RCF Weight Reduction Ideas/Costs
02-14-18, 02:31 PM
#4
Driver School Candidate
Not sure of you have a aftermarket exhaust already but that's one way to cut down the weight a little the stock exhaust is heavy, I went with the Apexi exhaust and from what I read I think it'll shave off 23-25.lbs or so.
02-14-18, 06:42 PM
#6
Lexus Test Driver
So...last time I weighed my car at the track on their corner scale, it was 3962 lbs.
With all the stuff I’ve swapped out, I thought it would be a more substantial difference....
Mine you this weight is with my trunk stuff gutted out plus no floor mats.
The parts which are lighter than oem:
advan GT rims
Girodisc 2 piece rotors
penske coilovers
ppe headers
ARH stainless mid pipe
Meisterschaft Ti axelback
Full Carbon hood
RR lithium battery
T demand front control arms
Figs rear upper & lower links
Blitz strut bar (instead of oem triangle one)
Stuff I added which gained weight:
Tom’s CF skirt kit
Tom’s rear diffuser (only slight heavier than oem)
CF mirror covers
3/4 xpel wrap
Tom’s chassis stiffening braces (all 3 sets)
I will say most of the mods were undetectable as far as performance goes (straight line acceleration) except for one, the rims. The car definitely feels faster with my Advans rims.
Rotational mass!!!
I thought the rotors would have given me the same kind of gain, but I never felt a huge difference via butt dyno. But with the rims, i definitely did.
With that said, i don’t think anything we do, less gutting the whole interior, is gonna reduce weight/increase acceleration by any substantial amount.
Just accept the F as is. Embrace it. I love mine. It never fails to make me feel special when I get behind the wheel!
With all the stuff I’ve swapped out, I thought it would be a more substantial difference....
Mine you this weight is with my trunk stuff gutted out plus no floor mats.
The parts which are lighter than oem:
advan GT rims
Girodisc 2 piece rotors
penske coilovers
ppe headers
ARH stainless mid pipe
Meisterschaft Ti axelback
Full Carbon hood
RR lithium battery
T demand front control arms
Figs rear upper & lower links
Blitz strut bar (instead of oem triangle one)
Stuff I added which gained weight:
Tom’s CF skirt kit
Tom’s rear diffuser (only slight heavier than oem)
CF mirror covers
3/4 xpel wrap
Tom’s chassis stiffening braces (all 3 sets)
I will say most of the mods were undetectable as far as performance goes (straight line acceleration) except for one, the rims. The car definitely feels faster with my Advans rims.
Rotational mass!!!
I thought the rotors would have given me the same kind of gain, but I never felt a huge difference via butt dyno. But with the rims, i definitely did.
With that said, i don’t think anything we do, less gutting the whole interior, is gonna reduce weight/increase acceleration by any substantial amount.
Just accept the F as is. Embrace it. I love mine. It never fails to make me feel special when I get behind the wheel!
Last edited by Mingofish; 02-14-18 at 06:47 PM.
The following 3 users liked this post by Mingofish:
02-14-18, 06:58 PM
#7
So...last time I weighed my car at the track on their corner scale, it was 3962 lbs.
With all the stuff I’ve swapped out, I thought it would be a more substantial difference....
Mine you this weight is with my trunk stuff gutted out plus no floor mats.
The parts which are lighter than oem:
advan GT rims
Girodisc 2 piece rotors
penske coilovers
ppe headers
ARH stainless mid pipe
Meisterschaft Ti axelback
Full Carbon hood
RR lithium battery
T demand front control arms
Figs rear upper & lower links
Blitz strut bar (instead of oem triangle one)
Stuff I added which gained weight:
Tom’s CF skirt kit
Tom’s rear diffuser (only slight heavier than oem)
CF mirror covers
3/4 xpel wrap
Tom’s chassis stiffening braces (all 3 sets)
I will say most of the mods were undetectable as far as performance goes (straight line acceleration) except for one, the rims. The car definitely feels faster with my Advans rims.
Rotational mass!!!
I thought the rotors would have given me the same kind of gain, but I never felt a huge difference via butt dyno. But with the rims, i definitely did.
With that said, i don’t think anything we do, less gutting the whole interior, is gonna reduce weight/increase acceleration by any substantial amount.
Just accept the F as is. Embrace it. I love mine. It never fails to make me feel special when I get behind the wheel!
With all the stuff I’ve swapped out, I thought it would be a more substantial difference....
Mine you this weight is with my trunk stuff gutted out plus no floor mats.
