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| General Modular/Ford Tech General discussion not specific to head type and FAQs. |
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#1
04-20-2009, 09:01 PM
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Who has measured piston to valve clearance
Who has actually measured piston to valve clearance and what numbers did you find along with cam specs and RPM range.
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#2
04-20-2009, 09:11 PM
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Oh god off the top of my head from several years ago.
Crower 62802-2 .060ish with no reliefs and ALOT with. I spin mine to 7200+
__________________
It's 11:59 on Radio Free America; this is Uncle Sam, with music, and the truth until dawn. Right now I've got a few words for some of our brothers and sisters in the occupied zone: "the chair is against the wall, the chair is against the wall", "john has a long mustache, john has a long mustache". It's twelve o'clock, America, another day closer to victory. And for all of you out there, on, or behind the line, this is your song.
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#3
04-20-2009, 09:12 PM
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i just pray that there is enough. LOL
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#4
04-20-2009, 09:33 PM
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16v
Comp 270s...stock pistons- .055-.060" at about 115-116* Intake Centerline...um...6500 ish I think Comp 270s...Mahle -18cc pistons, +1mm intake and exhaust, .068-.072" at about 114-115* intake centerline-7000 rpm VT IIs, stock long block, I can't remember the clearance, but I wanna say it was just over .065, with a 114* C/L -6200...waiting for a good tune 98 GT, stock L/B, Comp stage 1...(262s?) Plenty of clearance installed straight up. Don't know rpms... 5.4 L block, Crower IIs, +1 valves, GOBs of clearance...Straight up. No idea on RPMs 4.6, stock heads, Crower II S/C cams, I think a 114* C/L, .070" clearance...6700-6800 easy 32v Crower Stage IIIs, Stock Aviator longblock, .055 intake, installed at 114-115*...7100+....intake choking it. Ill let you know on my new build too, Nick...but Ill have reliefs... 
__________________
Matt 1989 Notch-Big Bore 32v??? Last edited by NeverEnuff; 04-20-2009 at 09:36 PM.
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#5
04-20-2009, 09:53 PM
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You know what mine is...tight but tolerable.
__________________
Jeff Stafford NMRA MM #5 4R70W by BC-Automotive 2V Heads/Cams by Modular Head Shop Circle D Specialties Converter http://www.modularmisfits.com
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#6
04-20-2009, 10:09 PM
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Quote:
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#7
04-20-2009, 11:41 PM
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LOL....you are correct...
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Matt 1989 Notch-Big Bore 32v???
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#8
04-21-2009, 09:00 AM
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Damn thats more info in this thread than all the other forums combined
 I am specing out some custom cams and I think my balls are bigger than they should be so I need a reality check. Matt it looks like many of those cams are installed slightly retarded which depresses me. I am trying to squeeze in as much duration as possible on a 110 intake centerline with the stock pistons but lower margin valves. I am thinking 0.060" is about where I want to be for other peoples motors but I will probably go as tight as 0.036" with mine. 0.036" is my quench height so the piston will meet the head at that point 
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#9
04-21-2009, 11:40 PM
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LOL some big balls in here I wouldn't run anything tighter than .070 on the intake and .100 on the exhaust.
__________________
2008 NMRA Pure Street Champion Thanks in part to: DYNOJET ACT CLUTCH TEAM Z MOTORSPORTS CINCY SPEED WAREHOUSE
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#10
04-22-2009, 08:51 AM
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Big balls that are feeling a breeze at the moment.
I have learned quite a bit over the last few weeks and a 110 intake install centerline keeps popping up on the better 2V NA street/strip motors no matter what the cam used.
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