 Bontempi Flares / Fenders, Net weight savings |
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| Randal |
 Jul 4 2010, 11:52 AM
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#1
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Advanced Member  Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750  |
OK so to put on a set of Bontempi flares or fenders you cut out all the metal except the part where you hang the FG parts. Any idea on the net weight savings? |
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| brant |
Jul 4 2010, 06:30 PM
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#2
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914 Wizard Group: Members Posts: 11,620 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
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I'm curious to hear
I'm actually wondering if the FG might be heavier? a metal fender skin weighs nothing... I have one in storage (NOS) that I should go weigh... but my poor memory for 15 years ago says it might have been 7-9lbs with the outer targa skin and door jam intact. the FG might be more, not sure |
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| Randal |
Jul 4 2010, 07:07 PM
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#3
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
QUOTE(brant @ Jul 4 2010, 05:30 PM)  I'm curious to hear I'm actually wondering if the FG might be heavier? a metal fender skin weighs nothing... I have one in storage (NOS) that I should go weigh... but my poor memory for 15 years ago says it might have been 7-9lbs with the outer targa skin and door jam intact. the FG might be more, not sure If the steel is only 7-9 lbs, then it isn't worth doing, other than it looks great. I've picked up Bontempi's fenders and they are at least 10 or more lbs., actually I think more. Rich can do light weight ones, but don't lean on them. If I need more clearance I can add a FG lip to my existing flares. If you took your time it would probably look OK. |
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| J P Stein |
Jul 4 2010, 08:40 PM
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#4
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
My best guess would be :not much.
The HPH rear quarter pannel don't fit worth spit (dunno bout the fronts)......but I admit they do look nice at both ends. The most tire I can get under those rears is a 10 inch wide slick on 10 inch wide wheels. That works pretty good for the power the car has now. |
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| bam914 |
Jul 4 2010, 08:48 PM
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#5
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Member Group: Members Posts: 334 Joined: 23-November 03 From: Atlanta, Ga Member No.: 1,378 Region Association: None |
The GT flares that QSC sells on ebay are very light. I would say more then half the weight of the stock fenders.
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| Randal |
Jul 4 2010, 09:46 PM
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#6
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
QUOTE(Randal @ Jul 4 2010, 06:07 PM) QUOTE(brant @ Jul 4 2010, 05:30 PM) I'm curious to hear I'm actually wondering if the FG might be heavier? a metal fender skin weighs nothing... I have one in storage (NOS) that I should go weigh... but my poor memory for 15 years ago says it might have been 7-9lbs with the outer targa skin and door jam intact. the FG might be more, not sure If the steel is only 7-9 lbs, then it isn't worth doing, other than it looks great. I've picked up Bontempi's fenders and they are at least 10 or more lbs., actually I think more. Rich can do light weight ones, but don't lean on them. If I need more clearance I can add a FG lip to my existing flares. If you took your time it would probably look OK. The existing flares are nice, but limit me to a 9" slick. If I followed the original design, but just lifted, i.e., took about 2" off the lip and added a shaped fg lip it might not look terrible.  |
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| J P Stein |
Jul 5 2010, 08:49 AM
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#7
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
You need more tire in back.....but you already know that. (IMG:style_emoticons/default/biggrin.gif)
The 10 inch slicks are only a half inch wider than those cantis but their consruction is different and don't allow as much wobble. With some careful fittment of the HPH flares, I think you could get 11s under them. On the shibox, the 11s would fit on one side, but not on the other. With a 5 inch backspace on my 16 X10 wheels there is about 3/4 inches of clearance to the inner fender. Dropping the rear pressure too low has used up that space...the tires also wore funny.....we don't go there no more. 11s on those same wheels would knock that space down by 1/2 inch....and 1/4 inch isn't enough. The new Hoosier construction have stiffer sidewalls so 1/2 clearance may be enough....as I said, careful fittment....and a 1/4 inch spacer. A pic at too low pressure.....17 psi IIRC. Attached image(s) 
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| Randal |
Jul 5 2010, 09:44 AM
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#8
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
QUOTE(J P Stein @ Jul 5 2010, 07:49 AM) You need more tire in back.....but you already know that. (IMG:style_emoticons/default/biggrin.gif) The 10 inch slicks are only a half inch wider than those cantis but their consruction is different and don't allow as much wobble. With some careful fittment of the HPH flares, I think you could get 11s under them. On the shibox, the 11s would fit, but not on the other. With a 5 inch backspace on my 16 X10 wheels there is about 3/4 inches of clearance to the inner fender. Dropping the rear pressure too low has used up that space...the tires also wore funny.....we don't go there no more. 11s on those same wheels would knock that space down by 1/2 inch....and 1/4 inch isn't enough. The new Hoosier construction have stiffer sidewalls so 1/2 clearance may be enough....as I said, careful fittment....and a 1/4 inch spacer. A pic at too low pressure.....17 psi IIRC. Every time I look at that car I see some other interesting piece of work you did. How did you do build those (nice) front flares? That same approach might work with my rear flares, especially if I can find the metal already shaped to use as a template. But I'm guessing you built those by hand? I like the 17psi picture; a little squishy, but the car was hooking up. |
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| J P Stein |
Jul 5 2010, 10:14 AM
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#9
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
Well....it didn't pop off the rim......
