Lightweight hoods?

[prsrcokr]

I've been looking around and have seen some CF offerings in the past. Also see some on Ebay, has anyone had luck with these? Can you tell me what the weight of various ones is?
How about fiberglass, any weights on these or opinions?

I'm looking to drop some additional weight.
Thanks for the help,
Brian

 

[Rennat]

i know zankoku is retailer of carbon fiber hoods... might wanna get in touch with him and im sure he'd be glad to help you out.

 

[AjWit]

I just did a rear interior strip down last night, just the seats, carpet, and plywood. Front seats, carpet, and all plastic is still in the car though. That with the removing of my dual 10" subs should give me a decent weight reduction. I know i'm not going to see real gains from this but i wanted to do it.

 

[Van]

I've been looking around and have seen some CF offerings in the past. Also see some on Ebay, has anyone had luchk with these? Can you tell me what the weight of various ones is?
How about fiberglass, any weights on these or opinions?

I'm looking to drop some additional weight.
Thanks for the help,
Brian

Brian,
I found a very fine manufactuer of CF in Canada, who warranties their hoods for track use : http://www.geminicomposites.com/products/toyota_carbon_fiber_hood.html , but you may also place yourself into a very competetive class using that hood. I think from everything you've written before, that you will not make the same mistake I did by placing key modifications in areas that can't easily be removed...
Have you already removed some weight off the front and rear of the car, by removing the steel bumpers? I've read that Lexus bumpers made of aluminum can be modified to fit our cars. I simply removed all the material on the back of the bumpers, reducing the weight by 40%. Other areas, our power windows and additionally, all the glass removed and replaced w/polycarbonate to class specs.
I note that you are planning to improve the unsprung weight too. Have you decided which wheels you're going to run? Van

 

[Neodeuccio]

Brian,
I found a very fine manufactuer of CF in Canada, who warranties their hoods for track use : http://www.geminicomposites.com/products/toyota_carbon_fiber_hood.html , but you may also place yourself into a very competetive class using that hood. I think from everything you've written before, that you will not make the same mistake I did by placing key modifications in areas that can't easily be removed...
Have you already removed some weight off the front and rear of the car, by removing the steel bumpers? I've read that Lexus bumpers made of aluminum can be modified to fit our cars. I simply removed all the material on the back of the bumpers, reducing the weight by 40%. Other areas, our power windows and additionally, all the glass removed and replaced w/polycarbonate to class specs.
I note that you are planning to improve the unsprung weight too. Have you decided which wheels you're going to run? Van

Ooooo... Pretty...

 

[TurboFreak]

Brian, from what I've read over the years the stock hood isn't very heavy compared to carbon or fiberglass ones. Maybe consider just cutting some of the supports off the back of it then using hood pins make sure its secured? Would a carbon hood put you in a different class?

 

[SupraClaou]

Brian, from what I've read over the years the stock hood isn't very heavy compared to carbon or fiberglass ones. Maybe consider just cutting some of the supports off the back of it then using hood pins make sure its secured? Would a carbon hood put you in a different class?

What???
Stock hood goes for about 32 kgms + shocks :aigo: That's heavy
compared with my 9 kgm 'stoud' carbon hood ! :biglaugh:

 

[Hacki_sack_kid]

What???
Stock hood goes for about 32 kgms + shocks :aigo: That's heavy
compared with my 9 kgm 'stoud' carbon hood ! :biglaugh:

yeah now the only thing i can't decide is which kidney and lung to give up for it...:sarcasm:

 

[TurboFreak]

What???
Stock hood goes for about 32 kgms + shocks :aigo: That's heavy
compared with my 9 kgm 'stoud' carbon hood ! :biglaugh:

Yeah its been awhile since I've read anything about it so I could definitely be wrong.


OP: Check this thread out. Should give you some ideas.
$2008 Grassroots Challenge Supra Build

 

[arizzle]

Brian,
I found a very fine manufactuer of CF in Canada, who warranties their hoods for track use : http://www.geminicomposites.com/products/toyota_carbon_fiber_hood.html , but you may also place yourself into a very competetive class using that hood. I think from everything you've written before, that you will not make the same mistake I did by placing key modifications in areas that can't easily be removed...
Have you already removed some weight off the front and rear of the car, by removing the steel bumpers? I've read that Lexus bumpers made of aluminum can be modified to fit our cars. I simply removed all the material on the back of the bumpers, reducing the weight by 40%. Other areas, our power windows and additionally, all the glass removed and replaced w/polycarbonate to class specs.
I note that you are planning to improve the unsprung weight too. Have you decided which wheels you're going to run? Van

hey van.
gemini is accually not there anymore as i was told. i talked to my buddy who had the orange supra as the picture and he said they no longer make anymore CF parts and they dont even have a location no more but the site is still up. but ciir just a heads up before someone decides to buy one and you dont get a reply and a hood.:aigo:

but they seem to have new items but im going to try emailing them if they still have parts,

