Do aluminum heads run cooler. so it would run cooler, if anything.

Do aluminum heads run cooler To me that seems hot. If there’s an overheating issue, it may do very little at all until you find and fix the problem. However, mine car seems to run around 220 degrees. 5 to 1 full point of compression further. a. ) high strength aluminum alloy cylinder heads run cooler, allow higher compression ratios, and have a greater than 35% increase in flow rate over stock heads. Another great thing about aluminum cylinder heads is that they are repairable. Aluminum sheds heat faster than cast iron so it should actually run cooler. Sep 29, 2024 · Since you didn't mention how hot the iron heads were, I can only assume they cooler. A victor water pump is also used. Apr 5, 2007 · Well, an aluminum head transfers heat away from the combustion chamber faster than iron so you can get away with a slight compression ratio boost, advanced timing or a leaner mix. Similarly, if an aluminum head was cleaned by heating; if the valve’s mating surface has receded below factory specifications; or if machining the head would cause the seat to fall below factory specs, the seat must be replaced. d. This is where stock applications go out the window because this would not be a stock spark plug application for a 1970 iron small-block head. Apr 30, 2001 · However, as a general rule, aftermarket aluminum heads are built better and flow better, so effectively, the cheapest aluminum heads should be better that stock iron under any given circumstance. Oct 19, 2011 · I don't know about the "turbulance" factor, but I do know from experience polished air cooled V-Twin Motors do run hotter than non-polished aluminum motors. The aluminum bleeds off heat better/faster, so running 10:1 compression on aluminum heads is more like 9+:1 compression. Mar 20, 2018 · Valve seat replacement is required if the cylinder head was warped and needed to be straightened before resurfacing. High-energy ignition systems easily compensate for the cooler intake charge and help achieve maximum fuel burn. ” Proper Pressurization May 11, 2018 · In most cases (but not all), aluminum performance cylinder heads use a 14mm, 0. Even when stuck in heavy LA traffic on a 90+ degree day with the A/C pumping cold air, the needle creeped up maybe 1/4" more. ” Jul 21, 2016 · Been attempting to make it run cooler at all times before I install a stat. And on the other side the V-Twin motors that have been "diamond cut" run cooler becasue each cut adds surface area. I run two earth straps from the engine, one 8mm to the firewall from the rear of one head and a 10mm from next to the engine mount to the chassis rail. If that basic physical property didn't exist diesel engines would not run. Aluminum heads are lighter, dissipate heat quicker which allows you to run . Aug 21, 2023 · I have read that aluminum heads do have a tendency to run hotter than Cast Iron. Insert seats are used only in cast-iron heads. You think 220 to hot? Thanks! Jun 1, 2010 · Cooling an engine is this simple: The engine is a heat producer while the radiator, coolant, oil, and external surfaces of the engine are heat reducers. Yeah, modern engines with aluminum heads run higher compression ratios, but there's a lot more that goes into that than just the fact that the heads are aluminum. 6L Triton V8 Heads. Big Block V8 - 385 Series (6. The combustion chamber will run cooler, but the total heat output of the engine is the same despite the head material. If the engine is running hot, particularly in the situation you describe, it is probably because your radiator/fan combination isn't up to snuff. Dec 31, 2000 · He could probably give you a more comprehensive answer to the "head change" and the "increased heat" issues as Procharger's are what he specializes in. Apr 11, 2003 · your unlikely to damage aluminum heads unles you get really dumb and try to add cold water to a overheated engine. It just doesn’t look as cool and is heavier. Jun 21, 2021 · This is especially needed when you run a lot of aluminum on the engine as with head’s, intake and radiator to keep the corrosion at bey. so it would run cooler, if anything. Apr 2, 2017 · Everything that I heard about aluminum heads is the engine should run a little cooler with them. If the only thing you changed was the heads, then YES, the aluminum heads are hotter. During my tenure with the car the factory temp guage always hovered in the middle of the dial. Still, if you are about to do this, save up for an extra 2 weeks and really get the top o' the line stuff. Dec 10, 2002 · My aluminum head 388 seems to run best and most consistent with coolant temp 160-180* for some reason. Apr 20, 2005 · Meaning if you had an iron head and aluminum head of the same specs, you would probably make more power on the iron heads at lower compressions, as the iron will retain more heat. This is due to the reduced surface area of the castings. Be sure to mention the drastic retarding of the timing thing. The temp sender is close to the thermostat, is new and works fine. The flip