Menno van Rij Posted February 12, 2014 Report Share Posted February 12, 2014 Every now and then, I start thinking about a pair of Webers for my TR. In the past, we discussed the pros and cons of the 40 or 45 version, let alone the 42 version... I can get my hands on a pair of 40s and a pair of 45s. But I'm still on a fence. One of the items needed is a new manifold. I've read stories of ill-fitting Moss manifolds that need a lot of tinkering before they fit properly. Now, what's there to learn about proper manifolds for the 4-pot engine? I've even considered welding my own. Or is that too bold.....? Menno Quote Link to post Share on other sites
Don H. Posted February 12, 2014 Report Share Posted February 12, 2014 Menno, have you read TeriAnn Wakeman's page on Weber conversions? http://www.tr3a.info/WeberDCOEinfo.htm Quote Link to post Share on other sites
Geko Posted February 12, 2014 Report Share Posted February 12, 2014 (edited) Weberising is a bit out of fashion, Mikunising seems to be the new hip.... The kit fits the standard TR4 and TR4A manifolds in the examples so should work the same for TR3. http://www.v-performance.com/products/air_fuel.html MOSS just started selling those kits for MGs, likely to follow for TRs if the product sells well. Pricey as compared to the above though... http://www.moss-europe.co.uk/Shop/ViewProducts.aspx?PlateIndexID=22876 Edited February 12, 2014 by Geko Quote Link to post Share on other sites
Alec Pringle Posted February 12, 2014 Report Share Posted February 12, 2014 Hi Menno, you need Webers like a hole in the wallet. If you tune your exisiting engine to the max, then yes eventually your SUs might run out of ability to fuel the engine. Meanwhile Webers are unnecessary. They're not even desirable, they are Italian. Or worse, Spanish. Cheers Alec Quote Link to post Share on other sites
Rob Salisbury Posted February 12, 2014 Report Share Posted February 12, 2014 But the noise they make at full chat is worth every penny!! Cheers rob Quote Link to post Share on other sites
Guest Posted February 12, 2014 Report Share Posted February 12, 2014 Weberising is a bit out of fashion, Mikunising seems to be the new hip.... The kit fits the standard TR4 and TR4A manifolds in the examples so should work the same for TR3. http://www.v-performance.com/products/air_fuel.html MOSS just started selling those kits for MGs, likely to follow for TRs if the product sells well. Pricey as compared to the above though... http://www.moss-europe.co.uk/Shop/ViewProducts.aspx?PlateIndexID=22876 I see your point... a quick look on the website seems to tell that you can use the standard manifold... Now that's interesting! Menno Quote Link to post Share on other sites
Geko Posted February 12, 2014 Report Share Posted February 12, 2014 I see your point... a quick look on the website seems to tell that you can use the standard manifold... Now that's interesting! Menno yep i overlooked the Morgan... Quote Link to post Share on other sites
BlueTR3A-5EKT Posted February 12, 2014 Report Share Posted February 12, 2014 (edited) Why not 4 Amals or Reece Fish carbs? Or go the whole hog with SU DU6 twin chokes? - Talk to Paul Hogan or anyone involved in Cooper racing cars. Taken from a web page http://mk1-forum.net/viewtopic.php?f=4&t=4028 My brother has a pair of Weber 42 s on an ex USA single solid inlet for TR 3-4. If you want some dimensions PM me. Cheers Peter W Edited February 12, 2014 by BlueTR3A-5EKT Quote Link to post Share on other sites
Motorsport Mickey Posted February 12, 2014 Report Share Posted February 12, 2014 (edited) You need these DU6 on a road car like a fish needs a motorbike ! Bloody awful to run in mid range but had the advantage of a big hole when used under "full chat" like when they were used on the Cooper F1 cars with the FPF engine at 14,000 revs. I raced my TR4 in 1987 at Donington in the 6 hour relay race and used a pair of these, very sluggish in the 3500/4000 area ( charming...typical balancing revs mid corner for exit) and then the power came in like gangbusters above this area. They were that unpleasant to drive I was