Forced Induction headwork..
The only graph I have seen is one where there was just a 15% increase in fuel, no other tuning, spool up was 300-500 RPM quicker depending on where you measure it, beginning or end of spool up.
Final tuning about doubled the gains over just fuel add so spool maybe a little quicker than that.
Hoping to get all the data and a review from the user in a couple of days.
Final tuning about doubled the gains over just fuel add so spool maybe a little quicker than that.
Hoping to get all the data and a review from the user in a couple of days.
RESULTS!!!
2.0L built S2000, 9.0 CR.
Baseline is stock head @ 16.5 psi
2nd line is URGE/Endyn head @ 16.5 psi
3rd line is URGE/Endyn head @ 18 psi
[attachment=33756:endyn-head-work_TURBO.jpg]
@ 16.5 psi, about 25-60 HP & 25-40 ft-lbs gains through out
500 RPM quicker spool (air velocity)
25 HP gains below spool up
Again, this is all with stock valve sizes!!! We stay at stock valve sizes to keep air velocity up which equates to the faster spool and gains below spool up.
The S2000 ports are already too big and making them bigger to gain flow will reduce spool up, even though it will make more power up top
The key is increasing flow (top end HP) AND velocity (spool up and low/mid torque)
Here is the flow chart for this head. 13% IN gain, 30% EX gain.
2.0L built S2000, 9.0 CR.
Baseline is stock head @ 16.5 psi
2nd line is URGE/Endyn head @ 16.5 psi
3rd line is URGE/Endyn head @ 18 psi
[attachment=33756:endyn-head-work_TURBO.jpg]
@ 16.5 psi, about 25-60 HP & 25-40 ft-lbs gains through out
500 RPM quicker spool (air velocity)
25 HP gains below spool up
Again, this is all with stock valve sizes!!! We stay at stock valve sizes to keep air velocity up which equates to the faster spool and gains below spool up.
The S2000 ports are already too big and making them bigger to gain flow will reduce spool up, even though it will make more power up top
The key is increasing flow (top end HP) AND velocity (spool up and low/mid torque)
Here is the flow chart for this head. 13% IN gain, 30% EX gain.












