A TR7 16V Posted September 12, 2019 Share Posted September 12, 2019 What size SUs were fitted to a 1980 Spitfire 1500? Graham Quote Link to comment Share on other sites More sharing options...
glang Posted September 12, 2019 Share Posted September 12, 2019 They were 1.5" items Graham Quote Link to comment Share on other sites More sharing options...
RobPearce Posted September 12, 2019 Share Posted September 12, 2019 Spitfire 1500 had SU HS4 carbs, except in US trim, where it was a single Stromberg 150CDSE. There were some changes to the exact variant of HS4 over the years but no fundamental replacement. HS4 and CD150 are both 1.5", as glang says. Quote Link to comment Share on other sites More sharing options...
A TR7 16V Posted September 12, 2019 Author Share Posted September 12, 2019 Oh well. The pair of 1500 Spitfire carbs on eBay in blackpool probably aren't worth buying to use on my 1300 IV engine, which has twin HS2s, then. Shame, cos the float chamber on the back one wobbles like buggery. Graham Quote Link to comment Share on other sites More sharing options...
glang Posted September 12, 2019 Share Posted September 12, 2019 Not unless youre planning on some serious engine tuning mods😍 Quote Link to comment Share on other sites More sharing options...
A TR7 16V Posted September 12, 2019 Author Share Posted September 12, 2019 I assume that on a Spitfire IV engine, they'll lose torque and flexibility for, maybe, a small power gain. Graham Quote Link to comment Share on other sites More sharing options...
A TR7 16V Posted September 12, 2019 Author Share Posted September 12, 2019 Doubled post cos of some deadlock error with the server. Like Pope said, "To err is human; to screw up propper takes a computer." Quote Link to comment Share on other sites More sharing options...
glang Posted September 12, 2019 Share Posted September 12, 2019 Yes without a hotter cam, modified head, extractor exhaust manifold etc cant see it would be an improvement although the 1300 has a reputation for revs so you could end up with a real screamer! Quote Link to comment Share on other sites More sharing options...
nang Posted September 12, 2019 Share Posted September 12, 2019 Graham, Are you sure that the bolt that holds the float chamber to the body is not loose.? Tony. Quote Link to comment Share on other sites More sharing options...
A TR7 16V Posted September 12, 2019 Author Share Posted September 12, 2019 Quoted from nang- Graham, Are you sure that the bolt that holds the float chamber to the body is not loose.? Tony. Not at all sure. But Doly is hors de combat (busted wheel stud and stuck on hub) at the moment, so I ain't tuning nowt I don't have to. But I'll look when it's safer. Thanks. Graham Quote Link to comment Share on other sites More sharing options...
RobPearce Posted September 13, 2019 Share Posted September 13, 2019 The bolt on my Spitfire's rear carb worked loose, so Tony may well be right. It's an easy fix if that's all it is. Quote Link to comment Share on other sites More sharing options...
A TR7 16V Posted September 13, 2019 Author Share Posted September 13, 2019 It's also been intermittently (when I aren't looking at it) overflowing a bit from the back float chamber top (not pot). So I may have to look at it this weekend; whether doly's fixed or not. Graham Quote Link to comment Share on other sites More sharing options...
RobPearce Posted September 14, 2019 Share Posted September 14, 2019 If the float chamber is loose, it might well get shaken around quite a bit, and the fuel in it could be sloshed out of the overflow. Quote Link to comment Share on other sites More sharing options...
A TR7 16V Posted September 14, 2019 Author Share Posted September 14, 2019 The bolt is tight, as in won't turn (I didn't try undoing it though) but I can feel both ends moving when I wiggle the bowl. I suspect the rubber betwixt has gone somewhere for a lie down. Graham Quote Link to comment Share on other sites More sharing options...
nang Posted September 15, 2019 Share Posted September 15, 2019 Just a fibre washer, from memory. Tony. Quote Link to comment Share on other sites More sharing options...
A TR7 16V Posted September 15, 2019 Author Share Posted September 15, 2019 Whatever it is, it looks to me like it means taking the carb off and stripping it, to get access to the bolt head propper. At which point I would also have to swap out the manifold cos the one that's on has 4" of 10mm OD copper pipe hammered into the fore end of the waterway, cos most of the steel one rusted to the point the hose wouldn't stay on if so much as touched when hot. And, really, I'd want the replacement drilled and tapped to take a vacuum take-off for a servo first - even if I just blank that for now. At which point it's all too big to do while I need the car. But one day soon... Graham Quote Link to comment Share on other sites More sharing options...
.thumb.jpeg.b15b81ef10abeea1c3039ae03c4a9f3a.jpeg)
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.