Turbo vs supercharger ?'s
#1
Melting Slicks
Thread Starter
Turbo vs supercharger ?'s
My build originally started out as a Turbo build. It started with the engine. 383 LT1. 9 to 1 compression. I'm kinda feeling like giving up on the turbo and just put in a supercharger kit. It seems like the easiest and fastest way. My ultimate goal would be somewhere around 600 rwhp. What are your thoughts? Anyone experienced with both? Pro's and cons? Basically, is the turbo worth the extra hassle? I do all my own work, that's why I ask.
P.S. I really just want a car that I can beat the crap out of. It will be a street car, but it will see some time at racing events as well. Drag, autox, road race, etc.
P.S. I really just want a car that I can beat the crap out of. It will be a street car, but it will see some time at racing events as well. Drag, autox, road race, etc.
#2
Melting Slicks
My build originally started out as a Turbo build. It started with the engine. 383 LT1. 9 to 1 compression. I'm kinda feeling like giving up on the turbo and just put in a supercharger kit. It seems like the easiest and fastest way. My ultimate goal would be somewhere around 600 rwhp. What are your thoughts? Anyone experienced with both? Pro's and cons? Basically, is the turbo worth the extra hassle? I do all my own work, that's why I ask.
P.S. I really just want a car that I can beat the crap out of. It will be a street car, but it will see some time at racing events as well. Drag, autox, road race, etc.
P.S. I really just want a car that I can beat the crap out of. It will be a street car, but it will see some time at racing events as well. Drag, autox, road race, etc.
Im sure you know that 600 RWHP is completely obtainable with a bolt on SC. Correct?
#3
Melting Slicks
Thread Starter
Yeah, that's what makes it so tempting. At first I thought it would be kinda fun to build my own turbo system. Now that things in my life have changed since starting the engine build, I don't seem to have the ambition and time and I want to drive my car. I'm going to put the engine in N/A and run it, but I still want FI.
#7
Melting Slicks
#8
Melting Slicks
Thread Starter
Can anyone tell me about driveability between the two? Turbo's can obviously come on pretty strong. Would it be controllable around a long sweeping corner? How about the blower? If boost is a product of RPM then it must be more predictable.
#9
Melting Slicks
supercharger will be easier to install versus fabbing up a turbo kit. 600rwhp is going to require an upgraded bracket and the new Ti trim vortech blower or ysi to get there. Our engines aren't very efficient from what I've seen. A maxed out t trim will barely hit 600 rwhp due to the belt slip caused by using a 7.35" crank pulley. The small crank requires tiny blower pullies to spin the thing hard enough to make boost.
Anything above 600 rwhp and turbo is easier. I have a ysi on mine but I'm not convinced it'll make a ton of power without a bunch of rpm.
Blower boost is linear so it's not too hard to tune for unless you're getting slip. You're probably going to want a 2 bar tune either way as you're going to be needing about 14-16 psi with a blower and maybe about 10-12 with a turbo.
Anything above 600 rwhp and turbo is easier. I have a ysi on mine but I'm not convinced it'll make a ton of power without a bunch of rpm.
Blower boost is linear so it's not too hard to tune for unless you're getting slip. You're probably going to want a 2 bar tune either way as you're going to be needing about 14-16 psi with a blower and maybe about 10-12 with a turbo.
#10
Melting Slicks
Thread Starter
I'm using a Megasquirt for control. So many possiblilies with it. For a DIY guy they are very cool. As far as blower trims, I know nothing. TI or YSI means nothing to me. LOL I'm concerned that if I get to my power goal with a turbo, the car will act like a 2 stroke and come on so hard that if it's not pointed straight, well, bad things will happen. Unfortunately I don't have any friends with fast cars anymore. I don't even know anyone with a modified vette except my buddy who bought my old 92. That's why I'm asking for your opinions.
#11
Cruising
Member Since: Jul 2014
Location: Old Bridge, N.J.
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Originally Posted by qwiketz
Anything above 600 rwhp and turbo is easier. I have a ysi on mine but I'm not convinced it'll make a ton of power without a bunch of rpm...
#12
Melting Slicks
There are other tricks to controlling boost with superchargers as well. They are not the most efficient methods, but work very well.
One thing is the put a restriction plate on the intake to the supercharger. This limits the CFM and therefor the boost on the output. Some of the C5 guys use this method and they like it.
The other thing I've seen people do is put a wastegate on the intake piping. Once the pressure gets too high then it bleeds off some to keep it in the safe range.
Both methods require you to pulley the supercharger for more than what you need, but they also allow full boost to come on at a much lower RPM range.
One thing is the put a restriction plate on the intake to the supercharger. This limits the CFM and therefor the boost on the output. Some of the C5 guys use this method and they like it.
The other thing I've seen people do is put a wastegate on the intake piping. Once the pressure gets too high then it bleeds off some to keep it in the safe range.
Both methods require you to pulley the supercharger for more than what you need, but they also allow full boost to come on at a much lower RPM range.
#13
Drifting
There are other tricks to controlling boost with superchargers as well. They are not the most efficient methods, but work very well.
One thing is the put a restriction plate on the intake to the supercharger. This limits the CFM and therefor the boost on the output. Some of the C5 guys use this method and they like it.
The other thing I've seen people do is put a wastegate on the intake piping. Once the pressure gets too high then it bleeds off some to keep it in the safe range.
Both methods require you to pulley the supercharger for more than what you need, but they also allow full boost to come on at a much lower RPM range.
One thing is the put a restriction plate on the intake to the supercharger. This limits the CFM and therefor the boost on the output. Some of the C5 guys use this method and they like it.
The other thing I've seen people do is put a wastegate on the intake piping. Once the pressure gets too high then it bleeds off some to keep it in the safe range.
Both methods require you to pulley the supercharger for more than what you need, but they also allow full boost to come on at a much lower RPM range.
#14
Cruising
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Originally Posted by mn_vette
The other thing I've seen people do is put a wastegate on the intake piping. Once the pressure gets too high then it bleeds off some to keep it in the safe range...
#15
Melting Slicks
That is the route I was going to go with mine, currently running a '95 Corvette with D1SC, and was going to tig weld in a 44mm wastegate flange on the intake tubing, pulley it up and set boost for no more than 20-psi. Decided to wait for an F1 head unit first. Still want to route the charge dump from the wastegate to the exhaust to keep things quiet at idle, and the bypassed charge from the wastegate should be able to overcome any slight exhaust resistance...
There's no reason to cool off the air if it is going to be dumped and you don't want the MAF reading to be messed up. Not a good idea for people that have the MAF on the inlet to the supercharger.
#17
Drifting
That is the route I was going to go with mine, currently running a '95 Corvette with D1SC, and was going to tig weld in a 44mm wastegate flange on the intake tubing, pulley it up and set boost for no more than 20-psi. Decided to wait for an F1 head unit first. Still want to route the charge dump from the wastegate to the exhaust to keep things quiet at idle, and the bypassed charge from the wastegate should be able to overcome any slight exhaust resistance...
#19
Melting Slicks
That works for a BOV when you are not building any boost, but if you are doing it to bleed off boost you are heating the air from the compression and then dumping it back into the inlet of the supercharger to be heated again.