qkingston Posted February 11, 2021 Report Share Posted February 11, 2021 So I cut one out of 18swg sheet ali after reading a previous post by Mick, cut out in a single piece, pretty pleased with the fit. I will screw with No6 cs screws so it is removable, sealed when finally fitted of course. If anyone wants a paper template, PM me Rgds David Quote Link to post Share on other sites
Motorsport Mickey Posted February 11, 2021 Report Share Posted February 11, 2021 (edited) 57 minutes ago, qkingston said: So I cut one out of 18swg sheet ali after reading a previous post by Mick, cut out in a single piece, pretty pleased with the fit. I will screw with No6 cs screws so it is removable, sealed when finally fitted of course. If anyone wants a paper template, PM me Rgds David Great job David, cutting the panel out in 1 is advanced skills. Mick Richards Edited February 11, 2021 by Motorsport Mickey Quote Link to post Share on other sites
qkingston Posted February 11, 2021 Report Share Posted February 11, 2021 There was a lot of bits of cardboard in the process, tricks learnt from the Cobra build! David Quote Link to post Share on other sites
qkingston Posted February 11, 2021 Report Share Posted February 11, 2021 And Mick has corrected me, I did it in 2mm Ally, takes the shape pretty well Quote Link to post Share on other sites
Upriis Posted February 11, 2021 Report Share Posted February 11, 2021 Sorry to hijack the thread, but how would an alloy firewall be fitted with a Surrey top. thinking about access to mounting bolts. thanks Neil Quote Link to post Share on other sites
Motorsport Mickey Posted February 11, 2021 Report Share Posted February 11, 2021 Tight area, but bolt access I think from the boot after removing the fuel tank, the side deck forward extensions from inside the cockpit with the side panels removed. Stuart will have done a few and likely will be along shortly to give a definative answer. Mick Richards Quote Link to post Share on other sites
qkingston Posted February 12, 2021 Report Share Posted February 12, 2021 One of reasons I have made mine removeable, but also I'm doing this in a major rebuild so I can sequence the work to secure the backlight first before finally fitting the firewall Rgds David Quote Link to post Share on other sites
stuart Posted February 12, 2021 Report Share Posted February 12, 2021 You access the rear bolts from inside the boot anyway as you really need the rear trim panel fitted first as its a tight fit up under the forward lip of the Surrey frame anyway and with the addition of a firewall it wouldnt be possible to fit after I dont think. Not that easy over the tank but doable with care and the only other fixings on a 4a/5/6 is the front stud which is done from inside anyway before fitting the small trim pieces, on a 4 you would if you have the original forward deck sections need to remove the side quarter trim to get to that nut. Stuart.. Quote Link to post Share on other sites
Rockie51 Posted February 13, 2021 Report Share Posted February 13, 2021 Bob, the tank is removed through the boot so the firewall is not a problem. Rockie Quote Link to post Share on other sites
ianc Posted February 13, 2021 Report Share Posted February 13, 2021 To avoid having to remove the tank, would it be possible to fit a firewall from the cabin side to a TR with the Surrey frame in situ, by making the firewall in two (or more) sections and then pop-rivetting these together once in place? Clearly, the sections would need to overlap, so it wouldn't just be a matter of slicing a firewall into two (or more) pieces - unless some overlapping pieces were added to cover the butt joints. I have no idea whether this is nonsense, so I am hoping that Stuart can give an answer. Ian Cornish Quote Link to post Share on other sites
Lebro Posted February 13, 2021 Report Share Posted February 13, 2021 1 hour ago, Rockie51 said: Bob, the tank is removed through the boot so the firewall is not a problem. Rockie That maybe true for a TR4, but not a TR3. Bob. Quote Link to post Share on other sites
stuart Posted February 13, 2021 Report Share Posted February 13, 2021 1 hour ago, ianc said: To avoid having to remove the tank, would it be possible to fit a firewall from the cabin side to a TR with the Surrey frame in situ, by making the firewall in two (or more) sections and then pop-rivetting these together once in place? Clearly, the sections would need to overlap, so it wouldn't just be a matter of slicing a firewall into two (or more) pieces - unless some overlapping pieces were added to cover the butt joints. I have no idea whether this is nonsense, so I am hoping that Stuart can give an answer. Ian Cornish The problem with trying to do it with the Surrey still attached is the inner lip of the Surrey covers the front lip of the rear deck which is where you need to fix it too, I suppose you might be able to fit some brackets to the top of the firewall that would hold it tight against the front edge of the deck and then slide it in under with a lot of sealer round it and then rivet it down the upright stays and then fit two side wings for over the wheel arches being careful of the wiring loom but I would think it would be very messy and still not really secure enough at the top edge. For how long it takes to remove the rear section I would just take it off then fit the firewall and the rear trim and then put the Surrey frame back first as last. Stuart. Quote Link to post Share on other sites
stuart Posted February 13, 2021 Report Share Posted February 13, 2021 31 minutes ago, Lebro said: That maybe true for a TR4, but not a TR3. Bob. I would use rivnuts and machine screws to fix it then so it would be relatively easy to remove, lets face it its not like you would need to take the tank out often. Stuart. Quote Link to post Share on other sites
Lebro Posted February 13, 2021 Report Share Posted February 13, 2021 Agreed, & I was thinking the same. Bob Quote Link to post Share on other sites
SeidelVC69 Posted February 15, 2021 Report Share Posted February 15, 2021 If its completly sealed to the boot you also stop the exhaust gas comming through the boot into the cockpit when there is a poor boot lid seal. Dieter Quote Link to post Share on other sites
silverfox4 Posted March 11, 2021 Report Share Posted March 11, 2021 Special thanks to David for mailing a copy of his rear bulkhead template across the pond - much appreciated Cheers, Alf Quote Link to post Share on other sites
Tr4aJim Posted March 12, 2021 Report Share Posted March 12, 2021 I installed the Revington “firewall” kit in my TR4A over the winter. I already had the interior in place when I did it, so it was more of a pain to install than if no interior. Still, wasn’t bad at all. Jim Quote Link to post Share on other sites
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