Supercharger or Turbo?

[BlackBourbon]

But it is also slightly limited - you cannot run an intercooler which means you have to tune very carefully to avoid detonation.

wow man, i'd do a little more research before putting info out like that. S/C setups can run intercoolers haha. If you are using a roots or twin screw style blower i can see why you'd think you couldn't but there are definitely intercoolers for those setups as well. there are stacked water/air units that mount right under them.

now on a centrifigal type supercharger you can use an intercooler exactly like you do on turbo setups. centrifugal is basically the same thing as a turbo except it's ran off a belt instead of exhaust

 

[Kjunky5]

Isn't this backwards?

BGKYK5's got it right.

I vote turbo. The blower was cool in Mad Max but that's it.

Wouldn't this look good on my 5.3 swap?

 

[BGKYK5]

Wouldn't this look good on my 5.3 swap?

Do it!

 

[noJeepshere]

Yes yes, VERY nice!

Check out his other vids to see it running.

 

[xCaliK5x]

All a supercharger really is is a belt driven turbo. Torque is more important in our rigs. If I could do it, I would pick a smaller turbo that will be most efficient in the lower range. Forced induction also like a cam with no overlap. You could very easily build a stump puller. As stated earlier, fueling is the key, if its not right, I have seen motors melt down on the dyno. I would ditch any attempts at running a carb or modified OEM injection (since there is no support for it I know of) and get a standalone like a TEC3 so you can baseline it and tune it with a laptop. Turbos can make a ton of reliable HP out of small displacement motors. Its a lot easier then it use to be. This is what we are getting on motors like my measly 2.0 in my VW on pump gas and stock engine management. I can only imagine what a good setup on a small block would be. Slightly fast.

 

[runamok151]

what cam are you running and what compression ratio? w/ propane you can run a much higher compression ratio because propane's octane rating is about 105. if you're running a stock BBC, bumping up the cam and/or roller rockers might give you the extra power you want cheaper than a super charger. my friend runs about 11.5:1 CR on propane in his furd rock crawler. i think the motor is a 400m.

 

[us74k5]

That is the conclusion that I have already came to:-) I am running 10.5 : 1 right now. Will probably go to the 781 heads, with a new cam.

 

[Jessie James]

wow man, i'd do a little more research before putting info out like that. S/C setups can run intercoolers haha. If you are using a roots or twin screw style blower i can see why you'd think you couldn't but there are definitely intercoolers for those setups as well. there are stacked water/air units that mount right under them.

now on a centrifigal type supercharger you can use an intercooler exactly like you do on turbo setups. centrifugal is basically the same thing as a turbo except it's ran off a belt instead of exhaust

Doh, you're totally right. For some reason I was thinking just of roots/screw and totally forgot about belt driven.

And I didn't know they had inline intercoolers, that's cool.

Just another reason to never take what anyone says as gospel!

 

[DEMON44]

That is the conclusion that I have already came to:-) I am running 10.5 : 1 right now. Will probably go to the 781 heads, with a new cam.

you won't get away with running that much compression with any forced induction. and propane is up aroud 110 octane. but you still can't run 10.5:1. you want a nice stock type 8.5-9:1 then force feed it. cast pistons not so good either. hyperutectic-ok. forged-best for forced.

I've seen with my own eyes, a water to air intercooler that goes in between a roots blower and the manifold. I cannot for the life of me recall the brand though. It was a stroked 351w with an 8-71 on it.

 

[sandypants]

hey look for sts turbo. http://www.ststurbo.com/ you mount it in the rear where a muffler would go. the air cools back down on the way back to the engine so a intercooler is not a must. plus if you realy want just use a water meth in jection. works greak, makes great power plus the meth you spray is like adding a octane booster not like you need it that much with propane. just check it out. they work great had a couple buds with great results!

 

[BGKYK5]

I've seen with my own eyes, a water to air intercooler that goes in between a roots blower and the manifold. I cannot for the life of me recall the brand though. It was a stroked 351w with an 8-71 on it.

Ford GT and the new Corvette ZR1 have that setup stock.

 

[Garageman1212]

I think lightnings had them too? For tuning you could look an mega squirt endless stuff you can do with it and super cheap. diyautotune.com If your on a budget I would find around a 90mm turbo off a semi or genset. I have a couple garrett's I got for free. Would work pretty good on that size engine. Check out theturboforums.com there is everything you could ever want to know about turbos there.