GT40s.com
MK-I  MK-II  MK-III  MK-IV  GULF  MIRAGE  J-CAR  LOLA
GT40s.com
Home Forum Gallery Support GT40s.com  
Register FAQ Advertisers Search Today's Posts Mark Forums Read

Go Back   GT40s.com > >

Notices

GT40 Build Logs For build threads and build diaries only.

Reply
 
Thread Tools Display Modes
Old 14th March 2012, 07:35 PM   #1
Dwight
Silver Supporter
United States
 
Join Date: Jul 2007
Location: Florence, Al
GT40: RCR GT 40
Posts: 282
Smile Dwight's RCR GT 40

I'm making a lot of changes to my 40, so this is not a build log but more of a rebuild log.

I have a lot of questions that I need to ask and I think this would be the best place to ask.

I'm adding a Gurney bubble during the repaint.

I read somewhere that someone used a foam when they installed a Gurney bubble.
I found a spray foam that Demand Product (PS75) sells, but I not sure if it's the correct foam for my use.
How much and what type do I need?

Thanks Dwight
Dwight is offline   Reply With Quote
Old 14th March 2012, 08:51 PM   #2
CESLAW's Avatar
CESLAW
Silver Supporter
United States
 
Join Date: Oct 2006
Location: Illinois
GT40: RCR
Posts: 1,527
Re: Dwight's RCR GT 40

Foam for the Guerny bubble. That is a new one on me.

Consider hex head nuts. They look like rivets and would be removable. The fiberglass pattern on the reverse side looks just fine once painted black. Anyway you will never notice the back side once it is installed.

JB Weld is easy to use and sets up slowly and holds well. Epoxy would also work if you want to permanently bond it.

If originality is the goal, the ridge around the edge should be left as is. (cleaned up of course). I would lean towards to painting it separately and the attaching it to preserve the crisp edge.

Can't help you with the foam
CESLAW is offline   Reply With Quote
Old 14th March 2012, 08:58 PM   #3
Dwight
Silver Supporter
United States
 
Join Date: Jul 2007
Location: Florence, Al
GT40: RCR GT 40
Posts: 282
Smile Re: Dwight's RCR GT 40

Thanks Chuck
I may have the painter mold the bubble into the top and not use screws. Maybe??


Dwight


P.S. your manual is a tremendous help, thanks again.
Dwight is offline   Reply With Quote
Old 14th March 2012, 11:43 PM   #4
Dwight
Silver Supporter
United States
 
Join Date: Jul 2007
Location: Florence, Al
GT40: RCR GT 40
Posts: 282
Smile Re: Dwight's RCR GT 40

Chuck I was looking in your book and saw a picture of the bubble you installed.

How much space is between the top of the door and the liner? If I read correctly you used epoxy to bond the top and liner together. This is the area I thought I would have to use the foam. I will use the epoxy.

Thanks
Dwight
Dwight is offline   Reply With Quote
Old 15th March 2012, 03:07 AM   #5
Brian Kissel
Lifetime Premier Supporter
United States
 
Join Date: May 2002
Location: usa
Posts: 679
Re: Dwight's RCR GT 40

Dwight

If you check Toms build log I think you will find the foam that was discussed. And also his reasoning behind it. The supplier info is there also. Look at post 119 on this page.

Toms RCR 40 Trackracer

Regards Brian
__________________
If you are not living on the edge, you are taking up too much space !!!!
Brian Kissel is online now   Reply With Quote
Old 15th March 2012, 11:26 AM   #6
EGLITOM's Avatar
EGLITOM
10 tenths
Germany
 
Join Date: Sep 2007
Location: Germany
GT40: RCR40;LR331;G50
Posts: 1,867
Re: Dwight's RCR GT 40

Dwight

you can also see how i installed the gurney buble in post #154

Toms RCR 40 Trackracer

TOM
__________________
RCR EUROPE by S-PERFORMANCE

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
EGLITOM is offline   Reply With Quote
Old 18th March 2012, 01:27 AM   #7
Dwight
Silver Supporter
United States
 
Join Date: Jul 2007
Location: Florence, Al
GT40: RCR GT 40
Posts: 282
Smile Re: Dwight's RCR GT 40

Thanks Tom

lots of good ideas

waiting on the bubble to arrive

Dwight
Dwight is offline   Reply With Quote
Old 18th March 2012, 01:22 PM   #8
CESLAW's Avatar
CESLAW
Silver Supporter
United States
 
Join Date: Oct 2006
Location: Illinois
GT40: RCR
Posts: 1,527
Re: Dwight's RCR GT 40

Quote:
Originally Posted by Dwight View Post
Chuck I was looking in your book and saw a picture of the bubble you installed.

