Weight savings from carbon hood and FRP fenders?

[Fred Allen Burge]

Is there a significant weight savings with carbon hoods and fiberglass fenders?


I know there would be some weight savings but has anyone actually weighed them vs. stock parts for an S13 Silvia?


I'm building a drag/street car and trying to make some choices on the front end right now.


Thanks

[Goldeneye9mm]

well look at it like this. you're going to be adding weight with a roll cage bigger tires and stronger drive train so starting with fiberglass is a great idea. no to cf, it's mostly for show or strength and where you're putting those parts don't require any strength adding. do those and fiberglass doors, trunk and lexan windows will save you quite a bit. if you do it all you could save up to 100lbs or so. so yes they do add up but 1 or 2 won't be significant. good luck sir. plus you need to do a build thread if you do this. we dont see many drag build threads.

[PeaceOnesxWai]

headunit, speakers, and rear speaker brackets - 15.4lbs
driver and passenger door panels - 11.8lbs
plastic backseat panels - 5.0lbs
plastic B-pillar panels to back - 3.0lbs
back seats - 20.8lbs
hatch wall carpeting, plastic rear speaker panels, and rear floor mats - 20.6lbs
rear wiper, motor, grommet, and blade - 3.0lbs
jack tools, jack cover cardboard, random gray foam pads - 6.4lbs
rear strut covers, miscellaneous brackets & stuff - 2.8lbs
shift boot & panel - 0.6lbs
hatch area carpeting - 3.2lbs
A/C compressor, condenser, reservoir, & some piping - 29.2lbs
windshield wiper reservoir (full of fluid), bracket, & associated tubing - 9.0lbs
PAIR valve, actuator, bracket, and fasteners - 3.0lbs
sound deadening (Round 1) *box was 1 pound* - 10.8lbs
main carpet (from floorboard to rear seats) - 11.8lbs
glovebox - 3.2lbs
gauge cluster bezel - 1.6lbs
automatic seatbelts & lapbelt assemblies - 20.0lbs
power antenna - 2.0lbs
headliner, reading lamps, and shades - 4.0lbs
miscellaneous plastic pieces - 3.6lbs
plastic passenger floorboard panel (under glovebox) - 1.6lbs
center console - 3.0lbs
ABS unit mounting bracket - 3.2lbs
ABS unit - 15.8lbs
PS resevoir - 2.0lbs
PS line - 1.4lbs
fuel catch can & bracket - 1.8lbs
HICAS solenoid - 6.4lbs
rear HICAS rack - 10.8lbs
rear HICAS distribution block - 5.2lbs
clutch loop - 1.41bs
battery tray - 1.2lbs
SE exhaust & cat - 41.0lbs
sound deadening - 29lbs
spare tire & wheel - 28.0lbs
firewall mat - 18.8lbs
sunroof glass - 11.5lbs
foam layer on dashboard - 5lbs
Total of pounds lost - 377.9

[PeaceOnesxWai]

CF Hoods you will probably save around 20lb, Fenders maybe 5-10lb with FRP.

Theres also other stuff you can change out to lighten your car like Rims, Flywheels, Driveshaft, Windows.. Also you can shave some metal out of certain parts of the chassis to loose that extra weight but i would recommend reinforcing the body with some stitch welds.

[Fred Allen Burge]

Nice work!

[camaro379ss]

this isnt a hood but when I did my carbon hatch I saved 14lbs if I remember correctly. It got rid of the wiper but added the 3rd brake in the hatch.

I agree with the washer reservior weight thats the same that I got. Thats actually a nice list.

[chiboy002]

take the 2 pound firewall vibration reducer out from the engine bay under the brake booster

[S14DB]

no to cf, it's mostly for show or strength and where you're putting those parts don't require any strength adding.

CF is lighter. But, most Wet layup carbon out there is only 1 layer of CF and the rest is fiberglass. So they are just Fiberglass with a GF cover.

[One_love_silvia]

id say get a cf hood... idk how much s13 hoods weigh, but s14 hoods are heavy as fuck.

and if ur baller enough, get a dry carbon hood. that will be lighter than shit.