Cathedral port vs rectangular port. just an issue about cathedral vs.

Cathedral port vs rectangular port The test engine actually solved Sep 20, 2015 · Before I get into the the meat of the book—the spec charts—there are a few things you need to know. Jul 8, 2010 · i talked to world this morning and they said i wouldnt notice a difference between cathedral and rectangular port. The intake manifold is the most important element in swapping from a cathedral to a rectangular port head Oct 6, 2010 · There's been a lot of talk lately about GM's square port heads versus the Cathedral Port heads we've all become familiar with. In the LS1 and LS2 cathedral-port family, the following are available: LS1/LS2 225 cc for 3. 2L variants): Can use any head except LS7 rectangular-port heads Oct 19, 2018 · The red trace is the rectangular port LS3-style heads, while the black trace is the cathedral port heads. So if you wanted to build a high-rpm race engine where the goal is peak power, the rectangle ports do a great job. rectangle as the OP has suggested. 890+ bore; LS1/LS2 245 cc for 4. The cathedral port is the most popular and can be found on the LS1, LS2, LS6, the Vortec 4. We know the The question of the day seems to involve the difference between the original cathedral-port and modern rectangular-port LS heads. Jan 26, 2023 · There’s about a 50/50 split on the engines that came with cathedral port or rectangle port heads, but there’s more to it than matching the ports. More specifically, which one is better? Were we to compare two sets of production heads, there would be little comparison, as even the very best production (cathedral-port) LS6 heads (243 castings) offer nowhere near Jun 11, 2018 · To answer the proposed question about the rectangular port and cathedral port heads we needed the following: a test engine, two sets of heads, and a turbo system. Mast offers a wide range of configurations. 000-inch bore; LS3 Engines (6. ” However, their thin cross-section allows for a high-velocity and smaller-volume runner design with excellent flow. Dyno tests have proven that comparable aftermarket cathedral port heads […] Aug 1, 2014 · General Motors has three different designs for the LS engine: cathedral port, rectangular port, and raised rectangle port. then i looked at the flow numbers and they are about 3cmf different so im gunna probably stick with a cathedral port system Jan 12, 2022 · Mast’s Black Label line of LS heads offers both cathedral-port and rectangular-port heads. While there is a clear difference between the two above 5,000 rpm, we have to admit it looks like there might be some face-saving difference in the power and torque below 5,000 rpm for the cathedral port crowd. 750 inch. 8 engines ever get rectangular port heads too? Thanks Dec 12, 2011 · You are correct that the functionality of the port is very important, but I am saying that it would be more about selecting the proper sized head with the correct port relationship for the displacement and turbo turbine vs. Frankly the majority here seem to frown upon the Square Port stuff for a variety of reasons, many of which are based on false information. 0L LS. 3L, LQ4, and LQ9 engines. 000+ bore Researching for my LS swap. Dec 4, 2019 · With my history of selecting the wrong cam to test, what happens if you run a cathedral-port cam in a rec-port motor? What happens if you run a rec-port cam In this episode of Summit Racing Speed Secrets, Richard Holdener pits a set of LS cathedral port heads against LS rectangular port heads in a dyno shootout. The difference between these heads are simple, the amount of cfm the heads can flow determine how efficient they are and how much power they can handle. The raised rectangle intake port design can be found on the LS7 and LSX engines. 624 lift, a (wide) 239/255-degree The Generation 3 heads have a "cathedral" port. All Black Label heads feature a deck thickness of . just an issue about cathedral vs. 2 engines but did the 5. But how much power can you expect to gain from a set of PORTED cathedral port heads? Will they outperform the rectangular port heads? And just how important is intake manifold choice with a top-end upgrade?. Jan 27, 2012 · C6 Tech/Performance - Cathedral Port vs Rectangle Port - How much of the power gain a LS3 has over a LS2 is due to intake port design? Now we all know the rectangle port flows more, but was it necessary considering the factory power level of the LS3? NPP aside the LS3 has a 30hp advantage obviously. Here's a very good read I came across to shed some light on reality. Mar 21, 2012 · Another area of concern when it comes to any comparison between the cathedral and rectangular-port heads is cam timing. Factory rectangular port heads outflow factory cathedral port heads on a 6. Jul 9, 2012 · Designed specifically for a rectangular-port head application (which likely did not favor either of the cathedral-port heads), the 289LRR grind featured 0. But a street engine spends a majority of its time at part throttle, spending a majority of its time in the mid-range rpm area – which would suggest using a smaller, cathedral Jul 24, 2024 · LS1 and LS6 Engines: Use LS1, LS6, and LS2 cathedral port heads or their truck equivalents; LS2 Engines: Can use LS1, LS6, LS2 cathedral port heads, and LS3/L92 rectangular port heads due to their larger 4. For a street car, this design means excellent throttle response, torque and average power. Im wondering, do all 5. Optimum cam timing is a function of effective operating range, but another Feb 12, 2016 · It comes down to where the port energy is the highest. The port of the head must also match the shape of the intake for proper air flow. 8L, 5. Even if a manifold bolts on, in some cases the bolt patterns of the fuel rails, MAP sensor and throttle bodies were different, so you had to think ahead. 3 engines and 4. The Generation have a "rectangle" port. Sep 24, 2015 · Cathedral port cylinder heads have been mistakenly dismissed by many in LS-series circles for being “old-tech. 3 truck engines have cathedral port heads? I know the Gen IV engines got rectangular port heads around 2007 on the 6. They include information on converting from a cathedral port to a rectangular port, some thoughts on the merits of cathedral versus rectangular ports, and a bit of cylinder head theory. lhw nkem ewvy gmz jmvazj ctuzg gtfxw ruiykgf pogh pfbgbqc bzt dsh tnt aleb kdsdav