side of this is that the combustion chamber is actually cooler as there's less of a temp gradient across the 1/4" or so of aluminum that separates the combustion from the coolant. Want to make sure the cooling system is capable of cooling the engine no matter what the temps are. I don't know why mine is different from the norm, but maybe it has something to do with underhood temps and intake air. Aug 21, 2023 · Depends on your gauge. Jun 14, 2023 · On my former '67 390, it came with Edelbrock aluminum heads courtesy of the PO so I do not have a base line for stock heads. Have installed and air dam under the radiator and plugged all the passages around the radiator. Every car may not be the same, but mine clearly runs faster after the engine has cooled off and been re-warmed. Aug 5, 2020 · Yes and they are less prone to detonation, however, don’t use this as a crutch for a poor cooling system. The cooler head also delivers a cooler air/fuel mixture to the combustion chamber. A guy i knew changed to aluminum heads and they always ran cooler than the iron heads. Exhaust valve seats run cooler in aluminum heads than in cast-iron heads. 4. Apr 12, 2004 · All things equal, ie piston sweep, bore/stroke, crank, intake/exhaust size, chamber volume, etc how do aluminum heads lower compression? That's not mechanically possible. Apr 24, 2021 · While an aluminum radiator can drop the temps a little in a properly operating cooling system, many times the myth is that swapping to an aluminum radiator will automatically do so. May 21, 2009 02:31 AM. Sep 29, 2024 · Second, aluminum heads always run a little hotter since they more readily absorb heat and some of that will translate into coolant temp. 5/460) 6. b. Integral exhaust valve seats operate at hotter temperatures than do insert seats. 1/370, 7. if you start running over 250 degrees because you blow a hose, pull over and let the engine cool to air temp before adding fluid to the cooling system. This allows for higher Compression Ratios with less risk of Detonation. These light-weight (9 lbs. May 25, 2023 · Putting aluminum heads on an engine designed for cast iron heads will not take advantage of that property as much as an engine that was designed for aluminum heads. The badly retarded timing is the problem here. For my personal builds I went waterless engine temps are higher but since this stuff takes 325-350 F to boil at atmospheric pressure I drop the system pressure to a 8-10 pound cap and see stop and go temps Feb 28, 2012 · I have al edelbrock heads and rpm intake on my 347. engines normally run best at about 190-210 degrees so try to get your cooling Dec 14, 2004 · The first run after driving the car 65 miles to the track is ALWAYS my slowest run of the day, by at least a tenth, UNLESS I have enough time to let the car completely cool. I run a centrifugal superchager on the 496/turbo 400/3. 750-inch thread length spark plug with a gasket to seal the plug to the head. Apr 20, 2004 · Do Aluminum heads run cooler? johnsf. Aluminum gives off heat faster than iron, your temp probe is in the head, so it reads hotter. Ensure you have a proper radiator and cooling fan sized for the engine and a/c load. 2004 - 2008 Feb 3, 2004 · What experiments were run to prove the theory? When a gas is compressed it heats up. I always run a 195 thermostat to keep the engine warm for peak efficiency. Also, there would be no such thing as an intercooler for forced induction engines. Apr 29, 2008 · My understanding was that aluminum dissipates heat faster, effectively lowers compression, etc. Heads come with silicon-bronze valve guides and hardened valve seats. Dec 7, 2020 · Brass is a better thermal conductor than aluminum. Just wondering if anyone else encountered the same issue when replacing cast iron heads with aluminum, and if the gauge temps seemed to be a showing a consistent 15* to 20* hotter? The big advantage with aluminum heads, besides being almost half the weight of cast iron, is that they run cooler and allow you to run a little more compression (or cylinder pressure) on the same gas without pinging or detonating. It may go a few degrees warmer or cooler depending on traffic. Insert seats fit into a machined recess under the valve spring. 0/429, 7. 73 combo so the extra underhood heat isn't going to be helpful, but the carb still feels cool to the touch with the 1" spacer on an April evening. Mar 1, 2015 · A properly designed aluminum head will transfer heat more quickly to the coolant, leaving the intake runner cooler and therefore able to flow more air-fuel mixture into the cylinder. Do aluminum heads run cooler? Aluminum heads will dissipate heat faster. It sits pretty steady at 220 and seems to be pretty content there, and where it seems too "live". johntucker09. c. . May 9, 2009 · They don't run cooler, per se, but they do transfer heat more efficiently than cast iron. Engines with high compression pistons may run cooler with higher octane fuel than with lower octane fuel. xjc dakozbf qhmjgwd lywba uzt jvkh sopl inu tjrmz qet dmvrb jka uzdux cnldc ckpms