Nick Jones Posted May 6, 2015 Share Posted May 6, 2015 Looking at making a couple of plenum FI manifolds for the 1300/1500. Got some flanges laser cut...... ......and plenum backplates local engineering co made some dies to form a flare on 35mm OD tube in a small press Watch this space Nick Link to comment Share on other sites More sharing options...
esxefi Posted May 6, 2015 Share Posted May 6, 2015 the wall behind that press is far too clean nice flare tool.a good value engineers shop nearby is worth it's weight in gold. I've used the back of a socket from my toolkit before to make flares with some success although only with aluminium. Link to comment Share on other sites More sharing options...
Triumph-V8 Posted May 7, 2015 Share Posted May 7, 2015 Interesting! Although there is some work left ..... Keep us informed! Link to comment Share on other sites More sharing options...
James Posted May 7, 2015 Share Posted May 7, 2015 I'm keeping my Dellortos, I'm keeping my Dellortos, I'm keeping my Dellortos, I'm keeping my Dellortos, I'm keeping my Dellortos, I'm keeping my Dellortos, I'm keeping my Dellortos, I'm keeping my Dellortos… Link to comment Share on other sites More sharing options...
Nick Jones Posted May 7, 2015 Author Share Posted May 7, 2015 I'm keeping my Dellortos, I'm keeping my Dellortos, I'm keeping my Dellortos, I'm keeping my Dellortos, I'm keeping my Dellortos, I'm keeping my Dellortos, I'm keeping my Dellortos, I'm keeping my Dellortos… Sure, why not? DS chosen and fettled Dellortos will be fine. I'm just opening negotiations with a local guy with a stalled long term Spitfire project (it's been stalled about 10 years according to rumour) in the hope that we can do a deal no. 1 son can afford. Not that I've had a decent look at the remains yet. We also have a lead on a Herald estate that "runs but has been parked in a wood for 10 years". Apparently it is "quite rusty"!! Not sure I even want to look at that one. Was talking to a bloke last night with a tuned MGC on triple Webers. After being somewhat dismissive about EFI on classic cars he then let slip that his does between 7 and 14 mpg........ flippin' heck....... I suggested it might need a rolling road tune but apparently it's already been to "the best in the business"........ Yeah. Ok then. Nick Link to comment Share on other sites More sharing options...
James Posted May 7, 2015 Share Posted May 7, 2015 I do feel sorry for those that buy them just because the catalogue says +300bhp etc and end up with a drinking, un-drivable monster— Link to comment Share on other sites More sharing options...
Triumph-V8 Posted May 8, 2015 Share Posted May 8, 2015 The skill, efforts and the prices for equipment for setting up Webers or Dellortos are often underestimated. It is a big advantage that you have the rolling road built in as you have the required measuring and loggging equipment in the EFI system and need no more parts for metering. So from the power that can be achieved both systems are not that far away from each other but the EFI can be brought close to perfection much easier and cheaper. Why not putting EFI throttle bodies on such a DCOE or DHLA car, they have a "look and feel" like Weber DCOE and same pattern to fit? One big problem that can be solved with that swap is the difference of location: In Italy, where the carbs are from, mainly cross flow heads are in use what keeps the carbs cooler. Our TR6 or other British engines have often the heating exhaust under the carbs what is possible but not perfect for DCOEs. Link to comment Share on other sites More sharing options...
JohnD Posted May 8, 2015 Share Posted May 8, 2015 Nick, This project looks to becoming dangerously Binkified! Looks so slick and thought out. John Link to comment Share on other sites More sharing options...
Nick Jones Posted May 8, 2015 Author Share Posted May 8, 2015 Steady on..... I'm making it up as I go along as usual. But thanks for a great compliment! Nick Link to comment Share on other sites More sharing options...
Nick Jones Posted October 7, 2015 Author Share Posted October 7, 2015 I've been very idle....... but some progress made recently. Laser cut flanges fit nicely Runners fit nicely into them Bit of CAD (also drawn Solidworks by my tame trainee draughtsman son for the laser cutter) and an inside shot Still deliberating on plenum size. So much conflicting info on the net. It's about 130% of displacement for the 1296 or 110% for the 1493 now. Vitesse one is 100% and has good torque and response but may be limiting the top end now. Injector pockets are made but are not quite right (shame as I've got quite a few) and will need fettling. Nick Link to comment Share on other sites More sharing options...
James Posted October 7, 2015 Share Posted October 7, 2015 Looks fab! Link to comment Share on other sites More sharing options...
