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Post by iparnell on Dec 16, 2014 19:56:31 GMT
I'm struggling to understand exactly how the fuel tank of my MX5 Mk1 1.6 actually fits into the Exocet. For starters only two out of the four holes actually line up and then there is the problem of the large bulge on the bottom. It hangs below the chassis by at least four inches which i'm sure is too much to space off the chassis.  |
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Post by nitram on Dec 16, 2014 20:50:43 GMT
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Post by iparnell on Dec 16, 2014 21:35:31 GMT
Thanks for that. I do appreciate it being a kit car and all that but even so surely the brackets for the tank (which by the sounds of it is standard) should be somewhere in the vicinity of the holes on the tank? The kit was designed for a Mk1 MX5....i'm wondering if the Eunos import has a different tank?
Is the Mk2 fuel tank any different to that of the Mk1 does anyone know?
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Post by miket on Dec 17, 2014 7:56:33 GMT
I've been offering my mk1 tank up for the first time this week. Four holes sit roughly above their brackets, but with either little (or no) overlap over some brackets, depending on whether it's fully aligned on any. Ie it's nearly right but not quite.
It seems that my 40mm spacers (a length I read somewhere) lift the tank high enough, though I've not yet done a full and proper fitting.
When I was buying a replacement tank this week I think I saw some adverts saying "for right hand drive" and some saying "1.6 early" (MX5 Heaven). These might be clues to differences or complete red-herrings.
Feel free to get in touch if you want to compare notes/tanks (as I'll have 2 soon).
You've got me worried now - hope my replacement tank is the right one!
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Post by biggunz on Dec 17, 2014 8:04:13 GMT
My mk1 tank was rotten so replaced it with a mk2 which seems bigger. The mounting holes however are in the same place. I just managed to use the brackets on the chassis in the correct orientation with some copper pipes between the tank and chassis as spacers.   Shaun |
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Post by miket on Dec 17, 2014 8:13:17 GMT
Oh and I think I've seen mention of the need for a heatshield between tank and exhaust and a way to keep spilt fuel away from heat. I've not got to the stage of looking to confirm these bits of info yet myself, but I mention just in case it helps avoid installing twice!
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Post by iparnell on Dec 17, 2014 11:30:56 GMT
I need to try and rotate it and lift to see how it works then. I've got to get some metal sheet to try and form the fuel shield as well. The frustration is that if the fuel tank has not changed then why doesn't it line up. Anyway, just another hurdle to overcome I guess...
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trident
Senior
Improvise, Adapt and Overcome
Posts: 629
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Post by trident on Dec 17, 2014 21:22:09 GMT
Wait till you get to the front wing stay brackets!
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Post by Stewart on Dec 17, 2014 21:34:37 GMT
Afaik the tank doesn't sit flat on the frame, it is spaced up to allow the sunken section to clear the subframe. I fabricated a u shaped box frame for the tank to sit on. Remember to rubber mount it as well so it doesn't fracture with classic movement/vibration and such like
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Post by iparnell on Dec 17, 2014 21:35:11 GMT
Miket, what material are you thinking of using for the heatshield? I got an off cut of 1mm ali sheet but its a real s**t to bend. Gonna look for some thin tin tomorrow..
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trident
Senior
Improvise, Adapt and Overcome
Posts: 629
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Post by trident on Dec 17, 2014 21:38:20 GMT
Miket, what material are you thinking of using for the heatshield? I got an off cut of 1mm ali sheet but its a real s**t to bend. Gonna look for some thin tin tomorrow.. Rather than bending it why not make it out of panels and rivet them together. I'm going to make a card template one first and then use the card as templates for the ali. |
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Post by iparnell on Dec 17, 2014 21:42:55 GMT
I wonder if that would suffice for the IVA?
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Post by nitram on Dec 17, 2014 22:08:23 GMT
The heat shield/drip diverter needs to be quite a complex shape. I had a go at fabricating one but, in the end, beat and bent one out of 0.5mm sheet Al and bolted in place. Not very pretty but it is concealed from public view and passed IVA- examiner was happy with photos. Picture on my build thread, page 4. Read more: mevowners.proboards.com/thread/3069/nitrams-build?page=4#ixzz3MC9ZKNgl |
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Post by iparnell on Dec 17, 2014 22:11:08 GMT
The heat shield/drip diverter needs to be quite a complex shape. I had a go at fabricating one but, in the end, beat and bent one out of 0.5mm sheet Al and bolted in place. Not very pretty but it is concealed from public view and passed IVA- examiner was happy with photos. Picture on my build thread, page 4. Read more: mevowners.proboards.com/thread/3069/nitrams-build?page=4#ixzz3MC9ZKNglYours look quite level...how much did you raise the tank by to allow the tank bottom bulge to fit, was it about 50mm? Also, did you rotate your tank by 180? |
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Post by nitram on Dec 17, 2014 22:17:52 GMT
By rotating the tank through 180, I only needed spacers of 10mm and 20mm - shown in page one of my thread. The other benefit of rotating the tank is that it is easier to engineer a filler arrangement that allows the tank to be filled full- again on page one.
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