Why are supercharged LS style motors not popular? (in offroad) - Page 2 - Pirate4x4.Com : 4x4 and Off-Road Forum
 
Pirate4x4.Com : 4x4 and Off-Road Forum  

Go Back   Pirate4x4.Com : 4x4 and Off-Road Forum > General Tech > General 4x4 Discussion
Notices

Reply
 
Share Thread Tools Display Modes
Old 06-22-2011, 06:13 PM   #26 (permalink)
Registered User
 
Join Date: Dec 2007
Member # 104435
Location: aurora co
Posts: 777
Blog Entries: 1
Quote:
Originally Posted by 9toebandito View Post
I've ran superchargers in a few race cars of different kinds and they are awesome.....IF you are careful. The forged internals are only a margin of safety. A powdered metal piston does not hold up to much detonation, so most install the forged piston/crank. On the other hand, stock LS internals are known to be pretty durable. It's not impossible to do, but it does present more challenges and prep costs.
found that out the hardway
Joey
__________________
Hcimotorsports #127
Yukon Gear And Axle,,HazardousConcepts Industries, Magnus Superchargers ,Torq axle,King Shocks, Driveline Specialist, Walker Evans Racing, PSC,DynaTrac, Reid Racing, BFgoodrich, Redline graphics, Advance Adaptors , Ruffstuff, Artec
hci127 is offline   Reply With Quote
Old 06-22-2011, 07:22 PM   #27 (permalink)
Rock God
 
dan58's Avatar
 
Join Date: May 2003
Member # 19330
Location: Easton, PA
Posts: 1,977
Send a message via AIM to dan58
Quote:
Originally Posted by hci127 View Post
thats at the flywheel im sure not at the wheels
Indeed.
__________________
Thanks to Novetta Solutions, Ruff Stuff Specialties, FOA Shocks, Raceline Wheels, Rugged Radios, BFGoodrich, Reid Racing, DEI Thermal Products, DynoMax, Powertank, and RCV Axles
dan58 is online now   Reply With Quote
Sponsored Links
Old 06-23-2011, 09:37 AM   #28 (permalink)
Granite Guru
 
laproscopic's Avatar
 
Join Date: Jun 2006
Member # 73963
Location: lemoore cali
Posts: 957
all forced induction has some lag. not as predictable in race apps.

ive been tweeking the turbo on my wheeler for 4 years now and am running 10 lbs boost now. 2nd turbo. 2nd manifold. 3rd boost controler.

for the monwy you spend getting the forced induction right you can do a lot to a NA motor
laproscopic is offline   Reply With Quote
Old 06-23-2011, 10:22 AM   #29 (permalink)
Texas
 
Lee N's Avatar
 
Join Date: Sep 2002
Member # 13669
Location: San Antonio Texas
Posts: 367
Quote:
Originally Posted by laproscopic View Post
all forced induction has some lag. not as predictable in race apps.
I would disagree with the lag statement regarding an LS motor a blower. I am running a roots style blower on an LS motor in a 69 Camaro and there is zero lag. Pulls like a scalded ape right off idle and never looks back.
Problem I see with a blower in the dirt is belt slippage and clean air. When that filter gets dirty a blower has a nasty habbit of imploding them! Not a good thing if you are out in the middle of the desert.

I will agree that they are less predictable in a race situation because when the boost builds it has such a massive influx of power its hard to keep things in a straight line.
__________________
Lee N.
SA Texas

Last edited by Lee N; 06-23-2011 at 10:27 AM.
Lee N is offline   Reply With Quote
Old 06-23-2011, 10:46 AM   #30 (permalink)
Zeus of the Sluice
 
Xjcrawler736's Avatar
 
Join Date: Jan 2007
Member # 84970
Location: Lansdale, PA
Posts: 3,946
Send a message via AIM to Xjcrawler736
Quote:
Originally Posted by Lee N View Post
I would disagree with the lag statement regarding an LS motor a blower. I am running a roots style blower on an LS motor in a 69 Camaro and there is zero lag. Pulls like a scalded ape right off idle and never looks back.
Problem I see with a blower in the dirt is belt slippage and clean air. When that filter gets dirty a blower has a nasty habbit of imploding them! Not a good thing if you are out in the middle of the desert.

