School me on supercharging a 360

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Coyote Jack

Coyote Jack

Member #55, I'm old
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I have been doing a little thinking on my next project. I have thought about a Viper drivetrain, a elephant Hemi and now a supercharged smallblock. Just weighing all the alternatives and still maintain the wow factor. I am sure most any 360 block would do. But after that I am lost. I figure a forged crank and a girdle would probably be a must along with forged pistons and better rods. Heads I have no clue on. I think something like a 6/71 blower with 2 smaller blow through carbs is probably the ticket. There are other factors that I know nothing about. Ie: exhaust, ignition timing, cam choice and any other items you can think of. One question I have always thought about is, what happens when you get caught in the rain with a blower sticking out of the hood?

I suppose I would be looking for something in the 550 to 600 HP range.

Any help would be appreciated.

Jack
 
Heads I have no clue on. I think something like a 6/71 blower with 2 smaller blow through carbs is probably the ticket. There are other factors that I know nothing about. Ie: exhaust, ignition timing, cam choice and any other items you can think of. One question I have always thought about is, what happens when you get caught in the rain with a blower sticking out of the hood?
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Heads won't matter since your forceing in the air. While yes higher flowing heads will perform better than not and ported even better etc....

A 6/71 will not use "Blow through" carbs. They will use a carb designed to sit up top for best results. The carbs still draw air through themslefs.

Otherwise, the ignition should have a boost retard set up. Supercharger cams. I have seen advice to use a wider centerline cam to help build the pressure up.

Getting caought in the rain? Drive on!
 
Like I said rumble, I know next to nothing on this type of setup. I thought that all blowers used blow through carbs, but after thinking about it some more, that would be the type of carb a Paxton would use as opposed to a roots type blower would it not?

Wouldn't the blower have a tendancy to suck in rain water if it's sticking out of the hood?

Jack
 
Why not build a stroker Jack?You can maintain your stock look with a pretty stout smallblock.Anything in the 600hp area I would advise searching for a R3 block.Good Luck with your goals.:read2:
 
Coyote Jack said:
Like I said rumble, I know next to nothing on this type of setup. I thought that all blowers used blow through carbs, but after thinking about it some more, that would be the type of carb a Paxton would use as opposed to a roots type blower would it not?

Wouldn't the blower have a tendancy to suck in rain water if it's sticking out of the hood?

Jack
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I personally like a blow-through set up. Something about compressing fuel and detonation happening in something that sticks above the hood line scares the crap out of me! When it comes to forced induction I like to keep the fuel out of the impeller/turbine,just seems safer.But I also prefer turbos to superchargers 9/10 times. V8's have no problem with bottom end torque,which is the only benifit that a supercharger has over a turbo.

As for rain getting in,thats why you run a carb hat with a filter!
 
Well Jack, I know some basics about doing something like this. The paxton supercharger or a turbo use a blow through carb since that is how it is set up. The supercharger is blowing/forcing air through the carb.

On a 6/71 roots blower, the carbs sit on top of the supercharger and the carbs have air pulled from underneath by the engine/supercharger. They (The aftermarket) have designed carbs for both applications.

You could use just plain ol'stock OOTB carbs, Holley or AFB's on top of the 6/71, but for best results, a carb designbed for this application will get a good bit more power.

Sucking in water isn't a big thing. How much the engine is ingesting is. I see where this is of concern for you. I would not worry about this. If there was any concern (Or care) to being caught in the rain, then a scoop that I could flip around would be my problem solver.
 
rumblefish360 said:
Well Jack, I know some basics about doing something like this. The paxton supercharger or a turbo use a blow through carb since that is how it is set up. The supercharger is blowing/forcing air through the carb.

On a 6/71 roots blower, the carbs sit on top of the supercharger and the carbs have air pulled from underneath by the engine/supercharger. They (The aftermarket) have designed carbs for both applications.

You could use just plain ol'stock OOTB carbs, Holley or AFB's on top of the 6/71, but for best results, a carb designbed for this application will get a good bit more power.

Sucking in water isn't a big thing. How much the engine is ingesting is. I see where this is of concern for you. I would not worry about this. If there was any concern (Or care) to being caught in the rain, then a scoop that I could flip around would be my problem solver.
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Turbos can also be draw through!
 
Blow through carb superchagers can be found here. http://www.vortechsuperchargers.com/

Blowers/6-71's can be found here, they draw air from under the carb. http://blowerdriveservice.com/

6/71 styled "Roots" superchargers are known for lots of torque on demand right now from idle to ....... and there very hard on the crank and it's attaching parts.

The "Hair dryer" styled supercharger and turbos are not as strong from the get go but will come up very well and strong. There intail "Hit" on the engine is softer. There alot easier on the lower end of the engine.

While I like the idea of a turbo, it is a little more complex in building due to more pipeing. I myself have not seen any bolt on kits with brackets and such.

SCDE could really shed some light on this area.
 
Yes! Indeed they can. When was the last time you seen one muchless seen them or in a kit form.
 
Its true a turbo is a bit more complex. No kits but its not hard to build one. You can get intercooler kits off of ebay and it comes with an assortment of pipes that you can cut to make work. I have seen guys flip a set of shorty style headers,otherwise you will have to build your own. But rear mount turbos are also an option now.
 
rumblefish360 said:
Yes! Indeed they can. When was the last time you seen one muchless seen them or in a kit form.
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Last weekend at a car show on a 65 mustang with an inline 6. I also know of a few of them laying around in friends garages/shops. Also seen a few on some slant sixes runing pretty well.

Do you always build from kits? Scared of a little ingenuity? I would not use a draw through turbo or supercharger like I have stated above,my point was that there are more options than you listed.

