Calling all cam Guru's - Ideas for daily driver (243s/rod bolts/willing to flycut!)
05-03-2010, 01:37 AM
#46
Anyone who has only seen cam specs here and magazines would definitely say "WTF" at this cam for a DD with a 3600 stall, but it's going to work, and I cannot wait to see the dyno graph
05-03-2010, 05:28 AM
#49
TECH Resident
iTrader: (6)
Join Date: Aug 2006
Location: Hampstead, MD
Posts: 766
Likes: 0
Received 0 Likes
on
0 Posts
It didn't financially make sense for you to get a cam prior to getting your stall the first time around. =] Glad to see you're stepping up quite a bit though. Subbed to get some results out of this!
05-03-2010, 09:17 PM
#53
TECH Fanatic
iTrader: (1)
Join Date: Feb 2004
Location: Goshen,In.
Posts: 1,027
Likes: 0
Received 0 Likes
on
0 Posts
I want to comment about the valves. Stay with the stock sized valves.
I do not see the point of anything larger than a 2.0 on a stock bottom end.
1) Opening the throat to 90% already puts the throat cross sectional area at around 2.47 inches. That is already almost too big for a stock bottom end as the throat SHOULD be your minimum csa.
2) If they are ls6 heads off a z06, you have sodium filled or hollow stems. The valves are as light as you can get, why move up to a heavy stainless steel valve?
3) If you DO put a 2.02 or 2.04 or 2.05 valve into the port, if you DO NOT open the throat up to match it, you are killing HP. People should ask supplies who offer the bigger valve if they open the throat to match the valve, then MEASURE IT when the do get them.
4) Even if you do open the throat to match a bigger valve, the coefficient of discharge needs to remain the same or increase with bigger valves, or else it isn't worth it either.
I do not see the point of anything larger than a 2.0 on a stock bottom end.
1) Opening the throat to 90% already puts the throat cross sectional area at around 2.47 inches. That is already almost too big for a stock bottom end as the throat SHOULD be your minimum csa.
2) If they are ls6 heads off a z06, you have sodium filled or hollow stems. The valves are as light as you can get, why move up to a heavy stainless steel valve?
3) If you DO put a 2.02 or 2.04 or 2.05 valve into the port, if you DO NOT open the throat up to match it, you are killing HP. People should ask supplies who offer the bigger valve if they open the throat to match the valve, then MEASURE IT when the do get them.
4) Even if you do open the throat to match a bigger valve, the coefficient of discharge needs to remain the same or increase with bigger valves, or else it isn't worth it either.
