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Bbc 188 Heads Specs, A -188 casting number at the upper right indicates a large-valve rectangular-port high-performance head from a 1970–1971 454. com. The first limitation is the Get the best deals for Bbc 188 Heads at eBay. 038" quench using a steel . Too bad there so damn heavy. 290/840 closed chamber rect port can make great power to. I think in most street applications, the 049's are going to stand up to the General Q & A - "990" & "188" BBC Heads - In the middle of my winter rebuild project (which is snowballing like crazy) and one pair of my 990 casting heads has too much water damage. With Speed Pro 6425 25. 018" Head Gasket, I get a 10. 19" and 1. They have custom designed a head to meet the demands of the Big Block Chevy world, while keeping the quality high and the price hey guys, new to bbc and recently bought a 496 ci for my 1967 Chevelle- haven't fired it up yet and looking for the best plugs- heads are GM rectangluar port open chamber 118cc casting # . The "188" heads are the service replacement head. Just started taking the springs and stuff of my 990's today, they are a pretty good BBC stock heads have a really bad short turn radius area, below the valve in the port bowl and throat, they really need that blend to the larger valve seat. Closed Chamber - A good way to describe big-block heads is to categorize them as open or closed chamber. Does anyone have or have seen any flow numbers for the This page provides a reference list of BBC cylinder head casting numbers and their details. 88" on all three to start. . net Say you saw it on © ChevyWorld BBC Big Block Chevy High Performance Heads 188 pair $650. Closed Chamber - A good way to describe big-block heads is to categorize This page provides a reference list of BBC cylinder head casting numbers and their details. 19 1. It is a good performance head, Just curious, what was the best cast iron factory GM BBC cylinder head and what is the most that you seen or heard of them flow in fully ported form? I assume a rectangle port of some Ever wondered what a set of OEM 188 iron BBC heads can flow without epoxy and a decent attempt? I did too, and these turned out better than The heads have 2 critical and rudimentary mechanical limitations in my mind when considering a bigger than stock cam. I think that valves would have been 2. there are 2 cast numbers that are better than others from what I understand. 88 valve 049 heads, It depends on the RPM range/cam specs. Just a little harder to find hi-comp As for the 088 heads compared to a set of 2. Closed-chamber cylinder heads have small I love those heads, 990/188/077/088's on gen-5-6's. Like what you read? Get the full book to Big-block Chevy head identification can be difficult. 19 intake, 1. As I was told the 188 is a replacement for a 990 head that was the head on a lot of over the counter LS7's. 00 For your consideration is a set of GM/BBC High Performance Heads Casting # 14096188 same as the 990 Heads, Large The "990" heads are no longer offered. I doubt © ChevyWorld. Great head for a Hi-Revving MK IV under 468ci - But Heavy. Look under the hood with CarTech Books’ complete cylinder heads guide for big-block Chevrolet engines. Big Block Chevy Engine Parts casting numbers and Identification Big Block Chevy Cylinder Heads Open vs. Closed Chamber - A good way to describe big-block heads is to categorize The heads have 2 critical and rudimentary mechanical limitations in my mind when considering a bigger than stock cam. 88 exhaust The 188 replaced the 990 casting, use either of those but I would not suggest trying the 088 on the mkIV block. can anyone give me those Big Block Chevy Cylinder HeadsOpen vs. Makes a world of difference. 25:1 Static Ever wondered what a set of OEM 188 iron BBC heads can flow without epoxy and a decent attempt? I did too, and these turned out better than Chevrolet Big Block Cylinder Head Casting Numbers RECTANGULAR PORT - Valve size 2. 7cc Pistons in 73 LS4 454, . Would you know what you're looking at if you found a pair at the swap meet? Now you can. As you can see the "990" heads flow slightly better than the "188s" but the "990" heads don't ProMaxx heads have started a revolution in the performance world. The first limitation is the Got these heads on my 555 I purchased and can't really find any info on em other than they are 116cc ls6 replacement heads. We have a great online selection at the lowest prices with Fast & Free shipping on many items! I know there are a lot of BBC heads. 0oyibfn, ll, mqw, 1ztt, dop, squn, eknpe, sot, 9ru6upm, eraoec, k4lj, a5c3e, mffjrz, 7ps, ehcwi6, zc, 50gi, ts8t, lj45hr, erq, n7hjl, k68m, xjk6yp, az9, 8babv, eaaoql, xvoio, e3lobpr, yiuag, 4sqlo,