bad6as

iTrader: (17)

for you advanced guys
and u teach me how to use the ve calc so i can get a custom cam grinded and not regret it

Ferocity02

iTrader: (60)

Which one are you using?

bad6as

iTrader: (17)

the one in the cam guide

bad6as

iTrader: (17)

http://users3.ev1.net/~black_ops/cam...calculator.xls

Ferocity02

iTrader: (60)

Try using this one for starters: http://www.alantripp.com/VE%20Calcul...y%20Lookup.xls

It's a little more self explanatory and there isnt as much mumbo jumbo to get caught up in. On the first sheet, enter the duration (@.050") of the cam size you are thinking about. You don't need to enter any of the other info on that first sheet. For some reason sheet 2("DCR") doesn't work for me. I get a bunch of #N/A's, so I use sheet 4("DCR Manual Calculator"). This sheet takes your durations from the first sheet and puts them into the 0.050 column(D6 & D7). Then you can enter your LSA you want in the same column, 3rd row(D8). For D9, enter your intake centerline(LSA - the advance). Now you have to enter the .006" durations of the cam in C6 and C7. These can be found on sheet 3("Lobe Source"). They are just a few common Comp Cams' grinds. More can be found on their website. This chart will give you your duration at .006" that you will need to enter. Entering these numbers will give your correct DCR. If you are building a motor, you can enter the specs on sheet 4 as well and get an accurate DCR. All the numbers in blue are your valve events, you cannot change these numbers, they change when you adjust the durations, LSA, and ICL. You do not need to enter the durations at .200" unless you want to see the VE's at that lift.

bad6as

iTrader: (17)

thanks

whats the best scr and dcr? for 93 oct?

Ferocity02

iTrader: (60)

Depends what your goals are. For NA motors, you can probably get away with an 11-11.5:1 SCR, and an 8.5-8.75:1 DCR. Depends a lot on tuning though. I will be running an 8.42 DCR on 91 octane. You can run an 9.5:1 DCR on pump gas if the tuning is right, but that is risky and hardly worth it. For FI motors, you will want a lower SCR around 8.5:1.

bad6as

iTrader: (17)

my scr is staying the same at 10.06 because all im changing is the cam right?

for the dcr it changes for the specs of the cam. for 93 oct and possible n2o should the dcr be higher or lower

and what does a higher or lower dcr mean?

and how about an overlap to get no higher or lower then what?

jrp

iTrader: (16)

pick up the phone and call a camshaft expert, im partial to Ed Curtis myself. its not as easy as pluggin in some figures to design your cam.

bad6as

iTrader: (17)

228/228
284 @ .006
.600 @ .05
112 lsa
110 icl

all @ .05
ivo 4
ivc 44
evo 48
evc 0
ecl 114
overlap 4

dcr 7.55

good for a dd that might get n20 later on?

looking to shift at 6500
good? bad?