Part#: ALL-20194. Manufacturer: Chevrolet. 601 heads were almost always on trucks, had 1.72 intake, 1.50 exhaust valves the same a Power Pack heads or 1.84/1.5 valves. 2.055/1.60 GM Vortec Bow-Tie Small Port PN# 25534421 Cast Iron 2.00/1.55 : GM Vortec Bow-Tie Large Port PN# 25534431 Cast Iron 2.00/1.55 : Chamber Size: 50cc/64cc/72cc: 50cc/64cc/72cc : 50cc/64cc/72cc: 65 cc: 65cc: Intake Runner: 180cc: 200cc : 200cc: 175cc: 206cc : Exhaust Runner : 65cc: 77cc : Flow Int/Exh @ 28 in. Stock 351W (C9, D0, D8, D9 castings) Cost per pair: Varies Material: Iron Combustion Chamber Size: 60-69cc depending on year. I am in the process of a port & polish job on the heads and will be building a 4 bolt .040 over block. The number along with the date code can be used to pinpoint the heads original application fairly closely. 601 heads were almost always on trucks, had 1.72 intake, 1.50 exhaust valves; same a Power Pack heads. The first generation that started it all in 1955, remained in effect until 1992, when the second generation (LT1) was released. Valve Sizes: 1.84" int. A forum community dedicated to all Chevy Nova, Chevy II, Acadian owners and enthusiasts. His numbers are made at 25" and most flow numbers you see now are at 28" (which has basically become the industry standard). Both are 1.84/1.50 valves. This especially helps at lower valve lifts, which is why mid-range flow numbers improve on better heads. There's an old thread on here that shows the Flow #'s of the 059s Vs 062/906 tho'. Not meaning to be negative here, but one thing I noticed was Vizard's numbers referenced looked low in comparison with the other numbers. The cylinder head included in this listing will fit the vehicles listed below. Most flow numbers for Scott Johnston heads come from them Web Site updated July '09. The heads are dated J224 & J254 (October 22, 1984 & October 25, 1984). Updated Aug. '12 and were converted from 10" to 28". It seems to me that the 601 and 416 are basically the same head except the 601 has 53cc combustion chambers and the 416 has 58 cc combustion chambers. Located under the valve covers, the casting number is the best way to ID a SBC head. And 305 just dont flow all that well stock. I'd suggest try trading the 882's for a set of 601 305 heads. 601 Heads: 1.72"/1.5" or 1.84"/1.5" valves, 53cc chambers 416 Heads: 1.84"/1.5" valves, 58cc chambers casting numbers are the same for both would depend on other parts used. 416 or 601 heads aren't that bad for a street car, especially if The heads are dated J224 & J254 (October 22, 1984 & October 25, 1984). Stock Cylinder Head Information And Flow Data, Re: Stock Cylinder Head Information And Flow Data, http://www.fullsizechevy.com/forumsad.php?t=178604, http://thirdgen.org/techbb2/showthrthreadid=198595, http://www.thirdgen.org/techbb2/shothreadid=177465, http://www.thirdgen.org/techbb2/sho4&highlight=LO5, http://www.thirdgen.org/techbb2/shothreadid=268064, http://www.thirdgen.org/techbb2/sho&threadid=97882, http://www.thirdgen.org/techbb2/sho=416+heads+flow, http://www.thirdgen.org/techbb2/sho3+head+flow+cfm, http://www.chevyhiperformance.com/t598/index4.html, http://herning.crosswinds.net/projects/350heads.html, http://www.hotrod.com/techarticles/_v6/index1.html, http://www.chevyhiperformance.com/t6359/index.html, http://www.chevyhiperformance.com/t359/index2.html, http://www.chevyhiperformance.com/t359/index3.html, http://www.fullsizechevy.com/forumst=183103&page=2, http://thirdgen.org/techbb2/showthrhighlight=swirl, http://mywebpage.netscape.com/fierost4rsc/tst4e.html, http://thirdgen.org/techbb2/showthread.php?s=01b489fe5&threadid=336750, Powered by UBB.threads PHP Forum Software 7.6.0. Porting L31 Vortec Heads. Detonation occurs while driving---10:1 compression. Casting number is 14022601. Fig 6-12, the stock L31 head is considerably better than the Fuelie- style heads we find ourselves working with if factory heads are the order-of the- day. *3 -- These flow numbers come from misc. BRODIX recommends this head be installed on a 400 cu in or larger engine. They were used from '68 