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Re: Comp height on 68-70 383 pistons
[Re: lewtot184]
#2746729
02/26/20 02:38 PM
02/26/20 02:38 PM
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Joined: Jan 2003
Posts: 14,506
So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,506
So. Burlington, Vt.
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Well...... that’s true....... but I don’t think I’d be running .100 preload either.
Just use the Lunati micro-trol lifters that use the tru-arcs to retain the plunger and run them at zero preload.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
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Re: Comp height on 68-70 383 pistons
[Re: fast68plymouth]
#2746788
02/26/20 05:17 PM
02/26/20 05:17 PM
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Joined: Jan 2004
Posts: 8,313
fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,313
fredericksburg,va
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Well...... that’s true....... but I don’t think I’d be running .100 preload either.
Just use the Lunati micro-trol lifters that use the tru-arcs to retain the plunger and run them at zero preload. And only stock .450 ish Lift, but they do cut it real close to that piston, they pushed for notches awhile back, nhra said no, the 383 would dominate the classes if they let them because that’s the biggest downside of running a 383, drop the piston or smaller cam. We can run solids lifters now on the hyd cams so that helps. And the LD340 intake for my ride, About 50 pounds lighter.
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Re: Comp height on 68-70 383 pistons
[Re: BSB67]
#2746811
02/26/20 06:06 PM
02/26/20 06:06 PM
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Joined: Jan 2003
Posts: 14,506
So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,506
So. Burlington, Vt.
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Valve notches are legal in SS....... but they probably weren’t always.
In Stock, at one point it was pretty common to hammer some reliefs into stock pistons with some junk heads and valves.
Then, NHRA made a rule against it.
No valve contact witness marks allowed on the pistons.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
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Re: Comp height on 68-70 383 pistons
[Re: cudaman1969]
#2746896
02/26/20 10:00 PM
02/26/20 10:00 PM
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Joined: Feb 2016
Posts: 201
PA
Scully
enthusiast
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enthusiast
Joined: Feb 2016
Posts: 201
PA
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Well...... that’s true....... but I don’t think I’d be running .100 preload either.
Just use the Lunati micro-trol lifters that use the tru-arcs to retain the plunger and run them at zero preload. And only stock .450 ish Lift, but they do cut it real close to that piston, they pushed for notches awhile back, nhra said no, the 383 would dominate the classes if they let them because that’s the biggest downside of running a 383, drop the piston or smaller cam. We can run solids lifters now on the hyd cams so that helps. And the LD340 intake for my ride, About 50 pounds lighter. The LD's not legal anymore.
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Re: Comp height on 68-70 383 pistons
[Re: Scully]
#2747061
02/27/20 01:10 PM
02/27/20 01:10 PM
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Joined: Jan 2004
Posts: 8,313
fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,313
fredericksburg,va
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Well...... that’s true....... but I don’t think I’d be running .100 preload either.
Just use the Lunati micro-trol lifters that use the tru-arcs to retain the plunger and run them at zero preload. And only stock .450 ish Lift, but they do cut it real close to that piston, they pushed for notches awhile back, nhra said no, the 383 would dominate the classes if they let them because that’s the biggest downside of running a 383, drop the piston or smaller cam. We can run solids lifters now on the hyd cams so that helps. And the LD340 intake for my ride, About 50 pounds lighter. The LD's not legal anymore. Easy come easy go I guess, $300 in the trash. That Pontiac guy was screaming blood murder to the upper honchos over nothing.
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Re: Comp height on 68-70 383 pistons
[Re: cudaman1969]
#2747073
02/27/20 01:42 PM
02/27/20 01:42 PM
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Joined: Feb 2016
Posts: 201
PA
Scully
enthusiast
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enthusiast
Joined: Feb 2016
Posts: 201
PA
|
Well...... that’s true....... but I don’t think I’d be running .100 preload either.
Just use the Lunati micro-trol lifters that use the tru-arcs to retain the plunger and run them at zero preload. And only stock .450 ish Lift, but they do cut it real close to that piston, they pushed for notches awhile back, nhra said no, the 383 would dominate the classes if they let them because that’s the biggest downside of running a 383, drop the piston or smaller cam. We can run solids lifters now on the hyd cams so that helps. And the LD340 intake for my ride, About 50 pounds lighter. The LD's not legal anymore. Easy come easy go I guess, $300 in the trash. That Pontiac guy was screaming blood murder to the upper honchos over nothing. Yeah, that Pontiac guy is one of a kind, they took away the LD for the 273 too.
Last edited by Scully; 02/28/20 11:14 AM.
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