 

[SupraClaou]

I know good quality carbon hoods cost some serious $$$
But it is great having this thing on your car for 3 reasons
1) Most important ! Cooling reasons. A carbon hood should have
air vents. Not ram-air intake vents...air vent that allows the hot
air from the engine bay to get out. I have the stout hood:

I have seen decrease in temperatures of about 20-25 F'(10 C')

2) The front end of our cars is very heavy...
Taking away 20+ kgms (45 lbs) is a very respectable number

3) "Looks" . It looks very cool..... Makes the supra much more aggressive
:biglaugh::biglaugh:

 

[bryanintexas]

Brian, from what I've read over the years the stock hood isn't very heavy compared to carbon or fiberglass ones. Maybe consider just cutting some of the supports off the back of it then using hood pins make sure its secured? Would a carbon hood put you in a different class?

I can hold my CF hood by itself w/ 2 fingers. WWAAAAYYYY lighter than stock.

 

[TurboFreak]

http://www.supramania.com/forums/showthread.php?t=73524&highlight=stock+hood+weigh

Read up.

If you cut most of the bracing off the back of it then it weighs about 24lbs. I realize a carbon one weighs probably like 5-10 lbs but thats not really THAT much weight. EDIT: SupraClauo a couple posts up said his carbon hood weighs ~20lbs so thats only 4 lbs difference!


That link is AWESOME for people looking into weight reduction.

We're keeping doors and door glass, it's going to be a functional street car, just not really for everyone.

And we did some more weighing of the stuff just lying around.

• Complete front subframe just missing shocks and sway bars and on Sawblades with stock sized tires - 302lbs.
  
• Complete rear subframe minus shocks and sway bars on 18x9.5 XT-7's with 235/40/18s and including diff, but also missing the e-brake shoes on one side - 398lbs.
  
• TIP Suspension - 42lbs.
  
• Hatch with glass and hatch struts, no wiper, wiper motor or interior panels - 54lbs.
  
• Door with glass, speakers, wiring but no door panel or mirror - 70lbs.
  
• Steering column with switches and hub but no steering wheel - 19lbs.
  
• Headlight assy, no motor - 5lbs.
  
• Hood, which we cut out most of the support bracing under and just used 4 hood pins to hold it down - 24lbs.
  
• Front bumper support - 24lbs.
  
• Rear bumper support - 26lbs.
  
• Bride brix knockoff - 23lbs.

And that's all we had measured. I have sway bar weights somewhere as well, but they weren't too much. And I want to weigh the gas tank once I dump out the old gas.

But with that stuff, I'm still about 1500lbs short of what the car weighed.

And the R154 weighing 99lbs, sounds about right, I think that weight was without the bellhousing.

Does anyone have an accurate 7mgte weight, with accessories and turbo and misc. crap?

But for doors and hatch and hood, there's some savings, I will be doing a lexan rear window. But right now our stuff weighs 218lbs. And there isn't much that I'm going to take out of the door because I still want windows. So unless I can figure out a way to make them manual, they will be staying about that weight. I would like to make a better hood, but until I find someone good with fiberglass work, it probably won't happen. The gutted hood is good, it's just flexible and we're putting some venting/ducting into it, so it's going to have even less metal.

Tim

all those weights up there are great info, might be a good idea to compile that with the other weights list before this thread gets lost in time.

As I suspected the hood is far lighter than most people realize, even if you did take some bracing off. The doors were the thing I thought were going to be the worst and looks like thats the case. Too bad you cant just skin your cage and use window nets or lexan

The subframes are heavier than I thought they would be. Customizing your own with tube would be cool and I would love to see what you come up with.

