Chevy 487 head flow numbers
WebCylinder Head Flow Data Table: AMC: Manufacturer /Part Number: Port/Vol Intake / Exhaust: Valve Size Intake / Exhaust: Combust. Chamber Volume.100" Intake / Exhaust.200" ... 487 hp----183.6/125.0 68.08% 1.389/2.219: Chevy '462 Iron CCM: 157/64: 1.940/1.500-No Pipe: 62: 50/54 108.0%: 119/88 73.95%: 167/116
Chevy 487 head flow numbers
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WebJan 26, 2006 · The 187 casting data came from a Fast355 PM, and some came from Vizard's book Build & Modify Chevrolet SB Cylinder Heads. They confirm other tests on L98 heads. The 081 head (305 v8) was added because 081 (and 416) are often mentioned as being decent factory heads. WebNov 25, 2009 · installed 3/8 screw in studs / guideplates. Speed Pro OEM looking stamped steel rockers 1.60 ratio. those #487X heads are the "thicker" version of the open-chamber. 78 CC style heads, with 5/8 tapered seat plugs. my pair from memory didn't have induction hardened seats. the 2.080/1.600 valve change from 1.940/1.500.
WebFeb 8, 2011 · 487 and 487 x were good high flowing heads at the time.they should be the thick castings as far as water passages semi raised runner heads from the early 1970`s.if you get stock replacement valve springs form any auto parts or machine shop you should be fine.Spec have not changed much over the years.Most stock springs are 80lbs or so … WebJan 6, 2024 · I am looking for a set of "487" heads with the 2:02 valves dated before 12/1970. Thanks. If I remember right the 487 was later head and the 70 LT1 heads were 186's with a 492 casting replacement later in 1970. I do have a set of 487X casting heads on a 400 but I think the date code would be later and have 1.94 and 1.5 valves.
WebJan 14, 2012 · 302 Posts. #9 · Jan 12, 2012. 487 heads. i have a set on mt 350 except mine are 487x been looking for flow numbers cant find any not even on stan weiss, im thinking they flow close to camel humps somewhere around 215 intake at 500 lift.just using what i have for now, so if your budget permits go newer cause a set of vortec flow stock around ... WebMy main test objectives with the Edelbrock Chevy heads I have used are for street performance where true low-speed street output is called for. ... The top chart on page 84 shows the flow numbers you can expect. …
WebThis is probably the best cylinder head casting that Chevrolet has ever produced for a production small block Chevy. The casting quality is as good as the best aftermarket iron …
WebJul 12, 2012 · On the plus side, the Vortec intake port flows 42 cfm better than the stock heads at 0.500-inch lift and 18 cfm better on the exhaust side. Vortec Iron, Scoggin … dugopolje ploce kmWebJan 29, 2013 · like they said 487's r the better choice ithink they produced 270 hp on the 70-72 lt1 engines the 487x heads had 202 intake valves and produced 330hp on the lt1's the thing is you cant find the flow numbers anywhere if someone knows where please share this info i guess that the 487x's flow bout the same as camel humps except thay accept … dugopolje outlet radno vrijemeWebMay 26, 2024 · Apr 26, 2024. 1,963. Yukon Oklahoma. I got my 906 casting vortec head back from the machine shop. Same shop and same SF600 flow bench that flowed my 601 heads. Those are 305HO heads. The Vortec heads came off a 1996 chevy truck Virgin. I did not do any valve or seat grinding all I did was a bowl port and thin the guides and lap … dugopolje prostorni plan tekstWebApr 2, 2024 · 1971-up heads with casting numbers 882, 993, 487, 336 (and others) can have 3/8" exhaust stems as well as 1.72" intake valves. Heavy 20-30 Series truck uses these, mainly. Both small 1.72" intake and 3/8" … dugopolje mapsWebJan 23, 2016 · MidgetMotorsports07 wrote: the nitro man wrote: 441, 487 & 993 are all decent heads, but the 487x is the better head. yes they are... but getting scarce! I have 3 sets left, but I have countless 882s. there is no comparison between the others and the 882's for power. They just suck period and are thin castings as well. dugopolje croatiahttp://www.users.interport.net/s/r/srweiss/tablehdc.htm dugopolje fc resultsWebFeb 11, 2016 · Go back on the valve and try a 55 angle about .010-.015 wide just at the seat line on the edge of the valve. Then go to the chamber edge and break that edge with a … rb leipzig ao vivo gratis