02ZOh6

Alright guys, Geoff at Thunder picked out this cam for me after I told him what I had and what I was after. I know I must be doing something wrong because I tried to figure out my dcr and I got something like 10.3
I have a stock bottom Z06 with:

etp 215's 60 cc
0.040 Cometic
.007 out the hole

Cam info:

Duration @ .006 Tappet Lift
Intake:273 Exhaust:283

Valve timing @ 0.050
OPEN CLOSE
INT: 4- BTDC 47 ABDC
EXH: 49 BBDC 5 ATDC

Specs are for cam installed @ 116 ICL

Duration @ 0.050
Intake:223 Exhaust:234


Lobe Separation 114

Grind#: LS1 2126R/3727R HR114-2

Thanks for any help.

SuperSporttruck

iTrader: (2)

Using a 3.906 bore, 4.025 gasket bore. I got a SCR of 11.62 to 1 and a DCR of 8.639 to 1. If you know the bore and gasket size for sure post it up.

02ZOh6

That sounds better. So you need the actual gasket bore size. I believe they're 3.910 but the car is at my dad's so I can't be 100%. Also, you need the actual bore of the cylinder? This might be difficult as the heads are already on the car. Thanks for your help SSTruck and pardon my ignorance.

JakeFusion

iTrader: (7)

SCR is 11.66:1
DCR is 8.67:1

02ZOh6

Thanks guys, I appreciate the help. I didn't expect my DCR to be that high. Looks like the tune is going to have to be spot on.

jrp

iTrader: (16)

Scr 11.6510104626821
Dcr 8.66123555105717

1989GTA

If you feel that the DCR is to high you can always retard the cam a degree or two. That will knock it down some. I would double check with Geoff at Thunder.