5VZFE Cylinder head flow numbers
Jan 3, 2024 | 09:07 AM
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5VZFE Cylinder head flow numbers
I've been browsing the internet for 5VZFE flow numbers or 3VZFE flow numbers and i haven't found anything. I have found that a few members have ported the heads, but have no numbers.
On the 1MZ, I have a 2002 Article from Motor Trend that says a company GTE ported the 1MZ heads to 301CFM@.450" lift with a 35mm intake valve, that before they were 264CFM@.450" lift.
The 5VZ and 3VZ have the same bore spacing and a similar port and chamber design to the 1MZ heads, so the flow should be similar as 1mz. Stock 2JZ heads which have 33 intake valve vs the 34mm intake valve of the 1mz/5vz/3vz are said to flow around 230-240cfm @ .400" stock and there are many charts which show 200-220cfm@.300". That ported they are able to get 280-300cfm out of the heads.
I also have a data point that ported heads on a 3.0L or 3.5L that flow around 250cfm peak gain 25-30whp on a n/a app when they are ported to move 280-300cfm. If there was boost of 16psi or more that gain would be 100+whp with the ported heads.
Just looking for a flow chart of 3vz or 5vz heads unported and ported.
On the 1MZ, I have a 2002 Article from Motor Trend that says a company GTE ported the 1MZ heads to 301CFM@.450" lift with a 35mm intake valve, that before they were 264CFM@.450" lift.
The 5VZ and 3VZ have the same bore spacing and a similar port and chamber design to the 1MZ heads, so the flow should be similar as 1mz. Stock 2JZ heads which have 33 intake valve vs the 34mm intake valve of the 1mz/5vz/3vz are said to flow around 230-240cfm @ .400" stock and there are many charts which show 200-220cfm@.300". That ported they are able to get 280-300cfm out of the heads.
I also have a data point that ported heads on a 3.0L or 3.5L that flow around 250cfm peak gain 25-30whp on a n/a app when they are ported to move 280-300cfm. If there was boost of 16psi or more that gain would be 100+whp with the ported heads.
Just looking for a flow chart of 3vz or 5vz heads unported and ported.
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