89 heads on an 84 motor

Violent84 · 06-04-2001, 07:30 PM

Yes they will fit but you should change the springs on them. Hydraulic Rollers tend to have more spring pressure b/c the valvetrain is heavier. On your flat tappet engine you may lose some power for the fact that the spring will be trying to close the valve faster on the lighter valvetrain. BTW, why do you wish to change your 84 heads for the 89's. The reason for Ford changing to the E7TE casting in 87 was to get a head that's construction was more like the 82-85 b/c the new 86 castings sucked.

later,
Violent

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84 GT-350, 2.5" Ram air hood, Centerline Pintails, 5-lug conversion, Recaro's, 140 speedo, 8.8 conversion, 3.73's, Motorsport A/C eliminator, Hurst shifter, ASP pulleys, Eibach pro kit, KYB's, Flowmaster exhaust, Long tubes, Flowtech off road h-pipe, .030 overbore, Extreme Energy 268, AFR 185's, CC Hi Tech Pushrods, CC Pro Magnum RR's, Pete Jackson Gear drive, 750 Speed Demon,Aeromotive 1000 hp pump, Aeromotive FPR, Aeromotive fuel filters,Weiand Xcelerator intake, Max Motorsports aluminum rack

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06-04-2001, 07:30 PM	#4
Violent84 Registered Member Join Date: Apr 2001 Location: Shenandoah, Va Posts: 34	Yes they will fit but you should change the springs on them. Hydraulic Rollers tend to have more spring pressure b/c the valvetrain is heavier. On your flat tappet engine you may lose some power for the fact that the spring will be trying to close the valve faster on the lighter valvetrain. BTW, why do you wish to change your 84 heads for the 89's. The reason for Ford changing to the E7TE casting in 87 was to get a head that's construction was more like the 82-85 b/c the new 86 castings sucked. later, Violent ------------------ 84 GT-350, 2.5" Ram air hood, Centerline Pintails, 5-lug conversion, Recaro's, 140 speedo, 8.8 conversion, 3.73's, Motorsport A/C eliminator, Hurst shifter, ASP pulleys, Eibach pro kit, KYB's, Flowmaster exhaust, Long tubes, Flowtech off road h-pipe, .030 overbore, Extreme Energy 268, AFR 185's, CC Hi Tech Pushrods, CC Pro Magnum RR's, Pete Jackson Gear drive, 750 Speed Demon,Aeromotive 1000 hp pump, Aeromotive FPR, Aeromotive fuel filters,Weiand Xcelerator intake, Max Motorsports aluminum rack