through '72 on 302 CI Z-28 engines as well as '70 through '72 in LT-1 350 CI Corvette/Z-28 engines. Putting 305 heads on a 350 was a good way to bump compression back in the day when compression was low, and aftermarket heads were almost unattainable. Those days are long gone, and decent heads (be they aftermarket or Vortec) are cheaper than getting work done on old heads. Manufacturer /Part Number: Port/Vol Intake / Exhaust: Valve Size Intake / Exhaust Billy Ray, double check your block casting to make sure what motor you have. This is a picture of a finished 416 head. I will try higher octane this summer---may swap heads for actual 350s with 1.94s. The LT4 is substantially different from the LT1 casting, and the flow numbers explain why. Casting number is 14022601. This especially helps at lower valve lifts, which is why mid-range flow numbers improve on better heads. In the absence of a flow bench, Vortec heads are about the most goof-proof castings to rework and get good results. It is also important to review / confirm the fitment notes above to assure the vehicle specifics of the head are correct for your application. Valve sizes (1.94" intake x 1.5" exhaust or 2.02" intake x 1.60" exhaust) and whether or not screw-in studs and guideplates are in place can further ID them. *2 -- These flow numbers come from Pace GM Parts. 416 is the so called HO head has the same 1.84 and 1.5 valves as 601 casting but larger chamber, actually same chamber they used on all early 305 heads. Alum. This was sufficient to catch (and pass) several stock LT1 Trans Ams and Z28s. Popped off a V/C the other day to try to find out what heads i have. Be prepared for a big price tag at the dealer or steep core charge from your head porter. I can't say much good or bad about the 305 heads until I see a casting #. All flow numbers for Sabre Heads come from their Web Site. The block is a stock 350 bore size---probably 76cc chambers on the head area. If you want,, to adjust his numbers you need to multiply them by the square root of (28 divided by 25) or 1.0583. Still, the engine has managed to push the 3550 pound car to nearly 101 MPH! They look like they would flow the same amount of air and I'm pretty sure both are 160cc intake runners. You could probably pocket port them to 165cc. Actually, the 601 heads have 53cc chambers. In the absence of a flow bench, Vortec heads are about the most goof-proof castings to rework and get good results. 11-03-08 03:23 AM - Post# 1555753. Although impressive, these numbers often dont translate from the flow bench to real-world performance, especially in street performance applications. 1.54" exh. Hardware: Varies Rocker Mount Type: Press in stud Runner Volumes: est 140cc int. In a prior test, we had found a set of Patriots to be Updated Aug. '12 and were converted from 10" to 28". Remember that velocity produces low rpm torque, and flow produces high rpm horsepower. The cylinder head included in this listing will fit the vehicles listed below. Yes the pistons will need to be dished for the 53cc chambers but I have Comp beehive springs and hope to have good flow #'s when the heads are done. 601 Heads: 1.72"/1.5" or 1.84"/1.5" valves, 53cc chambers 416 Heads: 1.84"/1.5" valves, 58cc chambers I'm not 100% sure but think the runner size is about the same. This head is a great flowing 23 head out-of-the-box that BRODIX offers. The 601 and 416 are supposedly the best of the 305 heads.I believe the 601 combustion chamber is about 55 cc's, the 416 is 58 cc's.On a small bore engine like the 305 they work pretty well and can support about 300 HP with a little clean up work on the ports.The bigger intake valve has a slight advantage at higher rpm's.Some Casting Number 706 and 862. Anyway--this casting # was used on 305 & 267 v-8s ---any ideas what valve sizes are??? Factoring a 4.03 bore and 52% for intake to bore diameter shows that a 2.02 or even larger could be used. Most flow numbers for SD Performance heads come from their Web Site updated May '15. These heads have been completely rebuilt with 16 new thick wall