Blower on a stock 440 rebuild?

[1974dodgecharger]

Is it possible to install a mild blower on a stock 440 rebuilt engine? Engine is questions is a 440 pulled from a motorhome and rebuilt with stock configuration which the man believe is a 9:1 compression ratio. I asked becuase I was looking at superchargerusa.com website and they have a complete blower kit for 4500 dollars or less.

Im asking roughly 100HP extra out of the blower so nothing crazy.

[Cooter]

Superchargers, Like Nitrous and Turbo's are a great way to "Boost" (Pun intended) power. However, With boost comes ALOT more problems especially when running a carb. These days, with electronic fuel injection making blown engines pretty much a thing of the past by compensating to where even a dummy can run them, this isn't the case on early carb'd engines. Also, it's $4500.00 for the Supercharger, then Another $1200.00 for the "Blow Through" carb to run with the Supercharger. 9.1:1 is a little high to be boosting IMO.

Yes, people do it all day long on Late model Hemi's and such, but here again, the computer kinda helps even the biggest dummy from blowing his sh*t up too.

[elacruze]

Possible, yes.

If you only want 100hp over stock (which is about a HP440 level stock) you can add the blower if you underdrive it so you're only adding 10-20% displacement. If you put the carb(s) on top of the blower, you don't need more expensive blow-through carbs. Tuning should be fairly straightforward with low boost and suck-throughs.

If you want the proverbial 'no-go-showboat' you can do this, without expecting to blow anything up. You just have to keep the boost way down. Be sure to consult a cam engineer to tailor something to your requirements, which are quite different from most blower applications.

[1974dodgecharger]

I want more show than 'true' go in this case, but eventuallly rebuild it later of course say 4 years later. I dont want to go changing pistons and rods etc in this case, but will be more than willign to change out the heads and cams to get the rigth tune needed.

questions is will a mopar mechanic want to tackle such a job or will they suggest rebuild the motor from the ground up?

[elacruze]

As long as the pressure stays down, and the horsepower reasonable, and RPM below 6k, there's no reason you can't put a big silver fan on top of it. 500 blown HP would be a very good time, but shouldn't threaten the motor; your worst enemy is detonation, which is a function of cylinder pressure and spark timing-so you need to get serious about tuning your distributor.

[Cooter]

I want more show than 'true' go in this case, but eventuallly rebuild it later of course say 4 years later. I dont want to go changing pistons and rods etc in this case, but will be more than willign to change out the heads and cams to get the rigth tune needed.

questions is will a mopar mechanic want to tackle such a job or will they suggest rebuild the motor from the ground up?

I gotta spare 440 for when you put that crank on the pavement.

[elacruze]

I want more show than 'true' go in this case, but eventuallly rebuild it later of course say 4 years later. I dont want to go changing pistons and rods etc in this case, but will be more than willign to change out the heads and cams to get the rigth tune needed.

questions is will a mopar mechanic want to tackle such a job or will they suggest rebuild the motor from the ground up?

I gotta spare 440 for when you put that crank on the pavement.

Why do you feel the need to discourage a perfectly reasonable project with patronizing smart remarks?
There is no reason whatsoever you can't put a supercharger on a dead stock motorhome 440 and tune it to live.

[1974dodgecharger]

people will always pratonize somebody in this world its just how they view their own world 

If that 440 is free why not right 

I want more show than 'true' go in this case, but eventuallly rebuild it later of course say 4 years later. I dont want to go changing pistons and rods etc in this case, but will be more than willign to change out the heads and cams to get the rigth tune needed.

questions is will a mopar mechanic want to tackle such a job or will they suggest rebuild the motor from the ground up?

I gotta spare 440 for when you put that crank on the pavement.

Why do you feel the need to discourage a perfectly reasonable project with patronizing smart remarks?
There is no reason whatsoever you can't put a supercharger on a dead stock motorhome 440 and tune it to live.

peple will

[firefighter3931]

A buddy ran a Roots style 671 blower on a stock bottom end with forged pistons and mild boost and it ran fine. The key is to limit the boost to about 6-8psi and properly tune the ignition and fuel curve.

Any idea what pistons were used in this motor rebuild ?


Ron

[flyinlow]

A Buddy has a blown 402 in his 55 Belair. Stock bottom  end except for forged pistons. Runs about 6psi of boost on pump gas sucking thru an Eddy carb.  Good street cruiser and looks impressive.. As long as you can keep the detonation in check, it should work.   

[Chryco Psycho]

I agree there is no issue with running the blower , you can change tooth count to slow the blower down to keep boost in check . Just an expensive show piece !!

[1974dodgecharger]

A buddy ran a Roots style 671 blower on a stock bottom end with forged pistons and mild boost and it ran fine. The key is to limit the boost to about 6-8psi and properly tune the ignition and fuel curve.

