a 318 .... Eventually, These heads will make it to my 109K mile 5.2 Grand Cherokee and I just might throw a 4" crank at it as well TBF

hey ryan, just curious if you'd cc'd a port yet, and how the port volume compares with some other "street" heads you've done

Really 183? Rumor had it that later-model 5.9's had larger 163cc ports (versus the 5.2L 153cc ports). The casting number you refer to is supposed to be the larger 5.9L head.

Did you measure before porting? Did you really take 20cc out of the bowl or did you go into the throat and runner to get that volume?

Jeff

Just got my heads. Wow. I like them so far.











Not the greatest pics in the work, but hey, they are better than none!

Look just like mine, real rough in the exhaust. With stock retainers/keepers I was way under the 1.64 spring height MP advertises, more like 1.595, but consistent. With hughes retainers (advertised plus 0.125, they were actually almost perfect at plus 0.045?) got me 1.64 for hughes springs spec'ed for 1.66.

I spent maybe 5 hours cleaning up and polishing the exhaust, definitely a lot a meat in the casting to machined area of the exhaust port, and around the valve guide.

The intake I only spent 3 hours (got the feel for the bit)as it was much "cleaner?" around the casting/machined area, but I did shave a good 0.080 off the pushrod pinch, and gasket match. Didn't spent much time at all around the valve guide, much more intimidating to me, hard to control the bit so I left it alone.

I also eliminated thread bulges where ever they could be found. This was my first porting (if you can call it porting).

Ryan very nice work keep up the good work and all the info you supply us on small block cyld heads your very helpful to a lot of people would like to see other shop post there numbers dont think your going to find anyone out there doing any better work then you thats for sure keep up the great work

From what I can see, I'm in LOVE with those Magnum R/T's.......

wow 183cc, that's bigger than I expected...is that about the same as a ported 360 or eddie? the 302's, werent those down near 145 or was is 163cc finished?

one more dumb question: chamber size-- how does it compare to the eddies and 302's?