Tall deck block feasible?
Thread Starter
Racer
Joined: May 2000
Posts: 429
Likes: 0
From: chagrin falls,oh,usa
Tall deck block feasible?
i'll be replacing the engine soon and have been lusting over some of the aftermarket blocks, especially those with the 9.3**" deck.
anyone with firsthand experience making this work? what problems?
thanks in advance
anyone with firsthand experience making this work? what problems?
thanks in advance
Safety Car
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
I know with the tall deck motor, the hood clearence is a problem.
This company said the 434 low deck verson will fit under the corvette hood .
Check it out http://www.ultrastreet.net/ultrastreet.asp
This company said the 434 low deck verson will fit under the corvette hood .
Check it out http://www.ultrastreet.net/ultrastreet.asp
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by REDC4CORVETTE
This company said the 434 low deck verson will fit under the corvette hood .
RACE ON!!!
Burning Brakes
Joined: Nov 2003
Posts: 914
Likes: 1
From: Redding Ca
The only reason I can think of for a tall deck is to install an ultra long rod or an ultra long stroke. I have never seen a "before and after" dyno test between long and short rod engines. But the conventional wisdom is a long rod motor is more detonation resistant and makes more power by virtue of staying at TDC longer. But I have never seen it proven in a dyno test. In a Reher Morrison editorial in Nat. Dragster (maybe a year ago) Buddy said there was no major advantage to the longer rod.
The down-side to a tall deck is a lot of new pricey parts are needed or might even have to be custom made: Timing chains, intake manifolds, exhaust header clearances. Some tall decks also have wider pan rails to accomodate longer strokes. This makes more custom parts like oil pans pretty pricey because the sales volume is low. Keep in mind, in Pro-stock and most big inch drag motors (up to about 555"), the standard deck is preferred by professional builders. Big bores, short strokes and standard decks are hot set up. Monster strokes where you just plain can't get the crank inside a standard deck block are the exception.
The down-side to a tall deck is a lot of new pricey parts are needed or might even have to be custom made: Timing chains, intake manifolds, exhaust header clearances. Some tall decks also have wider pan rails to accomodate longer strokes. This makes more custom parts like oil pans pretty pricey because the sales volume is low. Keep in mind, in Pro-stock and most big inch drag motors (up to about 555"), the standard deck is preferred by professional builders. Big bores, short strokes and standard decks are hot set up. Monster strokes where you just plain can't get the crank inside a standard deck block are the exception.
Last edited by GeosFun; May 5, 2005 at 11:29 AM.
Thread Starter
Racer
Joined: May 2000
Posts: 429
Likes: 0
From: chagrin falls,oh,usa
i know its not a GM block,( i didn't ask if there was one).
hood clearance is a non issue as there are scoops & bubbles, etc to provide that clearance.
i'm familiar with the tech why's and why not's related to the engine itself.
my concerns are in the area of frame clearance for exhaust, rocker cover clearance at the wiper motor and a/c box.
i'll restate my original question....anyone done it? what needs to be done to make it work?
hood clearance is a non issue as there are scoops & bubbles, etc to provide that clearance.
i'm familiar with the tech why's and why not's related to the engine itself.
my concerns are in the area of frame clearance for exhaust, rocker cover clearance at the wiper motor and a/c box.
i'll restate my original question....anyone done it? what needs to be done to make it work?
Safety Car
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
Mine hit the wiper motor.
I used a set of moroso alum valve covers with T&D shaft rockers.
I had to cut the back of the valve cover and notch it to clear.
I also had to use a spacer plate with the valve covers.
The A/C box made it harder to get to #8 plug only .
The 1 7/8 Stahl headers hit the floor board on the drivers side.
I a problem with clearencing the carb was ok but not the aircleaner.
Elkerts makes a 3 inch scoop.
I used a set of moroso alum valve covers with T&D shaft rockers.
I had to cut the back of the valve cover and notch it to clear.
I also had to use a spacer plate with the valve covers.
The A/C box made it harder to get to #8 plug only .
The 1 7/8 Stahl headers hit the floor board on the drivers side.
I a problem with clearencing the carb was ok but not the aircleaner.
Elkerts makes a 3 inch scoop.
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