 

[prsrcokr]

Brian,
I found a very fine manufactuer of CF in Canada, who warranties their hoods for track use : http://www.geminicomposites.com/products/toyota_carbon_fiber_hood.html , but you may also place yourself into a very competetive class using that hood. I think from everything you've written before, that you will not make the same mistake I did by placing key modifications in areas that can't easily be removed...
Have you already removed some weight off the front and rear of the car, by removing the steel bumpers? I've read that Lexus bumpers made of aluminum can be modified to fit our cars. I simply removed all the material on the back of the bumpers, reducing the weight by 40%. Other areas, our power windows and additionally, all the glass removed and replaced w/polycarbonate to class specs.
I note that you are planning to improve the unsprung weight too. Have you decided which wheels you're going to run? Van

Nice stuff Van, might be out of my budget though but very nice looking.
Yes, I have kept classing in mind but I'm not building for a race class yet just NASA/SCCA time trials at first. I've got some weight to lose (min. is 3530 for the mk3) and I was 3650 last week (comp. weight w/ me) That means the car is ~3435 w/o me and I'm installing a roll bar now (56 lb.) so even more can be removed. So far it's thanks to seats, wheels, flywheel/DS, battery (11 lb) and A/C. I'm running the RPF1's for wheels but only 235/255 widths for now, these are 17 lb. for a 17x10, not bad at all.. When I went on the scales after the spec miatas the official said 'Are you kidding a Supra, well at least his wheels are light' Same wheelbase as a E30 they said.
Oh yeah, I have a 88 Turbo M/T Sport roof so original weight was 3621 empty. That means I've removed about 185 lb. or so.
Brian

 

[prsrcokr]

Thanks for the links Ben, I'll sift through Tim's thread too for some pointers. I figured a hood is a good place to go next since it's front weight that sits up high (away from the C/G) Undercoating/sound deadening is an option but since it sits so low I'd rather look elsewhere first (within funding reason )
No a carbon hood wouldn't change my classing, it's points based or min. weight based (so cars underweight have a second option)
A hood like the stout one would probably add points though since it's got an intake duct, not just cooling vents. I like the style but wish they'd offer without that one vent.

I believe the hood was 45 lb. 99 sounds light for the R154 (or at least it feels heavier when trying to drop it slowly w/o a lift. I think the diff. unit (casing, axles, bolt in ready) was ~75. At an event last week a Trans Am guy thought it was 28-2900lb or so. He was shocked to see I was throwing around more weight than him!
Brian

 

[Evilempire1.3JZ-GTE]

I weighed the sound deadening in my 1986 supra hardtop supposed to be the year with the least deadening and the lightest mkiii.

The total was ~56lbs this was the material in front floor/rear floor boards under front rear seats from trunk are and wheel wells in rear arounds the tunnel.

If the noise is to terrible and the outside deadening doesnt do enough just get the spray its 10 x more effective and much lighter.

 

[prsrcokr]

I weighed the sound deadening in my 1986 supra hardtop supposed to be the year with the least deadening and the lightest mkiii.

The total was ~56lbs this was the material in front floor/rear floor boards under front rear seats from trunk are and wheel wells in rear arounds the tunnel.

If the noise is to terrible and the outside deadening doesnt do enough just get the spray its 10 x more effective and much lighter.

That was all sound deadening, no undercoating? That stuff adds up more than I thought.

 

[SupaMan]

I had a ga70 hood not to long ago that projectsupra made into a vented hood and that thing was light as hell i dunno if they were lighter over seas but this didnt have a whole lot of the supports cut out that i could see and it was super light easily half as light as my stock hood.

 

[OneJArpus]

Ooooo... Pretty...

very..

side note change TaSe to OneJArpus now lol, he still drives a supra

 

[RoadRaceMK3]

Nice stuff Van, might be out of my budget though but very nice looking.
Yes, I have kept classing in mind but I'm not building for a race class yet just NASA/SCCA time trials at first. I've got some weight to lose (min. is 3530 for the mk3) and I was 3650 last week (comp. weight w/ me) That means the car is ~3435 w/o me and I'm installing a roll bar now (56 lb.) so even more can be removed. So far it's thanks to seats, wheels, flywheel/DS, battery (11 lb) and A/C. I'm running the RPF1's for wheels but only 235/255 widths for now, these are 17 lb. for a 17x10, not bad at all.. When I went on the scales after the spec miatas the official said 'Are you kidding a Supra, well at least his wheels are light' Same wheelbase as a E30 they said.
Oh yeah, I have a 88 Turbo M/T Sport roof so original weight was 3621 empty. That means I've removed about 185 lb. or so.
Brian

Why only 235/255 widths on the RPF1s? I was thinking about getting those for my track car but I was going to try to squeeze much bigger tires on each. Also any pics with the RPF's?

And I saw this on suprastore but I have no idea about how much it weighs and how the fitment is:
http://www.suprastore.com/cafihofor87s.html