Super charger/compression

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Sep 22, 2004 | 08:15 AM

87tpi

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From: Gardnerville, Nv.

Car: 00 Camaro SS

Engine: 5.7

Transmission: 6 speed

Super charger/compression

This is the supercharger that I plan on using.What compression would be best.I plan on using afr 195's but not sure what compression to use.I want to use pump gas with the most psi possible.http://proficientperformance.com/Mer...&Store_Code=PP

Last edited by 87tpi; Sep 25, 2004 at 12:48 AM.

Sep 22, 2004 | 09:27 PM

sleepybu

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From: BC Canada

Car: 81Malibu

Engine: SBC 355

Transmission: TH400

8 to 1

Sep 22, 2004 | 10:39 PM

Cameron

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From: East Texas

Car: 1985 Z28

Engine: 350

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Last edited by Cameron; Sep 28, 2004 at 07:16 PM.

Sep 23, 2004 | 12:28 AM

sleepybu

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From: BC Canada

Car: 81Malibu

Engine: SBC 355

Transmission: TH400

Quote:

Originally posted by Cameron
i'm running 9:1 /shrug

I'm a noob

Sep 23, 2004 | 05:46 PM

anesthes

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From: SALEM, NH

Car: '88 Formula

Engine: LC9

Transmission: 4L60E

Axle/Gears: 3.89 9"

Quote:

Originally posted by Cameron
i'm running 9:1 /shrug

I'm a noob

Yet faster than the guy running 8:1

-- Joe

Sep 24, 2004 | 12:01 AM

sleepybu

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From: BC Canada

Car: 81Malibu

Engine: SBC 355

Transmission: TH400

Quote:

Originally posted by anesthes
Yet faster than the guy running 8:1

-- Joe

Sep 24, 2004 | 05:32 AM

anesthes

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From: SALEM, NH

Car: '88 Formula

Engine: LC9

Transmission: 4L60E

Axle/Gears: 3.89 9"

Re: Super charger/compression

Quote:

Originally posted by 87tpi
This is the supercharger that I plan on using.What compression would be best.I plan on using afr 195's but not sure what compression to use.I want to use pump gas with the most psi possible.http://proficientperformance.com/Mer...&Store_Code=PP

You need to realize something that escapes people. These setups were designed for STOCK cars with STOCK compression ratios.

Building a durable, high performance forged slug motor, then dropping the compression ratio to LESS than your stock static ratio is just plain stupid..

Run factory compression, build a free flowing exhaust, which includes head porting, and learn to tun with the '749.

-- Joe

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Sep 24, 2004 | 06:39 AM

'91 Formula

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From: Lk. Ronkonkoma, Long Island N.Y., U.S.A.

Car: 1991 Firebird Formula

Engine: 383 Supercharged and Intercooled

Transmission: 6-Speed

Axle/Gears: Stock 10 bolt 3.42

9.8:1 and iron heads. I did not want it to be a dog not in to boost.

Sep 24, 2004 | 07:32 AM

anesthes

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From: SALEM, NH

Car: '88 Formula

Engine: LC9

Transmission: 4L60E

Axle/Gears: 3.89 9"

Quote:

Originally posted by '91 Formula
9.8:1 and iron heads. I did not want it to be a dog not in to boost.

With the 7.5 and the 3.33 what is your impeller speed!?

Damn. Sounds nice.

I'm redoing my motor this winter. Gonna go with a smaller chamber, around 9.7:1 c/r.. S-trim.

-- Joe

Sep 24, 2004 | 09:27 PM

#10

biggtime

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I run 9.5:1. ran pump gas with 9lbs no problem.
Blownss has 9:1 14lbs on pump gas.
Both cars are intercooled

Sep 25, 2004 | 12:52 AM

#11

87tpi

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From: Gardnerville, Nv.

Car: 00 Camaro SS

Engine: 5.7

Transmission: 6 speed

So with a decent cam,Afr 195's 12 psi,forged bottom end and a ported tpi set up,any ideas on horsepower and torque?I know I can't get an exact but I want a good idea before spending the cash.I am trying to stay ca. legal.

Sep 26, 2004 | 02:34 AM

#12

87tpi

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From: Gardnerville, Nv.

Car: 00 Camaro SS

Engine: 5.7

Transmission: 6 speed

What cam should I use for best hp and torque while staying ca. legal?

Sep 26, 2004 | 10:38 AM

#13

anesthes

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From: SALEM, NH

Car: '88 Formula

Engine: LC9

Transmission: 4L60E

Axle/Gears: 3.89 9"

Quote:

Originally posted by 87tpi
What cam should I use for best hp and torque while staying ca. legal?

Something that makes the most power, and is 50 state legal.

-- Joe

Sep 27, 2004 | 01:23 AM

#14

87tpi

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From: Gardnerville, Nv.

Car: 00 Camaro SS

Engine: 5.7

Transmission: 6 speed

yeah,thanks

Sep 27, 2004 | 06:26 AM

#15

anesthes

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From: SALEM, NH

Car: '88 Formula

Engine: LC9

Transmission: 4L60E

Axle/Gears: 3.89 9"

Quote:

Originally posted by 87tpi
yeah,thanks

Well what else would you like me to say?

Keep your air and cat functioning. Mass uses the same emissions as california. I passed with flying colors on my 560hp setup.

-- Joe

Sep 27, 2004 | 07:19 AM

#16

87tpi

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From: Gardnerville, Nv.

Car: 00 Camaro SS

Engine: 5.7

Transmission: 6 speed

What size cam are you using?

Oct 2, 2004 | 09:04 PM

#17

Beast5spdGTA

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Joined: Jun 2000

Posts: 781

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From: Palm Bay, FL

Car: 2007 Corvette Z06

Engine: LS7

Transmission: 6 speed

I've been running 9.3:1 stock swirl port iron heads and 9-12 psi depending on belt slippage with no problems for 4-5K miles. I live in central FL where air temp is in the ~90 everyday and water temp struggles to stay below 220*.

I would think AL heads and good/smart tuning should see 10:1 comp and 15 psi easy on pump gas. Think big intercooler or other forms of detonation control.