kiahatsiu wrote:32 psi might be a tad optimistic. Running a vf34 you should be fine on 20 psi. But the vf34 will fall over about 4500-5000 rpm, and not spool up until about 3000-3500...
dr20t wrote:Actually scratch that. On 98 you could probably run 20psi but would be knock limited
On e85 your knock threshold is alot higher (almost non existent) but cylinder pressures would be more concerning and with the high static comp of 9.5:1 on the ej20y/x, and low lift/ low duration cams (meaning high dynamic compression at low revs to peak torque), e85 with mean best timing will lift heads at lower boost than on 98
If you went to 20psi on e85 but kept timing low (ie 1 or 2 degrees higher than 98 timing level), then you would be fine. But taking full advantage of e85's knock resistance (meaning higher timing) with 20psi will have higher cylinder pressures than your stock motor will like for long
Mick
HardwareBoB wrote:I'm basically driving around a time bomb. 22psi ahoy.
Stevo1111 wrote:HardwareBoB wrote:I'm basically driving around a time bomb. 22psi ahoy.
Your a daring man living on the edge like that haha
HardwareBoB wrote:I'm basically driving around a time bomb. 22psi ahoy.
dr20t wrote:HardwareBoB wrote:I'm basically driving around a time bomb. 22psi ahoy.
That's mad
I ran 21.5psi on e85 for 15,000kms
Made 258awkw for a while haha
Cylinder pressures wouldve been friggen sky high
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