baddbob71
Apr 14th, 04, 12:00 AM
Does anyone here know how much can be milled safely from 049 heads? And what amount in cc's is removed per .001 cut? Hope I can get the compression I need with the SRP pistons I bought :rolleyes: Bob
|
ak69 Apr 14th, 04, 12:45 AM I have a set of 049's that were angle milled to 112cc chambers, side rails of intake manifold were cut to match the heads. I do not recall the amount of material removed in .000 to achieve the 112cc chambers, at work and would have to look at the machine shop invoice. Does that help any? supersport6667 Apr 14th, 04, 12:47 AM What chamber size are U trying to get?? what piston do U have and compression ratio U looking for????? A 70 #290 oval port is also a good flowing head and already has a much smaller chamber size 101cc. A 71 #820 is a semi open with chamber size of 113cc. Something to think about. Wolfplace Apr 14th, 04, 12:53 AM Originally posted by baddbob71: Does anyone here know how much can be milled safely from 049 heads? And what amount in cc's is removed per .001 cut? Hope I can get the compression I need with the SRP pistons I bought :rolleyes: Bob = It's about .006/cc flat milling for open chamber heads. 71454Chevelle Apr 14th, 04, 6:12 AM I had my 049's flat milled awhile back. I had 0.040" taken off the deck and I think (??) 0.020" off the intake side. It took my chambers from about 122cc to 113-114 cc. gatewayracer Apr 15th, 04, 1:00 AM about .060 is the most youll want to take off, the deck starts to get thin after that. Thats about where my 049's are at about 110 CC's in the chamber. If you are running SRP high domes, be carefull! The chamber shape is not a real good fit and the domes may need to be shaped to avoid contact. If you're using the 10.25 to 1 SRP dome, don't worry, you'll never make contact! My Chevelle Page (http://home.swbell.net/kenladd/Home.html) 3830 lbs All Steel with full interior 10.25 1/4 mile @ 130 MPH gatewayracer Apr 15th, 04, 1:14 AM Also, don't even consider angle milling! Flat milling is what you want. My Chevelle Page (http://home.swbell.net/kenladd/Home.html) 3830 lbs All Steel with full interior 10.25 1/4 mile @ 130 MPH 71454Chevelle Apr 15th, 04, 6:29 AM Hey Gatewayracer, What kind of upgrades did you make to your car besides a cam swap? You had it running real good before (low 11's), but man, :eek: you dropped a whole second! What did you do? graemlins/thumbsup.gif JIM Apr 15th, 04, 7:38 AM Good question Darren, I'd like to know also. What is the actual CR and what was done to those heads?? gatewayracer Apr 15th, 04, 11:38 PM Upgrades? I decided last year that tuning would get me into high 10 territory but wasn't were I wanted to be so I planned out the below upgrades for about 100 HP/Torque increase. New .225/.188" valves in the heads with a little more work on the short turn radius. New pistons with the same weight(didn't need to re-balance) but they have more dome for a final compression of 12.5 to 1. New Comp Cams (marine) cam, .262/.272 @50 with .670/.670 lift **Marine cam because at 3800lbs this is a boat** This is obviously a very good cam! 2" Hooker headers with 3.5" collector. Same block/crank/rods/049 iron heads/victor jr/MSD ignition/chassis etc. The 10.24 @ 130 mph is running alcohol on an 830 DP, I also have an 850 holley for running gas and have been driving it on the street with no problems. right now were heavy into race season so the alky carb stays on. Thanks guys! My Chevelle Page (http://home.swbell.net/kenladd/Home.html) 3830 lbs All Steel with full interior 10.25 1/4 mile @ 130 MPH | ||