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SC300 Weight Reduction Worksheet

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Old Jun 23, 2006 | 10:42 AM
  #151  
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Originally Posted by boosted SC
no one EVER take out your EGR valve. cars equipped with this valve are equipped with it for a reason. taking this valve out will more than likely cause detonation and overheating and destroy your engine. is that really worth 2 pounds? it doesnt take away any horsepower either it only helps your engine run better and of course cleaner.

the egr valve only opens at light acceleration, cruising, and deceleration. at WOT the valve is totally closed so you dont ever lose any power having it. taking it off is a very stupid idea. as a matter of fact taking off any emission components is a very stupid idea. this isnt the 80s anymore where everything is belt driven. no emission components take any power anymore they only help your engine run cleaner and last much longer.

(sorry if this was already covered. i read first post and immediately had to say something.....)
I disagree with your statement....There are several no actually many people that have successfully deleted the EGR system...Remember the EGR recycles exhaust gases through the intake...The worst thing that can happen by deleting the EGR is you may run just a tiny bit rich in fuel mixture...You will have a cleaner internal engine with the EGR deletion...

Recycling the exhaust gases helps lower the intake temp so when removed you will not see any hp gains or loses...However, the recycled exhaust gases help reduce NOX. so if you care about the planet keep the EGR intact...Good for the masses not that good for the Lextremists...
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Old Jun 23, 2006 | 11:10 AM
  #152  
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Originally Posted by jibbby
Whom ever mentioned moving the battery to the trunk is a good idea for weight transfer but not for weight reduction....10 feet or so of additional thick batery cables have got to weigh a couple of pounds or so......
That's why I went with an 11 pound battery in the stock location. Saved about 25 lbs from the front of the car.
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Old Jun 23, 2006 | 12:08 PM
  #153  
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im a smog tech man i know what im talking about. cycling exhaust gas through doesn't make the car run rich or lean it just dillutes the mixture a bit and cools down your cylinders so you dont overheat and detonate. taking it out wouldn't make it run rich at all it would still run the same just it would never be cooled down good enough. therefore taking it out would decrease hp by at least a little bit and would be bad for your engine. and how can you say taking out any emission control component would make any engine run cleaner when the whole point of putting them on is because they don't run clean enough without it??
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Old Jun 23, 2006 | 07:32 PM
  #154  
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Originally Posted by jibbby
I disagree with your statement....There are several no actually many people that have successfully deleted the EGR system...Remember the EGR recycles exhaust gases through the intake...The worst thing that can happen by deleting the EGR is you may run just a tiny bit rich in fuel mixture...You will have a cleaner internal engine with the EGR deletion...

Recycling the exhaust gases helps lower the intake temp so when removed you will not see any hp gains or loses...However, the recycled exhaust gases help reduce NOX. so if you care about the planet keep the EGR intact...Good for the masses not that good for the Lextremists...
Blocking or deleting the EGR valve shifts the car to run a bit more lean, thats where the small power gain comes from and where the car runs a bit more hot. But I dont see where such a small change would cause detonation, that is a bit farfetched.
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Old Jun 23, 2006 | 09:08 PM
  #155  
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man you guys gotta be kidding me. power comes from running rich not lean. lean causes overheating and detonation and will be the end of your engine. im not gonna keep repeating myself. take my advice or dont i dont care anymore. i try to help you guys out but you dont wanna listen so go ahead and ruin your engine so you can lose a couple hp. have fun and have a nice day.
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Old Jul 17, 2006 | 10:05 PM
  #156  
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So who has the lightest SC300?
Anyone out there be break the 3000 mark yet?

In preparation for an all out race SC300.....
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Old Jul 17, 2006 | 10:58 PM
  #157  
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Originally Posted by Jeffro
So who has the lightest SC300?
Anyone out there be break the 3000 mark yet?

In preparation for an all out race SC300.....
The guy who did the dune buggy SC
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Old Jul 18, 2006 | 12:14 AM
  #158  
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Originally Posted by boosted SC
im a smog tech man i know what im talking about. cycling exhaust gas through doesn't make the car run rich or lean it just dillutes the mixture a bit and cools down your cylinders so you dont overheat and detonate. taking it out wouldn't make it run rich at all it would still run the same just it would never be cooled down good enough. therefore taking it out would decrease hp by at least a little bit and would be bad for your engine. and how can you say taking out any emission control component would make any engine run cleaner when the whole point of putting them on is because they don't run clean enough without it??
WOW, I don't know how to respond to this other then you are wrong, and I don;t know what they are teaching you at your smog tech school....but it is a miss...no offense....