How much space is between the top of the door and the liner? If I read correctly you used epoxy to bond the top and liner together. This is the area I thought I would have to use the foam. I will use the epoxy.

Thanks
Dwight
Dwight: Sorry for the delay in responding. Just had a chance to look at the inside of the roof of the GT, not something I notice much.

The gap between the liner and the top of the door was not significant, I would guess around an 1/8 or 3/16. (Memory fades with time). As noted in the book, gently securing the bubble with a couple of screws draws the two together reducing the gap further. Closing the gap with filler and sanding smooth the edge completes the process.

The finished thickness from the roof top to bottom of liner is around 1/4 all the way around. It really looks good. You won't have any problems.

Chuck
CESLAW is offline   Reply With Quote
Old 18th March 2012, 08:56 PM   #9
Dwight
Silver Supporter
United States
 
Join Date: Jul 2007
Location: Florence, Al
GT40: RCR GT 40
Posts: 282
Smile Re: Dwight's RCR GT 40

Thanks Chuck
I have not received my bubble. Is it one piece or two pieces unit?

Dwight
Dwight is offline   Reply With Quote
Old 18th March 2012, 09:09 PM   #10
Fran Hall RCR
Moderator
gt40fran's Avatar
gt40fran
I Have No Life
United States
 
Join Date: Sep 2001
Location: Michigan
GT40: RCR
Posts: 7,721
Re: Dwight's RCR GT 40

Dwight
We only got your cheque on Thursday...your parts shipped same day...

UPS shows you will receive them on Tuesday.....the tracking number is in your email.
__________________
FRAN HALL replica manufacturer.....

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Last edited by gt40fran; 18th March 2012 at 10:22 PM.
gt40fran is offline   Reply With Quote
Old 18th March 2012, 09:12 PM   #11
CESLAW's Avatar
CESLAW
Silver Supporter
United States
 
Join Date: Oct 2006
Location: Illinois
GT40: RCR
Posts: 1,527
Re: Dwight's RCR GT 40

Quote:
Originally Posted by Dwight View Post
Thanks Chuck
I have not received my bubble. Is it one piece or two pieces unit?

Dwight
It is one piece. Outer perimeter will likely need to be trimmed to make it symmetrical all the way around. Inside has a typical fiberglass print pattern but once painted black it looks just fine. You won't notice it on the inside once installed.
CESLAW is offline   Reply With Quote
Old 18th March 2012, 09:52 PM   #12
Dwight
Silver Supporter
United States
 
Join Date: Jul 2007
Location: Florence, Al
GT40: RCR GT 40
Posts: 282
Smile Re: Dwight's RCR GT 40

Thanks Chuck

Fran I just (five minutes ago) received UPS notice the parts will be delivered Tuesday. Thanks
I should finish rewiring the car this week and should be able to remove the windshield next week and install the bubble & demist grill.

Dwight
Dwight is offline   Reply With Quote
Old 18th March 2012, 10:18 PM   #13
Dwight
Silver Supporter
United States
 
Join Date: Jul 2007
Location: Florence, Al
GT40: RCR GT 40
Posts: 282
Smile Re: Dwight's RCR GT 40

just looking over some of my note and found something you guys can help with.

The fuel tank sending units, are they a three wire or two hook up. I have a shielded 2 conductor cable (black & white) to the dash but there is a blue wire terminated on the sending units. When I traced it out I found it butt splice to another blue wire (the other unit) and then cut, dead end. Do I need a third wire?

Dwight
Dwight is offline   Reply With Quote
Old 19th March 2012, 11:01 PM   #14
CESLAW's Avatar
CESLAW
Silver Supporter
United States
 
Join Date: Oct 2006
Location: Illinois
GT40: RCR
Posts: 1,527
Re: Dwight's RCR GT 40

Quote:
Originally Posted by Dwight View Post
just looking over some of my note and found something you guys can help with.

The fuel tank sending units, are they a three wire or two hook up. I have a shielded 2 conductor cable (black & white) to the dash but there is a blue wire terminated on the sending units. When I traced it out I found it butt splice to another blue wire (the other unit) and then cut, dead end. Do I need a third wire?

Dwight
Couple of pictures attached.

View of the opening for the bubble after inner liner glued to outside panel. You can see the seam and how tight it comes together. Hope this helps.

