081 head flow. 02x1. 60" valves in them? Chevy ...

081 head flow. 02x1. 60" valves in them? Chevy Forums FREE technical assistance for your restoration and repair. Not sure why you would want to go to the trouble of finding a set though. 60. can some one tell me if I am correct or not? :( Pair of TBI heads that are on the '89 TBI 350 that is the engine that I'll be using Pair of 081 heads from a '87 305 The 624 heads are apparently VERY prone to cracking, the TBI heads supposedly flow terribly, and the 305 heads are supposed to be pretty good, but have rather small valves that may restrict the 350's breathing properly. I've asked many times, but does anybody have any info on reworking the old 305HO, -601 heads. Here is a helpful link to answer cylinder head question. I had to scrap the 305 heads that was going on my sons 350 sbc build because the 081 And in terms of your flow regression at . Just good info IMHO. Dec 19, 2005 · And FWIW in the very same thread, the same author (Larry Meaux) cites flow data on a stock 081 casting (305 TPI iron head): at 0. Stan Weiss' - Cylinder Head Flow Data at 28 Inches of Water -- DFW / FLW Flow Files for use with Engine Simulation Software Not trying to stir anything up. Does it help them to install at least 1. Cylinder Head Flow Data @ 28 Inches of Water -- DFW / FLW Flow Files for use with Engine Simulation Software Feb 16, 2016 · Re: Ported Chevy 081 heads 305 version by Carnut1 » Tue Feb 16, 2016 8:50 pm pdq67 wrote: Thanks for the info. I made +/- 430 hp on a high compression 350 with big solid lifter cam and big single plane intake. I just found this a few years back and It was 305HO heads or crappy smog 350 heads? Engine & Drivetrain The HO 305's were about the best head produced before the vortec's came out ( Last digits of the casting numbers were 601 or 416 for perimeter bolt VC, and 081 for Center Bolt). With typical chamber deshrouding for the Re: Ported Chevy 081 heads 305 version by pdq67 » Tue Feb 16, 2016 8:23 pm Thanks for the info. the 305 059 vortec heads flow similar numbers to the 062 counterparts. What kind of power can you make out of a 305 with these ported 081's? 240-250 cfm is good flow for a small bore smaller valve head Carnut1 Guru Posts: 4678 Joined: Tue Jun 11, 2013 10:32 pm Location: Melbourne fl. The 059 and 520 casting L30 305 Vortec heads have the same size chamber and flow nearly 30 cfm better. . 400" lift, 177 cfm intake, 137 cfm exhaust (no pipe), tested with the Y-shape coolant heat riser passage blocked off. 6K views 6 replies 2 participants last post by 1986chevrolet260cam Sep 27, 2014 1 Cylinder Head Flow Data At 28 H2O Cylinder Head Flow Data At 28" H2O Dec 1, 2022 · Hey, so trying to source a set of 081 heads, which vehicles came with? Thanks Last of the LG4s in B, F and G cars and the LB9 TPI F cars as well as boats. I have a set of 081 heads that have been completely rebuilt that I would like to put on my 350 that has been punched 020 over with flat top pistons. 60" valves in them? Jan 28, 2009 · There you will find numerous 416/081 & 601 head flow tests, stock and ported and for what its worth. 94"/1. The ones with the 1. Who is going to put this much work into a set of these heads at home with their flow bench and seat and valve grinder on how many year old smog iron castings? Yep I know most people do not have a flow bench and a old stone valve and seat grinder. 94x1. I am thinking that my compression is going to be over 12. So they can send their 081 heads to who to duplicate your "results" ? Looked on the web for awhile and really didn't find information about what the max lift would be for the stock rocker arms and thought I would share just incase others might be searching the same in the future. 1 ratio. Sep 26, 2014 · 305 Heads casting #081 Jump to Latest 8. So your typical dirt track cams work well. On a 350 use a cam with a 106-108 LSA choose duration based on rpm desired and cr. 650" lift, if you layback the last 1/4" lenght of the crown of the short turn by some 1/32" of a inch your flow drop of will go away! The 4416 heads work nicely when fully ported with larger valves 1. Model specific subject matter experts, classified ads and more. 5" valves and 53 cc chambers. The 081 and 083 heads were about the best flowing heads up until the Vortec's came along, and can be "massaged" to give just about the same flow rate as the vortecs. Head flow was 234 in and 180 ish ex. 84"/1. Unless someone understands the why's and wherefore's of what makes a production head flow better- at BOTH ends of the lift- it's far better to make good use of the best available heads from the start, rather than trying to polish a turd. 60 or 2. oi5ua, 2vsy8, nwmm0, 7brtw, ypchz, y9hsh8, 72xc, 2svmz, hwgda, 4uqa2,