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The current king is the Apache head that is reported to flow more than 340 cfm. Putting a 100 CFM head on an engine you run at 7000-7500 RPm isnt going to gain you anything.
Weve been playing with the heads on the eBay 57L Hemi that we are currently plumbing into the 71 Demon project car.
Flow numbers for hemi apache heads. 7 Feb 28 2012 Edited Flow also determined by valve lift. I think the tallest bump stick we can stuff in the motor is 700. Due to cam bearing and valve train geometry.
Flow speed is another consideration. All that info can be had from a Master Engine Builder. 1 - 7 of 7 Posts.
Our SuperTune Ported 57 HEMI Heads flow like Mopars coveted Apache Head flowing more than 340 cfm 600 lift and nice fat numbers at lower lift levels as well. It makes for performance gains youll see on the dyno and feel on the street at the track and every time. Although flow numbers are not he most important aspect to a great cylinder head it is important.
Our ports flow the appropriate amount of air designed for the application. We focused on proper Cross-Sectional Area CSA and quality airflow. We have no desire to sell our cylinder heads based on silly flow numbers that any company or individual can falsify.
Every flow bench is different and like weve said a. Jun 6 2016. I would agree 80-85 CFM should put a stock bore and stroke at max VE around 7000-7500 RPM.
IMO you should design your port based off your desired power band. Putting a 100 CFM head on an engine you run at 7000-7500 RPm isnt going to gain you anything. Youll lower your VE at that RPM band.
Ported 64L Heads Apache Rule of thumb states that you can double the cfm flow of the intake port on. A cylinder head and that becomes the most peak hp the cylinder head can. In this case these heads should support 750 crank hp with a 650.
Lift camshaft and the appropriate supporting mods. This is far from a. Ladds Porting Service probably can give you flow numbers on any hemi head.
If you need to purchase new head bolts and gaskets just let us know at the time of purchase. Please call us at 888-894-1115 for more info regarding this package and what you will need to successfully complete the transformation of your vehicle into one of the baddest vehicles the HEMI world has ever seen. 1—Head Flow Charts Comparisons.
There are enough flow numbers on our website to keep everyone busy for a while. The numbers are from our in-house flow bench. We now have a SAENZ model 680 flow bench which we all enjoy using.
It has all the bells and whistles and even gives us information that we didnt even ask for. Chrysler 392 64 Apache Hemi Tuning All you need to know about tuning the Chrysler 392 Apache Hemi engine The Chrysler 392 Apache Hemi are fantastic project engines and with a few sensible uprated tuning mods like remapping turbo kits and. As cams got bigger the beehive springs got more aggressive and capable of handling more lift.
The current king is the Apache head that is reported to flow more than 340 cfm. Weve been playing with the heads on the eBay 57L Hemi that we are currently plumbing into the 71 Demon project car. Flow numbers for the 64 Apache heads are said to reach 340 cfm a big number even for ported 57 heads as our ported early castings from Total Engine Airflow TEA checked in at 329 cfm.
Our 11-17 64L Apache heads are CNC machined and handblended to perfection. The valve seats are put through 109 point CNC valve job. Available in Bare and Assembled.
CNC Ported and Valve Jobbed Casting. CNC Ported and Valve Jobbed Casting. Stainless Intake and Exhaust Valves.
Triple Groove Hardened Locks. Valve Springs 650 lift. The 61 Hemi head is found only on SRT-8equipped passenger cars and trucks.
It uses a square intake port that measures around 188cc and flows 321 cfm at 0600 lift using a 208-inch valve. A recent article in Mopar enthusiast December 2009 issue has a very candid article on Dave Dudekss 69 Hemi Roadrunner set up for FAST. Mid 10s 3700 lbs on F70-15 bias ply street tires.
The article says his production iron heads flow 415 cfm CNC ported by Modern cylinder head non proprietary configuration. The flow numbers for Modern Cylinder Head were from a number of different sources their Web Site updated Nov. All flow numbers for MORGO Systems come from them Updated Sept.
13 and were converted from 10 to 28. Flow numbers are around 320 cfm which is a substantial improvement over the earlier versions. The valves on these heads also expanded in overall length slightly to.
We ran ported Apache vs. Ported Eagle heads and determined it would be worth the upgrade to the Apache head on a 57 displacement. The conventional wisdom at that time said the 57 would run slower ET vsthe Eagle head.
We improved our ET by 020 with the change. We used Craigs flow numbers on the Thitek heads on the 426 design. Our CNC machining of your cylinder heads will include tear down cleaning and inspection CNC porting milling and re-assembly of customer-supplied cylinder heads.
The end result is the best CNC ported factory cylinder heads for your 64L Hemi. Dyno gains of over 30 HP have been seen in back-to-back testing. 64L Hemi cylinder heads Features.
Randy bring your Boss 429 hemi heads when you come up for the BB. Well put them on display for the Cylinder Head Seminar. Jon Kaases going to discuss the Hemi stuff along with his P-51 head during the seminar.
Then plan on leaving the heads. 62L Hellcat CNC Ported Heads. 64L 392 HEMI CNC Ported Heads.
Relying upon over 40 years of HEMI experience as it applies to drag racing and other competitive automotive sports our heads are sure to exceed your expectations. In addition to the three chamber sizes and designs there are four different size intake valve options on the complete heads ranging from 2080-inch valve that flows 370-plus CFM on the small end to a 2200-inch valve that flows more than 410 CFM. Compared to the 392 Apache head the 64L HEMI Big Gas cylinder head looks very similar but the these heads are cast using specific tooling designed for heavy duty application.
The Apache head is a 319 alloy while the HEMI Big Gas head is a premium heat-treated 356-T6 alloy giving it higher thermal conductivity and improved elongation one of the measures of an alloys strength. We Take A Hard Look At Dodges Paradigm-Shifting 707hp Hellcat Hemi. Compared to the 392 Apache head the Hellcat head looks very similar.
Nevertheless the Hellcat heads are cast at a specialty low-volume foundry using Hellcat-specific tooling. The Apache is a 319 alloy while the Hellcat is a premium heat-treated 356-T6 alloy giving it. Developed under code name Apache this Gen.
III version first appeared in 2011 and offers increased displacement and power over the previous 61L Hemi with a longer stroke. This engine also carries the BGE casting mark on the block that stands for Big Gas Engine that is used in a number of different vehicles from the Dodge Challenger to. My choices are 61 heads with cnc porting and psi springs.
Next choice is Apache heads with just psi springs because Ive read they out flow a ported 61 head but I also heard they cant handle high boost because there to thin in the chamber. If i spend anymore than 2500 I rather just put that money toward Thitek heads.