"Flow numbers"

[CaptCobrajet]

I sent a set of "Race" Medium Riser Ed Pro Ports to a new customer.  In talking with him prior, I could tell he had been around the block at least twice.  He asked me what they would flow, knowing that benches and methods vary.  I asked him to just trust me and try them.  He said he would, so we did them.  He owns a Superflow 600, so I suggested he flow them on his bench after he looked them over.  I prepped them for .700 lift.  He sent me his findings.  2.250 valve on a 4.310 fixture, 28". 

.300    232
.350    250
.400    280
.450    305
.500    332
.550    345
.600    360
.650    365

I thought I would post these third party(flowed by customer) numbers, since people always ask about numbers.  These quit at 370.  I could valvejob them differently and make them go about 15 more at .800-.850, but the application didn't warrant that. Exhaust went 266 up top.  These are about 15cfm better than the "Street" version that retains a MR location.  This port requires some intake work, pushrod tube relocation, and offset rockers, but still a "Medium Riser" style head. 

[feadam]

Will the new high risers have better numbers in and ex than this

[e philpott]

dang the  .300 to .500 lift  flow is amazing

[Drew Pojedinec]

dang the  .300 to .500 lift  flow is amazing

^ certainly nice for some easy going valve springs/longevity.  Great stuff.

[Galaxie505]

For those who don't know, Blair is a fe wizard!
I'm about to get back into my build using one of his motors and I'll post some pics soon

[351crules]

I sent a set of "Race" Medium Riser Ed Pro Ports to a new customer.  In talking with him prior, I could tell he had been around the block at least twice.  He asked me what they would flow, knowing that benches and methods vary.  I asked him to just trust me and try them.  He said he would, so we did them.  He owns a Superflow 600, so I suggested he flow them on his bench after he looked them over.  I prepped them for .700 lift.  He sent me his findings.  2.250 valve on a 4.310 fixture, 28". 

.300    232
.350    250
.400    280
.450    305
.500    332
.550    345
.600    360
.650    365

I thought I would post these third party(flowed by customer) numbers, since people always ask about numbers.  These quit at 370.  I could valvejob them differently and make them go about 15 more at .800-.850, but the application didn't warrant that. Exhaust went 266 up top.  These are about 15cfm better than the "Street" version that retains a MR location.  This port requires some intake work, pushrod tube relocation, and offset rockers, but still a "Medium Riser" style head.

what is the cross section of that port?   height and width?/

[CaptCobrajet]

1.950 tall, 1.710 wide with big radius corners.  Oval but almost round.....

[Falcon67]

dang the  .300 to .500 lift  flow is amazing

Where you wait it.  Peak flow is fun to bench race but the valve doesn't stay there but a blink.  Area under the curve is the game.

[gt350hr]

 Air flow measuring with the valve in motion and the vacuum and pressure provided by a crank rod and piston would be a real eye opener.

[shady]

For those who don't know, Blair is a fe wizard!
I'm about to get back into my build using one of his motors and I'll post some pics soon

In case you missed it Blair got mentioned in the latest HotRod mag.

[gt350hr]

   Well deserved and Jay's clear valve covers got ink in Car Craft too!

[351crules]

1.950 tall, 1.710 wide with big radius corners.  Oval but almost round.....

would that port require off set rockers/lifters?  is there a manifold that with go that wide without welding or bushing?  my vic doesn't seem to be able to get much more that 1.40" nwide without messing with it

[CaptCobrajet]

The Victor or TFS manifolds will work.  I plug the intake pushrod holes with solid aluminum and move the port over, then mill the pushrod hole where it needs to be.  I use offset Crower lifters and offset T&D rockers to keep the pushrod at no more than a 1° angle.  I think that is important to keep side thrust of the rocker to a minimum.

When BBM made the their tunnel wedge, I was involved, so I got him to add material in places to accommodate high port entry.  He also made some intakes without the intake pushrod holes drilled, so when using this head or others with ports moved over, that step is much easier and less costly. 

All of the intakes need the floors filled.  The BBM tunnel wedge really works out nice and makes really good power when fixed for this port.  I have gotten some stuff from Jay with no pushrod holes and no port hole.  Also have done some billet manifolds for this intake port.

[mbrunson427]

Here are a couple pictures of the heads Blair sent me before they got mailed out.



For comparison's sake.... a "street" pro port.

[351crules]

what do the street heads do on the bench