Any idea what pistons were used in this motor rebuild ?


Ron

Hm..I will have to find out he told me they are 'stock' rebuild in a 'kit' form? As he put it its a 72 charger he has and the tranny rebuilt from AAMCO I believe. IM also curious since I wouldnt mind putting a blower on my vehicle also at low PSI as you recommended.

found out it bored it 30 over over the 440.....

[Cooter]

I want more show than 'true' go in this case, but eventuallly rebuild it later of course say 4 years later. I dont want to go changing pistons and rods etc in this case, but will be more than willign to change out the heads and cams to get the rigth tune needed.

questions is will a mopar mechanic want to tackle such a job or will they suggest rebuild the motor from the ground up?

I gotta spare 440 for when you put that crank on the pavement.

Why do you feel the need to discourage a perfectly reasonable project with patronizing smart remarks?
There is no reason whatsoever you can't put a supercharger on a dead stock motorhome 440 and tune it to live.

Basically? Because you, me, and the OP know damn good and well NOBODY installs a fu*ckin Blower on a stock 440 and "Doesn't get on it"...IT WILL BLOW THE F*CK UP sooner or later. I simply can't see why you guys seem to want to try tell some newbie that a stock 440 will live when he turns the wick up as you all know that's what's gonna happen sooner or later. NOBODY will cruise the street with a big 'ol huffer on their engine and NOT expect to get the inevidable "Challenge" from "Lesser" NON forced induction cars. Sure, I could tell him "Yeah, it'll live buddy go have some fun", but I know better and Believe it or not, I'm actually trying to help the OP from blowing some sh*t up.
My kid said the same thing, and installed a small turbo on his Mustang LX. Tried and tried to tell him he was gonna f*ck some sh*t up. NOOO, wouldn't listen to me as I didn't know anything compared to the Internet guru's on that Mustang site that told him he'd be just fine. Wanna take a guess at how he got to work today??
Hint: it wasn't in his Mustang anymore. He can talk that sh*t all day, but I know better. Blowers are for Adding power. 6-8 PSI isn't all that bad if you know what the hell you are doing. He blew it with only 7 PSI. STOCK engine.
Never thought to look at the stock 150K mile pistons/rods/crank etc. They said it would work...

But, since I'm the bad guy for telling what everybody is thinking, to all who seem to NOT see my signature, SEE THE SIG.

[404NOTFOUND]

It seems to me the OP is not interested in drag racing even on the street. If all he wants to do is look and sound good while cruising along and do some part throttle blasting for fun, then there shouldn't be a problem with a mild street blower. I know a few people doing that. Some of them drive literally at granny speed all the time.  When your car looks and sounds like that, you don't have to prove your speed to anyone. Actually, I'd like to do the same to my car but, I like to go to the track which means I would need to beef up the bottom end first.

[SRT-440]

If he keeps the boost down and puts an Alky Kit on it should be fine...of course turn the boost up and it will go pop. My stock bottom end V6 has lived with a big turbo and 26# of boost for a long time now and no problems...thanks to Alky injection.

But, if u were interested in making a lot of power I'd do a rebuild..and lower the compression and forged internals.

I say go for it.... 

[elacruze]

I want more show than 'true' go in this case, but eventuallly rebuild it later of course say 4 years later. I dont want to go changing pistons and rods etc in this case, but will be more than willign to change out the heads and cams to get the rigth tune needed.

questions is will a mopar mechanic want to tackle such a job or will they suggest rebuild the motor from the ground up?

I gotta spare 440 for when you put that crank on the pavement.

Why do you feel the need to discourage a perfectly reasonable project with patronizing smart remarks?
There is no reason whatsoever you can't put a supercharger on a dead stock motorhome 440 and tune it to live.

Basically? Because you, me, and the OP know damn good and well NOBODY installs a fu*ckin Blower on a stock 440 and "Doesn't get on it"...IT WILL BLOW THE F*CK UP sooner or later. I simply can't see why you guys seem to want to try tell some newbie that a stock 440 will live when he turns the wick up as you all know that's what's gonna happen sooner or later. NOBODY will cruise the street with a big 'ol huffer on their engine and NOT expect to get the inevidable "Challenge" from "Lesser" NON forced induction cars. Sure, I could tell him "Yeah, it'll live buddy go have some fun", but I know better and Believe it or not, I'm actually trying to help the OP from blowing some sh*t up.
My kid said the same thing, and installed a small turbo on his Mustang LX. Tried and tried to tell him he was gonna f*ck some sh*t up. NOOO, wouldn't listen to me as I didn't know anything compared to the Internet guru's on that Mustang site that told him he'd be just fine. Wanna take a guess at how he got to work today??
Hint: it wasn't in his Mustang anymore. He can talk that sh*t all day, but I know better. Blowers are for Adding power. 6-8 PSI isn't all that bad if you know what the hell you are doing. He blew it with only 7 PSI. STOCK engine.
Never thought to look at the stock 150K mile pistons/rods/crank etc. They said it would work...

