Popular Post kpr Posted November 13, 2022 Author Popular Post Share Posted November 13, 2022 Its actually made it off the dyno and onto the road. amazing I stole @Roman clutch sensor idea. spans 0-5v over clutch range. so can pick engagement point in ecu software, rather than mucking around trying trying to adjust a switch to right spot. So yeah set up launch control. On my shitty old concrete tyres i use on the dyno,would only take 2200rpm launch. then would cut loose again a 5k. I set up an ignition retard map, based on time after the lauch control switched off, so will pull timing and come on power less aggressive in 1st gear. then back to full timing by the time hit 2nd, which worked ok but pretty weak sauce acceleration> Found some slightly softer springs and did some shock adjustments which helped a little bit. but still ended it tyre fire Before swapping to some slightly better condition 195/45 14's. thought would try some other junk got hanging around Enter the 185/55 15 linglings first attempt = tyre fire. but after zinging the crust off them and running them at 15psi. got it to hook up at 3800rpm and able to get rid of the timing retard map. aint no drag car but seems to take off fairly decent for what it is 43 1 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted November 26, 2022 Author Popular Post Share Posted November 26, 2022 Done a few more tweaks and got a touch more out of it. fixed some stuff in the fuel system that was causing a few afr spikes. played with the injector timing, which seemed to give some small gains here and there, mostly noticeable right up top 9500+ Pretty much lined up with when afr richest = best. I had been running fixed 400 end of injection which worked pretty good for fixed number. heading towards 300 would result in massive loss in bottom end. but it did like a little less than 400 down there. right up top it liked over 400. So yeah running this engine with the big 980cc injectors is actually a benefit. Seems to be a touch of power in it. Even if there wasn't/isn't, would be wasting fuel, going to a smaller injector. since the injector would be open for so long, part of it wouldn't be burnt Bottom line is what it likes at wide open, ignore the rest of map haven't fill it out properly yet. Injector timing made some of the changes in fuel map slightly less aggressive, but yeah big cam itb tune always going to be all over the shop contrary to popular belief, something like this is harder to tune than a turbo engine making way more power. gains from last time in red the atlantic engine in dark green. I should probably try the big headers at some stage. think it will be really close to the atlantic curve. at least lose the power below 6k haha 16 1 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted November 28, 2022 Author Popular Post Share Posted November 28, 2022 So going back a few pages, I found what looks to be the dyno graph, just before last time took it to the drags so yeah should do stuff, maybe 21 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted December 1, 2022 Author Popular Post Share Posted December 1, 2022 little street pull/ sound check at start of this vid: 19 3 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted December 10, 2022 Author Popular Post Share Posted December 10, 2022 Managed a new pb yesterday, at least in na spec anyway 13.25 @ 105mph done a bunch of 13.6's. started at 3800rpm launch. kept putting it up as was bogging off the line. much different than with the 195/45 r14's, which would basically have to drive it off the line, but since the gearing was so low would pick up rpm fast enough to get an ok 60ft. with the 185/55r15's china tyres was super lazy, but surprising amount of grip. once got launch up to 5000rpm , 60ft started to drop. done a 13.4. next and last run put it up to 5500rpm. spun a little, went 13.25. with still pretty rubbish 2.10 60ft. 13.1 probably would have been doable with few more runs, but pretty happy with 13.2 . Should easily do a 12 with better tyres. but little clutch and t50 would be in a world of hurt. 22 Quote Link to comment Share on other sites More sharing options...
kpr Posted December 11, 2022 Author Share Posted December 11, 2022 Ol mate @Dudley not quite gettin them shots on the camera 3 Quote Link to comment Share on other sites More sharing options...
Dudley Posted December 11, 2022 Share Posted December 11, 2022 1 hour ago, kpr said: Ol mate @Dudley not quite gettin them shots on the camera Close enough though shaggy 1 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted December 24, 2022 Author Popular Post Share Posted December 24, 2022 VVTi version 3.0 up and running, on good engine. this time using stock pulley sizes Got issues with way too much travel on the 304deg cam though. its setup so max advance is just before piston to valve contact. Which isn't far off where i normally run this cam fixed. max retard is whatever the pulley travel is back the other way max retard is the pulley in "relaxed" position, so its at max retard when cranking. the ecu is reporting 69degrees travel, which is lots. since the cam is so big, it means the intake valves are open waaay into the compression stroke. No drama once engine is running, as can advance the cam. getting it running is the problem, its like trying start an engine with about 3:1 compression. I'll try a few more things in the tune. But best solution is going to be limiting to the pulley travel. 30-40degrees will be plenty enough, and should hopefully start a whole lot easier. Early days, but otherwise every thing seems good. no leaks and advances and retards like it should. 