cam choice
Thread Starter
Le Mans Master
Joined: Nov 2009
Posts: 6,882
Likes: 235
From: Bangkok, Thailand
cam choice
I'll be pulling the engine out of the 91 this week due to the dead rings. I have a great low-miles 87 engine that I will swap out the bottom end with. I have a set of Fast Burn heads on the way and will have my Accel intake welded up to fit the heads.
I need a cam with will give a littel more "oomph" and work better with the Fast Burn heads than the stock L-98 cam, BUT I'm in Kalifornia, so I need something with a good/pretty smooth idle that will pass smog.
I'm going to do a 2200-2400 converter and have 3.07 gears. I may auto-x it once a year or so, but realisitically, I drive it 20K miles a year, and I want smooth and flexible more than I want race car.
I'm looking at the ZZ4 cam since I can't find a good LT-4 cam for a reasonable price. TPIS has a small cam but it's only .420 lift and the ZZ-9 cam looks bigger than I want.
Anyone who's run a ZZ4 cam in a similar setup (and especially if you passed CA smog with it), please chime in.
Thanks,
Marc
I need a cam with will give a littel more "oomph" and work better with the Fast Burn heads than the stock L-98 cam, BUT I'm in Kalifornia, so I need something with a good/pretty smooth idle that will pass smog.
I'm going to do a 2200-2400 converter and have 3.07 gears. I may auto-x it once a year or so, but realisitically, I drive it 20K miles a year, and I want smooth and flexible more than I want race car.
I'm looking at the ZZ4 cam since I can't find a good LT-4 cam for a reasonable price. TPIS has a small cam but it's only .420 lift and the ZZ-9 cam looks bigger than I want.
Anyone who's run a ZZ4 cam in a similar setup (and especially if you passed CA smog with it), please chime in.
Thanks,
Marc
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Dont think the ZZ4 over stock would be worth it.
ZZ9 would be a safe bet on smog and work well, idle nice too.
Those heads have real good airspeed so you can run a not big cam with them and they will work great with it.
ZZ9 would be a safe bet on smog and work well, idle nice too.
Those heads have real good airspeed so you can run a not big cam with them and they will work great with it.
Team Owner
Joined: Dec 2000
Posts: 21,094
Likes: 282
From: Phila., PA burbs
1.5 ratio rockers 1.6 ratio rockers
intake / exhaust intake / exhaust
Gross Valve Lift .525" / .525" .560" / .560"
Duration @ .006" 280" / 280'
Duration @ .050" 219' / 219'
Lobe Lift .350" / .350"
Cam Lobe Center 112'
Intake Center Line 108'
Valve Timing @ .050 open / BTDC Close / ABDC
INTAKE 1.5' 37.5'
open / BBDC Close / ATDC
EXHAUST 45.5' -6.5'
Thread Starter
Le Mans Master
Joined: Nov 2009
Posts: 6,882
Likes: 235
From: Bangkok, Thailand
1.5 ratio rockers 1.6 ratio rockers
intake / exhaust intake / exhaust
Gross Valve Lift .525" / .525" .560" / .560"
Duration @ .006" 280" / 280'
Duration @ .050" 219' / 219'
Lobe Lift .350" / .350"
Cam Lobe Center 112'
Intake Center Line 108'
Valve Timing @ .050 open / BTDC Close / ABDC
INTAKE 1.5' 37.5'
open / BBDC Close / ATDC
EXHAUST 45.5' -6.5'
intake / exhaust intake / exhaust
Gross Valve Lift .525" / .525" .560" / .560"
Duration @ .006" 280" / 280'
Duration @ .050" 219' / 219'
Lobe Lift .350" / .350"
Cam Lobe Center 112'
Intake Center Line 108'
Valve Timing @ .050 open / BTDC Close / ABDC
INTAKE 1.5' 37.5'
open / BBDC Close / ATDC
EXHAUST 45.5' -6.5'