valve guides, a 3 angle valve job, 8 new intake valves, 8 new exhaust valves, & and 16 The bottom-end torque is almost identical to the original engine configuration, so I managed only 2.08 60-foot time. 67 cc / 1.94 intake head is World Products # 4361; 76 cc / 1.94 intake head is World Products # 4360; Head Flow @ .500 Lift 220 intake, 151 exhaust (Super Flow 1050) 232 intake, 161 exhaust (Super Flow 600) All heads flowed with a standard .750" intake plate, without exhaust tube, and 28" of water. Most flow numbers for Scott Johnston heads come from them Web Site updated July '09. The block is a stock 350 bore size---probably 76cc chambers on the head area. Most rework the 416's however, with bigger valves and some port/bowl work. *1 -- These flow numbers come from Chevy High Performance Magazine Data. A decent 383 needs a 180-195 cc intake runner. Actually, the 601 heads have 53cc chambers, the more popular/common 416 are 58 cc. Iron Heads. Heads have been hot tanked, shot blasted, and magnafluxed. Stock Pontiac Head Flow Head Casting Number: Year: Notes: Porting: Intake Lift: Intake Flow: Exhaust Lift: Exhaust Flow: Download Desktop Dyno 2000 .flw file Any thoughts on smaller cube heads used on larger bore blocks. DESCRIPTION. Some 601 castings were used with the 267 V8 and have 1.71" intake valves. These cylinder heads seem to flow A poor short-side radius like on older small-block production heads offers a flat floor where the air and fuel shear off the port floor going into the valve bowl, which creates turbulence and reduces airflow, especially at higher valve lifts. A Look at Some OEM Heads. Rebuilt Sbc 305 Ho # 601 Chevy V-8 Cylinder Heads Chevrolet # 14022601 : $395.0. Cylinder Head Flow Data @ 28 Inches of Water. Thanks Ken! The heads have 53cc combustion chambers with new 1.84 intake and new 1.50 exhaust valves. Same goes for the heads. COMPATIBLE VEHICLES. The 601 is a truck head it has really small chambers maybe too small because theyre tight around the valves it shrouds them pretty bad. (except 1992 & up LT-1 reverse flow). Material: Aluminimum . Actually, the 601 heads have 53cc chambers, the more popular/common 416 are 58 cc. S/R Head Application Chart (GIF) Item Details sources. A small half effort only gets you a small gain. The exhaust port is a unique D-shape that improves flow. F-BIRD'88 got the highest flow numbers of the 083 heads listed but he also says himself that he got consistently higher flow numbers on similar heads, so I included it but I wouldn't assume that his numbers are as representative of the 083s since the other data (especially the alum heads When you think about it--76cc is 76 cc no matter what. List the #s here & I can help out. Up for sale is a professionally rebuilt pair of date matched Small Block Chevy 305 HO cylinder heads. Re: 601 heads with light porting flow numbers Post by mag2555 Mon Dec 02, 2019 11:40 am The arc, or lack of on the long side of the Exh valve bowl around the valve guide as a big influence only a undercut stem pays off across a good range of valve lifts. Porting L31 Vortec Heads. Part Number: 12559862 . Then, in 1997, the third-generation small block was released. i've built/repaired more engines than most. Fig 6-12, the stock L31 head is considerably better than the Fuelie- style heads we find ourselves working with if factory heads are the order-of the- day. The LT4 is substantially different from the LT1 casting, and the flow numbers explain why. The surprise of this test was the Patriot. In response to ORANGE77. Most of these heads had accessory bolt holes and were identified with casting numbers ending in 186 or 492. Some people block the twinned exhaust riser/egr passages in the center exhaust ports to improve flow and stop exhaust port cross talk. My internet access is going to be limited. A poor short-side radius like on older small-block production heads offers a flat floor where the air and fuel shear off the port floor going into the valve bowl, which creates turbulence and reduces airflow, especially at higher valve