Head Flow Testing of the AllPontiac Tiger Head by DCI

The head was tested on a SuperFlow 600 flow bench. All measurements are at 28 inches of water. Outside temperature was 70 degrees, the flow bench temperature was 155 degrees and the relative humidity was 62 percent. The test fixture bore sizes was 4.250 inches. This is a as cast head with just a little clean up. Not ported by a machine.

Valve Lift / Intake CFM / Exhaust CFM / Int/exh Flow Percentage
.100 76.50 63.20 82.61
.200 144.55 111.80 77.37
.300 207.97 161.00 77.41
.400 267.00 196.40 73.55
.500 315.95 230.20 72.85
.600 358.20 252.20 70.40
.700 388.05 264.30 68.10
.800 411.93 269.20 65.35
.850 417.90 269.20 65.85
.900 422.37 276.50 65.46

Intake Valve was 2.250 Dia. And the exhaust was 1.800 Dia.

This Post will be were we will post all Data from the test good or bad. I will start to receive date late today and post it as soon as I can.

Head Flow Testing of the AllPontiac Tiger Head by DCI

The head was tested on a SuperFlow 600 flow bench. All measurements are at 28 inches of water. Outside temperature was 70 degrees, the flow bench temperature was 155 degrees and the relative humidity was 62 percent. The test fixture bore sizes was 4.250 inches. This is a as cast head with just a little clean up. Not ported by a machine.

Valve Lift / Intake CFM / Exhaust CFM / Int/exh Flow Percentage
.100 76.50 63.20 82.61
.200 144.55 111.80 77.37
.300 207.97 161.00 77.41
.400 267.00 196.40 73.55
.500 315.95 230.20 72.85
.600 358.20 252.20 70.40
.700 388.05 264.30 68.10
.800 411.93 269.20 65.35
.850 417.90 269.20 65.85
.900 422.37 276.50 65.46

Intake Valve was 2.250 Dia. And the exhaust was 1.800 Dia.

This Post will be were we will post all Data from the test good or bad. I will start to receive date late today and post it as soon as I can.

Which exhaust port?
Raised?
Exh. port Size?

Dude, It was a Std. Height Round Port Exhuast with a 1.800

http://forums.performanceyears.com/g...icon_smile.gif

Im setting on the edge of my chair.

This is probably a stupid street car guy question, but I was surprised the flow numbers were pretty much like the KRE heads and the eheads up to .500-.600 lift. Can you actually have a motor with .900 lift?

yes

Stupid question or .900 lift motor http://forums.performanceyears.com/g...icon_smile.gif

.900 lift cam

Bob -- Have there been any test on port velocity, and if so do you have numbers you can release.

Looking good Bob, great potential.

The intake #s are really good. What do you think the exhaust flow nunbers can get to ported out?

The numbers above are as cast std. round port. The heads that we are testing on the dyno are High round ports. I do not have those numbers but, they are more in line to 80% of the intake or more.

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by gearbanger:
Can you actually have a motor with .900 lift? <HR></BLOCKQUOTE>


real street winner has over .900 lift in his motor

Dave,you thinking about going after that ford now?LOL,Tom

So do you have any idea what the heads flow that are on your engine now? The numbers you posted are what was published in HPP in Oct of 2003.

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by gearbanger:
This is probably a stupid street car guy question, but I was surprised the flow numbers were pretty much like the KRE heads and the eheads up to .500-.600 lift. Can you actually have a motor with .900 lift? <HR></BLOCKQUOTE>

Show me an Edelbrock head that flows 358-cfm @ .600" THAT ISN'T A WIDE PORT THAT HAS BEEN CNC PORTED and I'll show you a bridge for sale in Brooklyn. http://forums.performanceyears.com/g.../icon_wink.gif

Pretty DARN good flow numbers if you ask me!! http://forums.performanceyears.com/g.../icon_cool.gif

How is the testing going?

LOL...its now in a PRO Stock firebird LOL!!!
real street winner has over .900 lift in his motor[/QUOTE]