"The paxton supercharger or a turbo use a blow through carb since that is how it is set up"

It was this statement that triggered my comment.
 
I have only seen rear mounted turbos for the trucks, not old school cars. System looked cool though.
An intercooler is a great add on, a bit expensive, but a worthy add on. They can be had for the 6/71's as well. The additional 4 inchs in height aint so great, but that's how they do it.
 
Rear mounted turbos are not application specific. The make them for Vipers and Vettes,could be easily adapted to and old car. Saw a 68 camaro at a car show with rear mounted turbos,I think it was a year one car or something of the like.

For the intercoler, with a turbo they are cheap. You can get a kit for under 200 with the piping,and its a front mount so you can still see over you hood after you install it:-D


On a side note I saw a bad *** vid on you tube of a guy with a blown 2g Hemi,it was intercooled and you couldnt even see into the car from the front! I guess you dont need to see to go in a straight line huh!
 
[QUOTE said:
Grinder;1002247]Last weekend at a car show on a 65 mustang with an inline 6. I also know of a few of them laying around in friends garages/shops. Also seen a few on some slant sixes runing pretty well.
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I'd like a picture of that. It sounds preety cool.
I guess Fla. has a big host of used and outdated systems, I've never seen one layin around here. I have seen 1 or 2 on cars here though. Very old styuff.

Do you always build from kits?
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Never have. But then sometimes, the easy way out is not only easy, but all the work is done for you. Sometimes, when you know little or nothing of the system or etc.... This would be a bennifit.

Would I do a kit for a charger system. On a 6/71, not really, just the kit to bolt it all up and get going. No sense of fabing up brackets. Of course, if you want to pound your chest and say "I did it, from scratch" Please, knock yourself out and be proud you took a harder route. Then post pictures for all to see. I await them.

For me, I'll follow the pack and not be ashamed.


Scared of a little ingenuity?
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And why would you think that? Because I suggested a kit for the OE poster? Is there something wrong with a kit? Or are you just pounding your chest at me while trying to send me into a corner? F%^&*( off.

I would not use a draw through turbo or supercharger like I have stated above,my point was that there are more options than you listed.
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LOL duley noted and a no brainer. That was easy to see. Also easy to see was your confusement of roots chargers being a blow through a carb while there not.
I posted the links to the various places as so not to get the OE poster confused like yourself. Lets keep mis-information down and info correct.


"The paxton supercharger or a turbo use a blow through carb since that is how it is set up"

It was this statement that triggered my comment.
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In general and popular useage, that is the way it is done. I never said it couldn't be that way, by why would you do it that way? To be different? Come one now. Stop it. Your splitting hairs like a jerk. Your trying to bust my balls on a hair splitting and seldom used method of superchargeing and carb use. WTF!?!?!

When was the last time you have seen it done as a draw through carb that is offered as a aftermarket set up? What company does this. Some small out of the way shop in the middle of no where?

Well goollly jeee good for them and you.

Maybe, the OE poster wants to do it the easy way instead of fabbing everything up and doing it in a non-main stream way. IDK, I just answered the question. You just wanna start ****.

(I'm outta here)
 
Grinder said:
Rear mounted turbos are not application specific. The make them for Vipers and Vettes,could be easily adapted to and old car. Saw a 68 camaro at a car show with rear mounted turbos,I think it was a year one car or something of the like.
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Never said they were. So, list me a app. for a 68 Dart.


For the intercoler, with a turbo they are cheap. You can get a kit for under 200 with the piping,and its a front mount so you can still see over you hood after you install it:-D
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And now your talking kit. Afraid of a little.....
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shake hands guys. no need to get heated......i think the name calling was a little inappropriate...
 
Coyote Jack said:
Geez, I didn't want to start a war. LOL

Jack
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You didn't start a war jack, he started with a few things and got hissy, so I handed it right back. It's an on going thing with him and now he just added more fuel for the fire with personal insults.

All I did was point out that he was wrong with a 6/71 being a S-charger that sucks in/draws in the fuel from under the carb, not blow through and he kept going.

I'm only trying to help or suggest. AND I did say I don't know a whole lot about the subject from the get go.

Read the B.S. again and weed through the stupidness of it all for the infomation pertaining to your wants. Best bet would be to contact a supercharger place and get more info from them. I can't comment much more on what you may need to know about this build your thinnking of.

BlowerDriveService has those nasty stick outta your hood blowers (6/71) and the Supercharger store.com has the hairdryer style superchargers.
For turbos, I'd contact SDCE, (There here on this board) for there advice on doing a turbo set up.

But be careful, GRINDER may call you something less than polite if you whimp out and get a kit.
 
So anyway- I was interested in hearing about the supercharged 360. Any progress there?

The Vortech looks like it would not require the hood scoop, correct? Since it is mounted on the front of the engine... That would solve the rain issue.
 
That would be correct Jim. Since it is mounted on brackets to the front of the engine, the air intake (Filter) can be placed ethier on the unit itself or moved with tubing.
 
6pk2go, his posts were over thr top direct assulats. He don't like my mug in the avatar. Most of this could go into the trash.
 
Did I misread that the OP was looking for some eye candy wow factor appeal also?
Traditional roots style superchargers can be alot of fun on a street car and are very visually impressive. Littlefield, BDS, and Dyer are very good manufacturers of blowers and kits. (Kits? Sorry, why reinvent the wheel when someones done the groundwork?)

Someone had mentioned that heads weren't a big deal. Wrong. With a blower motor, heads can make a big difference. If you can't flow the air you force into the motor, it will build up alot of heat and then you have detonation problems. That will take the fun out of your day. Keep your compression low and try to avoid "blower" cams on a street motor running on pump gas.

If you want to build it, do it. Just do your homework first and you will be happy with a killer motor.
 
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