I will agree that they are less predictable in a race situation because when the boost builds it has such a massive influx of power its hard to keep things in a straight line.
And that is why my filter will be in the cab with a pre-filter around it. I would rather not destroy my blower on my first race.
__________________
Andy~

Ultra4 #4343 Co-driver - Molten Motorsports
Xjcrawler736 is offline   Reply With Quote
Old 06-23-2011, 02:05 PM   #31 (permalink)
Granite Guru
 
laproscopic's Avatar
 
Join Date: Jun 2006
Member # 73963
Location: lemoore cali
Posts: 957
Quote:
Originally Posted by Lee N View Post
.

I will agree that they are less predictable in a race situation because when the boost builds it has such a massive influx of power its hard to keep things in a straight line.
thats what lag is-non linear power. in desert racing and especially in short course like events (rock racing) the right foot is moving up and down all the time. forced induction can make such driving frustrating.

and nothing is worse than trying to wind up the torque converter while modulating boost. just as the torque converter is right where you need it the truck start making all this power and you launch all over the place
laproscopic is offline   Reply With Quote
Old 06-23-2011, 06:04 PM   #32 (permalink)
Registered User
 
Join Date: Dec 2007
Member # 104435
Location: aurora co
Posts: 777
Blog Entries: 1
Quote:
Originally Posted by laproscopic View Post
thats what lag is-non linear power. in desert racing and especially in short course like events (rock racing) the right foot is moving up and down all the time. forced induction can make such driving frustrating.

and nothing is worse than trying to wind up the torque converter while modulating boost. just as the torque converter is right where you need it the truck start making all this power and you launch all over the place
the only lag i've experience is when it would strip the ring gears right off
__________________
Hcimotorsports #127
Yukon Gear And Axle,,HazardousConcepts Industries, Magnus Superchargers ,Torq axle,King Shocks, Driveline Specialist, Walker Evans Racing, PSC,DynaTrac, Reid Racing, BFgoodrich, Redline graphics, Advance Adaptors , Ruffstuff, Artec

Last edited by hci127; 06-23-2011 at 06:05 PM.
hci127 is offline   Reply With Quote
Old 06-24-2011, 05:56 AM   #33 (permalink)
Texas
 
Lee N's Avatar
 
Join Date: Sep 2002
Member # 13669
Location: San Antonio Texas
Posts: 367
Quote:
Originally Posted by laproscopic View Post
thats what lag is-non linear power. in desert racing and especially in short course like events (rock racing) the right foot is moving up and down all the time. forced induction can make such driving frustrating.

and nothing is worse than trying to wind up the torque converter while modulating boost. just as the torque converter is right where you need it the truck start making all this power and you launch all over the place
I personally would rather have a big cubic inch NA motor for anything offroad (especially the rocks).

Generally speaking most people consider "lag" the time it takes for the boost to add power. More common with turbo's. A twin screw roots style blower develops boost right off idle. No time delay. It builds more power as the rpm's increase of coarse, but is in direct relation with the rpm. Its not a sudden hit unless you hit the throttle suddenly. I have never experienced any issues with being on and off the gas, loading and unloading the converter much less any frustration when driving anything with a this style blower. I can not see an issue do to "lag" for a desert car (possibly a few other issues). For the rocks I can not see a reason to put forced induction on an LS motor. Maybe bragging rights or if you just like the sound of broken parts.
__________________
Lee N.
SA Texas
Lee N is offline   Reply With Quote
Old 07-01-2011, 02:02 PM   #34 (permalink)
Registered User
 
Join Date: May 2011
Member # 190223
Posts: 226
I would see a greater advantage from trying forced induction on smaller engines to maintain adaquate torque while trying to reduce weight but it hasn't worked out.

The supercharged Buick V6's are a great example of a try. As it worked out, the N/A LS V8's worked out better in every way.

I would love to see the powerplant drop 100 pounds from LS weight levels but the only way I see that happening is with a an inline four and high speeds to make the power. The bottom end torque won't be there.

To get torque at low speed takes displacement, compression or forced induction and all those things add a lot of weight (turbo diesels are the ultimate example of everything in that list and look what they weigh!)
Nevada Ben is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 09:30 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 ©2011, Crawlability, Inc.