We were searching for a bit more tracton (heat) via less pressure. The pressure drop was semi-effective, but the rubbing & the cupping on the inside edges of the tires were unacceptable. Now days it's 19-20 lbs back there. The new (this year) Hoosier carcass construction....including cantis....seems to be a move in the right direction. Turn in & transitions are much better. I just wish they had more sizes. A 9 X 15-16 straight side would be perfect for the front of a 914.....R25 compound would be a bonus. The DP Miata ( and other) guys get R25 cantis in 13 (or 14) inch sizes. They don't have to wait for heat. The front flares were hammer & dolly work (didn't even use much bondo (IMG:style_emoticons/default/biggrin.gif) )...cheep too...my hands were in better shape back then. (IMG:style_emoticons/default/biggrin.gif) I tried to expand the rears more to fit the bigger 10 inch tires & wheels , but gave up....thus the HPH flares. |
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| SirAndy |
Jul 5 2010, 01:44 PM
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#10
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Resident German Group: Admin Posts: 41,623 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(Randal @ Jul 4 2010, 08:46 PM) The existing flares are nice, but limit me to a 9" slick. Randal, you can get the stock style flares in 9"/11" width! I have a set that i am going to use on my car. They're at McMark's shop right now. And below are the wheels i plan to use with them ... Fikse FM10's, 9x17 with 245-45 and 11x17 with 315-35 (Hoosier Dot R's) ... (IMG:style_emoticons/default/bye1.gif) Andy (IMG:http://www.914world.com/bbs2/uploads/post-179-1147068696.jpg) |
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| Randal |
Jul 5 2010, 02:09 PM
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#11
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
QUOTE(SirAndy @ Jul 5 2010, 12:44 PM) QUOTE(Randal @ Jul 4 2010, 08:46 PM) The existing flares are nice, but limit me to a 9" slick. Randal, you can get the stock style flares in 9"/11" width! I have a set that i am going to use on my car. They're at McMark's shop right now. And below are the wheels i plan to use with them ... Fikse FM10's, 9x17 with 245-45 and 11x17 with 315-35 (Hoosier Dot R's) ... (IMG:style_emoticons/default/bye1.gif) Andy (IMG:http://www.914world.com/bbs2/uploads/post-179-1147068696.jpg) Those are nice wheel's Andy. Where did you get your 11" flares? |
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| SirAndy |
Jul 5 2010, 02:17 PM
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#12
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Resident German Group: Admin Posts: 41,623 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(Randal @ Jul 5 2010, 01:09 PM) Those are nice wheel's Andy. Where did you get your 11" flares? A.I.R. http://www.americaninternationalracing.com...246&page=59 (IMG:style_emoticons/default/driving.gif) Andy |
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| stewteral |
Jul 5 2010, 10:44 PM
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#13
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Old Member Group: Members Posts: 384 Joined: 4-December 07 From: Camarillo, CA Member No.: 8,424 Region Association: Southern California |
QUOTE(Randal @ Jul 4 2010, 08:46 PM) The existing flares are nice, but limit me to a 9" slick. If I followed the original design, but just lifted, i.e., took about 2" off the lip and added a shaped fg lip it might not look terrible. Responding to the Silver 914 with the dark riveted fender flares: 1) There are the same flares that I bought from www.Rennspeed.com 2) On my car, I'm using the widest flares that allow 9" rims in the front and 11" rims in the rear. 3) I DID cut the fender openings and think it looks OK...check out my photos to see what you think. Best, Terry |
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| Britain Smith |
Jul 6 2010, 09:40 AM
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#14
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Nano Member Group: Members Posts: 2,354 Joined: 27-February 03 From: Hillsboro, OR Member No.: 364 |
Even though the HPH flares might be heavy, they can still crack. I hit some cones going sideways on a wet course and crack the fender just behind the door.
It would be hell if I had the thinner, lighter versions. -Britain |
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| stewteral |
Jul 6 2010, 07:17 PM
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#15
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Old Member Group: Members Posts: 384 Joined: 4-December 07 From: Camarillo, CA Member No.: 8,424 Region Association: Southern California |
  QUOTE(stewteral @ Jul 5 2010, 09:44 PM) QUOTE(Randal @ Jul 4 2010, 08:46 PM) The existing flares are nice, but limit me to a 9" slick. If I followed the original design, but just lifted, i.e., took about 2" off the lip and added a shaped fg lip it might not look terrible. Responding to the Silver 914 with the dark riveted fender flares: 1) There are the same flares that I bought from www.Rennspeed.com 2) On my car, I'm using the widest flares that allow 9" rims in the front and 11" rims in the rear. 3) I DID cut the fender openings and think it looks OK...check out my photos to see what you think. Best, Terry Here are my photos....finally! |
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