MMS 220 Build for "Ghost Hawk"
Peak torque occurs when the cylinder pressure is at its highest point
That cylinder pressure does it’s best to force the rings against the cylinder walls with the lower end crankcase pressure working in opposition
At all the other points of the torque band is where the enhanced ring seal will show up since the air pump removes the ring fluttering Lower end pressure
Thus capturing more cylinder pressure on the north side of the piston. About 2.5 horsepower per cylinder
Additionally the oil rings perform better AND the secondary ring can scrape the bores more effectively. Thus less oil contamination which contributes to detonation. I wonder if you’re able to run a half to one more degree of timing without causing knock retard.
GREAT JOB with the build here !!!!!
That cylinder pressure does it’s best to force the rings against the cylinder walls with the lower end crankcase pressure working in opposition
At all the other points of the torque band is where the enhanced ring seal will show up since the air pump removes the ring fluttering Lower end pressure
Thus capturing more cylinder pressure on the north side of the piston. About 2.5 horsepower per cylinder
Additionally the oil rings perform better AND the secondary ring can scrape the bores more effectively. Thus less oil contamination which contributes to detonation. I wonder if you’re able to run a half to one more degree of timing without causing knock retard.
GREAT JOB with the build here !!!!!
Thread Starter
Joined: Jul 2014
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Likes: 1,873
From: My own internal universe
Thanks AR! And good catch. I did add two degrees of timing for the dyno but pulled it back out for the street. And no KR. If there was the operator didn't report it to me.
When you fully hook at the track and are moving all the weight that the engine’s acceleration rate is slowed down; and mostly in the higher gears when wind resistance also begins to add to the restriction
Since back in the mid nineties I’ve had Auto trans buddies pulling four degrees of timing out when clicking high gear and gaining 1.5-3 mph on mid 130s trapping cars.
Not sure if in your case you could leave the two in there but pull one out in the 2-3 Hundred RPM window of where you drop to after shifting. Or shift recover RPM I’ve heard it referred to
Thread Starter
Joined: Jul 2014
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From: My own internal universe
Originally Posted by A.R. Shale Targa
With how violently that thing lights the tires on the street it won’t see or need retard since there’s not enough resistance against the engine
When you fully hook at the track and are moving all the weight that the engine’s acceleration rate is slowed down; and mostly in the higher gears when wind resistance also begins to add to the restriction
Since back in the mid nineties I’ve had Auto trans buddies pulling four degrees of timing out when clicking high gear and gaining 1.5-3 mph on mid 130s trapping cars.
Not sure if in your case you could leave the two in there but pull one out in the 2-3 Hundred RPM window of where you drop to after shifting. Or shift recover RPM I’ve heard it referred to
When you fully hook at the track and are moving all the weight that the engine’s acceleration rate is slowed down; and mostly in the higher gears when wind resistance also begins to add to the restriction
Since back in the mid nineties I’ve had Auto trans buddies pulling four degrees of timing out when clicking high gear and gaining 1.5-3 mph on mid 130s trapping cars.
Not sure if in your case you could leave the two in there but pull one out in the 2-3 Hundred RPM window of where you drop to after shifting. Or shift recover RPM I’ve heard it referred to
Thread Starter
Joined: Jul 2014
Posts: 10,450
Likes: 1,873
From: My own internal universe
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Too bad a piston squirter kit wasn’t available. Could cool the undersides of slugs which rejects more BTU of heat back into the chamber. Allows even more detonation resistance to add timing.
Ya almost gotta wonder if 550 is achievable since you’re now 11 away...
Thread Starter
Joined: Jul 2014
Posts: 10,450
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From: My own internal universe
Originally Posted by A.R. Shale Targa
Worth a try for sure in light of the changes. Could leave it a bit fuel fat for safety while trying it. Rich makes horsepower and lean spikes torque but lean with timing wrecks pistons. You know all this
Too bad a piston squirter kit wasn’t available. Could cool the undersides of slugs which rejects more BTU of heat back into the chamber. Allows even more detonation resistance to add timing.
Ya almost gotta wonder if 550 is achievable since you’re now 11 away...
Too bad a piston squirter kit wasn’t available. Could cool the undersides of slugs which rejects more BTU of heat back into the chamber. Allows even more detonation resistance to add timing.
Ya almost gotta wonder if 550 is achievable since you’re now 11 away...
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Joined: Feb 2008
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From: TN
Saw what I didn't want to see when using stock fuel rail, how high above the manifold the center of crossover tube sits above groove in manifold at it's high point.
Looks like Back to the drawing board.
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From: Coast of San Mateo County Between Pacifica & HMB
11 Second Club
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From: Indiana
Good job Darth you're a beast! You would clear 550 with e85 alone.
A.R. here you go bud
https://www.briantooleyracing.com/pi...kit-37999.html
A.R. here you go bud
https://www.briantooleyracing.com/pi...kit-37999.html
Originally Posted by poorhousenext
That works for me.
Saw what I didn't want to see when using stock fuel rail, how high above the manifold the center of crossover tube sits above groove in manifold at it's high point.
Looks like Back to the drawing board.
Saw what I didn't want to see when using stock fuel rail, how high above the manifold the center of crossover tube sits above groove in manifold at it's high point.
Looks like Back to the drawing board.
Thread Starter
Joined: Jul 2014
Posts: 10,450
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From: My own internal universe
I think if I were gonna chase it, I'd need a new cam with a later IVC and more overlap.
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From: over dere