David P Posted December 8, 2012 Author Share Posted December 8, 2012 (edited) I've had two afternoon windows in the weather conditions and have managed a couple stints in a cosy corner out of the wind. No pics from Thursdays tinkering, I was too busy racing the sunshine. Supercharger off and re-shimmed mountings and modified the insulation on induction elbow to clear bulkhead, inspected supercharger and rebuilt. There are a few left-hand only awkward bits, which were a lot more awkward with my dodgy digit. All is well. Today I had the charge-cooler off and on again, fitting new plugs, rocker off to "repair" oil-leak and fitted another hose-tail into boost side of manifold. All back together again as the sun went below the tree line on both occasions. Offagin. Shown 6, 2, 3, 5, 4, 1. 6 & 5 rusty, a souvenir off the Mad Max days, 4 & 3 oily, from leaky rocker-cover and 2 & 1 were just right. But baby bears bed are the tips that all look just fine. The RTV had almost no adhesion to the Liquid metal or the casting and lifted off easily except where I had scratched a line on the crack, so after three good scrubs with solvent degreaser, rinsed off with boiling water, then scrubbed 3 times in methanol, I gave it some scratches to think about and a super-thick mega-blathering with RTV. I was underwhelmed by the almost complete lack of adhesion of previous RTV repair, yet had no polythene product at hand to try, so had to use RTV again, this'll have to do for now. Edited December 8, 2012 by David P (see edit history) Quote Link to comment Share on other sites More sharing options...
scott87 Posted December 8, 2012 Share Posted December 8, 2012 I'd love to see this car :-D You are very close too, so i may be lucky! Quote Link to comment Share on other sites More sharing options...
David P Posted December 8, 2012 Author Share Posted December 8, 2012 I plan to run it at Santa Pod in the 'Spring', that'd be the best place to see. I've found a short tunnel on a one-way by-road to play with and a willing volunteer cameraman, after the remap I'll get a tunnel-run video clip. Quote Link to comment Share on other sites More sharing options...
scott87 Posted December 8, 2012 Share Posted December 8, 2012 I plan to run it at Santa Pod in the 'Spring', that'd be the best place to see. I've found a short tunnel on a one-way by-road to play with and a willing volunteer cameraman, after the remap I'll get a tunnel-run video clip. Ill happily film :-) Quote Link to comment Share on other sites More sharing options...
David P Posted December 8, 2012 Author Share Posted December 8, 2012 All being well, after Thursday I should have all the power I didn't need for the winter. Quote Link to comment Share on other sites More sharing options...
Rob_Mitchell Posted December 8, 2012 Share Posted December 8, 2012 Just caught up a bit David! finger looks sore but got to LOL, as i whack my hands at work all the time and never get the chance to laugh at others pain. Nice work keep it up! Quote Link to comment Share on other sites More sharing options...
David P Posted December 9, 2012 Author Share Posted December 9, 2012 (edited) It's amazing how awkward everything has become, wonky finger, wonky weather, wonky workshop access and wonky deliveries. The modified valve-body for the transmission won't be here in time to fit before the remap. So that just leaves bracket final tinkering and hope that the new supercharger pulley gets here in time. Edited December 9, 2012 by David P (see edit history) Quote Link to comment Share on other sites More sharing options...
David P Posted December 10, 2012 Author Share Posted December 10, 2012 (edited) I've had a tinker with the bracket top-section and triangulated the mounting which required mounting. It's now a 3-piece sky-hook bracket. Edited December 10, 2012 by David P (see edit history) Quote Link to comment Share on other sites More sharing options...