But, since I'm the bad guy for telling what everybody is thinking, to all who seem to NOT see my signature, SEE THE SIG.

You're missing the whole point here. He doesn't want unreasonable power gains, he asked about 100hp, which is hardly any more than a stock HP 440 anyway. An underdriven blower at 1:1 displacement is nothing but a big shiny fan, and

*IF he stays within the parameters he claims to want*,

there is no reason to expect anything bad to happen.

[Rolling_Thunder]

Hey Cooter - why is it SRT68 here had an 8-71 on a stock bottom end 440 for over 5 years and it lived just fine? that's in front of a 4-speed and 18.5" wide tires....      

I would recommend a rebuild on any engine - but a stock RV 440 is low compression and with the amount of power he is looking for - it is not unreasonable.

I understand most people who bolt on a supercharger will drive it hard - but that doesnt mean it'll blow...    

[Cooter]

Hey Cooter - why is it SRT68 here had an 8-71 on a stock bottom end 440 for over 5 years and it lived just fine? that's in front of a 4-speed and 18.5" wide tires.... Yeah, and I've seen 302 Ford's with THREE N20 kits on 'em bombing over 500 HP on a stock, cast piston bottom end too..Doesn't mean I'm gonna recommend it to anybody. Light shines on a dog's ass every now and then.      

I would recommend a rebuild on any engine - but a stock RV 440 is low compression and with the amount of power he is looking for - it is not unreasonable.

I understand most people who bolt on a supercharger will drive it hard - but that doesnt mean it'll blow...Drive one hard with a supercharger and what you *think* is the correct tune-up and see what happens.    

[1974dodgecharger]

I can refrain myself trust me on this on the gas peddle I dont plan to street race or do anything of the sort YES huff and puff at the street light, but no more. I dont race at the track no more (too expensive) and I dont street race (learned my lessons in early age). Im more in the comsmetic of the blower than the actual street performance. There is obviously others into the look also a fake one look at

streetscoopers they have them on to fake others out on the street that they have a blower under the hood hidden. I saw it too many times and I dont criticize others no more for whatever reason. Its like telling someone they plan to spent 20k on a paint job and NOT enter contests and guess what they are perfectly happy NOT to. Its like you have a charger yourself people probably assume your a weekend driver because you dont want to hurt the car cause its so old.  We all assume on the net and NO your not the bad guy.

I want more show than 'true' go in this case, but eventuallly rebuild it later of course say 4 years later. I dont want to go changing pistons and rods etc in this case, but will be more than willign to change out the heads and cams to get the rigth tune needed.

questions is will a mopar mechanic want to tackle such a job or will they suggest rebuild the motor from the ground up?

I gotta spare 440 for when you put that crank on the pavement.

Why do you feel the need to discourage a perfectly reasonable project with patronizing smart remarks?
There is no reason whatsoever you can't put a supercharger on a dead stock motorhome 440 and tune it to live.

Basically? Because you, me, and the OP know damn good and well NOBODY installs a fu*ckin Blower on a stock 440 and "Doesn't get on it"...IT WILL BLOW THE F*CK UP sooner or later. I simply can't see why you guys seem to want to try tell some newbie that a stock 440 will live when he turns the wick up as you all know that's what's gonna happen sooner or later. NOBODY will cruise the street with a big 'ol huffer on their engine and NOT expect to get the inevidable "Challenge" from "Lesser" NON forced induction cars. Sure, I could tell him "Yeah, it'll live buddy go have some fun", but I know better and Believe it or not, I'm actually trying to help the OP from blowing some sh*t up.
My kid said the same thing, and installed a small turbo on his Mustang LX. Tried and tried to tell him he was gonna f*ck some sh*t up. NOOO, wouldn't listen to me as I didn't know anything compared to the Internet guru's on that Mustang site that told him he'd be just fine. Wanna take a guess at how he got to work today??
Hint: it wasn't in his Mustang anymore. He can talk that sh*t all day, but I know better. Blowers are for Adding power. 6-8 PSI isn't all that bad if you know what the hell you are doing. He blew it with only 7 PSI. STOCK engine.
Never thought to look at the stock 150K mile pistons/rods/crank etc. They said it would work...

But, since I'm the bad guy for telling what everybody is thinking, to all who seem to NOT see my signature, SEE THE SIG.

