Milling heads

[427highriser]

sounds like you have the Fitzgeralds.the last one's we used came in at .033 compressed, that would put you at around .068 piston to head. they say .020 but we got different results. I don't think quench matters that much on a 9 to 1 motor ?? jack

[JimNolan]

Jack,
  I called Summit and gave them hell for advertising something that wasn't true. I looked up the Mr. Gasket website and they state that the compressed thickness of the 1132G is .030". That's OK. I'll live with that. I'll have the heads milled .030 to give me the 9.7CR / 7.64DCR, have the new valves installed and then set the heads on the block without gaskets and measure the fitment of the new intake then. Since the deck side and the intake sides are cut 1-1 on the heads, I should be able to minimize any futher screw-ups. The .062" quench I'll just have to live with. Thanks for pointing this out to me. It's hard when you don't know. This is a good forum for me. Jim

[hotrodfeguy]

My intake lost it's dog ears LOL And the ports were opened up to match the C1/LR ports But that is one fine intake either way. 

[JimNolan]

Guys,
    New intake came in today, really nice. I found out I really did have .030 deck height by using depth mikes on all four sides of piston. Hopefully that'll give me .060-.062" quench now. The heads were bolted down to the block without gasket and with the intake set in place and torqued, it gave me .008"/.009"/.008"/.009" intake high position on all four corners using the depth mikes. I'm milling .023" off the heads and that'll give me a pretty near flush valve cover rail without milling the intake side of the heads. The cam ended up being cut at 110/107 degrees. So I'm setting the ICL at 105 degrees so I'll end up with 9.58 CR / 7.6 DCR. With the big valves and 670 cfm Avenger the Desktop Dyno 5 says I'll be getting 389 HP at 5000 rpm / 477 ft. lbs at 3500 rpm. The problem I see is what am I going to do with 456 ft. lbs of torque at 2000 rpm, pull stumps I guess.
    It's a nice intake, I could have saved about $400.00 if I'd taken everyones advice on intakes to begin with. As long as I can cool this monstrasity I won't mind putting gas in it just to be able to drive it. Here's a couple smaller pics. Thanks everyone. Jim

[My427stang]

Jim did you end up having those heads ported?

[JimNolan]

As soon as he gets back home he should be calling me.  He has been busy with his shows. Hopefully it'll be next week. The valves are a must. There's @ ten horsepower in the intakes and @ 24 in the exhaust. It's worth the effort to make the heads flow better.

[hotrodfeguy]

And every one on the other site says too much cam kills the bottom end. Well look at what your DT-5 is saying at 2K Besides how many of us spend time down there driving our FE's really. Thats a awsome looking engine ya have there.

[My427stang]

As soon as he gets back home he should be calling me.  He has been busy with his shows. Hopefully it'll be next week. The valves are a must. There's @ ten horsepower in the intakes and @ 24 in the exhaust. It's worth the effort to make the heads flow better.

It is absolutely worth it.  I am not sure I agree with the exhaust valves helping that much, calculators tend to show a bigger benefit than what pan's out.  Intake flow is where it's at until the exhaust backs up, but having a good exhaust with a great flowing intake certainly is the goal.

Keep in mind, bigger valves without bowl work don't do much at all and really only get you new material for the valve seat