Lexus ISF / IS-F / LFA / LF-A  Forum banner

Which Supercharger do you Prefer.

1 - 20 of 48 Posts

·
Premium Member
Joined
·
243 Posts
Discussion Starter · #1 · (Edited)
Since it is VERY clear that a supercharger is needed for this car I would like to know which one most would like and who would be interested in donating their car to the cause!
 

·
Registered
Joined
·
16 Posts
Finally!

Well I gotta say.......Finally I'm hearing talk about supercharging. All I read about is Turbo-charging these things. The lag, the heat, and bearing issues...supercharging is the way to go. I have no car to offer..but having the first Supercharged Landcruiser in Texas with 60,000 miles on the unit...I would be the first in line if I did. Good luck on your venture and may you sell many!
airlaird
 

·
Registered
Joined
·
165 Posts
Only problem with these cars are the price to boost it,, thats one factor and the second factor is voiding warranty... I would supercharge my F if it costed around 6-8K installed. but Im pretty sure it cant get touched for less than 5 digits
 

·
Premium Member
Joined
·
439 Posts
Andy,
I sorta understand supercharger basics, including the pros and cons of each type. I was wondering which type of supercharger you think would work best on the ISF. I see that so far, I am the only one who has voted for a centrifugal style supercharger. I thought it is easier to install and maintain over a roots or screw type. I was also under the impression that a centrifugal supercharger has better gains on the top end, which I thought would be well suited for our engine. Of course, a centrifugal supercharger wouldn't have as much low end grunt as a roots or screw type, but I'm not sure how much more low end we really need...we already have enough problems hooking up as is.

Anyway, just wanted to know your thoughts on each. Thanks in advance.
 

·
Premium Member
Joined
·
243 Posts
Discussion Starter · #7 ·
Andy,
I sorta understand supercharger basics, including the pros and cons of each type. I was wondering which type of supercharger you think would work best on the ISF. I see that so far, I am the only one who has voted for a centrifugal style supercharger. I thought it is easier to install and maintain over a roots or screw type. I was also under the impression that a centrifugal supercharger has better gains on the top end, which I thought would be well suited for our engine. Of course, a centrifugal supercharger wouldn't have as much low end grunt as a roots or screw type, but I'm not sure how much more low end we really need...we already have enough problems hooking up as is.

Anyway, just wanted to know your thoughts on each. Thanks in advance.
I think both have their benefits. Once I get the Intake manifold off this car I will have a better idea. I need to know if we can fit a after cooler below the roots style blower. If we can I think that is a better option. If we can't we will have to either spray methanol to cool the intake charge or go with a centrifugal with a front mount intercooler.
 

·
Registered
Joined
·
194 Posts
Andy you need to contact me with all your brainstorming. (Bc i have a supercharger sitting in my garage) have already made contact with a certain (#1) manifold maker for NHRA cars (custom stuff and its only a three week turn around).
 

·
Premium Member
Joined
·
243 Posts
Discussion Starter · #9 ·
Andy you need to contact me with all your brainstorming. (Bc i have a supercharger sitting in my garage) have already made contact with a certain (#1) manifold maker for NHRA cars (custom stuff and its only a three week turn around).
I sent you a pm. You are welcome to call me at the shop anytime before 930pm CST
 

·
Registered
Joined
·
434 Posts
positive displacement all the way. it offers better throttle response, more consistent boost, and better low end torque....which is what the ISF needs more of to get off the line. a roots/twin screw will be able to produce boost right off of idle. centrifugal superchargers act too much like a turbo, there is lag and they dont produce the same consistent pressure that a positive displacement can because they cant deliver a consistent volume of air at all engine speeds.

if you want neck snapping performance, then a roots/twin screw is the way to go. plus the whine sounds very appetizing.

and besides.....a centrifugal needs to be mounted somewhere in the engine bay....and that takes space we likely do not have. a twin screw sits atop the intake manifold.
 

·
Registered
Joined
·
386 Posts
What boost do you expect with an 11.8:1 motor or is your ultimate goal to go to an 8:1 piston and start fresh?
 

·
Registered
Joined
·
294 Posts
mmmmm supercharger. That's what I've wanted from day one for this car. James (owner of JE) and I were talking about possibly making one eventually but if someone else can do it that would be awesome since we are still working on the headers (which should be complete soon, next production set comes in beginning of next week. I'm keeping my fingers crossed this one will be the one ready for final production). Andy keep me informed on whats going on with this please. Thanks.
 

·
Registered
Joined
·
377 Posts
positive displacement all the way. it offers better throttle response, more consistent boost, and better low end torque....which is what the ISF needs more of to get off the line. a roots/twin screw will be able to produce boost right off of idle. centrifugal superchargers act too much like a turbo, there is lag and they dont produce the same consistent pressure that a positive displacement can because they cant deliver a consistent volume of air at all engine speeds.

if you want neck snapping performance, then a roots/twin screw is the way to go. plus the whine sounds very appetizing.

and besides.....a centrifugal needs to be mounted somewhere in the engine bay....and that takes space we likely do not have. a twin screw sits atop the intake manifold.
Well put!!!
 

·
Registered
Joined
·
32 Posts
Owning two supercharged Toyota vehicles I would defiantly recommend going with a Roots/Twin screw design. Have a 1996 4runner with TRD blower and a 1997 LX450 With a TRD blower and they were both transformed into BEAST when the blowers were installed! The low-end torque they produce is INSANE! :D Though I have to say, I am already having trouble putting all the power down as it is in the "F". I think the only cure for the traction issues is larger width tires. Though you got to love the SCREECH when ya shift to second!
 

·
Registered
Joined
·
33 Posts
I am going to say screw type blower with caution. Personally, with the exception of the Ford Cobra/GT500 line of supercharged cars, I detest most aftermarket screw type blower systems. Aftermarket companies tend to use tiny blowers and restrictive aftercooling systems, as they design the kit to complement a totally factory vehicle, and fail to realize that horsepower is more addictive than heroin. When owners get bitten by the bug and veer further into the aftermarket searching for more power, the tiny blower/cooler is quickly pushed beyond its capabilities. Centrifugal companies like Vortech and Procharger have realized this and typically offer modular/upgradeable systems. That is my only word of caution, but considering the source, there is the definite possibility that your system will be on the first 1000hp IS-F.
 

·
Registered
Joined
·
194 Posts
Well i shipped the supercharger off to Elite yesterday, they got it today. Once they have the manifold built i will be shipping my car to them (hoping that they have the headers done by then also). It should be a real nice project once it all comes together.
 
1 - 20 of 48 Posts
Top