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#21
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Kinslers old Heads flow better numbers then that on the exhaust.... besides ports that size must be lazy...
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#22
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TO LATE!
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If you cant drive from gas pump to gas pump across the map, its not a street car. http://s207.photobucket.com/albums/b...hop/?start=100 |
#23
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you drinking today?
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540 c.i. Ultra Street Combo Tiger Heads with Tiger Intake Induction Solutions fogger with .046 jet First ultra street/ultimate street NOS car to get into the 4's! 1.079 4.559 153.23. 3100 lbs 7.77 @ 169 1/4 Mile (2015) with EHTTFMF!! T2TTFMF! Special Thanks to: Ron at Rhodes Custom Auto Butler Peformance Jim Hostler's Transmissions (HOSGTO) on here Induction Solutions BES Racing Engines. Cheeseburger VP Racing Fuels Calvert Racing |
#24
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Quote:
I think that the plug location shown looks a heck of a lot better than the PP head. Havent seen a cut away or raw casting to say with 100% certainty. The plug boss doesnt seem to be hugging the exhaust port wall as tightly and appears to be somewhat better retracted from the exhaust valve. The plug shell's job isnt just a place to put threads... it has to be able to pull heat away. The tip itself is exposed to pretty much the same temp during combustion, its the ability to pull heat(heat range) that counts. The exhaust side of the chamber itself is hotter than the intake side. It sees both combustion heat and exhaust heat. The intake side sees more or less same combustion temp at plug tip but is cooler there, due to intake charge being cooler. The closer the plug boss hugs the exhaust port the harder it becomes to cool the plug. Would this head be better if the plug was on the colder side of the chamber? Probably, if you got the room to do so and not wash the tip with fuel. The tip certainly can face the exhaust valve area. We wouldnt have heat ranges if all this stuff didnt matter. FWIW In identical spark plug types, the difference from one full heat range to the next is the ability to remove 70°C to 100°C from the combustion chamber. (Thats 158 - 212 F for those that want to know) Plenty of plug info here... http://www.ngk.com/search_char.asp?s...nufacturerID=1 When coldest plug isnt cold enough you have to reduce temperature.(lower compression or richen mixture or reduce advance or additional cooling capacity or any combination of those) That costs you horsepower. Ignoring it can cost you a motor. Last edited by BruceWilkie; 05-22-2012 at 07:46 PM. |
#25
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take the hairdryers off that inverted fiberglass kiddie pool and i think i could take you in my Goat street car. I bet it would only run a high 8 on motor.
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1963 Cat SD Clone (old school) streeter 1964 GTO post coupe, tripower, 4speed (build) 1965 GTO 389 tripower, 4 speed, driver 1966 GTO dragcar 1966 GTO Ragtop 1969 Tempest ET clone street/strip 1969 GTO Judge RA lll, auto 1969 GTO limelight Conv. 4speed go and show (sold) 1970 GP SSJ 1970 GTO barn find..TLB…390 horse?….yeh, 390 1972 GTO 455 HO, 4 speed, (build) 1973 Grand Safari wagon, 700hp stoplight sleeper 525ci DCI & 609ci LM V head builds |
#26
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OTRTTF works fine.
Curt, I don't think you've attended many oval track races if you think that. Granted JCs car isn't a sprintcar, it's a modified, however Sprintcars top 150 on a half mile track on dirt. 1375# with driver and close to 900 HP, 1.527 lbs per horsepower is a pretty good power to weight ratio. 1/2 mile on dirt, 4 corners, 2 straightaways, 12.707 track record at Eldora speedway, 141.6 MPH average speed. Fastest 1/4 mile dirt record I could find is 9.269 seconds, 97.11 MPH average. There are many variants in between and of course more banking along with longer straightaways will fall in between these 2 figures, If you think it's easy, try it......................... Oh yeah, no breakout and every race has no handicap, heads up all the time, fastest guy wins. |
#27
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How big is this engine to utilize a 5 square inch intake port? Wouldn't you need to turn a 505" engine 11,000 rpm to use it properly?
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James 1970 Trans Am Spotts Built 484" IA2, Highports, EFI Northwind Holley Terminator X sequential EFI fabrication and suspension by https://www.funkhouserracecars.com/ |
#28
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Very Nice Work on the Head, Lynn and Tony!
Tom Vaught
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#29
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NICE
Really like what your doing Lynn. Nice work.
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#30
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Donald said you stole it too...
Nice numbers Lynn! |
#31
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... tell me about it ...
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#32
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... on one hand, that makes me laugh my butt off, on the other it makes me want to smack you ...
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The Following User Says Thank You to twinturrbo406 For This Useful Post: | ||
#33
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... JC said it was the 620c.i. engine earlier in the thread ...
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#34
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Holy Cow! 5 sq in is a big number...a whole QJet will fit in that port. :-)
Hopefully I did the math right - 470 cfm through a 5 sq in opening comes out to an average of 225 ft /sec. and if we use Darin Morgan's port limiting velocity of 665 fps as the choke point, a popular 541 cid combo could turn to 10,800 RPM before choke. D*mn!! Lynn What is your target engine size/application? |
#35
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But it doesn't look like the factory V head anymore.
Calvin Hill Hill Performance 708-250-7420 |
The Following User Says Thank You to 65nss4spdGTO For This Useful Post: | ||
#36
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Great work Lynn!!! And thank you for being the only person to start laying down the ground work to start offering some real world cubic inches!600-700cubic inches sounds like more of what the competition in the nhra is running.I know that is off subject but I wanted to say thanks.
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"You have to evaluate the past,Focus on the future,and that tells you what you have to do in the present"--Lou Holtz “It’s the process it takes to get to goals that sets us apart, the execution on every single play, one play,one life” Notre Dame Head Coach Marcus Freeman 69 GTO NHRA Super Street Car 2860lbs 10.854@160.12 in Brainerd MN 7/2024 |
#37
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Tony says that they get heads in his shop all the time that actually flow big numbers, but they dont make any power. He redoes the heads.....the flow drops and the power comes back up to what he normally gets. It is like making beautiful pasty that tastes like S*&).
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Lynn McCarty dba/McCarty Racing www.RamAirV.com lmc3470@aol.com www.ChemicalManagementIndiana.com 317-260-3486 |
#38
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#39
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I fundamentally disagree with moving the pushrod out of the way. Cross Sectional area on those engines are way more important than flow. We could only achieve the additional CSA by squaring off the port. CSA(min) = bore x bore x stroke x rpm x 0.0035/620 = 4.5 x 4.5 x 4.785 x 8000 x .0035/620 = 4.46 sq inches minimum. This limits this engine to low 8000 RPM with a minimum port. Our next engine is the 406 RAV engine @ 11,000 RPM. Valve train lined up straight I believe is a very good thing. A 5.750 length valve and pushrods in the 8.200 length range advantage RAV.
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Lynn McCarty dba/McCarty Racing www.RamAirV.com lmc3470@aol.com www.ChemicalManagementIndiana.com 317-260-3486 Last edited by NHRASuperStock455SD; 05-23-2012 at 09:11 AM. |
#40
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