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There's no reason for the program to allow you to enter LSA if you enter the ICL and ECL.That's because LSA is simply (ICL + ECL) / 2.Example: A cam with 104 ICL and 108 LSA will always have an ECL of 112. So a cam with an ICL of 106 and and ECL of 118 will have an LSA of 112. That's just the way the math works out.
That's true, but from being on a slant 6 site; it's easier to think in terms of ICL and LSA (slant 225s like tight LSA and advance ICL). Then let the program figure out the ECL.....
Some info on Jim's 272 grind and the variations available for Gnarly's spreadsheets:"The 272 cam has 232 @.050 on the intake and the exhaust has 220 @.050. The lift is 430 at the valve . It can be ground on a 110, 112, 114 lobe separation. Intake center line is 105. We can also flip the profile around so the exhaust has the 232."I just asked him to make me whatever variation would be best for a carbed truck with smaller tires and good gearing that I want to wind out a bit , idle quality and bottom end negligible. Plan to use it in an engine I will make for my stock-ish 1980 pickup.
You find it unusual for a cam to have advance ground into it? Many (I'd even say 'most) cams do. Look at the LCE grinds.
There's more than one LCE profile with advance ground in. In fact, there are several.
We should get more bottom end in traditional theory but it probably depends on all the other aspects of the cam profile.
Intake Exhaust Valve Lash .008 .012 Valve Lift .442 .442 Advertised Duration 237° 240° Duration @ .050" 216° 219° Lobe Center 102° 119.5° Lobe Separation 110° Intake Opens 6° BTDC Intake Closes 30° ABDC Exhaust Opens 49° BBDC Exhaust Closes -10° BTDC
Yep. In general, that's the idea - more low end torque though sometimes it will increase torque output across the cam's usable RPM range.Gnarly - plug a cam in to your dyno sim program straight up, then advance it 4 or 6 or 8 degrees and watch what happens.Here's one LCE cam that has 8 degrees of advance ground in. Their website lists all the lobe position specs for their cams and there are several other grinds with varying amounts of advance ground in.http://www.lceperformance.com/EFI-Pro-Camshaft-22RE-RET-p/1022021.htm
How did you determine the cam timing of the LCE cams with ground in advanced? Where in their specs do they publish CAM TIMING?
Intake Opens 6° BTDC Intake Closes 30° ABDC Exhaust Opens 49° BBDC Exhaust Closes -10° BTDC
Hey Plainview,I'm not trying to be a butt-head with my questions, but really just curious about what published specs on a supplier's cam means to the average buyer. And, then what cam timing does to the valve opening and closing events.How did you determine the cam timing of the LCE cams with ground in advanced? Where in their specs do they publish CAM TIMING? Where in their published specs do you see OVERLAP DEGREES?If you see the Lobe Separation Angle in the cam spec, will that tell you the Intake Centerline?Geezzz…I’ve played with cam timing in the EA software a zillion times!Gnarls.
Forgive me, I assumed you knew the term "cam timing."
Right Here:QuoteIntake Opens 6° BTDC Intake Closes 30° ABDC Exhaust Opens 49° BBDC Exhaust Closes -10° BTDC A cam calculator can figure out ICL,ECL,LSA, overlap from above
No, Only have LSA. Need ICL to mathematically determine ECL.Although you could set ICL to anything you wanted too............
Hey butt-head, can you make a spread sheet from those 272 specs or do you need more/different data?
Question: If engbldr cams, Comp Cams, Schneider cams, Crane cams, Erson cams, and TRD cams all have NO advanced cam timing in their Toyota 20/22 profiles, what does LCE KNOW that they do not?Would you care to speculate?Gnarls.
OK "simpleton"... I will see what I can do. Gnarls.
Hey Plainview… Thank you! I had no flipp’n idea what cam timing is. I clipped this from Crower’s website: https://www.crower.com/camshafts.html?cat=1065Can you please tell me what the ICL is for those “published” specs?Part Number: 61809 Toyota CamshaftToyota - 22RPerformance level 5 - EFI - Stage 4 (Full Race) - Mostly strip, not for daily driver. Very rough idle, aftermarket valve springs, ECU mods required.INT/EXH - Dur @ .050” Lift: 236°/240° RR: 1.5/1.5Gross Lift: .443”/.417” LSA: 114° RPM: 3000 to 7500Redline: 8000Gnarls.
I'm stumped on how to find listings for TRD parts for these engines? trdusa.com doesn't list anything for cars older than '95 so if I didn't hear it here I'd assume they don't offer anything for these old engines...
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