keltik Posted February 16, 2022 Share Posted February 16, 2022 Time to phone Julian Edgar and see if he'll lend you his gauges/books/wool Tufts/fly to nz and do a collaboration on shitty car aero 2 2 Quote Link to comment Share on other sites More sharing options...
Nominal Posted February 16, 2022 Share Posted February 16, 2022 9 minutes ago, keltik said: Time to phone Julian Edgar and see if he'll lend you his gauges/books/wool Tufts/fly to nz and do a collaboration on shitty car aero I've got a brand new one of those Dwyer Magnehelic differential gauges he used, but only measures up to 0.25 in water so probably too sensitive. AutoSpeed - Ultimate DIY Automotive Modification Tool-Kit, Part 3 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Roman Posted February 16, 2022 Author Popular Post Share Posted February 16, 2022 Another slight off topic, but it's been incredibly hard to try drive this car sensibly. So I've not had any good fuel economy results to see if it's hideously worse than before. I put the windscreen wipers back in and went for a drive over to Te Awamutu to pick something up. Results were good! While out driving I also had some thoughts about part throttle tuning. Mainly, what the hell are you actually trying to achieve at part throttle? Full throttle is easy. Get the maximum amount of air in there, then give it the right amount of fuel for max power, right amount of ign for max power. But part thottle there's so many considerations. If you maximize airflow at every cell you can end up with a weird wonky fuel table. If you try maximize power you run really rich and fuel economy isnt great. If you try optimize BSFC, then its gonna be running lean and boggy - so how do you transition that nicely into full throttle power mode. Also it seems with a nice smooth cam angle map you can still get a lumpy looking fuel table. So had a new idea. I'm going to try change the shape of the fuel map to look nicer, by committing atrocities on the VVT timing table to reduce airflow at strategic points. Fuel map currently looks like this, notice how at 40% throttle (blue line) There's shit all over the place up and down Looking at a slice of VVTI and VE settings overlapped, at 20% throttle: If I push the blue line up, (advance the cam) the red line should come down. (Fuck you, airflow) At least that's the theory. Will have a play over the next few days, will be interesting to see what the vvt and fuel maps will end up looking like taking this approach. 11 1 Quote Link to comment Share on other sites More sharing options...
Muncie Posted February 18, 2022 Share Posted February 18, 2022 I've got a pre-mounted Flexco strain gauge you just superglue it anywhere you want deflection data from and log it.... I'll give it to you if you can use it stick to your bonnet skin connect to a channel on your Ecu and it'll tell you if you have more downforce aerospace shit! 7 2 Quote Link to comment Share on other sites More sharing options...
Roman Posted February 18, 2022 Author Share Posted February 18, 2022 Keen as! Thanks will pm you Quote Link to comment Share on other sites More sharing options...
Popular Post Stu Posted February 18, 2022 Popular Post Share Posted February 18, 2022 Dear DaveScienceTM, I feel that with the forthcoming higher level of data acquisition (via strain gauges) that we the viewers need to blessed with higher level MS Paint graphs... these screenshots of Link fuel tables and VVTI vs VE tables are just not cutting it. Bonus points for incorporation of cock and balls insignia into said MS Paint graphics. Kindest regards Stu 4 12 Quote Link to comment Share on other sites More sharing options...
GARDRB Posted February 18, 2022 Share Posted February 18, 2022 On 16/02/2022 at 17:57, keltik said: Time to phone Julian Edgar and see if he'll lend you his gauges/books/wool Tufts/fly to nz and do a collaboration on shitty car aero Julian Edgar is either a pseudonym that Dave uses or Dave’s Dad 2 Quote Link to comment Share on other sites More sharing options...
Popular Post Roman Posted February 24, 2022 Author Popular Post Share Posted February 24, 2022 A few developments (not really) Have mentioned a few times that 4x100 wheels in 13" are incredibly hard to find. Apart from options from America drag honda scene if I wanted to buy brand new. So although I've known already what tyres I want to buy, need to make sure I could get wheels first. So guess what @Snoozin found for me on Marketplace? Lenso 7.5" wide 13" wheels with the 205/70/13 M&H dot rated tyres already on the bloody things... for less than a set of these tyres brand new. Stoked! Stoked to see that they clear the brakes, and have miles of clearance to the strut. These are a +25 offset so +35 or so would have been perfect to fit in the guards better... But I'm not complaining what so ever. Can. not. wait. to get back to the drags. The sidewall squish is just delightful. It's like these tyres are made out of dish washing gloves. Big thanks to @Stu for lending me the Stusiers and convincing me that drag tyres are 100% the way to go. Will be interesting to see how they compare. This combo is incredibly light, havent weight one yet though as I was keen to see if the brakes cleared or not. EDIT: Under 11kg for these, vs 14kg for 14" wheels with R888R. Sweet! There's a guy in Australia who races a stripped out Echo with a fairly standard engine, on standard ECU - runs 14.7s but with an absolutely incredibly 1.9 second 60ft. I'm currently closer to 2.2 60ft for a 13.8 at the drags so there's potentially still a bit left in the tank! Also in aid of finally ever making an exhaust (after just blowing this months exhaust budget on wheels) I've started printing some dude noodles to try figure out headers shape. Need to print some straight bits so I can lego something together on the car and see clearances etc. But it's exciting to see some tangible progress anyway. There's a reasonable amount of room for these, just have to try wiggle things around to find the best shape that gives good clearance to shifter cables and the steering column. So hopefully I can come up with a scheme so someone can help me weld a final version together without wasting too much of their time. Exciting! 32 3 Quote Link to comment Share on other sites More sharing options...
