hi, everyone
I built a strocker 7400 vortec (gen6 454) => 8L (489ci)
12cc dome piston
4.25 stroke
4.28 bore
0.027 cometic head gasket
comp cam xr264hr-13 (212 int 218 exh 113 lsa) @0.050 int open -5 BTDC close 37 ABDC @0.050 exh open 44 BBDC close -6 ATDC
stock 7400 vortec got compression ratio of (9.0-9.1:1) => now the statique compression ratio is 10.9:1
I built this engine to get good low end torque and use as tow rig
it idle good and AFR look good but a soon I load the engine it start to knock.
I don't have any knock detection device excepted 2 OEM knock sensor. I was thinking to buy a "link knock block" any recommendation?
I try 10-15 and 25 degree at load for low RPM but no luck it knock no matter what I do.
Did I when too crazy with this built and it need 93 only?
15 timing at cruise.hpt15 timing at cruise.hpl
10 timing 50-75 kpa.hpt10 timing 50-75kpa.hpl
normal timing table.hptnormal timing table.hpl