David P Posted December 12, 2012 Author Share Posted December 12, 2012 (edited) Frost tested during final-fitting, the Sky Hook Bracket lives. To align the pulley I shimmed the idler bearing to be flush with face of supercharger pulley and with a 'special service tool' across the faces, clamped it where it needed to be, then shimmed between centre-fixing and supercharger bracket with a thin washer and nipped the bolts up where it sat. I'm test-driving the new set-up before destruction testing on the dyno. Currently running reliably with a shoulder-less supercharger-pulley and an unforgiving Gates belt, will change to new pulley and Gatorback belt as they arrive. It looks as though the previous configuration was not that far short, a little slippage yet could boost to 11.5 lbs. (charge-cooler on) With new belt-configuration there's no slip and it boosts-faster to 11.5 lbs. (charge-cooler on) Without the charge-cooler there would be around 1 lb more. I'd reckoned the boost would be around 15 psi with this pulley, maybe it's a sign of good gas flow and cool charge? Pressure or not, it'll be pumping 747cfm @ 6,800rpm. The new pulley didn't arrive today, so I've swapped tomorrow's remap to Friday, the Gatorbacks then get an extra day to turn up too? Driving home in the forecast blizzard will be enlightening? Edited December 13, 2012 by David P (see edit history) Quote Link to comment Share on other sites More sharing options...
David P Posted December 13, 2012 Author Share Posted December 13, 2012 (edited) The new 4" supercharger pulley with shoulders and cross-hatching has arrived, now fitted and tested, ready for tomorrows twirl. Resolving belt-slip and discovering that boost is lower than expected, I'm tempted to use the 3.8" pulley for more psi, but curious to see what it'll do as it is. I'll save the 3.8" until after I've fitted the modified valve-body into the transmission and after winter has passed. The valve-body is now seven-weeks behind schedule and presently held-up at L.A. airport. The Gatorback belts are also overdue, not even a Robbing Tax Hoods ransom note yet. (Gates it will be then) I haven't yet upgraded the (chair-leg) hose-tails on the swirl-pot. (They'll survive a bit longer) The Water/meth system refit/upgrade is not completed. (Waiting delivery of final component)(and some better weather) Three wheels on my wagon and in need of an interim remap to keep the project rolling along. Edited December 13, 2012 by David P (see edit history) Quote Link to comment Share on other sites More sharing options...
David P Posted December 14, 2012 Author Share Posted December 14, 2012 Have an email, the valve-body will arrive today, in the nick of lateness. Quote Link to comment Share on other sites More sharing options...
David P Posted December 14, 2012 Author Share Posted December 14, 2012 (edited) CRACKED IT Dan couldn't fault it, so that must be "Official". Everything functioned perfectly. Zero belt-slip under any provocation(s) and it's boosting a steady 11lbs from before 3k rpm? Now the dog can see the rabbit, there's plenty of power for now and it's a pleasure to drive, even in the rain @ 5°C. After I've tinkered with the transmission and the control(s) of it, then sorted out the water/meth system and the HHO system. In the spring, I'll increase the boost a bit at a time up to 15psi. The Sky Hook Bracket proved sound and bhp still climbing @ 6,900rpm. Edited December 14, 2012 by David P (see edit history) Quote Link to comment Share on other sites More sharing options...
kill1308 Posted December 14, 2012 Share Posted December 14, 2012 Is that the sort of power figure you were expecting ? Quote Link to comment Share on other sites More sharing options...
David P Posted December 14, 2012 Author Share Posted December 14, 2012 Is that the sort of power figure you were expecting ? With 11lbs that looks fine, there's more power to be had, but after more needed works have been completed and warmer weather arrives. I'm pleased to have evicted the final Gremlin, this part of the project is plain old nuts&bolts maintenance and improvements from here on. Quote Link to comment Share on other sites More sharing options...
Gaz6002 Posted December 14, 2012 Share Posted December 14, 2012 What's the route from here to 600bhp, 600lb/ft and 40mpg? Quote Link to comment Share on other sites More sharing options...
