CLASS RACER FORUM - Heads up runs in Stock & Super Stock

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Re: Heads up runs in Stock & Super Stock

These are what I found TPI Intakes and runners

The following airflow tests were performed on the University of Northwestern Ohio's SuperFlow SF600 Flow Bench.
All CFM values are corrected for airflow at 28 inches of water.
Injector flow rates are flowed at 43.5 PSI on an injector flow bench using test fluid with same density as gasoline.

AirFlow

Stock TPI/LT1 48mm Throttle Body w/o airfoil -- 783.0 cfm

Stock TPI/LT1 48mm Throttle Body w/ airfoil -- 821.9 cfm

TPI/LT1 52mm Throttle Body w/o airfoil -- 848.9 cfm

TPI/LT1 52mm Throttle Body w/ airfoil -- 898.8 cfm

Stock 98 Camaro 3800 II Throttle Body -- 554.3 cfm

Stock TPI Bosch MAF sensor w/ screens -- 517.8 cfm

Stock TPI Bosch MAF sensor w/o screens -- 658.4 cfm

Stock 87 GN 3.8L Turbo AC MAF sensor w/ screen -- 584.2 cfm

Stock 86 2.8L AC 5-wire MAF sensor w/ screen -- 576.2 cfm

Stock 96-up AC 3100 V6 MAF sensor w/ screen -- 616.4 cfm

Stock 96-up AC 3100 V6 MAF sensor w/o screen -- 670.7 cfm

Stock 94-up LT1 MAF Sensor w/o screen -- 719.0 cfm

Stock 85-87 Firebird TPI airbox mid piece -- 499.3 cfm

Stock 4.3/5.0/5.7 2bbl TBI complete -- 574.1 cfm (dry)

Stock 4.3/5.0/5.7 2bbl TBI w/o injectors -- 584.7 cfm

Stock 3800 vin L throttle body w/ screen -- 419.1 cfm

Stock 3800 vin L throttle body w/o screen -- 444.8 cfm

4bbl MPFI Holley Throttle Body -- 1287.6 cfm

Re: Heads up runs in Stock & Super Stock

From same web page

Flow (cfm) Max. NA HP
Stock 668 300
Stock w/airfoil 710 350
52MM w/airfoil 835 400
54MM (AS&M) 900 450
58MM 1050 500

Re: Heads up runs in Stock & Super Stock

Great info. Any track confirmation A.B.A?

Re: Heads up runs in Stock & Super Stock

Here is a similar website..

http://gmtuners.com/flow/

Re: Heads up runs in Stock & Super Stock

Carburetors are not rated at that high of a test pressure. Raise that, cfm goes up.
Flow a 750 cfm Holley or Quadrajet carb ar 28", it will show MUCH more than 750 cfm.
28" is for cylinder heads.

Re: Heads up runs in Stock & Super Stock

Quote:

Originally Posted by Ed Wright (Post 498011)

Carburetors are not rated at that high of a test pressure. Raise that, cfm goes up.
Flow a 750 cfm Holley or Quadrajet carb ar 28", it will show MUCH more than 750 cfm.
28" is for cylinder heads.

28" vacuum is standard = 1.01 lbf/ inch squared

Re: Heads up runs in Stock & Super Stock

Quote:

Originally Posted by Dan Fahey (Post 498015)

28" vacuum is standard = 1.01 lbf/ inch squared

It is the standard for CYLINDER HEADS! And, not all shops even use that.

When did you get your first flow bench? Over 30 years ago here.

2 & 4 barrels carbs are not even rated at the same depression.

To compare them to carburetors, they would have to be flowed at the same depression.

Re: Heads up runs in Stock & Super Stock

Quote:

Originally Posted by Ed Wright (Post 498011)

Carburetors are not rated at that high of a test pressure. Raise that, cfm goes up.
Flow a 750 cfm Holley or Quadrajet carb ar 28", it will show MUCH more than 750 cfm.
28" is for cylinder heads.

My cfm measurement is the timeslip! :-)

Re: Heads up runs in Stock & Super Stock

Quote:

Originally Posted by Sean Cour (Post 498020)

My cfm measurement is the timeslip! :-)

But, we don't know as much as the office guy above. He has Google.

Re: Heads up runs in Stock & Super Stock

Quote:

Originally Posted by Sean Cour (Post 497879)

Mike, our division six director had a great idea of taking the top 10 qualifiers of stock and super stock for the year, and have a shootout. CIC rules for each round. Winner was top qualifier. I thought this idea sounded fun.

Sean,

This sounds like a lot of fun, do you think we can make this happen? I'll reinstall my rear view mirrors and get some new brake pads...

Jim Caughlin
SS 6019