1974Roadrunner

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.

1966sportfury

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

67 GTX

you need to build the motor around the 671
you can't just put it on

1966sportfury

why?

1966sportfury

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,

67 GTX

this is what I was referring to
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?

1966sportfury

damn it someones got too!

67 GTX

haha

YellowDodge67

im looking into doing something like this too, does anything special have to be done to the ignition system, and does a "blower" cam have to be run or just a regular cam?

1966sportfury

you can run a stock cam, depends on what you want, stock will work fine tho

1974Roadrunner

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?

HEMI-ITIS

If you are starting with a stock block and rotating assembly,you need to figure out two thing first,what is your budget,,,,,,,,,,,and how much HP do you want to make???Also keep in mind what the rest of the drivtrain can handle

Kalaek

Hey guys,
I'm actually thinking of building a 440 with a hampton blower also. Does anyone know what company makes a rotating assembly for low compression?
thanks

mongo330

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

mongo330

[i recomend fordged dished blower pistons try SRP or arias

mongo330

[blowers usually run under 226 duration

TVLynn

Takes a lot of horsepower to turn that blower