robgeev Posted March 3, 2004 Report Share Posted March 3, 2004 Has anyone Supercharged their 4? I know mine currently handles a bit scarey, but I think it could be a bit of fun, and an interesting task, now that the body is finished. Can you advise any suppliers that offer a kit? I know Moss do one for the MGB, but I haven't asked about the 4. Rob. Quote Link to post Share on other sites
Guest P Cobbold Posted March 3, 2004 Report Share Posted March 3, 2004 Rob, Yes you would find the car is transformed when supercharged. The Moss MGB kit wont fit the TR4 but the principles are the same for all motors. I shall be giving a talk at the International ( given a darkened room etc) on DIY supercharging. For us TR owners its likely to be a DIY job, but the Eaton blower used by Moss for the MGB would be ideal. Take a look at the BBS for blown MGBs to see the enthusiasm it is generating: http://www2.mgcars.org.uk/cgi-bin....ect=115 Peter Quote Link to post Share on other sites
graeme Posted March 3, 2004 Report Share Posted March 3, 2004 Peter, There have been a few superchargers on Ebay recently. These are usually brand new, removed from BMW mini cooper S when being uprated to a higher spec. Have a look at this one. http://cgi.ebay.co.uk/ws....y=43120 Do you know if these would be of any use on the TR 4 pot engine?? Regards Graeme Quote Link to post Share on other sites
Guest P Cobbold Posted March 3, 2004 Report Share Posted March 3, 2004 Here's a rief description of a TR4-engined Morgan blown with classic superchargers. Note the all-important reduction in compression ratio. http://216.239.59.104/search?....e=UTF-8 I am sure I have seen mention of a blown TR4 in TR Action several years ago- I'll try to dig it out. Peter Quote Link to post Share on other sites
Guest P Cobbold Posted March 3, 2004 Report Share Posted March 3, 2004 Graeme, If the ebay blower is an eaton M45 derivative then its max air delivery is around 330cfm when driven flat out at 14000rpm. ( see Eatons data sheet at:http://automotive.eaton.com/product/engine_controls/superchargers.html That air delivery would give approx 6psi boost to a TR4 at 5000rpm. That will be comparable with the MGB kit. But I think it should be possible with a larger blower to go for 9 psi or even 12, with care. But that would need the M62 from Eaton. On the other hand beware of the physical length of the blower ( again see Eatons data) as there is not too much room ahead of the distributor on the TR4 engine. So the M45 might be better fit. Its not a decision ro rush, except that ebay bid price is at present very attractive. Peter Quote Link to post Share on other sites
Andy Moltu Posted March 4, 2004 Report Share Posted March 4, 2004 Supercharged TR4s do exist - didn't Pete Cox race one in days gone by. Quote Link to post Share on other sites
Guest P Cobbold Posted March 5, 2004 Report Share Posted March 5, 2004 Glen Hewitt fitted a marshall bower to a TR6- I have an article from Car and Car Conversions (IIRC) mag somewhere. I did not know about hisTR4. He also made some lovely siamesed SU pairs that would look- and work- great on a blower. The key to supercharging any motor is a low compression ratio, then almost any bower can be fitted. So can anyone tell me whether low-CR versions were made for the TR 2,3 and 4. With Tr6s there are overseas spec fatter heads, and for TR7s low CR pistons. But what about the earlier engines? If they were all 9.5 and mostly all been skimmed by now, then achieving a low CR reliably will be the major challenge. Can the new ali heads go down to 8.5? (The old grey Fergi tractors had around 5 I think- but that's a little on the low side!) Peter Quote Link to post Share on other sites
robgeev Posted April 6, 2004 Author Report Share Posted April 6, 2004 If i was to fit an Eaton M45 (Mini Cooper), what sort of compression drop would be required,would this be best done in piston (if possible) or by machining head/thick head gasket? Also, any ideas for carburation? Rob. Quote Link to post Share on other sites
Kiwifrog Posted April 9, 2004 Report Share Posted April 9, 2004 In Roger Williams book on restoring TR4-4a There is a passage that states that the TR250 had a lowered compression ratio compared to the TR5. I guess difference may be in the head design. Not much help to Rob, but maybe a reason to buy a 250 ?? Alan Quote Link to post Share on other sites
