Go Back   VetteMOD.com > VetteMOD Technical Discussion > Classic Corvettes

Reply
 
Thread Tools
  #461  
Old 05-16-2019, 12:43 PM
Kacyc3's Avatar
Kacyc3 Kacyc3 is offline
United States | Member
 
Join Date: Dec 2015
Posts: 26
My Photos: (0)
Default

Quote:
Originally Posted by 69427 View Post
Quote:
Originally Posted by Kacyc3 View Post
I kno wyou are looking for ways to reduce the weight of your car but have you done anything with the gas tank? I know with my 79 the tank sits on top of the frame and believe this is the same for your car also. Lowering the tank to be flush with the top of the frame would help your center of gravity and allow you to carry more speed through the turns.
Yeah, I've been trying to figure out my options with the fuel tank. I'm running stock location rear mufflers, so that gums up the works when trying to lower the fuel tank. So far the only decent option I've figured out is to fabricate a custom tank of about 8-10 gallon capacity versus the stock tank capacity (16-18 gallon range IIRC). The next thing I haven't figured out yet is if it would be better to make the smaller tank full height but narrow, and place it over to the right side to help get weight off the left side, or make the tank full width but shorter height to drop the c/g of the tank downward.

That's where I'm at currently. I appreciate your input here.

OBTW, anyone here know the weight of the early C3 fuel tanks?
Like this, would that leave you enough room for your exhaust? May have to wrap them to keep them from warming the tank.

[Only registered and activated users can see links. Click Here To Register...]
__________________
Cheap
Fast
Reliable

You only get to choose 2.
Reply With Quote
  #462  
Old 05-27-2019, 02:56 PM
69427's Avatar
69427 69427 is offline
United States | The Artist formerly known as Turbo84
 
Join Date: Mar 2008
Location: Clinging to my guns and religion in KCMO.
Posts: 2,727
My Photos: (2)
Default Rear spring hanger bolts.

I've been kicking around changing the rear hanger bolts. I'm presently using half inch diameter parts, but it looks like I could swap them out for 3/8" bolts, at a half pound weight reduction for the pair. Doing the math for the rear corner weight/stress (vehicle, driver, and full bumpstop suspension/spring compression), it looks like a grade five bolt would have a 4.8x tensile strength "safety" margin, and a grade eight bolt would have a 7.8x margin.

I don't know how easy it is to find 10" bolts in this size and grade, but I'd welcome any technical input while I'm looking for these things.
Reply With Quote
  #463  
Old 05-27-2019, 03:56 PM
rtj's Avatar
rtj rtj is offline
United States | Addict
 
Join Date: Nov 2011
Posts: 1,774
My Photos: (67)
Default

[Only registered and activated users can see links. Click Here To Register...]

Problem is they get some bending loads. Two different arcs, so not in line all the time. Maybe use a spherical bearing to reduce any bending. Just a thought.
Reply With Quote
  #464  
Old 05-27-2019, 10:03 PM
Housegarage Housegarage is offline
United States | n00b
 
Join Date: Jul 2008
Posts: 2
My Photos: (0)
Default

Small bending from cushions loading. Tension loaded. Use cables?
Reply With Quote
  #465  
Old 05-27-2019, 11:07 PM
rtj's Avatar
rtj rtj is offline
United States | Addict
 
Join Date: Nov 2011
Posts: 1,774
My Photos: (67)
Default

Cables, that is interesting.

The reason I think there is bolt bending is I used 1/4 inch grade 8 bolts on my rear sway bar (with a spacer tube between the TA and the sway bar). The bolt was always bent when disassembled. Sort of similar, two arcs of motion at either end.
Reply With Quote
  #466  
Old 05-28-2019, 02:43 AM
69427's Avatar
69427 69427 is offline
United States | The Artist formerly known as Turbo84
 
Join Date: Mar 2008
Location: Clinging to my guns and religion in KCMO.
Posts: 2,727
My Photos: (2)
Default

Quote:
Originally Posted by rtj View Post
[Only registered and activated users can see links. Click Here To Register...]

Problem is they get some bending loads. Two different arcs, so not in line all the time. Maybe use a spherical bearing to reduce any bending. Just a thought.
I gave the angularity thing some thought the other day (it's a C4 suspension on the car, but there is some fore/aft movement of the knuckle with travel) and
the smaller diameter bolts should be able to pivot about (with less bind than the present half inch bolts) in the spring and cushion holes. Theoretically, at least.

The spherical bearing is a clever idea , but it might cancel the weight reduction of the smaller bolts.
Reply With Quote
  #467  
Old 05-28-2019, 02:49 AM
69427's Avatar
69427 69427 is offline
United States | The Artist formerly known as Turbo84
 
Join Date: Mar 2008
Location: Clinging to my guns and religion in KCMO.
Posts: 2,727
My Photos: (2)
Default

Quote:
Originally Posted by Housegarage View Post
Small bending from cushions loading. Tension loaded. Use cables?
Cables is an interesting thing to contemplate in that application.
Reply With Quote
  #468  
Old 05-28-2019, 11:21 PM
rtj's Avatar
rtj rtj is offline
United States | Addict
 
Join Date: Nov 2011
Posts: 1,774
My Photos: (67)
Default

Cable would give some indication of wear too. You’d would see broken individual strands before failure. Probably available in very high tensile strength steel. Just have to figure out how to secure the ends. Great suggestion House garage.

Might have to ensure it won’t touch the tire when unloaded. I have cable travel limiters on my spc a-arms and was careful about that.

Last edited by rtj; 05-28-2019 at 11:24 PM..
Reply With Quote
  #469  
Old 06-03-2019, 11:03 PM
69427's Avatar
69427 69427 is offline
United States | The Artist formerly known as Turbo84
 
Join Date: Mar 2008
Location: Clinging to my guns and religion in KCMO.
Posts: 2,727
My Photos: (2)
Default Big block radiator dimensions?

Tied up at the relatives. I visited a local junkyard for a break in the action. I saw a radiator that might let me take a couple pounds off the car, but I don't recall the height and width of the stock radiator. Anyone able to help me out here? Thanks.
Reply With Quote
  #470  
Old 06-04-2019, 11:14 AM
BBShark's Avatar
BBShark BBShark is offline
United States | Garage Monkey
 
Join Date: Mar 2008
Location: Right here
Posts: 4,431
My Photos: (283)
Default

31 1/2" wide x 18" tall.
__________________
Reply With Quote
Reply


Thread Tools

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

Forum Jump


All times are GMT. The time now is 08:35 PM.
 


Design by: vBulletin Skins Zone
Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.