601 heads specs. They will,however,require a Vortec specific intake.

601 heads specs. 040 over block. Feb 5, 2006 · 416 is the so called HO head has the same 1. Jan 2, 2011 · 416 or 601 heads? Which is the better one? (for my 307). 84 size in the rusty one The 1. 84 valves. If you keep the 1. I believe the 601 combustion chamber is about 55 cc's, the 416 is 58 cc's. I will make corrections if you PM me. Oct 9, 2024 · Recommendations? I have decided to put new cylinder heads on the Malibu but I am exhausted from reading about all the stats, additional parts needed for this one or that one, reviews, etc. 84 intake valves you do not need to unshroud as far as the 1. The bigger intake valve has a slight advantage at higher rpm's. Oct 26, 2012 · Does anyone have information on the runner size for these heads and what are the upper rpm limits where they run out? I believe they have 1. I've read lots of posts but some say 416's and some say 601's. I have a pair of '416 HO heads I'm getting ready to do the same thing to for my '66 C10. Dec 2, 2019 · This is a set of 601 casting 305 heads I've been dragging around with me forever. 0L 305 Cylinder Head 601 Assembly Genuine OEM 14022601 bishopengine (13525) 99. I am in the process of a port & polish job on the heads and will be building a 4 bolt . 50 exhaust valves the same a Power Pack heads or 1. The upscale is fastburn Vortechs which require a different intake manifold. 5 valves. The chambers & ports are much better. Sep 3, 2021 · I swapped in another 350 SBC I had with ported 601 heads and 268H on a 112 LSA but these heads got the pushrod pinch opened up a lot and I roughed up the intake runners. I had 200 CC IEs on it and switched to these, the smaller ports and chambers Dec 27, 2009 · Thanks for the report. 84-1. You`ll also need a custom chip as the better flowing heads will likely Nov 3, 2009 · I Found A Set Of 601 Casting 305 Heads And Waswondering If I Could Use Them In Sted Of 416 Casting That Everyone Has Told Me To Use To Bring My Compression Up Please Help Chevrolet Small Block Heads Casting Numbers, Information and Specification. Stock 1. 50 valves, 56cc chambers, amateur hour light bowl blend and general port cleanup, single angle 45* valve job. The cylinders being so small on 305' and 307's, valves and chambers of other heads became shrouded and actually hurt performance. 50 and went 11. It's a mild build with specs as follows: 1) 601 heads with some pocket porting and 1. They are a much better flowing & performing head than the #416 head, or, the #601 4 bbl heads. Aug 15, 2011 · Hi--I'm building a 305. --- Stock May 23, 2006 · so what you are saying is that the 601 casting heads are actually pretty good on a small motor what do u think bout this combination with those 601 heads its a . 2% positive Mar 22, 2016 · The best OEM iron head,IMO,would be a set 96/2000 L30/305 heads. The 291's are currently on my 350 which has flat tops. 030 over 4 bolt main 350 with stock rods fordged flat tops scat crank and a comp 268 cam (not sure of cam specs) this motor is for a street driver or toy. Need to do some touch up on them then assemble and Apr 17, 2025 · 87-95 Chevrolet Original Heads 5. Power wise theyre probably the about same, one gives you a little more compression and the other flows a little better. 5 exhaust 58cc 2) Comp Cams Extreme Energy 262 hydraulic flat tappet . 84" valve. 50) 601 and the 441X head unported but with 3 angle valve job. However, 062 has slightly larger valves than 906 Vortec Heads. 94. It is also important to review/confirm the fitment notes above to ensure the vehicle specifics of the head are correct for your application. The 601 and 416 are supposedly the best of the 305 heads. Lastly I have a set of 305 HO 601 heads with 1. 60) in them. The cylinder head included in this listing will fit the vehicles listed below. You need to blend the unshrouded cut in the chamber that was done by the factory. 84 valves and very small chambers like 52 or 53 cc's, but they seem to be all over the place. Gained 1000 rpm over the X head for optimum shift point. I believe in attribution so I have documented where all this data came from, and who the original author was, to my best ability. Most rework the 416's however, with bigger valves and some port/bowl work. Yes the pistons will need to be dished for the 53cc chambers but I have Comp beehive springs and hope to The Complete Cylinder Head Guide for Chevy Small Block Engines- How to Build Max Performance Chevy Small Blocks on a Budget Dec 19, 2005 · TBI - TBI and TPI heads: headflow data - The following is my post from the garage ported 193 head casting thread from 4/05. 94-1. Generally, if the cylinder head was designed for street applications larger valves will not … Continue reading → Nov 26, 2008 · Does anyone have an oppinion on putting 305 GM "601" casting # heads on a 350 block. 