lifts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! Other than the need for more chamber relieving for larger valves on the 601 head the job is pretty much the same. Thanks. *4 -- These flow numbers come from Edelbrock *5 -- These flow numbers come from Car Craft - Jan 2001 *6 -- From Paul Shufelt *7 -- From Chevy High Performance Feb. 2001 Send me a private email for details on these 882's. Condition: Remanufactured - Exceeds OEM Specifications. My 1st post so thanks in advance for any info. Heads with short double-hump casting marks were used in later high-performance SBCs. I had 2.05/1.60 valve heads on my 355. (I guess MOTOMANWIN has other info than I found) When these heads are used on a 383, it`ll have good torque right off idle but will run out of breath around 3500-4000 rpm due to a lack of air flow above .400 cam lift. Does anyone have an oppinion on putting 305 GM "601" casting # heads on a 350 block. 70 Chevelle 565 t-400 8.87 151 1.21 60' and 3200lbs Sold 3/18, ---any ideas what valve sizes are??? FLOTEK High Performance Cylinder Heads 1712 Read Street, Evansville, IN 47710 Phone: 1-800-270-0095 I Fax: 812-421-0983 The LS7 cylinder head is unique, with identification number 8452. Being a retired Chevy Dealer Tech of 35 yrs. These numbers are derived from flow bench testing, and manufacturers most often advertise airflow at peak lift because these tend to be the highest numbers. I broke out the old book to see if they had been adjusted and they had not been. Engine Size: 5.0L - 305ci - V8. The LS3, LS9 and L92 all use essentially the same cylinder head foundation, featuring a four-digit identification number (top of head just outside the valve cover rail) 5364. VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Most flow numbers for SD Performance heads come from their Web Site updated May '15. Heads. 601 heads were almost always on trucks, had 1.72 intake, 1.50 exhaust valves; same a Power Pack heads. * Flow data for this head from an external source. Most rework the 416's however, with bigger valves and some port/bowl work. No swirl numbers available. The actual CFM flow numbers would depend on if any work was done to the heads, and the quality of the valve job I did read one test on flow #'s for a 461 (stock, untouched), the #'s were as follows: .050" 1-38.9, E-20.9 Head: 1999+ 4.8L / 5.3 Liter Truck . This conversion factor is noted in his book on page 66. 2.055/1.60 Pro Top Line Pro Lightning 200. Description: 80-86 Chevy 5.0L 305ci V8 SBC 601 Cylinder Head. Also the runner size is very small. 55cc exh. The second-generation engine featured aluminum heads, reverse-flow cooling (the heads received coolant first, in lieu of the block), and electronic controls. LS6 heads are the best choice only when all-out power is needed. For instance the 113/L98 head that flowed 182cfm at 25" would have flowed 193cfm at 28",,, which puts his numbers right on par with the others referenced. Description: 80-86 Chevy 5.0L 305ci V8 SBC 601 Cylinder Head. 12561706 Timing set to 8* btdc initial. Year Range: 80-86. These have no Exhaust crossover like 062/906 Vortecs so EGR wont hookup. Patriot. For a better experience, please enable JavaScript in your browser before proceeding. The 601 305 heads will have 57cc and 1.84" intake valves. The -11X requires a special stud girdle and longer pushrods. JavaScript is disabled. Those heads are choking the engine off. All flow numbers for Sabre Heads come from their Web Site. Just bought a 73 SS from Tennessee with a 383 Stroker in it. The flow numbers indicate even more potential with these heads, since the flow numbers peak at 0.600-inch lift and our cam barely cleared the 0.500-inch-lift threshold. Clickable links to all the sources of the info in the above are here in the original post: That took a good bit of effort tying all those together. 601 iron heads: 224 intake; 157 exh (Fast305, 1.84/1.50, 14022601, medium duty truck heads) 350 heads 083 iron L98 head: 209 int; 137 exh (dj I've got a set of rebuilt 1.94" 882's if your interested.
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