kpr Posted October 9, 2016 Author Share Posted October 9, 2016 Top fail.. Results from stepped extractors, bottom of last page. Pink line is the 38.1mm extractors. Good gains from 6000rpm to rev cut with the stepped 38.1/44.5 extractors . Pretty impressive for 120mm length of smaller diameter tube. Before i stepped the 44.5mm extractors they basically matched the smaller 38mm extractors from 6000rpm onwards. Both versions of the 44's have the same massive hole between 4000 & 5500. Obviously getting reversion. Hopefully should be able to fix that with a different collector. 9 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted October 24, 2016 Author Popular Post Share Posted October 24, 2016 Started on a new inlet/trumpet setup, to get the extra 50mm runner length as tested with the mdf spacers. will be setup so i can add some extra injectors at a later date, like in this choice drawing: had a burn on the old boys lathe yesterday. machined ends off the existing trumpets and made some new ends. To get max room for extra runner length and new filter, have also modified the inlet manifold. tweaking it up so the trumpets aim at the cut out in the strut tower better. filter is just sitting there not mounted yet. 17 1 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted November 6, 2016 Author Popular Post Share Posted November 6, 2016 These are going inside the air filter. currently 75mm long. have left some meat at the bellmouth end, so can make them shorter if needed. otherwise if they work good will trim the excess off. They spigot onto the first section and will clamp the filter backing plate between. I shaped a bit of tool steel, to get the elliptical bell mouth shape Also made some more slip joints. for when i get around to making a new collector or 2, to test on big extractors. 10 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted November 12, 2016 Author Popular Post Share Posted November 12, 2016 Got the new trumpets on. pretty much the same results as when had wood test spacers in there, good gains. Now back to the exhaust side to fix the reversion at 5k. have started making a new collector 19 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted November 20, 2016 Author Popular Post Share Posted November 20, 2016 New collector. No change from the steep angle merge. I done a run open header and come away with about 50% hearing loss. Also interestingly it made it worse almost everywhere, compared with the exhaust on Might try smaller diameter collector or "choke" point after the merge. but the 38mm extractors have the same 2.5" collector an they work. So thinking the 44.5mm primary's are just too big even with the stepped runners. Still looking like going back to the 38mm's is going to be best. the massive loss below 6000rpm, isn't really worth the small gains up top. (i need to swap back to the 38's to confirm this) 16 Quote Link to comment Share on other sites More sharing options...
kpr Posted November 27, 2016 Author Share Posted November 27, 2016 put the 38mm extractors back on below is comparing the big and small extractors, both runs done on the same tune. looking at afr (pink line 38mm. blue line 44mm stepped) massive lean spot and no reversion with the 38mm. then from about 6500 onwards the big extractors make a little more power. but interesting thing is the gain isn't from the bigger tube. its the 38mm stepped section that has made the gains over the 38mm extractors. Also before i swapped back to the small extractors. I adjusted the cam timing to reduce overlap, hoping it would tame some of the reversion and gain some top end. but no deal, just made it slower.. for reference these are the 38mm's, the merge is nothing fancy, same 2.5" collector. dont really have any idea, other than the 44mm tube being to big thats causing the reversion ?? 9 Quote Link to comment Share on other sites More sharing options...
