Help with GRP Rear Framework

[MikeB]

Thought I'd start a new thread on this.
I was hoping this would be a quick job as it looked really straight forward, after some cursing I can't work out quite how to fit this. If I had a rear tub it would be easy!

I got the GRP parts from Handy as part of his kit.
GRP2 as shown in the photo has a 5 deg end and a 90 deg end. From the pdf for the rear panel it looks like they should both be 90. So should they be straight cut if not which way round does this peice go?

The modified 19mm diaganol tube (that links the GRP rear to the diff carrier framework) doesn't seem to line up either.
Is the position of the flat plate that the tank sit on correct?

Has anyone got the height off the build table for the rear most 25mm tube , if i have this I can weld up and make the diaganol to suit.

http://farm3.static.flickr.com/2250/5709942356_cc7aa04c50.jpg (http://www.flickr.com/photos/62740914@N04/5709942356/)
IMAG0213 (http://www.flickr.com/photos/62740914@N04/5709942356/) by mjb22001 (http://www.flickr.com/people/62740914@N04/), on Flickr

http://farm4.static.flickr.com/3035/5709388921_0d0c941d3c.jpg (http://www.flickr.com/photos/62740914@N04/5709388921/)
IMAG0211 (http://www.flickr.com/photos/62740914@N04/5709388921/) by mjb22001 (http://www.flickr.com/people/62740914@N04/), on Flickr

[MarkB]

From your pic i would say you have it upside down..:)

[MikeB]

the GRP tube or D13 (or both!) lol. think I'm upside down, which way is up I don't know anymore!
I tried the GRP2 in a few different positions that just where it was when I took the photo.
Looking at DS13 this could be upside down?

[MarkB]

The rear fibreglass sits at the same angle as if you were doing it as per the book, accept I angled the panel inwards so it looked better. downside of that was the book fuel tank is wrong shape...doh!:D

[MarkB]

Ummm right well you have all that boxyness to hold the bones on..yes? then from that there are two tubes running backwards and up at an angle(whatever it is I can't remember...10degrees?) well to fit the grp you end it there and don't need the round tube with bendy ends..:)

Plain as porridge?:)

[Richard Dryden]

D13 should be up the other way so that the 40 odd degree angle sits onto grp2, the connecting bars onto grp2 should be angled up by 5 degrees from the front face, will measure the height from the jig of grp2 and post tonight. hope this helps

[K4KEV]

Hi Mike.....here are a couple of piccies of my grp frame and I did it as per the same pdf drawing I cut a notch to get mine right

http://i465.photobucket.com/albums/rr12/gfowa/DSC01379.jpg

http://i465.photobucket.com/albums/rr12/gfowa/DSC01380.jpg

[davedew]

Mike,

GRP2 should be square cut both ends as per my original PDF that you are using. I did however in the end notch the end of the diagonal tube as per Kev's photos above.

The plates for the fuel tank want to sit inside of the diagonal tubes.

http://i831.photobucket.com/albums/zz233/davemdew/Haynes%20Roadster%20Pictures/Chassis/100_0739.jpg

Hope that helps

Cheers

Dave

[MikeB]

Thanks guys,

There seems to be two answers for the GRP2 tubes, one says angled one say straight.
Straight seems right to me.
Any other thoughts no this?

[MarkB]

Easy way use a rear panel to line it all up...:D

[davedew]

All I can say Mike is that I have made mine as discribed earlier, and have just fitted the GRP rear panel without any problems at all.

[baz-r]

bin d13 and tie in to your roll bar back stays or tubes then you can fit a good size tank as the tin back didnt have the strength the grp frame had.
i can stand on my unbraced grp frame and jump up and down and i must be 75-80kgs :rolleyes:
25l tank is just too small

what i need is the side dimention to get my tank design right as i have no grp yet (gap from bottom of grp tub to diff box and top of diff box to grp tub both level mesurements)

[MikeB]

It did seem that d13 eats space for a decent tank size. The roll bar would brace it quite well.

Anyone elses thoughts to this mod.
25 lt is a small tank, what range are people getting out of one?

[MarkB]

It did seem that d13 eats space for a decent tank size. The roll bar would brace it quite well.

Anyone elses thoughts to this mod.
25 lt is a small tank, what range are people getting out of one?

Yep use the roll bar rear stays to brace things as way too many tubes just means the car is heavy for no reason

[davedew]

Both myself and Gus have got all the steelwork in the rear section of the chassis as shown previously. By making the tanks taller instead of wider Gus has got a 40ltr tank & I have got a 30ltr tank.

[baz-r]

wider is lower and space is wasted with d13's inplace is my take on it
you would get a bigger boot too this was my main reason for doing it as i did want to tour in mine and it also opened up a bigger choice of tanks from other kits and tintops

if you wanted to be extra safe you could always link in the corners of the grp frame else where with some custom tubes