440 + 671 blower
#1
440 + 671 blower
I recently bought a 78 440 out of a truck. It is going in my 74 RR that I have never got to drive
A friend of mine gave me a brand new 671 blower. I still have to buy all the attachments to mount this beast to my engine. Does anyone have any build ideas or experience? I am trying to build a street able monster on pump gas.
So far I plan on electric fan and I want to find an electric water pump and housing (to save some weight) but no luck yet. I would also like a nice roller cam. I plan on upgrading most internals.
A friend of mine gave me a brand new 671 blower. I still have to buy all the attachments to mount this beast to my engine. Does anyone have any build ideas or experience? I am trying to build a street able monster on pump gas.
So far I plan on electric fan and I want to find an electric water pump and housing (to save some weight) but no luck yet. I would also like a nice roller cam. I plan on upgrading most internals.
#2
A.K.A Bob Dodge
Join Date: Mar 2010
Location: couer d' alene id.
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The extent of the engine preparation will depend entirely on how the engine is to be used. A supercharger can be installed on a stock engine with cast pistons and a cast crank as long as moderate boost (below 8 lbs.) is maintained and any detonation is strictly controlled. Engine speed should also be limited to 5,000 rpm. Detonation on cast pistons can easily break ring lands. Too much boost and/or detonation on a stock or worn engine can cause piston damage or burned valves. Most late model "smog" engines work well with a supercharger due to their lower compression ratios and smaller cam profiles
#5
A.K.A Bob Dodge
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a blower,super charger, turbo all they are is just a air pump.(an engine is a air pump) no need to change things unless you want high levels of boost, factory is fine for the street,
#6
Mopar Lover
The extent of the engine preparation will depend entirely on how the engine is to be used. A supercharger can be installed on a stock engine with cast pistons and a cast crank as long as moderate boost (below 8 lbs.) is maintained and any detonation is strictly controlled. Engine speed should also be limited to 5,000 rpm. Detonation on cast pistons can easily break ring lands. Too much boost and/or detonation on a stock or worn engine can cause piston damage or burned valves. Most late model "smog" engines work well with a supercharger due to their lower compression ratios and smaller cam profiles
i wasn't sure what the compression was on his motor
I saw 78 block, but just didn't want to assume low compression
you are right, low boost will be ok
ripping on me a little, huh?
#11
I know I have to build the motor around using the 671. I was asking for inputs on how to build the motor around it. What kind of cam and head combo would have best bang for the buck. Would stroking it or leaving it a 440 be best? And what size carbs? Dual 750?
Or would I be better off selling it and just buying a good set of heads and cam?
Or would I be better off selling it and just buying a good set of heads and cam?
#12
Mopar Fan
Join Date: Jul 2010
Location: Great Neck,Long Island NY
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I know I have to build the motor around using the 671. I was asking for inputs on how to build the motor around it. What kind of cam and head combo would have best bang for the buck. Would stroking it or leaving it a 440 be best? And what size carbs? Dual 750?
Or would I be better off selling it and just buying a good set of heads and cam?
Or would I be better off selling it and just buying a good set of heads and cam?
#14
New Member
Join Date: Oct 2011
Location: PITTSFIELD MASSACHUSETTS
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blower motor
i ran a blower car for six years the two most important things are compression should be 8 or under with 7lbs of boost and stainless steel valves the blower creates a ton of heat stock weak valves will not hold up trust me
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