FrontEngineDragsters.Org Forum
Technical => Matt Shaff's Engine Shop => Topic started by: hotrod316 on November 19, 2013, 01:04:29 PM
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matt,
how do you feel about a bbc tall deck, (stock block) like a 509 for injected front motor DRAGSTER no more than 6700 rpm?
as always thanks for your time! steve m.
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Steve:
If your shooting for bigger ci. you can do it with a stock deck [9.800"].
The tall deck 427 truck blocks require intake spacers and a taller distributor if your going to use a stock height intake.
It is also a heavy block that will not yield much more cubic inch than a standard deck.
Your question needs more information to get a more complete answer.
We are on a front engine dragster site so I will assume that is the car of choice. ;)
I will throw some things at the wall and see if anything sticks:
1700Lb car/driver - Powerglide and a 5000 stall convertor - 4.30 rear gear and 33" tire.
I would build a .100" over bore 454 engine. [4.350 bore x 4.00" stroke = 475.5cubic inchs.]
A good set of over the counter heads like TrickFlow are a great bargin and make big power.
Camshaft with about 274 / 284* @.050" and 110* Lobe separation.
Stack injectors with alcohol and zoomies.
High 7s or low 8 second runs and no problems.
Put some more info up here and lets see what we can build.
Matt
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Hi Matt, Thanks for your response.
Yes this will be for a new front engine dragster that we are building. We currently run a 70's FED and have a stock 350 with stacks/zoomies and ran 33% nitro through it this year. Ran a 9.32 or something like that. We run 9.50s on just methanol. We are looking at new motor combinations for our second car.
Basically, we have 3 ways to go. We have a new 385 SBC with good short block to run 50% nitro. We also have a 427 4 bolt Truck tall block. Would put in a good bottom end as well for the good ole yeller!
To throw a monkeywrench is the third option. Which is a 6-71 blower setup for both the SBC and BBC. With the blower it will be injected methanol, no nitro.
I always thought the tall decks were good to make bigger inch motors than the std BBC. I am not too crazy on boring out blocks that big, (.100) scares me that the cylinder walls are getting awfully thin.
Goal for the new car is into the 8 second zone. nothing too crazy, we just like to go out play and have some fun.
Thanks for your time, truly appreciated.
steve and matt morgan
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Steve, My BBC was .125 over and filled just below the water pump holes....I would think running any substantial amount of stink would require the same.