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Hey Scott, The way you explained that was very enlightening. I never even thought about the over kill factor and never realized that putting a set of aluminium heads on a street application would be a waste of money. I guess it's true, you really do learn something new every day. Especially if you have alzheimer's. Date: Tue, 2 Apr 2013 08:15:20 -0400 Subject: Re: Need new heads From: penstarperformance@xxxxxxxxx To: 1962to1965mopars@xxxxxxxxxxxxxxxx Every head is designed to flow a given amount to max out the port to flow to get the max performance for a given application,and RPM range.Valves and port volume are matched to that application.Can a person put on a set of alley heads and go faster,YES,but only to a point.If the head being used, is designed for very large cam lifts, and large cube motors,500+cubes for all alley heads,the heads can be a great benefit. Putting them on a small motor,a 440 with a small cam,.550 lift and less,you never get to see the full benefit of the head.Will the car start and run,YES,and will go decent,but will not get the full use of the performance it has.This is why.The alley head is design to have lifts of .600-.700 cam lifts,great,but if you only install a 550 lift cam,you loose 30-35% of what the head can do,and that none performance of not haveing that extra lift starts to kill carb signal under the carb.The port volume?If a port is small on a large motor(440) it has a great signal,up to a point in the rpm and then its maxed out,it can,t flow no more,a larger valve will pull great numbers in the upper rpm but not in the lower ones.The balance is a correct valve size and port size.The problem with the alley heads is the port volume and valve size,most are the 2.19 intakes and the port volume is 230cc and some more,which is way to much for a 440,a 500+ motor,go for it right away.A normal ratio for figuring a proper port is about a 18-20% of the cylinder bore is a great start for a port volume.When to big of a cam and to big of a cylinder head are installed on a small bore motor,it only runs and pulls at high rpm,which is not 440,the 440 run and make great power to 6500 for mild builds,a full race unit 7500-8000(25-30 grand motor).A super stock 440 E body drag car runs in the 9,s at full weight and all kinds of rulers for the motor,and allot of stock parts,just imagine what a person can do with that motor and NO rules.This car also has to run,get this,stock heads,and valve size,with SOME mods,and is inspected if that racer wins a catagory or meet. Now if you intend to go big cubes,i will be the first to tell you to buy the alley heads,as the cast iron heads will fall short,but if you are staying with a stock bore size and under the 500 cube mark,a set of fully ported and bowl worked and stock valve size head is the way to go.I have a few sets of 452 heads all done and a set of 452 heads done with MAX WEDGE size ports and they work and flow better than a eddy head.I have the pics and numbers to prove it too,still use a stock valve size!!!Mrmopartech 450 424 0445/514 659 0445 penstarperformance@xxxxxxxxx
On Mon, Apr 1, 2013 at 11:36 PM, Cory Rempel <cory_383@xxxxxxxxxxx> wrote:
-- -- -- Please address private email -- email of interest to only one person -- directly to that person. That is, email your parts/car transactions and negotiations, as well as other personal messages, only to the intended recipient. Do not just press "reply" and send your email to everyone using the general '62-'65 Clubhouse public email address. This practice will protect your privacy, reduce the total volume of mail and fine-tune the content signal to Mopar topic. Thanks! 1962 to 1965 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html. -- You received this message because you are subscribed to the Google Groups "The 1962 to 1965 Mopar Mail List Clubhouse" group. http://groups.google.com/group/1962to1965mopars?hl=en. --- You received this message because you are subscribed to the Google Groups "The 1962 to 1965 Mopar Mail List Clubhouse" group. To unsubscribe from this group and stop receiving emails from it, send an email to 1962to1965mopars+unsubscribe@xxxxxxxxxxxxxxxxx For more options, visit https://groups.google.com/groups/opt_out. -- -- Please address private email -- email of interest to only one person -- directly to that person. That is, email your parts/car transactions and negotiations, as well as other personal messages, only to the intended recipient. Do not just press "reply" and send your email to everyone using the general '62-'65 Clubhouse public email address. This practice will protect your privacy, reduce the total volume of mail and fine-tune the content signal to Mopar topic. Thanks! 1962 to 1965 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html. -- You received this message because you are subscribed to the Google Groups "The 1962 to 1965 Mopar Mail List Clubhouse" group. http://groups.google.com/group/1962to1965mopars?hl=en. --- You received this message because you are subscribed to the Google Groups "The 1962 to 1965 Mopar Mail List Clubhouse" group. To unsubscribe from this group and stop receiving emails from it, send an email to 1962to1965mopars+unsubscribe@xxxxxxxxxxxxxxxxx For more options, visit https://groups.google.com/groups/opt_out. |
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