The parts which are lighter than oem:
advan GT rims
Girodisc 2 piece rotors
penske coilovers
ppe headers
ARH stainless mid pipe
Meisterschaft Ti axelback
Full Carbon hood
RR lithium battery
T demand front control arms
Figs rear upper & lower links
Blitz strut bar (instead of oem triangle one)
Stuff I added which gained weight:
Tom’s CF skirt kit
Tom’s rear diffuser (only slight heavier than oem)
CF mirror covers
3/4 xpel wrap
Tom’s chassis stiffening braces (all 3 sets)
I will say most of the mods were undetectable as far as performance goes (straight line acceleration) except for one, the rims. The car definitely feels faster with my Advans rims.
Rotational mass!!!
I thought the rotors would have given me the same kind of gain, but I never felt a huge difference via butt dyno. But with the rims, i definitely did.
With that said, i don’t think anything we do, less gutting the whole interior, is gonna reduce weight/increase acceleration by any substantial amount.
Just accept the F as is. Embrace it. I love mine. It never fails to make me feel special when I get behind the wheel!
The following users liked this post:
Mingofish (02-15-18)
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02-14-18, 09:08 PM
#8
02-15-18, 08:06 PM
#9
Driver School Candidate
If I can dig it out I will PM you or post a build sheet I put together when I was looking at an RC-F. I did not have a breakdown of dollars spent per pound lost - once I tallied up the total cost I started looking into other cars that provided a lighter platform to start. Back to the RC-F though, I bucketed my weight reduction stages as follows.
Free reductions by removing parts and tools at the track have already been flogged to death so I won't go through the list but you can easily drop 25 - 40 lbs for $0.
Performance modifications that also reduce weight - 75 - 150 lbs for anywhere from $10K - $30K or more (full Novel System or custom IN625 headers, CCB's rotors, Penske coilovers, Volk wheels)
- Exhaust from the cat's back dropping ~ 25 lbs or more with a full titanium system
- Headers - I think Novels would be the lightest (friend in Japan was quoted 10 kgs/22 lbs but I don't recall if that was with or without cats)
- Coilovers - up to 20 lbs depending on the brand - RRRacing, Figs, Lou, Josh, or rmsimmonsj can chime in?
- Brakes - Figs or RRRacing two piece rotors, or, carbon ceramic (ZR1 rotors, RB calipers) from Racing Brake - 25.6 lbs for all iron, 54 lbs for carbon ceramic all around
- Wheels - the stock weeks are roughly 27.5 lbs (front) and 29.5 lbs (rear) so you could go with Volks, Advan's or another light 19 inch wheel, without going to wide, and could drop another 10-30 lbs of unsprung rotating weight.
Daily driver acceptable weight focused upgrades - to me these are upgrades where weight reduction is the primary benefit.
- I guess you could put wheels on this list but I looked at wheels as a performance upgrade that also reduced weight (the performance piece being the ability to run wider tires).
- Battery - range of options and weight reductions varies, but RRRacing had an awesome setup for the dollars spent to the pounds lost.
- Carbon fiber hood - again, weight reduction and cost vary quite a bit
Track car - beyond the above you can get into polycarbonate windows, carbon fiber parts that are not part of the performance package ($$), swapping the seats (something I was going to do in Japan with an IS-F but wouldn't do for a daily in the U.S.), and gutting the interior. I think Lexus dropped more than 700 lbs off of their RC-F GT Concept so it can be done.
If you haven't checked it already, take a look at this thread for the RC-F
https://www.clublexus.com/forums/rc-...reduction.html
And another for the IS-F (for some ideas, pros, cons, etc.)
https://www.clublexus.com/forums/is-...reduction.html
Free reductions by removing parts and tools at the track have already been flogged to death so I won't go through the list but you can easily drop 25 - 40 lbs for $0.
Performance modifications that also reduce weight - 75 - 150 lbs for anywhere from $10K - $30K or more (full Novel System or custom IN625 headers, CCB's rotors, Penske coilovers, Volk wheels)
- Exhaust from the cat's back dropping ~ 25 lbs or more with a full titanium system
- Headers - I think Novels would be the lightest (friend in Japan was quoted 10 kgs/22 lbs but I don't recall if that was with or without cats)
- Coilovers - up to 20 lbs depending on the brand - RRRacing, Figs, Lou, Josh, or rmsimmonsj can chime in?