To begin with the EGR system recycles exhaust gases back thru the intake and then thru the engine to burn again reducing NOX emissions...That is the purpose of the EGR system......When the EGR functions over time the recycled gases cause internal engine grime build up.. It is alot and nasty.....I have seen engines opened with and without EGR systems, the engines I saw were the V8 1uz-fe's and the engine without the EGR system was clean and spotless, infact looked like new on the insides, and the other engine that had the EGR functioning for years was covered with grime and buildup on the heads and pistons...Pictures of this are illustrated on the Lextreme.com forum under the thread "deleting the EGR" Go see for yourself if you don't believe me...For a smog tech guy you should know this, recycling dirty exhaust back thru the engine does not make the engine cleaner (that is common sense)....

Now studies have also shown that when the EGR is deleted on the !uz-fe engines the exhaust gases which help fill volume for detonation in the engine is eliminated when the EGR is deleted...Thus more fuel is consumed to fill that void of exhaust gases that are missing... It is a very small difference as not much gases are recycled but cause a very slight fuel inrichment.......

Also a lean fuel mix is more combustable then a rich fuel mix....Oxygen helps burn fuel....Engines typically blow when running lean, again I know this first hand. I must run my car slightly rich to accomadate my nos system...Too lean I blow.... .

You are correct about the EGR system cooling the intake and could possibly lose a few ponies by deleting the EGR...Your are 100% correct about that statement....

Class is over, and school is out...These are the facts and they are undisputed........

Last edited by jibbby; Jul 18, 2006 at 12:18 AM.
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Old Apr 9, 2007 | 07:09 PM
  #159  
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Originally Posted by boosted SC
man you guys gotta be kidding me. power comes from running rich not lean.

WoW.......
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Old Apr 9, 2007 | 08:59 PM
  #160  
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Originally Posted by boosted SC
man you guys gotta be kidding me. power comes from running rich not lean. lean causes overheating and detonation and will be the end of your engine. im not gonna keep repeating myself. take my advice or dont i dont care anymore. i try to help you guys out but you dont wanna listen so go ahead and ruin your engine so you can lose a couple hp. have fun and have a nice day.


damn man... maybe you should stop messin with your car...

power comes from running lean... but the more you run lean the more chances to detonate and blow your motor. the more rich you run the less hp there is... have you ever been in a car where there is a sudden rich spot in a map... it just bogs and slows down...

granted the more rich you run the more timing you might be able to advance which can add some power also. but too much timing can detonate and end a motors life also...

more fuel and running rich makes the combustion process a lil slower, more fuel to burn if it can burn all of it, which in turn will yeild less power... burns cooler... less energy less power

running lean, yeilds more power. cuz it burns faster. true your egt's will go up and it will be hotter. did you know that more heat generates more energy... probably not since you think running rich gets more power...

Last edited by booja; Apr 9, 2007 at 09:08 PM.
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Old Apr 10, 2007 | 06:21 PM
  #161  
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Back on subject, remove power antenna and replace with interior winsheild one for $53.00 total, save 2lbs. and relpace a worn out ant.
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Old Dec 31, 2010 | 11:21 AM
  #162  
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reviving from the deadddddddddddddddddddddd...
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Old Apr 19, 2011 | 11:27 AM
  #163  
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bringing this back from the dead cuz I know people have found more ways to save weight in this car. how much do door cards weigh?
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Old Apr 19, 2011 | 01:07 PM
  #164  
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I use to own a lightweight FWD DC2 and the lengths users went to were pretty extreme. I'm not bothering with that for the soarer for a few reasons, most of which have already been covered earlier in this thread. But I'd like to see what people have achieved.

For me it's just not the car I would choose to start with if I were going down that route. I also choose to run a heavy stereo which kinda negates the point of any other weight reduction efforts.

Anyhow I digress.

My main point would be that aerodynamics should be considered as well as weight reduction and power increases.

Linky to get you started

http://www.mech.kth.se/courses/5C121...raghi_2010.pdf
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Old Apr 19, 2011 | 01:23 PM
  #165  
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Originally Posted by SupraCoup3
Stock Weight 3492 (1992 5 speed base weight)
Racing Seats -120
Spare & jack -80
CF Hood -38.5
Lightweight battery -20
Aftermarket wheels -20
coilover suspension -10
EGR System -2 (not really worth it, but hey, it cleans up the engine bay)
MKIV Brakes -2.5
BFI Intake -1

Overall weight savings: 294 Lbs

Total: 3198 Lbs


Cost:

Racing Seats: ~$900
Spare Tire & Jack: Free
CF Hood: $500 + S/H
Lightweight Batt: ??
Aftermarket Wheels: $2,000-$3,000 (gram lights are $1,700 tho)
Coilovers: $1,200
MKIV Brakes: $500
EGR System: $50 (for block-off plates)
BFI Intake: Free


brembo's or stoptech brakes would help with some unsprung weight as well.


JT
so roughly $5-$6 grand to lose a couple hundred pounds?

Meh ----ill politely pass.
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