Supercharging large cam
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Car: 90 iroc z
Engine: 358 tpi
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Supercharging large cam
I have a built na motor. Currently running a 110 lsa cam 230/234. I came across a vortech v1 that i am almost finished installing. Anyone else run a blower with a high overlap cam? I'm really not enthusiastic about tearing this motor apart to change the cam
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Joined: Jul 2016
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Car: 90 iroc z
Engine: 358 tpi
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Joined: Sep 2003
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From: Pittsburgh PA
Car: 89 Iroc-z
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Re: Supercharging large cam
Yeah it should be ok enough. Blower cams can tend to be wider lsa and more exhaust duration but not always
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Joined: Sep 2001
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From: Ontario, Canada
Car: 1988 Firebird S/E
Engine: 406Ci Vortec SBC
Transmission: TH-350/3500stall
Axle/Gears: 7.5" Auburn 4.10 Posi-Traction
Re: Supercharging large cam
All these comp cams and others like them typical 110 LSA and 4 to 6 degress extra exhaust duration work fine for moderate supercharging.
. That cam will work fine.
If you want to enhance it with that cam you can consider moving the cam to enhance the exhaust valve open close events by advancing the cam a bit.
Try a slightly more advanced 104in/116 ex c/L's
That 110 LSA cam is now 6 degrees advanced.
.This helps get the supercharged exhaust out by opening the exhaust valve a hair earlier.
Exhaust blowdown is enhanced.
Also the exhaust closing point closes a hair earlier ATDC which will improve boost response a bit.
It will GLH.
You don't need a "blower cam or a "nitrous cam"
or a cam "with wide LSA" until you get way up on boost well beyond 10++ psi.
Even the typical comp Magnum single pattern cams 110 LSA eg Comp 280H-10 cam work just fine in mild moderate boost low compression ratio street blower engines. Again you can dial these in a bit for the blower by advancing them a bit more than cam card spec. 106/114 centers. I suggest 104/116 centers. It will make great power and torque right where you need it to go fast on the street.
. That cam will work fine.
If you want to enhance it with that cam you can consider moving the cam to enhance the exhaust valve open close events by advancing the cam a bit.
Try a slightly more advanced 104in/116 ex c/L's
That 110 LSA cam is now 6 degrees advanced.
.This helps get the supercharged exhaust out by opening the exhaust valve a hair earlier.
Exhaust blowdown is enhanced.
Also the exhaust closing point closes a hair earlier ATDC which will improve boost response a bit.
It will GLH.
You don't need a "blower cam or a "nitrous cam"
or a cam "with wide LSA" until you get way up on boost well beyond 10++ psi.
Even the typical comp Magnum single pattern cams 110 LSA eg Comp 280H-10 cam work just fine in mild moderate boost low compression ratio street blower engines. Again you can dial these in a bit for the blower by advancing them a bit more than cam card spec. 106/114 centers. I suggest 104/116 centers. It will make great power and torque right where you need it to go fast on the street.
Last edited by F-BIRD'88; Jul 31, 2022 at 09:22 PM.
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Joined: Sep 2001
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From: Ontario, Canada
Car: 1988 Firebird S/E
Engine: 406Ci Vortec SBC
Transmission: TH-350/3500stall
Axle/Gears: 7.5" Auburn 4.10 Posi-Traction
Re: Supercharging large cam
This minor tweek makes that cam more friendly to creating power and torque right where you use it on the street, with the blower.
Last edited by F-BIRD'88; Jul 31, 2022 at 08:50 PM.
Joined: Jul 1999
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From: SALEM, NH
Car: '88 Formula
Engine: LC9
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Re: Supercharging large cam
Which V1 head unit? Blower might be too small for the application.
-- Joe
-- Joe
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