kpr Posted November 19, 2017 Author Share Posted November 19, 2017 Dug this out of the shed after 6 months, got a fresh wof and reg, then proceeded to some @Roman Dave science ali express wideband bungs pretty weak science. i only have 1 wideband so these are all different runs . some on different bits of road. bit of variance between cylinders. but nothing to be worried about or really any power to be gained by trimming cylinders. and yeh my tune is a bit screwed up. i think before i put it into hibernation for 6 months, i swapped back to the small extractors and didnt reload the right tune.. i'll fix that.. prob need to click to see full size: 8 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted June 16, 2018 Author Popular Post Share Posted June 16, 2018 Building a new trigger setup for this, similar to what i done on the hilux. Hilux i used the cam gearsl as the trigger wheel. starlet has aftermarket ali cam gears, and these sensors need a ferrous metal. so using the crank gear for the trigger, its 18 tooth. wiring is a little close to cambelt but should be fine. Need a single tooth on the cam so the ecu knows which cycle the engine is on. drilled and tapped the cam gear and shaped a bolt for the sensor to read, which is mounted in the backing plate. Got some fancy new pulleys. crank is a proper harmonic balancer . other one is water pump pulley. both are under driven and lighter than what come off it hopefully get it wired up tomorrow. see if it works. 18 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted June 30, 2018 Author Popular Post Share Posted June 30, 2018 Works, Started first attempt once i got the right sensors. turns out the sensors i had brought for hilux spares where the wrong ones. had ordered mp100701 instead of gs100701. look like the same shit but the mp100701 looks for a magnet rather than a ferrous metal. New triggers 18tooth crank + single cam. everything is cleaner. timing , injector duty etc. other bonus is will start at a lower cranking speed than a vr sensor setup old factory toyota 24+1 driven off exhaust cam. 13 Quote Link to comment Share on other sites More sharing options...
kpr Posted July 10, 2018 Author Share Posted July 10, 2018 Aluminum muffler fell apart. so made another one from junk had laying around and bits of the old muffler . isn't the prettiest thing ever but seems to work ok. and is a bit stronger its got some other fiberglass stuff/ bit of everything between the steel wool and the outside bit below it looks the same as the old one from outside.. 3 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted July 10, 2018 Author Popular Post Share Posted July 10, 2018 Remembered I still had this big Toda cam I brought about 8 years!? ago. back then i tried to use it with stock head and yeah, didn't really help the situation. Alot has changed since then, so ill give it another go Current kelford inlet cam on left toda on right. Kelford is 298deg advertised 9.5mm lift. toda 320deg 10.8mm. Doesn't sound like a huge difference on paper, but the kelford is designed to run on the stock bucket & shim setup. where is the toda needs to run under bucket shims or shimless 1 piece buckets. can see in the pic its a much more aggressive profile. Also means it wont spin without some mods to the head. pull the engine apart again.... Apparently there are some variances in the castings, some will take the bigger cams without mods. i think this head was on them, but got unlucky as it only hung up on one cam lobe, rest where super tight still. so did a mr bean and gave them all a zing valves and springs back in after a trim with die grinder trd gasket with a fresh copper coat in for round number 6? Since the gear on the exhaust cam to drive the stock cas isnt required anymore. i can run the current bigger inlet cam in the exhaust side, still a missmatch but will see what happens Currently awaiting some 1sz shimless buckets x japan. 17 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted July 26, 2018 Author Popular Post Share Posted July 26, 2018 Got the cam in, 1sz shimless buckets, thanks to @CorollaGT Other than the obvious, these are a whole lot lighter than the factory ones Cams in backwards. Have got the cams dialed in ballpark and a decent tune on it. some interesting results. its killed power below 6000rpm very similar to what the big extractors do. (currently running small extractors) power from 6000rpm to 7500 is basically the same. 7500 it starts to pick up and 8000rpm onwards its using over 10% more fuel. So the head work and inlet setup is working, since it will actually make more topend now. looking at injector duty pink line is baseline, only change is the cams. its running the same 540cc injectors back when it made 90kw at wheels on stock cams. then it was using 40% duty cycle. now its 60% As it sits would probably go back to the old setup. but has shown its worth trying a few more things. Have ordered an exhaust cam that should be a better match. 