26 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted December 26, 2022 Author Popular Post Share Posted December 26, 2022 Managed to get it to start ok without putting a limiter in pulley. had to crack the throttles open quite a bit to let more air in. and messed with tune and cold start settings alot Only makes 70psi on compression tester when cranking. usually well over 250psi. can feel it blowing air back the throttles on compression stroke! so ive basically done the opposite of @Roman and turned my 4age into a prius engine. It actually idles best at full retard. like it has some weak little cams. The vvti is pretty slow it react. but 99% sure its just the oil feed line. i had to come off the oil pressure sensor hole. just used an an4 line had hanging around. will change to an6 see if fixes. Going to try get a little more advance out of it, piston to valve already pretty tight but, i'll gamble bending some valves for a little more, as it still gaining midrange with pulley maxed out. will also help with the prius engine issue. Good news is, its making good power on smaller cams. vvti setup is using 304/300 cams. Below is vs the 318/304 was running at os drags ignore the bump at end.. dyno being a diddle 13 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted December 26, 2022 Author Popular Post Share Posted December 26, 2022 so managed to get a little more advance out of it. another 5kw on the bottom end. power curve looking pretty sweet now. Rpm scale slightly off on this one. forgot change it when adding the stockish engine run (pink) Vs the 318/304 hvc cams, filled in the holes nicely. should drive heaps better. really nothing in it top end wise. Its even better than it looks on paper, since runs way nicer with the vvti and smaller cams 20 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted January 2, 2023 Author Popular Post Share Posted January 2, 2023 tried shortening the intake 30mm as the vvti turd seemed to like it. This thing said no. red is normal intake length rest are 30mm shorter with various vvti settings. nothing would pull the dip out and didnt make anymore peak tried air filter on/ off zero change in power Shut the bonnet, = 2kw more. same thing the turd engine did. Along with doing a few more tweaks to the vvti map and tune. managed to fill the dip before 8k. compared to last time: curve looks super nice for something with 300deg cams 19 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted January 16, 2023 Author Popular Post Share Posted January 16, 2023 I tried the outboard injection again . probably easiest to watch the video than me trying to explain it. but the gist of it, seems like theirs a tiny bit in it cooling or mixture wise. maybe 1-2kw but it seems like to me, that it moves the tuned intake length around a bit. shorter runner acts more like a longer one. It did make 167kw though. which i think is the new record 18 Quote Link to comment Share on other sites More sharing options...
Roman Posted January 16, 2023 Share Posted January 16, 2023 Very interesting, I'd have thought it would act like a shorter runner if anything - If you were making the air column more dense from the fuel then it you'd imagine that the speed of sound would go up not down. (like how its faster underwater than in air) Maybe its the extra inertia of the fuel that makes it behave like a longer runner rather than the speed of sound stuff. 2 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted August 10, 2023 Author Popular Post Share Posted August 10, 2023 so I tried the big headers i made ages ago, now engine is making more power. kinda same deal as last time. more up top, and a decent hit in bottom end so did some testing with some new exhaust setups after headers. then built something that would actually fit on the car made the below abortion, to replace the existing abortion for reference inlet and the outlet after the reso/muffler is 3" tube. Black is the big headers with the megaphone pipe. blue is small headers with the old pipe as in above graph. bit wiggly under 4k. but aint care about that. pretty good gains through midrange. has picked up the bottom end to match the what the old setup did. the megaphone pipe makes it fall over a bit sooner, but over all better. some fine tuning of the angle would likely help Im running a different collector on the big headers now. but yeh otherwise as below, 25 4 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted August 11, 2023 Author Popular Post Share Posted August 11, 2023 Ok, so the green line is the last time i tried the big headers. which happens to be the setup i ran a 13.5 1/4 on. And i thought the 146kw was about the most i was going to get out of it back then. not make over that number across a 3000rpm window Red is the atlantic car 21 2 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted August 25, 2023 Author Popular Post Share Posted August 25, 2023 So, i tried a whole bunch of different angle reverse cones, on my test pipe. the part that goes back down smaller to the muffler 18, 23 and 33 degrees included angle basically didnt do anything orange full exhaust. all others test pipe So yeah the orange run with full exhaust. its magically fixed itself and doesn't drop off up top anymore. not sure why, the connection to the big headers is pretty janky atm, so possible exhaust leak. or maybe the way it was on dyno wasnt right. was making 169kw uncorrected, so beat the crap out of it to get oil temps up till it cracked 170kw Atlantic engine = red My junker = blue The vvti is helping out here quite a bit. its amazing/cheating 29 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted September 15, 2023 Author Popular Post Share Posted September 15, 2023 Tried some different angle megaphones. nothing really happened up top. but below 5500rpm some various wigglyness happened 5 degree - blue 6 degree - red 9.5 degree - green straight - pink full exhaust - black full exhaust seemed to be down a touch up top on the rest. the stand out was the 5 degree. not because it made any more power. but because it was the nicest curve in low revs. The flat megaphone i made on full exhaust sounds terrible when cruising. kinda expected it to do this, as have had the same problem before. seems to be an issue with the pipe not being able to hold its shape like a round pipe would. Also it was made to the equivalent of 7 degree round megaphone, going by inlet and outlet area. no idea if this would be the right way to do it, or if there is any way it would act the same as a round pipe. Have built a new one that should be 5 degree equivalent. Added a divider straight down the middle, to stop it flexing. unsure if will have any effect on the wizardry Yep the rest of the exhaust still has all the metals. stainless, mild and aluminum seems to have stopped making the horrible noise on a short test drive. haven't dyno'd it yet. will be happy if acts similar to the 5 degree in blue graph. The headers currently have this diverging cone setup on them pre the above stuff. probably should have be testing from the choke point back. but have a good results with this setup in the past, seems to get you most of the way there when combo'd with the right muffler. Also over crawling under the car. 27 Quote Link to comment Share on other sites More sharing options...
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