David P Posted December 14, 2012 Author Share Posted December 14, 2012 (edited) What's the route from here to 600bhp, 600lb/ft and 40mpg? Left at the gate and a brisk walk to the Pub to celebrate enough not to bother wondering why you've misquoted me. Edited December 14, 2012 by David P (see edit history) Quote Link to comment Share on other sites More sharing options...
kill1308 Posted December 14, 2012 Share Posted December 14, 2012 With 11lbs that looks fine, there's more power to be had, but after more needed works have been completed and warmer weather arrives. I'm pleased to have evicted the final Gremlin, this part of the project is plain old nuts&bolts maintenance and improvements from here on. Ahh, I read 21lbs of boost for some reason... had a migraine yesterday and brain is still a bit fuzzy. That's not a bad figure I guess for 11lbs, Stock TT territory. Do you plan to go any higher than 15lbs eventually once you've enjoyed it for a while? Quote Link to comment Share on other sites More sharing options...
Gaz6002 Posted December 14, 2012 Share Posted December 14, 2012 Left at the gate and a brisk walk to the Pub to celebrate enough not to bother wondering why you've misquoted me. Sorry - you're right. It was 500bhp and 600lb/ft with 40mpg. My question still stands though. I'm genuinely curious. Quote Link to comment Share on other sites More sharing options...
JamieP Posted December 14, 2012 Share Posted December 14, 2012 It's been a long road but you are getting there now, being supercharged I thought the torque might be higher tbh, that's a long way down from even a stock TT. Quote Link to comment Share on other sites More sharing options...
David P Posted December 14, 2012 Author Share Posted December 14, 2012 Ahh, I read 21lbs of boost for some reason... had a migraine yesterday and brain is still a bit fuzzy. That's not a bad figure I guess for 11lbs, Stock TT territory. Do you plan to go any higher than 15lbs eventually once you've enjoyed it for a while? 15lbs boost is as far as I'd go with a stock N/A lump and as far as I'd go with the charger. Sorry - you're right. It was 500bhp and 600lb/ft with 40mpg. My question still stands though. I'm genuinely curious. Reduce supercharger pulley-size increasing boost +4lbs, better exhaust system, larger (75mm) t.b. maybe, re-time cams on dyno, add water/meth and HHO will all help in the numbers game. Watch this space. After the job list a post or two before. Quote Link to comment Share on other sites More sharing options...
David P Posted December 14, 2012 Author Share Posted December 14, 2012 (edited) It's been a long road but you are getting there now, being supercharged I thought the torque might be higher tbh, that's a long way down from even a stock TT. I'm pleased that it's now working properly and my gadgets have all survived the death or glory testing(s) with flying colours. The numbers don't tie up for me either, I had expected more torque than bhp, are the values same for both graphs? I'm curious to measure the crank and supercharger pulleys to confirm I'm using the correct figures to calculate supercharger rpm too. Edited December 14, 2012 by David P (see edit history) Quote Link to comment Share on other sites More sharing options...
wojtrek Posted December 15, 2012 Share Posted December 15, 2012 I just renewed my membership to see that dyno chart, really Great work! I presume 320 is at the wheels, the dyno chart says wheel torque, so I guess this is wheel power? and that dip before 3000rpm is due to the autobox not letting to go full throttle and downshifting? David, what sort of psi are you seeing at 1500-2000rpm? I wonder if having so much boost of idle is killing the bearings once again, I bow to your craftsmanship! you have fans in Poland Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 15, 2012 Share Posted December 15, 2012 I don't understand those graphs at all, why don't power and torque cross??? Well done at getting so far David, you are a tenacious old whatsit Quote Link to comment Share on other sites More sharing options...
wojtrek Posted December 15, 2012 Share Posted December 15, 2012 I don't understand those graphs at all, why don't power and torque cross??? They do, at 5252rpm as they should. If you put the left torque (red) graph over the right power (red also) graph, they will cross. But no idea what the greens stand for? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 15, 2012 Share Posted December 15, 2012 OK, I see now, why on earth don't they have them on the same plot / screen though?? Cheers. Quote Link to comment Share on other sites More sharing options...
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