94 valves and the 76cc chambers. 50 exhaust valves; same a Power Pack heads. If you keep the TBI then you`ll have to either order a aftermarket intake that has the correct bolt angle as the 4 center bolts on TBI`s are at a different angle than the older 601 heads are. Valve Size, Air Flow and Performance Will installing larger valves improve the performance of the cylinder head? Answer: It depends on the type of cylinder head. 94@ 117 in the 1/4 in a 350 with a 292H in a 78 nova Oct 31, 2009 · 1. 55 valves (turned down 1. 94 x 1. Here is a quick comparison chart highlighting the significant specifications of 906 and […]. 601 heads were almost always on trucks, had 1. May 9, 2013 · Re: 601 heads by jeff swisher » Fri May 10, 2013 3:53 pm I really love the 601 heads. They will, however, require a Vortec I used 416's and 601's on NHRA/IHRA Stock Eliminator builds. 5 valves as 601 casting but larger chamber, actually same chamber they used on all early 305 heads. it has been my favorite for the last 10 years or so. Jul 11, 2005 · These heads also have 1. The Chevrolet Small Block was introduced in 1955 May 12, 2010 · Wow definitely some interest and difference of opinions on the ole 305 HO heads! The timing couldnt be more perfect for this experiment, as im building a LOW buck smallblock for project 'bottom dollar'- a 75 Monza coupe drag car for the family, buddies and myself to thrash on when we feel the Feb 16, 2016 · I used the 283 numbers matching heads and put 1. 0L V8 305 Cylinder Set SBC Casting GM 14102187 Mar 10, 2014 · These heads run extremely well . Next in line would the 305 HO heads,#4416. 72 intake, 1. 50 and 1. For any real high performance tho,the #4416 & #601 heads would need port work. . Blend all sharp edges of the chamber after surfacing just a bit. It is around 10-1 cr. So I left that size. When running the heads I have the HO 305 was a car head 601 casting and all measured 53. 94 intake and 1. It made a sweet running engine and looked and matched all the 66 El Camino casting numbers & date codes. 5cc chamber and after porting and working the chambers over the runners end up at 170-175cc The chambers end up at 57 cc for a minimum with 1. While 906 and 062 Vortec Heads share some similarities, there are also some notable differences. Jan 28, 2008 · A couple of before and after pictures of the 601's I am about to stick on a 385" These I had enlarged the intake to 1. I have used the 1. I've heard these are actually descent heads and they flow ok considering they are off a 305. Jun 14, 2017 · I finally got the last of the tuning issues cleared up, and the 601 heads are working great. Some guys use the small Mar 13, 2017 · Actually, the 601 heads have 53cc chambers. The history of the project is in another thread in the Engine section, but the upshot is they are doing everything I wanted. Even ported to the max, the 416's can't compare with L30 heads in stock form. Anybody KNOW the real truth? And I don't want to know why I need a 350. They will,however,require a Vortec specific intake. some 220 grit wrapped around your finger will be enough. 50 exhaust valve has served me well in many engines . 94 from the 1. Sep 4, 2010 · Actually, the 601 heads have 53cc chambers, the more popular/common 416 are 58 cc. 84 and 1. 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. I have done back to back tests with ported small valve (1. 60 valves. He has mentioned that the 416's are often cleaner castings than the 601's. They work well on the 283/307. The #601 305 heads are decent as well. Who has replaced the heads? What heads did you go with? I am looking for no modifications; slap the heads May 12, 2023 · The 906 and 062 Vortec heads are two popular cylinder head options used in small-block Chevy engines. A guy at another forum I frequent is a bit of a 305 guru and does a lot of work on the '416 and '601 heads. 84/1. 469 lift 218/224 duration 110 degree lobe seperation 3) Jegs long tube headers + 2101 Apr 17, 2025 · GM Chevrolet GMC 5. Dec 18, 2016 · If power is the goal in your build, you will be far better off with a set of L30 305 Vortec heads. Jan 19, 2011 · Likely so, as the swirl port heads that are on it are awful flow wise. Some will drill the stock intake but I don`t recommend this. With a little elbow grease they are both great heads for a small displacement engine or a 350 low RPM May 7, 2011 · 416's and 601's (early/mid 80's 305 heads) are about as close to a performance head as you'll get on a production car from that era (the other heads used on 350's were pretty much junk, even the vette aluminum heads aren't significantly better), and can also be used well in a high efficiency, low end/mpg setup with good effect. FWIW, HTH. vnsp 9fkmy wm95 v3qqxc pd pxyg pw6 gvgyh eq oylanhpbm