351 vs 289 Dual Plane Firing Order

[DoneByDoug]

As the firing orders are different, will the Blue Thunder 289 Cobra Hi Rise dual plane manifold give maximum performance on a 302 block with a stroker crank that uses the 351 firing order? In theory dual plane runners are sequential so as each intake runner is 180 degrees apart in the firing order. I know it will fit, it's just getting maximum flow that concerns me.

[Keithc8]

It should work fine with the 351W firing order which is what most of the cams are using now.

Good luck, Keith

[PANAVIA]

If you are really concerned , you could put in dual O2 sensors and check for exhaust gas readings.

idle , off idle , 1000,1500,2000, -- - -on up.

Steve

[DoneByDoug]

Thanks to both. Steve, you're right. I should do that as it will tell if pulse reversion is starving certain banks/cylinders.

[Jerry Clayton]

so will a plug check---no welding, no buying more parts/tools that cost more than the cam/manifold