Is anyone here experienced with a blower motor?
#439576
08/16/09 09:33 AM
08/16/09 09:33 AM
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Joined: Jan 2003
Posts: 2,581 Rutherfordton NC
BarryBum
OP
Fruit Of The Loon
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OP
Fruit Of The Loon
Joined: Jan 2003
Posts: 2,581
Rutherfordton NC
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Not an a/c blower either..... I am knocking around the idea of putting a blower on my 440 truck project, but I do not know much about them. I do know that the engine has to be near stock compression....right?? But like I said, I don't know much about them and around my area you don't see many at all. But the few that you do see around here never seem to run good. For instance, I saw one at a show yesterday and it was loading up, and smoking everywhere.......I felt sorry for the guy driving it because I knew he was getting upset.....and I remember another instance where a 48 Chevy truck with a blower was being run across an auction block at a sale I was at one time, they ended up having to push him across the block....so, those few examples being said............are these things streetable as a weekend cruiser that would only be driven once or twice a month? And fill me in on the details, since this blower would be on a 440 in a truck, I want it to stick way up out of the hood....how do I do that?
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Re: Is anyone here experienced with a blower motor?
[Re: In_The_Pink]
#439579
08/16/09 10:33 AM
08/16/09 10:33 AM
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Joined: Jun 2003
Posts: 3,325 Truckville, the capital of NY
85_Ram_4speed
master
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master
Joined: Jun 2003
Posts: 3,325
Truckville, the capital of NY
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Yes, very streetable. My friend has a 10-1 451 in a 71 Charger with a 8-71 blower and two holley 750's on it and you could drive it anywhere. I would not be afraid and get in and go to Carlisle (about 350 mi one way) or the nats in this thing. It gets about 10 mpg if you stay out of it, just about starts like it has fuel injection---heck we even started it when it was 10 degrees out side because we had to move it--and it still started and ran better than a regular carbed car. It even runs smoother than his 472 Hemi 69 Roadrunner he has. AS a side note, a blower on a 440 in a truck is not going to stick out of the hood a whole lot. I have seen them before, the carbs are about half way through the hood. I guess you could put an intercooler between the intake and blower for another coule inches, but unless you start raising the engine radically in the stock chassis, thats about where its going to sit.
Outcast Dodge guy.
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Re: Is anyone here experienced with a blower motor?
[Re: 85_Ram_4speed]
#439580
08/16/09 10:44 AM
08/16/09 10:44 AM
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Joined: Mar 2003
Posts: 4,848 Memphis
HemiRick
master
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master
Joined: Mar 2003
Posts: 4,848
Memphis
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A blower on a high compression motor (above 8 to 1) is a compromise. To get best performance the motor must be built low comp. to allow the blower to build some boost. Otherwise the blower has to run a huge top puley to keep its RPM down so it doesnt make much boost and is mainly for show.
Take care, Rick 68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451
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Re: Is anyone here experienced with a blower motor?
[Re: HemiRick]
#439581
08/16/09 11:10 AM
08/16/09 11:10 AM
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Joined: Jun 2003
Posts: 3,325 Truckville, the capital of NY
85_Ram_4speed
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master
Joined: Jun 2003
Posts: 3,325
Truckville, the capital of NY
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Quote:
A blower on a high compression motor (above 8 to 1) is a compromise. To get best performance the motor must be built low comp. to allow the blower to build some boost. Otherwise the blower has to run a huge top puley to keep its RPM down so it doesnt make much boost and is mainly for show.
This is also true if dealing with pump gas, but they do certianly run good with a little pop in them. Because my friends car was built originally at 10-1, he had to comprimise a little on the boost. I had a bone stock 400 with a measly 7.2 to 1 and about 8-10 psi of boost on a turbo. I was not disappointed in the least, but i would shoot for 8-9 to 1 with leaning towards the higher side if i was going to build something specific for the street and light strip use, running on pump 92 or better and doing full throttle/load blasts with it.
I looked long and hard at an 89 octane blower motor and you have to get it down to about 7 -7.5 to 1 with about 6 psi to do it. Remember, you are basically limited by the fuel you can use, or want to use.
Outcast Dodge guy.
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Re: Is anyone here experienced with a blower motor?
[Re: John_Kunkel]
#439583
08/16/09 08:34 PM
08/16/09 08:34 PM
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Joined: Jan 2003
Posts: 9,888 Weddington, N.C.
Streetwize
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master
Joined: Jan 2003
Posts: 9,888
Weddington, N.C.
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Built and have run several blower motors over the years...The BEST way is to build about 8.5:1 static compression WITH QUENCh which would incorporate a closed chamber aluminum head and a D dish blower piston. If I were to build one it would be a 440 block with a 3.90 stroke and a 7.100 rod or for a smallblock I would run the 3.79" stroke and the standard 6.125 rod. You can get addicted to the instant torque at any RPMand that 'mad max" jet engine like whine on the highway....it's really fun when there's a a slight mist in the air because it cools the inlet charge and the motor loves it. Fun, fun, the only downside to a rootes blower is "heat soak" whe nyou run it hard the boost will heat up the blower and it takes a long time to cool back down...great for drag racing where you have cool down between rounds but on the street it can can diminish the power an increase it's appetitie for octane.
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Re: Is anyone here experienced with a blower motor?
[Re: BarryBum]
#439584
08/16/09 09:32 PM
08/16/09 09:32 PM
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Joined: Jul 2005
Posts: 8,647 ELYRIA,OH
blownzoom440
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Joined: Jul 2005
Posts: 8,647
ELYRIA,OH
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my engine in my signature started with a smallish solid cam.549/.559 110 LSA[112LSA would be better] and 8.8cr and a BDS stage 2[hard anodized inside ]you will have a lot of fun. here is an old pic.
Last edited by METAL STORM; 08/16/09 09:37 PM.
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Re: Is anyone here experienced with a blower motor?
[Re: blownzoom440]
#439585
08/16/09 11:37 PM
08/16/09 11:37 PM
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Joined: Jun 2004
Posts: 3,319 Chicago Burbs
sthemi
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master
Joined: Jun 2004
Posts: 3,319
Chicago Burbs
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I did a Mild 440 with a 6-71 back in the late 70s. Used a Dyers blower, 1-1 drive, 7.5 Venolia Pistons... Ran great, only drivablility problem was cooling it.. Hd radiator, 3 fans and many different pulleys until I got it right.. Actually got reasonable mileage..and was very drivable..
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