Godspeed Oakland

I keep seeing this old 2003 posting listing flow numbers for TPI Intakes. I like seeing the intake runner CFM's listed, but I want to see the base manifold numbers without the runners so you can compare base manifolds directly. Does anyone have those numbers?

Also, what are the CFM numbers for the Mini Ram? So we can compare it to the SR. And what is the deal with the 3/8" radiused base manifold inlets? Is that something you have done when getting a base ported or does it come that way with certain aftermarket manifold bases?

Thanks!

QUOTE: "When you look at the choices the upgrade to the HOLLEY STEALTH RAM GIVES YOU THE MOST FOR YOUR MONEY
compare the airflow numbers

CROSSFIRE INTAKE
190cfm per port runner (measured individually)

TPI Runners (measured individually)
Stock....................203.17 cfm
ACCEL................242.02 cfm
Extrude/ACCEL...275.83 cfm
Super Ram (ported)............289.18 cfm
Intake manifold with 3/8 inch radiused intlet
.............................222.45 cfm
Stock intake manifold with runner
Stock....................198.72 cfm
ACCEL................213.52 cfm
Extrude/ACCEL....217.11 cfm
Super Ram............220.67 cfm

ACCEL Hi-Flow intake manifold with 3/8 inch
radiused inlet.........251.51 cfm

ACCEL Hi-Flow intake manifold with runner
Stock....................215.83 cfm
ACCEL................232.53 cfm
Extrude/ACCEL....243.21 cfm
Super Ram............240.24 cfm

Extrude-Honed ACCEL Hi-Flow intake
manifold with 3/8 inch radiused inlet
............................275.83 cfm

Extrude-Honed ACCEL Hi-Flow intake
manifold with ACCEL runner
............................266.94 cfm

Edelbrock Performer RPM manifold
(Stock)..................286.51 cfm

Edelbrock Victor Jr.
.............................275.24 cfm


Runners (measured individually)
HOLLEY STEALTH RAM Stock....................275 cfm
HOLLEY STEALTH RAM ported..................298 cfm


THE HOLLEY STEALTH RAM EFI INTAKE SYSTEM POTENTIALLY MAKES MORE TQ OVER A WIDER RPM RANGE AND SIMILAR or HIGHER PEAK HP THAN THE BEST OF THE OTHER CHOICES AVAILABLE
AND WITH THE CUSTOM PLENUM IT FITS CORVETTES"

Godspeed Oakland

I found this info and I figured you guys might like to look it over, now the first thing I want to point out is where the DATA came from. and KEEP IN MIND ITS REAR WHEEL HP AND The TPI INTAKE IN THE TEST consists of 58mm TB, fully ported plenum, AS&M largetube runners, and highly ported Edelbrock base WHICH MEANS ITS ALREADY MAKING AT LEAST 25HP-30HP MORE THAN A STOCK TPI INTAKE)


http://www.eecis.udel.edu/~davis/z28/winter01/dyno/

The engine was basically the same,in all the test except for the intake manifold, consisting of a ZZ4 crate motor, AFR190 heads, LT4 HOT cam, and SLP 1-3/4" SS headers. Trans is a 700r4 with a Vigilante 2800 stall converter. The Engine Control Module (ECM) was a '92 TPI stock ECM (MAP/speed-density) with a modified EPROM.

I HAVE GONE TRU AND WILL PICKED OUT THE IMPORTANT POINTS TO SAVE YOU TIME IN THE CHARTs AND GRAPHS ON THE SITE

TPI engine.....283 PEAK rwhp @4800rpm peak
AVG. TQ 291.5
AVG HP 269.5



miniram
303 PEAK rwhp @6200rpm peak
AVG. TQ 285.8
AVG HP 269.1
IT LOST 29 HP at 3800 rpm and MADE 48 MORE HP THAN THE stock TPI at 6300 RPM


stealth ram
342 PEAK rwhp @6400rpm
AVG. TQ 319
AVG HP 300 it lost 28 hp at 3600 rpm BUT GAINED 66 HP AT 6600 RPM
over the stock TPI
342 rear wheel hp is aproximatly equal to 427 flywheel HP FROM A 350 SBC ENGINE, figuring a 20% driveline loss rate.

the use of a longer duration cam and only measureing PEAK HP would tend to benefit the miniram and STEALTH RAM intakes to a MUCH GREATER extent than the TPI, THATS HOW claims of gains of 100hp are made for some intake combos, while its TRUE that you can make in excess of a HUNDRED EXTRA hp at 6600rpms is due more to the TPI not being able to flow air (LOSSES) keep in mind that a LARGER ENGINE DISPLACEMENT WOULD BENEFIT EVEN MORE from the steathram

nitrusmr2

See the clay around the port? That is what they mean by a 3/8 radius inlet.

Aaron