Flow numbers for the 2011 5L Stock Heads.

[SStang]

Does anyone have the numbers, and has any of the vendors released any ported heads?

Thanks.

 

[Matt D]

Livernois flowed a set I beleive it was 311 if memory serves me right

They are working on a CNC program for it now I am sure..

 

[kyoshosp2]

They sure are LOL

 

[Livernois Motorsports]

The stock head flowed 311.8 on the intake at .600 lift and 178.8 on the exhaust side at .450 lift at 28" H20 on our SuperFlow 1020 Bench.

We are still developing ports, but here is a stage 1 port

Regards,

Rick LeBlanc
Livernois Motorsports

 

[Matt D]

The stock head flowed 311.8 on the intake at .600 lift and 178.8 on the exhaust side at .450 lift at 28" H20 on our SuperFlow 1020 Bench.

We are still developing ports, but here is a stage 1 port

Regards,

Rick LeBlanc
Livernois Motorsports

and... there you have it

Great stuff Rick!

 

[Livernois Motorsports]

and... there you have it

Great stuff Rick!

Great memory as far as the stock numbers Matt

-Rick

 

[kyoshosp2]

Yep right from the Source. any Avali time or price on stage 1... ? you can PM me

 

[JDM74]

Why was lift held to .450" on the exhaust size? Just curious.

 

[Livernois Motorsports]

Yep right from the Source. any Avali time or price on stage 1... ? you can PM me

Currently, we don't have a source for new or core heads, so it would require a customer core.

If you sent you bare/clean heads, the machine work would be $999 + shipping.

Thank you,

Rick LeBlanc
Livernois Motorsports

 

[kyoshosp2]

you'd re assemble them so id just have to bolt them on? what kinda power might i see?

 

[2005mach1]

Currently, we don't have a source for new or core heads, so it would require a customer core.

If you sent you bare/clean heads, the machine work would be $999 + shipping.

Thank you,

Rick LeBlanc
Livernois Motorsports

Great - may have to do that soon

 

[DennyMcLain]

Brand new to this list never owning a Ford Mustang (bought one for my son.) However, a car guy not hung up on brand that likes fast cars always looking for a new fix and frankly always loving the older Mustangs. Somewhat salty on the hot rod stuff having been a former sponsored racer.

Impressed with the posts on this list and it appears the Ford guys seem to have their act together. Seriously consider buying a new Mustang as Ford has done wonderful job on with the 2011 car.

The flow numbers in the intake are quite good for the ci and stock heads, (Ford always has had great heads) but the exhaust numbers seem really low to me based upon past experience. Pretty familiar with flow benches and the intake to exhaust ratio appears low admitting that I basically know little about Ford engines.

Love to see the entire flow sheets plus intake cc volume. Are the heads going into turbulence at flow numbers above .450 or is Ford sandbagging like GM did with the Z06 cutting down on the exhaust numbers using smaller exhaust valves? Can’t imagine any factory at this time and age having heads that have turbulence issues at higher lift levels.

Also after your CNC program what are you realistically looking at real world flow numbers? A buddy of mine used to do Pro Stock engines and I always take heads to him to verify flow numbers and final tweaking. I’ve found variances from what I was suppose to get, but this list seems to be pretty stand up.

 

[US-1]

...but the exhaust numbers seem really low to me based upon past experience. Pretty familiar with flow benches and the intake to exhaust ratio appears low admitting that I basically know little about Ford engines.

Love to see the entire flow sheets plus intake cc volume. Are the heads going into turbulence at flow numbers above .450 or is Ford sandbagging like GM did with the Z06 cutting down on the exhaust numbers using smaller exhaust valves?

I personally have not had a set of these in my hands to try them out but just from looking at the pictures I'm wanting to say it is the round exhaust port causing the problem. Wondering if the port would respond from being "D-ported" like the two valve head did.

 

[JDM74]

I'd like to see the factory cam specs on lift and especially duration. I imagine the exhaust side is being held open longer.

 

[jeff s]

Lift is .470" intake and .432" exhaust.

Thought I saw the duration specs somewhere too, but can't recall...

 

[DennyMcLain]

I'd like to see the factory cam specs on lift and especially duration. I imagine the exhaust side is being held open longer.

Typically the exhaust to intake flow ratio is the main factor in determining the split in camshaft duration but you need the whole picture to get a better idea of where you’re at. Also one of the reasons I was curious to see the actual flow sheets is what really counts is average flow during the actual lift of the cam. In other words, who cares what’s at .700, if you can only lift the valve .550. There are ways of undercutting the valves to give better high end or low end flow.

 

[JDM74]

Typically the exhaust to intake flow ratio is the main factor in determining the split in camshaft duration but you need the whole picture to get a better idea of where you’re at. Also one of the reasons I was curious to see the actual flow sheets is what really counts is average flow during the actual lift of the cam. In other words, who cares what’s at .700, if you can only lift the valve .550. There are ways of undercutting the valves to give better high end or low end flow.

I agree, peak flow is only part of the picture, flow at low lift is critical to overall cylinder filling.

 

[DennyMcLain]

I agree, peak flow is only part of the picture, flow at low lift is critical to overall cylinder filling.

In looking at flow sheets the first two things I personally immediately look at is flow @.400 and CC volume of the intake ports. Lot of flow out of huge ports isn’t necessarily a good thing but huge flow out of smaller volume ports is a great thing. Then I look at the rest of the sheet. Flow at very low lift is indicative of how well the valve job was performed.

Seriously, love to see an entire flow sheet trying to plan ahead on what to do. Honestly went through a dozen different camshafts and three sets of heads in a Corvette to find the right combo and I’d rather not do it again. But it certainly was a learning experience to say the least.

 

[JDM74]

In looking at flow sheets the first two things I personally immediately look at is flow @.400 and CC volume of the intake ports. Lot of flow out of huge ports isn’t necessarily a good thing but huge flow out of smaller volume ports is a great thing. Then I look at the rest of the sheet. Flow at very low lift is indicative of how well the valve job was performed.

Seriously, love to see an entire flow sheet trying to plan ahead on what to do. Honestly went through a dozen different camshafts and three sets of heads in a Corvette to find the right combo and I’d rather not do it again. But it certainly was a learning experience to say the least.

High flow with big intake runners = lazy heads. High flow with small intake runners = great heads. To really get the VE up you need good flow at low lift. Let the air's velocity fill the chamber. That makes for good VE.

Doing R & D on your own dime sucks. I did something very similar on my Firebird a while ago.

 

[assasinator]

rick, what are the flow number for the stage I ?