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#1
08-09-2005, 03:09 PM
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Society of Automotive Engineers (SAE) is used in specifications for all high-grade steels used in automotive and aircraft construction...
Each SAE number consists of a group of digits...(normally 4, but not always) The first digit represents the type of steel...(pricipal alloy element) The second digit represents the percentage of the principle alloying element... The last two or three usually, represent the percentage, in hundredths of 1 percent, of carbon in the alloy... For example, SAE number 4130 indicates Molybdenum steel containing 1 percent molybdenum and 30 hundredths of 1 percent of carbon... Here is the steel chart... Carbon 1xxx Nickel 2xxx Nickel-chromium 3xxx Molybdenum 4xxx Chromium 5xxx Chromium-vanadium 6xxx Tungsten 7xxx Silicon-manganese 8xxx I hope this helps...
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1969 Firebird, Tx3-455/468 machined by CVMS E-heads by Dave Wilcox/Comp Cams 300B-6 flat solid 850DP on E-85 by Eric Niefert/T2 1" plastic spacer T-400/PTC 4000/390's/30x9 Hoosier radial slicks,#3400 1.38 60' 6.32 @ 108 MPH at Northeast Dragway NC 5/23/15 (9th pass on new engine) https://m.youtube.com/watch?v=ePCu2v...ature=youtu.be 1.37 60' 6.26 @ 109 half track, 9.86 @ 136 1/4 mile, #3350 11/26/16 at Richmond Dragway (125th pass on new engine) |
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#2
08-09-2005, 03:13 PM
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Nitriding is not part of the original alloy.
It's basically a process or 'coating' that makes the surface harder.
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! W.E.C moment "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#3
08-09-2005, 03:44 PM
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A couple of clarifications on the forged crank deal.
1) The material will be a 4340 non-twist forging. 2) The crank will NOT be cross drilled. It will incorporate the latest technology in crank oiling, scoop oil holes and straight shot oil timing. This process pressurizes at the low pressure part of the stroke and traps the oil wedge during the high pressure part of the stroke. Cross drilling forces the oil pressure to try and overcome combustion pressure of 1000 plus psi which and translate to 10,000 psi at the bearing. This force will push the oil right back out the journal and send it to another place in the crank. Straight shot traps the oil and it has no where to go but to the rod bearing. It is the best oiling system currently available for low or high HP motors at this time. 3) The 3 inch main cranks will be available in 4, 4.25, and 4.5 inch strokes with 2.200 rod journals. 4) We are hoping to produce a 3 ¼ main but do not yet know if it will happen. If it does it will probably be available in a 4.250 stroke only. 5) Target price is $1095.00 but is not definite at this time. 6) The cranks will be gas nitrided, no induction hardening 7) Neither BOP Engineering or All-Pontiac.com are taking orders at this time We will have more information soon so please be patient. With that said we are pleased to be working together with Frank and Bob to bring high quality racing parts to the Pontiac community.
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Wade Congdon BOP Engineering Hi-Performance Specialty Parts for Buick, Olds, and Pontiac www.bopengineering.com |
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