Supercharging
Thread Starter
Melting Slicks
Joined: Sep 2000
Posts: 2,683
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Supercharging
From the things I've read, both here and in books, it seems like anything you do to make more power tends to rob from power somewhere else; It's always a big tradeoff between low end torque and high end horsepower. What will increase power accross the bar? Does a supercharger accomplish this?
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: Supercharging (A)
Well, a supercharger robs the engine of some power in order to turn it. Yet.... the gains BACK from it are much larger. :) I like superchargers, they are go fast NOW systems. :)
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: Supercharging (A)
I really really really really really want a SC :yesnod: I have always wanted a forced induction car (more specifically a turbo, but that's too much plumbing!).
Well, it seems that the L98 is a good engine to do it with. The '87 has a low compression ratio of 9.5:1, that is a good starting point. :) It might be a good idea to strengthen the bottom end though. ;)
Race Director
Joined: Nov 2000
Posts: 17,103
Likes: 39
From: stop the fun suckers
Re: Supercharging (A)
I;ve been considering putting a stuffer on the '93... however, I;ve heard mixed reviews.. usually negative about supercharging.. (I still wanna try it though.. :) )
Instructor
Joined: Nov 2000
Posts: 174
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From: Conroe TX
Re: Supercharging (A)
I just bought and had installed the Vortech SQ trim kit for my 94 LT1 automatic. The installation was VERY difficult according to my mechanic and the instructions were less than perfect. While he only charged me $1350 for his 4 days of hard work, I think he got the raw end of the deal as it took alot of time and trial fitting parts/hoses, etc.
I've only had the car back for 4 days now but it runs like a scalded cat on the top end. I can really feel the blower come on strong above 3000 rpm and it is very tame while just crusing around town. Now I'm looking at a gear upgrade....it never ends with this madness!
I've only had the car back for 4 days now but it runs like a scalded cat on the top end. I can really feel the blower come on strong above 3000 rpm and it is very tame while just crusing around town. Now I'm looking at a gear upgrade....it never ends with this madness!
Drifting
Joined: Mar 1999
Posts: 1,931
Likes: 1
From: Norcross GA
Re: Supercharging (bellmd)
A,
To answer more of your Q,.... An SC will help the mid to top end of the engine RPM. The way the SC's and turbo's work, they are regular NA engines down low. Typically about 3K RPM the induction starts to work. From here on up, you have positive manifold pressure. The more RPM, the more boost,... i.e. More manifold pressure. The max boost depends on the pulley size/gear ratio of the SC.
I should point out, that an SC will force an L98 to continue to breath where it typically runs out of breath. i.e. You can have your bottom end and top end as well! For an LT1/4, an SC will help the good mid-> high be even better.
To answer more of your Q,.... An SC will help the mid to top end of the engine RPM. The way the SC's and turbo's work, they are regular NA engines down low. Typically about 3K RPM the induction starts to work. From here on up, you have positive manifold pressure. The more RPM, the more boost,... i.e. More manifold pressure. The max boost depends on the pulley size/gear ratio of the SC.
I should point out, that an SC will force an L98 to continue to breath where it typically runs out of breath. i.e. You can have your bottom end and top end as well! For an LT1/4, an SC will help the good mid-> high be even better.
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Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: Supercharging (A)
So if I were to supercharge the motor, would it be best to keep the stock base, plenum, & runners instead of going to a super ram then?
You'll spend as much on a supercharger as you would to rebuild to and possibly a budget 383.
Melting Slicks
Joined: Apr 2001
Posts: 2,474
Likes: 1
From: Drive it Like You Hate it Cincinnati OH
Re: Supercharging (scorp508)
I've heard the SuperRam can't handle much boost. I think the issue is the lid not being strong enough to seal well, with the added pressure. I'm thinking of SC'ing my engine at some point...
Well, now I see Miker has a SC'ed SR...
[Modified by FoolCrzy, 11:01 AM 11/5/2001]
[Modified by FoolCrzy, 11:01 AM 11/5/2001]
Well, now I see Miker has a SC'ed SR...
[Modified by FoolCrzy, 11:01 AM 11/5/2001]
[Modified by FoolCrzy, 11:01 AM 11/5/2001]
Instructor
Joined: Jul 2001
Posts: 198
Likes: 0
Re: Supercharging (scorp508)
A supercharger will help high or low end power depending on the underdrive or overdrive used to spin it, I would not want to try one on a stock 2 bolt main cast crank , cast piston engine though.
Melting Slicks
Joined: Apr 2001
Posts: 2,474
Likes: 1
From: Drive it Like You Hate it Cincinnati OH
Re: Supercharging (jeffie86/96)
Any idea how much boost I could run with my ZZ4 bottom end and approx. 10:1 CR??? I'm thinking 6# would be fine, but could I go to 8# with an intercooler???
[Modified by FoolCrzy, 11:11 AM 11/5/2001]
[Modified by FoolCrzy, 11:11 AM 11/5/2001]
Instructor
Joined: Jul 2001
Posts: 198
Likes: 0
Re: Supercharging (FoolCrzy)
Considering you are already running a very high compression ratio I wouldn't use a blower however if you dropped it down a few notches you could probably use 6 to 8 psi without too much trouble, my experience is limited to Detroit Diesels with superchargers. sorry