SuperCharging VS. Turbo
Thread Starter
4th Gear
Joined: Feb 2002
Posts: 4
Likes: 0
Re: SuperCharging VS. Turbo (tntcorvette)
If I dump the TPI like you said what does that mean? Is it just up grading to somthing like the new vettes have after 91 or what sorry kinda new to all of this have some knowledge but sill learning thanks for understanding mike
Le Mans Master
Joined: Feb 2002
Posts: 5,970
Likes: 20
From: San Marcos Texas
Re: SuperCharging VS. Turbo (91VETTE2NV)
turbos are definatly more expensive than the superchargers and a lot more complicated to install(all custom work). I would start with a set of headers, good exaust, TPIS mini ram intake(this is key to letting the 350 breathe), TTPIS zz9 cam, or equivelent,new valve springs, roller rockers, adjustible fuel pressure regulator, new wires, plugs, cap, rotor, coil, and k&n air filter, and a new chip to go with it from TPIS. This will be less than the supercharger and make your car run mid 12's in the quater mile. it should give you from 350 to 380hp. and fell like 450!! :reddevil
Safety Car
Joined: Mar 2001
Posts: 4,847
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From: Tampa FL
Re: SuperCharging VS. Turbo (tntcorvette)
There are also many different types of supercharges to choose from (Roots, screw, blower etc). Some like the Paxton style are a little less in cost others can be quite expensive. For a mild application supercharger may be easier & cheaper. For all out craziness, I have come to really respect the turbos because they allow better traction by allow one to adjust the boost up higher in the rpm range. Just decide what your goals are & then just really research the heck out of it. The web has an endless source of info on the subject...
Race Director
Joined: Dec 1999
Posts: 10,230
Likes: 885
From: Alexandria, Virginia, USA VA
Re: SuperCharging VS. Turbo (tntcorvette)
centrifical superchargers and roots superchargers, or better still screw superchargers behave differently. the roots and screw superchargers can provide more low end boost/torque while the cent. sups act kinda like a "belt driven" turbo with the boost coming on more gradually. the turbos themselves are not that expensive, (around $750 each) it's the plumbing and associated computer control/injectors, intercoolers, etc.. and difficulty in packaging that drives up the cost. the turbos can make some plain stupid power if setup right and by bringing the boost up on the line by power braking (or a trans brake) there really isn't much of a lag problem turbo cars with a stick are a bit more tricky to launch as you can't really build boost without a load on the engine very easily. unless you are ready to spend some serious cash, stay away from the turbos, calibrating the fuel and spark curves can be a bit tricky and typically will require a Speedpro or other after market computer.
I LOVE the twin turbo engines though, they are just too cool. :D
I LOVE the twin turbo engines though, they are just too cool. :D
Instructor
Joined: May 2001
Posts: 116
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From: Bellingham WA
Re: SuperCharging VS. Turbo (Rkreigh)
I think the turbocharging route is best if you are going to spend the cash.
If you go centrifugal the cost is high if done correctly IMO. Correctly means..
DFI system, headers if s/c(good ones ) blow off valve, intercooler either way, etc.. the turbo system and the s/c with headers etc.. It is all in what you want though.. I think there is lots of cool blower systems out there but if you have the money i still think turbo is the forced induction route.
On a side note with my manual before i went auto I had no problem building boost at the line this was with my last turbo system though this one will be fine though too
Steven
If you go centrifugal the cost is high if done correctly IMO. Correctly means..
DFI system, headers if s/c(good ones ) blow off valve, intercooler either way, etc.. the turbo system and the s/c with headers etc.. It is all in what you want though.. I think there is lots of cool blower systems out there but if you have the money i still think turbo is the forced induction route.
On a side note with my manual before i went auto I had no problem building boost at the line this was with my last turbo system though this one will be fine though too
Steven
Le Mans Master
Joined: Feb 1999
Posts: 5,877
Likes: 1
From: Park Ridge IL
Re: SuperCharging VS. Turbo (zturbo)
Zturbo,
Which HKS wastegates are those? And what spring are you running in them? They look like the Standard HKS, due to the two bolt outlet flange.
I also have the Standard HKS wastegates with 20 psi purple spring. The guy fabricating my turbo headers hasn't gotten to mounting the wastegates yet, and I'm wondering about their Racing wastegates. I was talking with PTE and they said I wouldn't need the GT or Race wastegates until aorund the 1300-1400 range, but If I decide to upgrade past the PT-54's, I would also need to swap out the wastegates, and the GT/Race wastegates utilize a different mounting flange, as well as the wastegate outlet flange.
[Modified by Monty, 10:05 AM 2/14/2002]
Which HKS wastegates are those? And what spring are you running in them? They look like the Standard HKS, due to the two bolt outlet flange.
I also have the Standard HKS wastegates with 20 psi purple spring. The guy fabricating my turbo headers hasn't gotten to mounting the wastegates yet, and I'm wondering about their Racing wastegates. I was talking with PTE and they said I wouldn't need the GT or Race wastegates until aorund the 1300-1400 range, but If I decide to upgrade past the PT-54's, I would also need to swap out the wastegates, and the GT/Race wastegates utilize a different mounting flange, as well as the wastegate outlet flange.
[Modified by Monty, 10:05 AM 2/14/2002]
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Instructor
Joined: May 2001
Posts: 116
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From: Bellingham WA
Re: SuperCharging VS. Turbo (Monty)
HKS Standards here that have been ported. I am running 20 psi springs as well. I like the gt series better and might think of swaping mine but dont know right now since these have been ported out larger.
Steven
Steven
Le Mans Master
Joined: Feb 1999
Posts: 5,877
Likes: 1
From: Park Ridge IL
Re: SuperCharging VS. Turbo (zturbo)
Would you mind explaining what part of the wastegate is ported?
I was looking at the HKSUSA wesite today and noticed they make a flange to convert from a Standard to a Racing wastegate. This seems like a good alternative to refabbing the headers.
I was looking at the HKSUSA wesite today and noticed they make a flange to convert from a Standard to a Racing wastegate. This seems like a good alternative to refabbing the headers.