Triumph-V8 Posted October 8, 2015 Share Posted October 8, 2015 Yes, great job! Keep us informed, looks very interesting. Will be a great improvement on this engine! Link to comment Share on other sites More sharing options...
GT6MK3 Posted October 8, 2015 Share Posted October 8, 2015 Looking good Nick. Whats the block to wheelarch clearance? Those trumpets ples planum plus cable clearance look way long! Link to comment Share on other sites More sharing options...
CHRIS211083 Posted October 8, 2015 Share Posted October 8, 2015 Glad some one is doing this. HS4 and 2's are crap!!! This looks like a real solution, Good effort Nick. Chris. Link to comment Share on other sites More sharing options...
Nick Jones Posted October 8, 2015 Author Share Posted October 8, 2015 Looking good Nick. Whats the block to wheelarch clearance? Those trumpets ples planum plus cable clearance look way long! They do don't they........ But in fact will be about 20mm less than the standard set-up including filter box. Which means I've cocked up as was meant to be the same! Nick Link to comment Share on other sites More sharing options...
Millstone10 Posted October 9, 2015 Share Posted October 9, 2015 They do don't they........ But in fact will be about 20mm less than the standard set-up including filter box. Which means I've cocked up as was meant to be the same! Nick Hi Nick I would look at putting a 12 - 15 degree depth change on the wheel arch side of your plenum. This makes a significcant change to the shocklosses around the trumpet intakes for the minimum depth change. You could do more that that was an economic sweet spot that we did on a mine ventilation system and is pretty common on intake plenums as well. This one is from the bottom... A couple of others are in the attached doc. Cheers Nigel Intake Plenum pictures.doc Link to comment Share on other sites More sharing options...
Nick Jones Posted October 9, 2015 Author Share Posted October 9, 2015 Thanks Nigel - that's going to challenge my fabrication skills...... Nick Link to comment Share on other sites More sharing options...
Millstone10 Posted October 9, 2015 Share Posted October 9, 2015 I think it can be quite simple. Just a bent sheet of AL over aa 4" plastic pipe to a D section. 2 flanges for either end with calculated height for the 12 deg reduction, then a flat baseplate over your rampipes.. There you are - proper CAD engineering... Link to comment Share on other sites More sharing options...
Nick Jones Posted October 9, 2015 Author Share Posted October 9, 2015 Ok, took a slightly different approach. Tubular plenum has become a truncated cone D80 at inlet D65 at far end. CAD Steel Bit fiddly but not too bad. Might revert to your suggestion for production versions though Nigel - more welding but offset by not having to roll a rather odd shape. Need a car to try it on now - while we have a Spitfire in the garage it is rather...... errr, "spread out" right now. Nick Link to comment Share on other sites More sharing options...
motov8id Posted October 10, 2015 Share Posted October 10, 2015 (edited) nicely done John. Air will be drawn from behind the radius intake runners so a fully radius inlet will improve airflow. The topic has been discussed here . tubing welded to the flared intake runner or slide the pleum out to meet the flange. Good luck Edited October 10, 2015 by motov8id Link to comment Share on other sites More sharing options...
CHRIS211083 Posted October 10, 2015 Share Posted October 10, 2015 Looks good Nick, Massive improvement over the stock carbs even if you don't weld the ram pipes flat to the radius. Chris. Link to comment Share on other sites More sharing options...
Nick Jones Posted October 31, 2015 Author Share Posted October 31, 2015 Injector pockets sorted and tacked up. I have a volunteer for a trial fitting too. Nick Link to comment Share on other sites More sharing options...
Nick Jones Posted November 7, 2015 Author Share Posted November 7, 2015 Fuel rail tacked up. Ready to see if it fits a car now...... Nick Link to comment Share on other sites More sharing options...
egret Posted November 7, 2015 Share Posted November 7, 2015 Nick What are the throttle body and injectors from & how did you decide upon injector type & angle? Were the components picked based on what you had on hand & was the injector angle based on the space available, or is there more to it than that? Thanks Link to comment Share on other sites More sharing options...
Nick Jones Posted November 7, 2015 Author Share Posted November 7, 2015 Throttle body and injectors are from K series 1.4. Injectors are 0280 155 884 (176cc/min). THis should be about right for 1300 but there is a huge choice of injectors available in same fitting plus some shorter ones which would still fit the cups. K series TB is readily available (at the moment), cheap, compact and available in a selection of butterfly sizes with the same package dimensions. Injector angle is 45º. Because it's easy to arrange - I don't think it's especially critical - works well on the Vitesse. Nick Link to comment Share on other sites More sharing options...
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