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Gotta laugh, better than crying. lol My engine guy flowed a DART CNC 400 CFM head for comparison and on his bench he got 398 CFM.. So something is way off at Hughes. When I confronted them their attitude changed rather quickly.. just sayin

I am going thru this now with my big block max wedge victors, I sent Hughes the heads for their monster max wedge cnc porting and their numbers are well exaggerated to actual results. they claim 397 cfm at 700 and my heads after the cnc are showing 346...

sorry for the delay in response - just saw the post my issue was solved - it was the lunati barbell lifters causing the oil pressure problem, ended up using Hughes cool face solid with EDM and problem solved !!!

what type of cam and lifters are you running in there ?

fed up with them, this is the 4th time I have ordered stuff from them with issues, bent cam, bad lifter, timing chain issue, and now their pushrods, I needed a set of ball/cup pushrods approx. 7.35 length, I checked their website and summit and found part number 7692, now I had a set of their...

Does anyone have the specs on seat height for these lifters compared to a regular standard solid mopar lifter ? trying to determine approx. how much shorter pushrods need to be thanks

I'm not milling for just 1 cc, trying to determine the ratio or equivalent of 1 cc per deck milling height - to get proper compression ratio also trying determine what effect it will have on pushrod length

Thanks

Does anyone know how much milling needs to be done to the deck surface to lower the CC of the head by 1 CC ?? thanks

Yes , my sons 416 Duster was having issues, ended up changing pump and thermo to Milodon hi flow and removing the 2 10" electric fans and shroud from Champion, switched to a Derale 17 " mech fan, engine was getting to over 210 with the champion setup and now it's maintaining 185-190 cruising ...

Running a Kevco pan on my son's 416 Duster with TTI's and no clearance issues !

big shout out to mike @MRL I had a lengthy conversation with him on the issue, its definitely the lunati Lifter, their EDM style lifter is not a good fit for a higher lift cam. We went thru specs on the howard EDM's but my pushrods will not work since the howards sit a little taller. I just...

Dave - would running straight 30 make the hot idle pressure better or worse ? based on the chart Im thinking worse ???

MadDart - what do you suggest to remedy this ? should i change to a different weight oil ? will synthetic help ? hi volume pump or hi pressure pump ?

I agree ! my car is a 72 Cuda 340 and im running a 1068 and the filter is close to the header and i'm running 35/40 at hot idle with 60+ cruising,

lol, I thought that is what you meant, did you change anything or did you just run it that way? Should we change to a high volume pump ???

What filter are you guy's running on your 416's - our build is a 72 Duster, 416 with TTi step headers, the 1068 is a real tight fit and the 1085 seems better, have not tried the 1515 because I don't think it will fit, I have all the parts to run a remote setup but have not had the time to do it...

MadDart - what do you mean by w\"wicking it up"

motor was broken in and dynoed with "Spectro high zinc motor guard break in oil"

that's what i'm starting to realize, unfortunately !!!!

i'm with you ! one thing the builder said, which may have some validity. is that the header clearance by the filter is causing the engine oil to become hotter than the engine water temp which can cause loss in viscosity, he recommended some header wrap to reduce the heat transfer to the oil...

hot - 35-40

running an autometer mechanical with copper tubing, originally had the nylon tubing but that was the first thing we changed

ne when I talked to him today, he said to change to straight 30, I was running the Valv (not street legal) 20/50, he also mentioned that since we almost overheated last week, (temp got to 220+) we may have broken down the oil ??? said to dump it and go straight 30 ???

have not checked that yet, that is my next step in the discovery, my understanding is that this plug is just a diverter to the oil filter and has no effect on pressure ??? am I off-base ?

yes we are using ARP main studs, the builder ruined the first pump from Mike @ MRL because he ground down too much and broke thru the housing, he then replaced pump with a standard Melling (so i'm told) then clearanced the pump and shortened the stud and bolt on a Bridgeport..

my understanding is if the block had oversize lifter bores there would be some markings on the block, does anyone know where I can look for the markings ??? I have no history on this block

not sure, we used the MP timing chain tensioner and I had a conversation with the builder and he assured me all the plugs were installed

we are running a solid Lunati Voodoo # 60442 with their EDM lifters, I read somewhere today that edm's may cause lower pressures ???

you are right on crackedback, originally had the 1068 on it, switched over to the 1085 witch is a little shorter, I have a 51515 on the shelf but I don't think it will fit, I had a tough time getting the 1068 off with the TTi's, things are so tight on this, the reason why I went to the 1085, we...