[1974dodgecharger]

THANKS elacruze for reading my posts I dont think cooter is reading what I want IM NOT FAST AND FURIOUS WHERE I LIVE MY LIFE A QUARTER MILE AT TIME AND HAVE A 900HP DETROIT MUSCLE SITTING MY GARAGE.

YES only 100HP and YES more for comsmetic than peformance unlike Vin Diesel 

I want more show than 'true' go in this case, but eventuallly rebuild it later of course say 4 years later. I dont want to go changing pistons and rods etc in this case, but will be more than willign to change out the heads and cams to get the rigth tune needed.

questions is will a mopar mechanic want to tackle such a job or will they suggest rebuild the motor from the ground up?

I gotta spare 440 for when you put that crank on the pavement.

Why do you feel the need to discourage a perfectly reasonable project with patronizing smart remarks?
There is no reason whatsoever you can't put a supercharger on a dead stock motorhome 440 and tune it to live.

Basically? Because you, me, and the OP know damn good and well NOBODY installs a fu*ckin Blower on a stock 440 and "Doesn't get on it"...IT WILL BLOW THE F*CK UP sooner or later. I simply can't see why you guys seem to want to try tell some newbie that a stock 440 will live when he turns the wick up as you all know that's what's gonna happen sooner or later. NOBODY will cruise the street with a big 'ol huffer on their engine and NOT expect to get the inevidable "Challenge" from "Lesser" NON forced induction cars. Sure, I could tell him "Yeah, it'll live buddy go have some fun", but I know better and Believe it or not, I'm actually trying to help the OP from blowing some sh*t up.
My kid said the same thing, and installed a small turbo on his Mustang LX. Tried and tried to tell him he was gonna f*ck some sh*t up. NOOO, wouldn't listen to me as I didn't know anything compared to the Internet guru's on that Mustang site that told him he'd be just fine. Wanna take a guess at how he got to work today??
Hint: it wasn't in his Mustang anymore. He can talk that sh*t all day, but I know better. Blowers are for Adding power. 6-8 PSI isn't all that bad if you know what the hell you are doing. He blew it with only 7 PSI. STOCK engine.
Never thought to look at the stock 150K mile pistons/rods/crank etc. They said it would work...

But, since I'm the bad guy for telling what everybody is thinking, to all who seem to NOT see my signature, SEE THE SIG.

You're missing the whole point here. He doesn't want unreasonable power gains, he asked about 100hp, which is hardly any more than a stock HP 440 anyway. An underdriven blower at 1:1 displacement is nothing but a big shiny fan, and

*IF he stays within the parameters he claims to want*,

there is no reason to expect anything bad to happen.

[flyinlow]

I can refrain myself trust me on this on the gas peddle I dont plan to street race or do anything of the sort YES huff and puff at the street light, but no more.[. ]

That's good, because we are all just throwing in our  .  In the end ,you are the one that guarantee's the engine. Hows the divetrain? with that much more torque it will need to be up to the task.


If you do this, we will need pictures of course. 

[1974dodgecharger]

I can refrain myself trust me on this on the gas peddle I dont plan to street race or do anything of the sort YES huff and puff at the street light, but no more.[. ]

That's good, because we are all just throwing in our  .  In the end ,you are the one that guarantee's the engine. Hows the divetrain? with that much more torque it will need to be up to the task.


If you do this, we will need pictures of course. 

thx man....the drivetain is rebuilt also same time as engine.

[BY RSCO]

I have messed with a bunch of blower setups, and a bunch of nitrous setups and will say this (keep in mind, I am NOT an engine builder, but did the tuning thing for a pretty good bit) - there is always the possibility of engine failure with ANY setup, and yes, you do raise that risk when adding any performance mods, especially a power adder. That being said, tuning is the key as mentioned - do not get greedy with boost OR timing and it will decrease your chances a lot of problems. Thing about it is this - put it on, have it tuned if you do not have the knowledge in this area, and enjoy it - it if fails, just an excuse to build bigger and better. When still in the Mustang world, I had blowers on two street cars making over 500hp to the tires on stock shortblocks. That is honestly a ticking time bomb, but I keep the tune safe and also had a lot of luck. Odds are with that small amount of boost and a proper tune you should be able to enjoy it for a while. Please feel to agree, or disagree.

[FLG]

Heres my 

One major MAJOR part of running a boosted engine, is one word...TUNE.

Your stock 440 will be much more forgiving with a bad tune, your boosted aplication simply will not. I can bet most boosted engine failures are not due to parts being inferior, but rather people not tuning things correctly.

If tuned right, it will be fine.

[1974dodgecharger]

WOW 3 years ago, lmao...now here Iam in 2 weeks Im gonna put a blower on a rebuilt 383 instead of the 440 I wanted.....almost there