The sending unit has one wire. The second would be the ground. Each sending unit wire would go the the separate gauges. It has been five years since I wired it, but my recollection is that a short wire was connected from the sending unit cover plate to a chassis ground to assure a good ground connection and then the fuel gauge ground was joined to the common ground buss behind the dash. In other words only one wire per sending unit to the dash. No need to shield the sending uint wire since it is not RF sensitive.

Compare yours to the picture attached. If you have a different type of sending unit the wiring may be different.
Attached Thumbnails
Dwight's RCR GT 40-fuelsendingunits-jpg   Dwight's RCR GT 40-bubbleinstall5-jpg  
CESLAW is offline   Reply With Quote
Old 20th March 2012, 09:13 PM   #15
Dwight
Silver Supporter
United States
 
Join Date: Jul 2007
Location: Florence, Al
GT40: RCR GT 40
Posts: 282
Smile Re: Dwight's RCR GT 40

Fran I received the demister grill and Gurney bubble today. Thanks for the E-Z Wiring manual.



Thanks CESLAW

I do not know what units I have but here is a picture of one of them. The terminal post are labeled send, neg, post,
the blue wire was ran into the frame "box" behind the driver seat and abandon. I have not traced the two conductor under the dash to see how it is hooked up.


Dwight

Dwight is offline   Reply With Quote
Old 20th March 2012, 10:39 PM   #16
CESLAW's Avatar
CESLAW
Silver Supporter
United States
 
Join Date: Oct 2006
Location: Illinois
GT40: RCR
Posts: 1,527
Re: Dwight's RCR GT 40

Definitely different than mine. Do you have the Classic gauges? Could those have inductive pickups rather than mechanical floats, hence the need for a power source?
CESLAW is offline   Reply With Quote
Old 20th March 2012, 10:42 PM   #17
Dwight
Silver Supporter
United States
 
Join Date: Jul 2007
Location: Florence, Al
GT40: RCR GT 40
Posts: 282
Smile Re: Dwight's RCR GT 40

The gauges have RCR on them. I don't know who makes them.

Dwight
Dwight is offline   Reply With Quote
Old 21st March 2012, 08:27 PM   #18
dlindemann's Avatar
dlindemann
Lifetime Premier Supporter
United States
 
Join Date: Dec 2005
Location: Minnesota, USA
GT40: Lotus
Posts: 632
Re: Dwight's RCR GT 40

Dwight -

I may be wrong (I don't have one yet) but that appears to be one of the new Centroid senders < CENTROID PRODUCTS - Computerized Tank Display - Electronic Senders - capacitive fuel gauges >. Appear to be very nice units - this is what I'm installing in my Lotus project and SLC. I think this is what Fran is using as standard now.

Regards,
Dave L
dlindemann is offline   Reply With Quote
Old 21st March 2012, 08:31 PM   #19
Dwight
Silver Supporter
United States
 
Join Date: Jul 2007
Location: Florence, Al
GT40: RCR GT 40
Posts: 282
Smile Re: Dwight's RCR GT 40

Thanks
it's a very nice looking unit. I just need to check the wiring to make sure it's correct.

Dwight
Dwight is offline   Reply With Quote
Old 21st March 2012, 08:57 PM   #20
Dwight
Silver Supporter
United States
 
Join Date: Jul 2007
Location: Florence, Al
GT40: RCR GT 40
Posts: 282
Smile Re: Dwight's RCR GT 40

I did a search and found a diagram. Small picture and I'm wearing bifocals, but I think the pos post on the sending unit is fed from a hot circuit behind the ignition switch. That wire also feeds the dash gauge (meter).
The neg is ground and the send post is connected to the gauge (meter) I think the "S" terminal.
It may be a few days before I can remove the gauge and check it.

Thanks dlindemann
this is the information I need.
Dwight
Dwight is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

 
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 On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
windshield question RCR GT 40 Dwight GT40 Tech - Exterior, Interior, AC, & Trim 8 30th March 2012 03:04 PM
Dean Lampe's RCR GT 40 deckofficer All GT40 22 30th September 2011 02:35 AM
Rcr gt 40 CESLAW Video and Pictures Buffet 17 31st August 2011 11:06 AM
Engine specs for an RCR GT 40 CESLAW GT40 Tech - Engines/Induction/Exhaust 6 24th January 2007 11:45 PM
RCR GT-40 MichaelHarvey RCR Forum - RCR40/SLC/917/Superlite Aero 20 12th February 2005 01:26 AM


All times are GMT -4. The time now is 01:33 PM.