actually glad when my stint in the team was over, we immediately changed the carbs back to the 1 3/4 SUs for the following days race in the championship. Given that the DU6s had been set up in an afternoon it may be that a lot of rolling road time could be beneficial in getting them to run smoother, and the extra length inlet manifold (11" long !) we were experimenting with exacerbated the revs at which the DUs came on song. But when you consider that the reason these DU6 carbs were available, (there were only about 85 carbs made in total ) was that back in the early 60s the Cooper racers realised that the Weber was a much nicer carb and easier to tune and removed their DU6s and replaced them with Webers. Perhaps they had a point ! Mick Richards Edited February 12, 2014 by Motorsport Mickey Quote Link to post Share on other sites
stuart Posted February 12, 2014 Report Share Posted February 12, 2014 FWIW I think Phil Tucker has finally managed to get his set of DU6`s running right on his TR3s rep but then it is running a Fiat twin cam engine. Stuart. Quote Link to post Share on other sites
Tom Fremont Posted February 13, 2014 Report Share Posted February 13, 2014 Webers would be the first order of business if I ever get another 4-pot, not to gainsay anything above; it's just that I'm a total convert from the S.U. / Stromberg philosophy ( though they served me just fine on stock engines, 4 and 6 pots ). Cam, exhaust and headwork too in the mix of course. As for what's fashionable, I reckon Webers are as fashionable as anything TR and always were. After all, what that's Italian isn't ? Then again, fashion isn't for everyone, nor was it necessarily a priority for TRIUMPH aside from mercenary reasons. Quote Link to post Share on other sites
Malcolm Tatton Posted February 13, 2014 Report Share Posted February 13, 2014 Hardly dare ask but if we're going away from 'period' carbs, has anyone fitted modern motorbike carbs on a TR engine? Quote Link to post Share on other sites
Guest Posted February 13, 2014 Report Share Posted February 13, 2014 (edited) Hardly dare ask but if we're going away from 'period' carbs, has anyone fitted modern motorbike carbs on a TR engine? Dunno if it's one of us, but this looks good! (click on the pic for large) btw, what's the digital gizmo in the left corner of the pic above? Another pic, with another choke cable set-up Edited February 13, 2014 by Menno van Rij 2 Quote Link to post Share on other sites
Guest ntc Posted February 13, 2014 Report Share Posted February 13, 2014 As Alec said you gain nowt with a std engine Quote Link to post Share on other sites
Geko Posted February 13, 2014 Report Share Posted February 13, 2014 (edited) Dunno if it's one of us, but this looks good! (click on the pic for large) btw, what's the digital gizmo in the left corner of the pic above? Another pic, with another choke cable set-up The guy - Jim Gray- is a yank registered on a competitor's forum. There's a tread where he is sharing is experience including pics and schematics. Interstingly, he also provides hints about how to save costs and where to source the various parts from if not buying the whole kit from one single supplier (US) http://www.triumphexp.com/phorum/read.php?7,731964 The gizmo looks like an amp/voltage stabilizer Edited February 13, 2014 by Geko Quote Link to post Share on other sites
Ian Vincent Posted February 13, 2014 Report Share Posted February 13, 2014 FWIW I think Phil Tucker has finally managed to get his set of DU6`s running right on his TR3s rep but then it is running a Fiat twin cam engine. Stuart. Sorry Stuart, I think you'll find it is based upon an Alfa GTV 2000 engine (which could be called a Fiat twin cam because they own Alfa Romeo). Rgds Ian Quote Link to post Share on other sites
peejay4A Posted February 13, 2014 Report Share Posted February 13, 2014 (edited) Did I read right hat the Mikunis need to be jetted for a particular elevation asl? If so that's a big drawback in my book. Edited February 13, 2014 by peejay4A Quote Link to post Share on other sites
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.