- Brakes - Figs or RRRacing two piece rotors, or, carbon ceramic (ZR1 rotors, RB calipers) from Racing Brake - 25.6 lbs for all iron, 54 lbs for carbon ceramic all around
- Wheels - the stock weeks are roughly 27.5 lbs (front) and 29.5 lbs (rear) so you could go with Volks, Advan's or another light 19 inch wheel, without going to wide, and could drop another 10-30 lbs of unsprung rotating weight.
Daily driver acceptable weight focused upgrades - to me these are upgrades where weight reduction is the primary benefit.
- I guess you could put wheels on this list but I looked at wheels as a performance upgrade that also reduced weight (the performance piece being the ability to run wider tires).
- Battery - range of options and weight reductions varies, but RRRacing had an awesome setup for the dollars spent to the pounds lost.
- Carbon fiber hood - again, weight reduction and cost vary quite a bit
Track car - beyond the above you can get into polycarbonate windows, carbon fiber parts that are not part of the performance package ($$), swapping the seats (something I was going to do in Japan with an IS-F but wouldn't do for a daily in the U.S.), and gutting the interior. I think Lexus dropped more than 700 lbs off of their RC-F GT Concept so it can be done.
If you haven't checked it already, take a look at this thread for the RC-F
https://www.clublexus.com/forums/rc-...reduction.html
And another for the IS-F (for some ideas, pros, cons, etc.)
https://www.clublexus.com/forums/is-...reduction.html
Last edited by TrackLight; 02-15-18 at 08:17 PM. Reason: Edited to add links to other relevant threads.
02-16-18, 05:16 AM
#10
Big ball it with the full Amuse Titanium exhaust. http://www.bulletproofautomotive.com...-titan-cat-set
https://youtu.be/peR_hGz3lJU
https://youtu.be/peR_hGz3lJU
I will say that the full Titan header-back exhaust weighs less than one muffler...well, at least that is how it felt...didn't weigh the stock one but it is significant.So...last time I weighed my car at the track on their corner scale, it was 3962 lbs.
With all the stuff I’ve swapped out, I thought it would be a more substantial difference....
Mine you this weight is with my trunk stuff gutted out plus no floor mats.
The parts which are lighter than oem:
advan GT rims
Girodisc 2 piece rotors
penske coilovers
ppe headers
ARH stainless mid pipe
Meisterschaft Ti axelback
Full Carbon hood
RR lithium battery
T demand front control arms
Figs rear upper & lower links
Blitz strut bar (instead of oem triangle one)
Stuff I added which gained weight:
Tom’s CF skirt kit
Tom’s rear diffuser (only slight heavier than oem)
CF mirror covers
3/4 xpel wrap
Tom’s chassis stiffening braces (all 3 sets)
I will say most of the mods were undetectable as far as performance goes (straight line acceleration) except for one, the rims. The car definitely feels faster with my Advans rims.
Rotational mass!!!
I thought the rotors would have given me the same kind of gain, but I never felt a huge difference via butt dyno. But with the rims, i definitely did.
With that said, i don’t think anything we do, less gutting the whole interior, is gonna reduce weight/increase acceleration by any substantial amount.
Just accept the F as is. Embrace it. I love mine. It never fails to make me feel special when I get behind the wheel!
With all the stuff I’ve swapped out, I thought it would be a more substantial difference....
Mine you this weight is with my trunk stuff gutted out plus no floor mats.
The parts which are lighter than oem:
advan GT rims
Girodisc 2 piece rotors
penske coilovers
ppe headers
ARH stainless mid pipe
Meisterschaft Ti axelback
Full Carbon hood
RR lithium battery
T demand front control arms
Figs rear upper & lower links
Blitz strut bar (instead of oem triangle one)
Stuff I added which gained weight:
Tom’s CF skirt kit
Tom’s rear diffuser (only slight heavier than oem)
CF mirror covers
3/4 xpel wrap
Tom’s chassis stiffening braces (all 3 sets)
I will say most of the mods were undetectable as far as performance goes (straight line acceleration) except for one, the rims. The car definitely feels faster with my Advans rims.
Rotational mass!!!
I thought the rotors would have given me the same kind of gain, but I never felt a huge difference via butt dyno. But with the rims, i definitely did.
With that said, i don’t think anything we do, less gutting the whole interior, is gonna reduce weight/increase acceleration by any substantial amount.
Just accept the F as is. Embrace it. I love mine. It never fails to make me feel special when I get behind the wheel!
Last edited by Ne1tHeRe; 02-16-18 at 06:13 AM.
02-20-18, 01:03 PM
#11
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