Cam selection charts by IVC point.
#1
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From: Meriden, CT 06450
Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Cam selection charts by IVC point.
Do any charts like this exist for the current camshaft offerings? I did the calculations and made my own charts for the really old camshafts. It took days making all of those calculations.
I am helping a buddy with an old school 383 SBC and a flat tappet with an IVC point of 60 degrees would yield a DCR of 8.17 at sea level.
An ISKY 264 Mega is one such choice.
I am helping a buddy with an old school 383 SBC and a flat tappet with an IVC point of 60 degrees would yield a DCR of 8.17 at sea level.
An ISKY 264 Mega is one such choice.
#2
Joined: Sep 2004
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From: Chicagoland Suburbs
Car: 1989 Trans Am GTA
Engine: LT1, AFR 195cc, 231/239 LE cam.
Transmission: M28 T56
Axle/Gears: 3.23 10bolt waiting to explode.
Re: Cam selection charts by IVC point.
What do you mean by "Current Offerings". Are you referring to OEM stock camshafts? Probably not unless someone measured them.
As for any aftermarket cam? That can be provided by the MFG. Most times just by looking up the grind on their website.
Example, the CC-306 that people love to shove in LT1s. But really you can look up any CompCam specs this way. Same for Lunati and others. If its not listed, call the MFG and if they can't provide it, they don't deserve your money.
http://www.compcams.com/Company/CC/c...csid=1103&sb=2
The IVC, IVO, EVC, EVO are all listed, along with gross and at .050" lift durations. LSA, LCA...etc.
As for any aftermarket cam? That can be provided by the MFG. Most times just by looking up the grind on their website.
Example, the CC-306 that people love to shove in LT1s. But really you can look up any CompCam specs this way. Same for Lunati and others. If its not listed, call the MFG and if they can't provide it, they don't deserve your money.
http://www.compcams.com/Company/CC/c...csid=1103&sb=2
The IVC, IVO, EVC, EVO are all listed, along with gross and at .050" lift durations. LSA, LCA...etc.
#3
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Joined: Feb 2017
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From: Meriden, CT 06450
Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: Cam selection charts by IVC point.
Thanks. I was talking about current offerings from the major brands; Crane, Crower, Lunati, CompCams, ISKY, etc.
Here are my charts for the streetable old flat tappet camshafts.
Here are my charts for the streetable old flat tappet camshafts.
Last edited by NoEmissions84TA; 04-21-2019 at 10:55 PM.
#4
Joined: Sep 2004
Posts: 5,873
Likes: 223
From: Chicagoland Suburbs
Car: 1989 Trans Am GTA
Engine: LT1, AFR 195cc, 231/239 LE cam.
Transmission: M28 T56
Axle/Gears: 3.23 10bolt waiting to explode.
Re: Cam selection charts by IVC point.
https://www.lunatipower.com/Product....d=2012&gid=289
However, I do remember calling and asking for the event timing and they gave me the #'s over the phone.
Basically, the cam MFG should be able to give these #'s to you. If not, they are being shady and you should not do business with them.
When you buy a cam, it should come with a sheet of paper referred to as the Cam Card. This has all the valve events, lift, duration, lobe sep, lobe center...etc. Everything.
#5
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Joined: Feb 2017
Posts: 4,037
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From: Meriden, CT 06450
Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: Cam selection charts by IVC point.
http://wallaceracing.com/cam-deg-calc.php
OK, for your cam:
IVC is the number you need to calculate your DCR.
OK, for your cam:
IVC is the number you need to calculate your DCR.
#6
Joined: Sep 2004
Posts: 5,873
Likes: 223
From: Chicagoland Suburbs
Car: 1989 Trans Am GTA
Engine: LT1, AFR 195cc, 231/239 LE cam.
Transmission: M28 T56
Axle/Gears: 3.23 10bolt waiting to explode.
Re: Cam selection charts by IVC point.
http://wallaceracing.com/cam-deg-calc.php
OK, for your cam:
IVC is the number you need to calculate your DCR.
OK, for your cam:
IVC is the number you need to calculate your DCR.
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