11 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted July 28, 2018 Author Popular Post Share Posted July 28, 2018 Been doing some more testing. switched to the big extractors, another big loss below 6000rpm. but about 5% more fuel required from 6000rpm to 9000rpm. 62% injector duty now, once corrected the afr. 55% more fuel than the 90kw run! usual deal pink old. others big extractors. can see its lean above 6k, but massive hole in lower revs other than being dead through the midrange. goes pretty good if keep it on song above 6000rpm. and the intake noise.... 10 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted September 23, 2018 Author Popular Post Share Posted September 23, 2018 So i brought a kelford 193hv-c exhaust cam to better match the toda 320deg 10.8mm. 193hv-c is a 304 10.1mm for shimless setup With the toda on the inlet side and new kelford on the exhaust side. results were basically the same as above, almost no change. got the shits with it and put it back in the shed. Fast forward to today, decided to try another setup: Inlet: 193hv-c exhaust cam 304deg 10.1mn Exhaust: 193-c inlet cam 298deg 9.5mm Yep mongrel another setup Against the log in the above post. big gains at 5-6k more than the injector duty shows since the afr isn't correct. engine actually works below 6k with this setup and pulls good from 5k. not bad gains through to 7500. from 8200 onwards the toda cam is the winner. But even though its lost some peak power and noise, overall this setup should be quicker. below is against the 193-c cams in both sides, in their correct locations. (same setup was running at oldshool drags a few years back) About 10% more fuel required from 5800 all the way to 9k. only change is moving the inlet cam to exhaust side, and new 193hv-c on inlet side all 3 Edit: do a skid 29 Quote Link to comment Share on other sites More sharing options...
kpr Posted October 5, 2018 Author Share Posted October 5, 2018 Ok had this on dyno today. same setup as above post. Place bets how much power it made.. winner gets slow golf clap For reference a stock blacktop 20bean 4age made 93kw on same dyno. 2 Quote Link to comment Share on other sites More sharing options...
kpr Posted October 20, 2018 Author Share Posted October 20, 2018 7 1 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted November 11, 2018 Author Popular Post Share Posted November 11, 2018 Ok 23 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted December 1, 2018 Author Popular Post Share Posted December 1, 2018 The above seemed pretty optimistic, and it was. found issue with the way it was tied on the dyno. was climbing off the rear roller when it come on cam at around 5000rpm. when torque started to drop at 7500rpm would fall back onto rear roller. then having to spin the rear roller back up to speed makes it look like it falls on its face after 8k.. dyno obviously takes into count the weight of the rear rollers to calculate power, but they aren't physically connected to front rollers or load cell Anyway tied it down properly and it spat out 146kw pretty consistently. 18 1 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted December 9, 2018 Author Popular Post Share Posted December 9, 2018 Last time at drags: 13.796 @ 102.22mph - 2.122 60ft yesterday : #22 (only change is inlet cam swapped to exhaust side and new bigger inlet cam + tuning) done 104mph in a couple of other runs, plus wasn't going full rapist on gear changes like last time. since 3 hours from home without back up vehicle. So yeh more power confirmed. if was set up for drags with some kinda slicks, would probably do a low 13 maybe very high 12. / break, so thats not gonna happen. Pretty happy with 13.5, not bad for a shitty old 4age with no turbo, in a chassis setup for going around corners Also thanks to the gc's that organized and ran os drags 17 Quote Link to comment Share on other sites More sharing options...
Popular Post kpr Posted January 13, 2019 Author Popular Post Share Posted January 13, 2019 So, thought i would try the small extractors on this setup. They look like this if you cbf'd scrolling back ^ up there somewhere. red line: big extractors blue line: small extractors green line : small extractors with inlet cam moved from 8deg advance to 10deg advance The near 20kw gain at between 4500 -5000rpm - was kinda expecting this, no surprises, some reason the small extractors just work. But beating the big extractors most of the way through to 7500 and only 3kw less peak was a surprise. especially after having to pull some fuel out past 6000rpm So yeh its way better on the street. and makes about as much power as a stock smallport at only 4700rpm. Basically a v8.. 22 Quote Link to comment Share on other sites More sharing options...
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