Which cam should I get? How much should I port these heads?
Thread Starter
Joined: Jul 1999
Posts: 306
Likes: 0
From: Michigan
Car: 2KGTP
Engine: supercharged 3800 L67
Transmission: 4T65E
Axle/Gears: 2.93
Which cam should I get? How much should I port these heads?
This is for the Z28 with the mods listed below. I'm going to install either comp cams 268XE or 274XE. They spec at 224/230 .477/.480 and 230/236 .487/.490. I have center bolt TPI heads that I'm going to have ported. I plan to have them milled to 10.0:1 compression, polish the chambers, and port work.
Keep in mind this car is geared for horsepower, 1st gear goes really quick and the engine does not go below 4000rpm after shifts. Just as long as I don't loose much
torque I'll be happy.
The questions are: Which cam should I use and how much port work should I have done? Cost is not an issue as I'm getting them done for free.
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1986 CAMARO Z28 ->
151,000 original miles, 43,000 on 89' vette 350 block, Holley 650 DP, Weiand intake, 1.6 rockers, 1 5/8" headers, no cat, 2 1/2" Flowmaster catback, Mallory coil, March pulleys, B&M Ripper shifter, T5 with 3.35 1st gear and 0 miles, 90% Centerforce clutch, 3.73 posi, Eibach 1" drop springs, Spohn LCA's, Spohn adjustable panhard rod, Subframe connectors, all bushings are urethane, 2 12" Sound Streams, 2 Infinity 6X9's, 2 Pioneer 6X9's, 800 watt Lanzar Vibe amp. ET 13.22@ 106.4MPH 3300lbs less driver and speakers Next mods-> Extreme Energy 268 cam, Holley street dom intake.
1987 TRANS AM ->
73,000 miles, 305TPI, auto, gutted air box.
Keep in mind this car is geared for horsepower, 1st gear goes really quick and the engine does not go below 4000rpm after shifts. Just as long as I don't loose much
torque I'll be happy.
The questions are: Which cam should I use and how much port work should I have done? Cost is not an issue as I'm getting them done for free.
------------------
1986 CAMARO Z28 ->
151,000 original miles, 43,000 on 89' vette 350 block, Holley 650 DP, Weiand intake, 1.6 rockers, 1 5/8" headers, no cat, 2 1/2" Flowmaster catback, Mallory coil, March pulleys, B&M Ripper shifter, T5 with 3.35 1st gear and 0 miles, 90% Centerforce clutch, 3.73 posi, Eibach 1" drop springs, Spohn LCA's, Spohn adjustable panhard rod, Subframe connectors, all bushings are urethane, 2 12" Sound Streams, 2 Infinity 6X9's, 2 Pioneer 6X9's, 800 watt Lanzar Vibe amp. ET 13.22@ 106.4MPH 3300lbs less driver and speakers Next mods-> Extreme Energy 268 cam, Holley street dom intake.
1987 TRANS AM ->
73,000 miles, 305TPI, auto, gutted air box.
Thread Starter
Joined: Jul 1999
Posts: 306
Likes: 0
From: Michigan
Car: 2KGTP
Engine: supercharged 3800 L67
Transmission: 4T65E
Axle/Gears: 2.93
this question is really important. Aren't there any cylinder head guru's out there?
------------------
1986 CAMARO Z28 ->
151,000 original miles, 43,000 on 89' vette 350 block, Holley 650 DP, Weiand intake, 1.6 rockers, 1 5/8" headers, no cat, 2 1/2" Flowmaster catback, Mallory coil, March pulleys, B&M Ripper shifter, T5 with 3.35 1st gear and 0 miles, 90% Centerforce clutch, 3.73 posi, Eibach 1" drop springs, Spohn LCA's, Spohn adjustable panhard rod, Subframe connectors, all bushings are urethane, 2 12" Sound Streams, 2 Infinity 6X9's, 2 Pioneer 6X9's, 800 watt Lanzar Vibe amp. ET 13.22@ 106.4MPH 3300lbs less driver and speakers Next mods-> Extreme Energy 268 cam, Holley street dom intake.
1987 TRANS AM ->
73,000 miles, 305TPI, auto, gutted air box.
------------------
1986 CAMARO Z28 ->
151,000 original miles, 43,000 on 89' vette 350 block, Holley 650 DP, Weiand intake, 1.6 rockers, 1 5/8" headers, no cat, 2 1/2" Flowmaster catback, Mallory coil, March pulleys, B&M Ripper shifter, T5 with 3.35 1st gear and 0 miles, 90% Centerforce clutch, 3.73 posi, Eibach 1" drop springs, Spohn LCA's, Spohn adjustable panhard rod, Subframe connectors, all bushings are urethane, 2 12" Sound Streams, 2 Infinity 6X9's, 2 Pioneer 6X9's, 800 watt Lanzar Vibe amp. ET 13.22@ 106.4MPH 3300lbs less driver and speakers Next mods-> Extreme Energy 268 cam, Holley street dom intake.
1987 TRANS AM ->
73,000 miles, 305TPI, auto, gutted air box.
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