some 4150/4500 dyno info
05-15-2016 | 08:21 PM
#21
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From: On A Dirt Floor
Here is the quote from the Teague tech article that had me interested.
"Try the World Products Merlin X to accommodate a Holley 4500 series Dominator carburetor. The manifold works well out of the box and has brass inserts in the water passages to protect from corrosion. Select a two-circuit 1050 CFM carburetor. Three-circuit carburetors run rich in the midrange. Under the carburetor, install two 1-inch spacers. The top spacer should be a four-hole design, which lengthens the carburetor venturi and improves the booster signal.
This improved influence on the carburetor boosters will improve throttle response with the big carburetor. The spacer next to the intake manifold should be a cloverleaf design that improves the flow transition from the fourhole spacer to the intake manifold plenum..."
"Try the World Products Merlin X to accommodate a Holley 4500 series Dominator carburetor. The manifold works well out of the box and has brass inserts in the water passages to protect from corrosion. Select a two-circuit 1050 CFM carburetor. Three-circuit carburetors run rich in the midrange. Under the carburetor, install two 1-inch spacers. The top spacer should be a four-hole design, which lengthens the carburetor venturi and improves the booster signal.
This improved influence on the carburetor boosters will improve throttle response with the big carburetor. The spacer next to the intake manifold should be a cloverleaf design that improves the flow transition from the fourhole spacer to the intake manifold plenum..."
05-15-2016 | 10:19 PM
#23
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From: NW Michigan
The purpose of a 4 hole spacer is to protect the booster from the pulse that travels back up the intake port when the intake valve closes. If that pulse slams the booster you are in trouble. Fuel turns into a puddle in the bottom of the intake power goes down and detonation goes up. You really need a properly designed spacer to get the job done correctly. The HVH spacer looks cool but doesn't protect the booster.
Tried sending u a pm but your full
John
05-16-2016 | 01:27 PM
#25
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From: Western N.Y.
We were supposed to do a head to head comparison of 9.3 vs 9.7-8 but issues beyond our control prevented that. I should have that info when we're done but won't be able to use it for decision making. The first group of pulls with the 4150 intake were 9.7. The second group of pulls with the 4500 intake are 9.3. Cam is roughly 243/654.
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Last edited by bck; 05-16-2016 at 01:29 PM.
05-16-2016 | 03:24 PM
#29
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From: NW Michigan
You think your getting a VIP invite to cam room. Some go to their grave with those secrets. Ha... Don't worry I didn't get the magic numbers either. Needless to say it is a great thread with good info regardless. All I can say is going to dyno room with a truck full of goodies to try is a riot.
05-16-2016 | 03:44 PM
#30
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From: Western N.Y.
I gave the general specs he asked for. It's a shame we didn't get to do the head to head comparo on the half point of comp. But we had some obstacles crop up that prevented it.
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Straight bottoms and flat decks
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