GuyWithAviators Posted February 28, 2022 Share Posted February 28, 2022 I’d lend you the rear wheels off my L250 Mira for drag runs. 12 inch skinny boys 6 2 Quote Link to comment Share on other sites More sharing options...
kws Posted February 28, 2022 Share Posted February 28, 2022 Is that the space saver spare? Quote Link to comment Share on other sites More sharing options...
GuyWithAviators Posted March 1, 2022 Share Posted March 1, 2022 5 hours ago, kws said: Is that the space saver spare? Nope lol. Factree base model wheels. Quote Link to comment Share on other sites More sharing options...
Roman Posted March 1, 2022 Author Share Posted March 1, 2022 Holy crap, that's tiny! haha. I think the 155 wide tyres with the 13" steelies should do - this way I can get a matching set of hubcaps on front and back 4 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Roman Posted March 1, 2022 Author Popular Post Share Posted March 1, 2022 I've been fondling some plastic shafts in the garage some more, reminds me of my childhood (playing with lego) Looks like I've got a good scheme coming together. Might need to push the whole lot over away from the shifter cable a bit more. Will need to take the middle part of the exhaust out to see what sort of angles I'll need from there. As all of these pipes will be much longer (but all straight hopefully) God bless rear facing FWD exhausts, eh? So the idea from here is that I will hopefully have a shape for each runner that can be made out of only two of these, so only 3 welds needed on each runner prior to the collector: So I'll put these lengths back into my 3d model with the exact cut lengths, then I'll print the a 2d profile of each part onto some paper and cut the parts to exactly the right lengths needed. I also need to buy or fabricate a flange, you can buy them for about $80usd but maybe it'll be cheaper to get one cut locally? As I've got the cad file for the shape. For the collector situation, no idea yet but I'm just going one step at a time 11 1 1 Quote Link to comment Share on other sites More sharing options...
cletus Posted March 1, 2022 Share Posted March 1, 2022 Autobend in east tamaki do a range of collectors and flanges (teeheehee) 48 minutes ago, Roman said: fondling some plastic shafts in the garage some more, reminds me of my childhood (playing with lego) Thanks for clarifying 3 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Roman Posted March 2, 2022 Author Popular Post Share Posted March 2, 2022 One of the chaps in Australia posted up dyno of his supercharged 1NZ results. So I mspainted a comparison (Happy now, @Stu?! ) (His red, mine blue) Pretty meaty through the midrange! Supercharger has about 35hp more at 3500rpm. But then runs out of puff before 7k and he's got to change gear a lot earlier. He's planning on taking it to the drags. Will be interesting to see how it compares! 15 5 Quote Link to comment Share on other sites More sharing options...
kws Posted March 2, 2022 Share Posted March 2, 2022 Do you know causes you to both kinda peak in power at the same point? Exhaust? Quote Link to comment Share on other sites More sharing options...
GARDRB Posted March 2, 2022 Share Posted March 2, 2022 Please keep the header colour scheme 5 2 Quote Link to comment Share on other sites More sharing options...
Roman Posted March 2, 2022 Author Share Posted March 2, 2022 14 minutes ago, kws said: Do you know causes you to both kinda peak in power at the same point? Exhaust? Think it's just a coincidence - most of these supercharger kits end up around 85kw mark. 1 Quote Link to comment Share on other sites More sharing options...
Popular Post cletus Posted March 3, 2022 Popular Post Share Posted March 3, 2022 So looking at the dyno chart, yours should be quicker as it has peak power for pretty much a full 1000rpm vs a much shorter peak on the s/c one? What rpm do you shift at and how much rpm does it drop? I'm looking forward to your exhaust upgrade on your prius powered Vitz. There's some words I never thought I'd write 8 8 Quote Link to comment Share on other sites More sharing options...
mjrstar Posted March 3, 2022 Share Posted March 3, 2022 I suspect the supercharged one would have a chunk more torque? well unless the supercharger setup makes too much heat and not enough boost. 1 Quote Link to comment Share on other sites More sharing options...
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