robgeev Posted April 26, 2004 Author Report Share Posted April 26, 2004 Awaiting for BMW employed pals to source M45 blower for me-watch this space (or watch space for bits of engine shrapnel!!!). Any more advice would be welcomed-ie links to pics of brackets, carb layout-whatever. Ta. Quote Link to post Share on other sites
1967TR Posted February 22, 2005 Report Share Posted February 22, 2005 I recently asked Moss Europe if they produced or had plans to produce a supercharger kit for the TR4, similar to the MG kits they have developed. They said "not at the moment" but that I should ask again in about 6 months. Does this indicate they're thinking about it. I feel that the more people enquire the greater chance we have of getting it considered. Quote Link to post Share on other sites
tony13579 Posted February 23, 2005 Report Share Posted February 23, 2005 to lower the compression ratio, I think all you need to do is remove a little metal from the pistons or around the valves? or thicken the head gasket Quote Link to post Share on other sites
Andy Moltu Posted February 24, 2005 Report Share Posted February 24, 2005 In Roger Williams book on restoring TR4-4a There is a passage that states that the TR250 had a lowered compression ratio compared to the TR5. I guess difference may be in the head design. Not much help to Rob, but maybe a reason to buy a 250 ?? Alan The 250 had the US spec low compression head as did the US 6's. I think some of the 250s had different port spacings which can complicate the use of after market manifolds. Quote Link to post Share on other sites
Mychael Posted March 9, 2005 Report Share Posted March 9, 2005 I'm actually a sidescreen man (3A) but noticed this topic in the forum and thought I'd contribute as well. You see I've just aquired a complete Judson supercharger taken off a TR3. It last was running 12yrs ago but is complete and can still be spun by hand. Cannot say yet if I got something good or a dud but it will certainly be rare here in Australia. So anyone with any usefull information to pass on, please contact me. Thanks, Mychael Quote Link to post Share on other sites
Mychael Posted March 9, 2005 Report Share Posted March 9, 2005 I'm actually a sidescreen man (3A) but noticed this topic in the forum and thought I'd contribute as well. You see I've just aquired a complete Judson supercharger taken off a TR3. It last was running 12yrs ago but is complete and can still be spun by hand. Cannot say yet if I got something good or a dud but it will certainly be rare here in Australia. So anyone with any usefull information to pass on, please contact me. Thanks, Mychael Quote Link to post Share on other sites
Nigel Lay Posted March 9, 2005 Report Share Posted March 9, 2005 I have followed the supercharger discussion with interest as I have always fancied the idea. Mychael's reference to the Judson supercharger brought back memories of a side valve Ford Squire estate which had one bolted on owned by a very ecentric guy at Plesseys where I did my apprentiship. If you put 'Judson Supercharger' into google there is a wealth of information on them. I must amit I had forgotten they existed. Nigel Quote Link to post Share on other sites
Mychael Posted March 15, 2005 Report Share Posted March 15, 2005 Totally off -topic but many yrs ago (late 70's-early80's) we had Plesseys here in Australia. They did 2 way radio repair. A mate of mine worked there, never knew it was an English company. Mychael Quote Link to post Share on other sites
1967TR Posted February 9, 2006 Report Share Posted February 9, 2006 I requested an update from Moss Europe last week about the progress on a supercharger kit for the TR4 cyl engines. They said that it was on the agenda but they were concentrating on the MGB at the moment. So here's hoping. Don't forget to inquire yourselves they need encouragement. Quote Link to post Share on other sites
unclepete Posted February 10, 2006 Report Share Posted February 10, 2006 Save all that messing about! I just carry a big bottle of nitreous oxide when the wifes not in the car and give it a squirt now and again!!! Unc Quote Link to post Share on other sites
DJN Posted February 10, 2006 Report Share Posted February 10, 2006 Do you administer it to the car or the driver? Dave Quote Link to post Share on other sites
unclepete Posted February 12, 2006 Report Share Posted February 12, 2006 Both! I always find it's good for a laugh!!! Unc Quote Link to post Share on other sites
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