Super charger vs Turbo charger

[Oldschoolpony]

My question is this
What are the pro's and cons of super vs turb chargers, On a 347 88 gt. Strip car..

Turbo? single turbo looks nice, but what about the uneven exhaust tubes????

Super chargers are nice too, But what about drag on motor from pulley?

Power curve?
Figure between 12-20 psi boost and air to air intercooler.
PS, dont worry about the engine, its a LUGO motor and its built to the hilt.

[sn95gt19]

for simplicity i would say go supercharger, but if your looking to get the most out of your motor and spend the time to install the pipes, i would say turbo.

in the same condition, a turbo will always make more power than a supercharger. the only thing is that you have to find the turbo that suits your combo best, or it wont go anywhere.

i have a fuel injected 347 w/race ported tw's, i am picking up a t76 precison ball bearing turbo for, i talked to precision and they said with my combo i should have full boost by about 3000-3200 rpms.

cant wait to get it all put on

[Oldschoolpony]

Well, currently, i have 55 cc dart jrs, stage 3, but want to go to a much larger chambered head to lower compression.

Either way I'd be spending alot of time on the dyno. I'm running victor jr with 750 barry grant. cam, 244 in x 255 ex @ 50. dur. with 600 lift.

On my carbed set up, with no traction (2.2 60 ft.) I ran 12.2 at just over 118 mph. But couldnt tune suspension, because I couldnt get a world class t-5 to make more than 6 passes before it died. ( 3 times )

[sn95gt19]

if you have the stock short block i would go with a 331-347 and just get the low compression pistons.

[bigdave]

If it's a strip only car, and you don't mind the work involved in all the extra piping, I'd say go with the turbo. The turbo is more efficient with an intercooler and doesn't require the engine to turn it. With a high stall convertor, the turbo will spool up nicely when you power brake/trans brake it. If it were a street car, I'd say go with the supercharger because it is simpler, easier to work on the engine, and it makes more torque than a turbo.

[BilLster]

well i initially just put turbo because thats what i have because i can very boost for street driving it gives me a softer launch (not as much suspention problems) but i have a twin with equal length headers feeding the turbo's.

I'm seriously thinking of going N2O for my strip car for ease of work and cost.

My recomendation thought would be go to the track and see what others in your area are running so you can get some suggestions and help if a problem arrieses. I pretty much was on my own but now have done up 6 or 7 twin turbo set ups for friends and have just finished my new motor which dyno'd 150 hp more than my old motor with just a few mods.

also if staying carbed ill'd saw blower also whats the lsa of the cam a turbo motor likes at least 116

I would switch to injected if you were going turbo. Ps you can conver that manifold and add a 90 degree elbo so there wouldnt be any power lose.

[Oldschoolpony]

Ok, going back to fuel injection is not an option.

And I do have a 347, scat crank, crower forged rods and nowak 400 piston(capable of handleing 300 hp nos according to the now defunct nowak company in cali.) Coast main girdle and all ARP studs. Cloys true roller chain and solid roller cam. comp cam HR292. Switched from a WC T-5 And 456 gears to a TA C-4 with 8" stall rated at 4200 rpm w/o NOS and 4600 w/ NOS stall speeds, according to PA in North fl. ( sent them all the info from blue print on engine )and 390 gears. Running on 11.5 x27 hoosiers

How does using unequal pipes work out for a single turbo?

The shop that built the car, Lugos, runs both a twin turb and single and does alot of super chargers. His wife won true street last time in Gainsville on a single turbo.
I have 175 shot now, havent even run it yet, but I just dont want to depend on the bottle.

[MidNiteBlu 5.0]

Turbos make better power but are more expensive and harder to install. I have learned alot about turbos recently and i really think they are better than superchargers.

However turbos are sopposedly a major PITA to tune on a carb

[sn95gt19]

you sound like you have the resources to get everything tuned properly, so i would definitely go with a turbo. if your looking to get the most out of it, and have room to work with i would go with a t63e (precision) or any t76. i have my mind set on a turbo, i just have to find out what kind of cam to run, and what turbo's like. good luck and GET A TURBO

ps. go to www.turbomustangs.com 6 months ago i knew nothing about turbos, since then i have read about every single post on there.

[91GTturbo]

Originally posted by bigdave
go with the supercharger because it is simpler, easier to work on the engine, and it makes more torque than a turbo.

You've got to be kidding right, a supercharger makes more torque than a turbo . Go look at some dyno graphs and get back to us on that one .

[sn95gt19]

a turbo can be somewhat compared to a kenne bell, in the way that the boost arrives. full boost at lower rpms. turbos and kenne bells are low rpm TORQUE MONSTERS

[91GTturbo]

Originally posted by sn95gt19
a turbo can be somewhat compared to a kenne bell, in the way that the boost arrives. full boost at lower rpms. turbos and kenne bells are low rpm TORQUE MONSTERS

I agree with you on the comparison between a turbo and a kenne bell, but when most people take superchargers, their talking centrifugal, and there is no comparison between the torque curves on a turbo car and a centrifugal car. And between the turbo and a kenne bell, the turbo produces even better on the big end, when a bell has lost some of it's steam.

[raptor]

Nice Ride Dude!!!

[underpsi]

Originally posted by 91GTturbo
You've got to be kidding right, a supercharger makes more torque than a turbo . Go look at some dyno graphs and get back to us on that one .

yup

[bigdave]

With turbos you have the turbo lag. With superchargers, it's making more power from take off. I'm talking about roots type superchargers, not centrifical(sp?).

[underpsi]

u didnt look did u? there is no way a charger is gonna make more torque than a turbo. instant boost? whatever! ya if u call 5psi at 2500 instant. with a turbo u can have whatever psi you want. if u call 20psi at 2800 lag u need to read a whole lot more.what kind of boost are you going to have at 3000 with a roots type charger if your max is 20 psi? not ****. there is no better power adder than a turbo in terms of reliadility and power potential. if superchargers are so good whens the last time a supercharged car won any endurance race. non have ever!

[91GTturbo]

Originally posted by bigdave
With turbos you have the turbo lag. With superchargers, it's making more power from take off. I'm talking about roots type superchargers, not centrifical(sp?).

Dave,

Lag is the biggest misconception when dealing with turbos. With the proper sized turbo for your application, a turbo will not have any lag. Slapping a 100 mm turbo on a stock 302, yea, there's going to be lag, but not if you do a little research and talk with the turbo manufactures before you order a turbo. And a roots style will still not produce more torque than a turbo on equal setups.

[bigdave]

I stand corrected! The only experience I have with turbos is on 4 cylinders, and they had bad lag.

[jonnyk]

A turbo setup will be superior to a supercharger in just about all respects. The only reason I won't be turbo'ing my car, and will in fact be using a supercharger, is cost. $4000+ for a completed street kit is just ridiculous. Either one when set up correctly on a strong running motor will be enough power to split the stock block anyways.