12-16-2020, 08:19 PM

Mike Davis Mike Davis is offline

Ultimate Warrior

Join Date: Jun 2000

Location: Georgia

Posts: 2,056

Quote:

Originally Posted by Lee

One more question: Has anyone checked the springs on the HR version? Is .580" actually the max lift these can (safely) handle? I'm guessing a 1.800" IH?

Below is the response I got from Speedmaster on the springs.
They were installed at 1.800. They checked around 165lbs on the seat.

Mike,
Below are the specifications of the springs:

Number of Springs Per Valve: Dual
Outside Diameter of Outer Spring (in): 1.450 in.
Coil Bind Height (in): 1.060 in.
Damper Spring Included: No
Spring Rate (lbs/in): 135lbs @ 1.900 in.
Inside Diameter of Outer Spring (in): 1.080 in.
Inside Diameter of Inner Spring (in): .834 in.

Thanks Speedmaster Products

__________________
65 GTO, Tiger Gold, Nostalgia Super Stock 421, 2-Carter AFB carbs, Stock Suspension, 3550lbs Full Exhaust-- 9.70's@135

66 GTO (Retired race car)
421 CID
Multiple NSCA/NMCA World Champion

66 GTO 389 3x2, 4 speed, 3.90 gear, Montero Red 33K original Miles
67 GTO 2dr Post, 428, Tri Power, 3.55 Gears
80 Trans Am Black SE Y84 W72 WS6

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The Following User Says Thank You to Mike Davis For This Useful Post:
Lee

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