kpr Posted September 1, 2020 Author Share Posted September 1, 2020 17 hours ago, Roman said: I've got a new scheme I might print for you to try. Basically a runner with a smaller inner entrance but then a chamber area around the perimeter to see if you can amplify a reflected wave back down with minimal energy loss / max doorts Sweet keen to give them a jam. I also tried a runner inside a runner the other day, but my sizes were off. so didn't give the results i hoped. will get a pic tomorrow of what i was attempting Quote Link to comment Share on other sites More sharing options...
kpr Posted September 2, 2020 Author Share Posted September 2, 2020 So, black pipe is 37mmm id. orange 51mm. below chart is with the pipe slid in and out like pic one and pic 2 . red being out. blue being in. the pipe wasn't slid out as much as in pic one. but it didn't make a lot of difference how far out it was. What i was trying to do here, is to see if a 2 stage, small then big diameter variable setup is worth attempting. Obviously my pipe sizes are off and the outer would need to be a lot bigger. Since loosing 15kw over normal setup up to, and down low is acting like a smaller diameter pipe still. green line added is the big 51-62 pipes as per bottom pic getting rid of the outer 51mm run. leaving the 37mm in the position of pic 2 vs the big 51-62. Would likely be very hard to combine the 2 whilst having a working mechanical 2 stage without screwing up the flow on the high rpm side. but could be worth chasing with some different sized fixed setups to see if its possible. I would set it up opposite to what i've done here. so the inner smaller runner was fixed. the outer would slide back towards the engine creating a higher flowing shorter path. Doesn't look much in the above chart, so some numbers on this one. pretty decent gain at those low rpm's 2 Quote Link to comment Share on other sites More sharing options...
Celica RA45 Posted September 2, 2020 Share Posted September 2, 2020 have a look here Quote Link to comment Share on other sites More sharing options...
Celica RA45 Posted September 2, 2020 Share Posted September 2, 2020 and here these are fixed but gives you a idea 3 Quote Link to comment Share on other sites More sharing options...
Celica RA45 Posted September 2, 2020 Share Posted September 2, 2020 and iii will show pics 3 Quote Link to comment Share on other sites More sharing options...
kpr Posted September 2, 2020 Author Share Posted September 2, 2020 Yup. basically if i can get a setup that looks the same as that to match the top end of what i have now. then at low rpm have the outer bellmouth slide up against the bottom of the inner bellmouth. which will only allow flow through the smaller middle runner, increasing low end power Quote Link to comment Share on other sites More sharing options...
kpr Posted September 2, 2020 Author Share Posted September 2, 2020 black all fixed , red bit slides up for low rpm position or maybe like a slide throttle setup that sits at the bottom and blocks the outside runner at low rpm . so the runner would be fixed setup and slidy bits would do the work of selecting high/ low rpm inside only both Edit: / TVIS 2 1 Quote Link to comment Share on other sites More sharing options...
Celica RA45 Posted September 2, 2020 Share Posted September 2, 2020 you can cheat ,how many injectors are you using at the moment Quote Link to comment Share on other sites More sharing options...
kpr Posted September 2, 2020 Author Share Posted September 2, 2020 just 4. mounted in the throttles not far back from stock location Quote Link to comment Share on other sites More sharing options...
Truenotch Posted September 2, 2020 Share Posted September 2, 2020 So, does this mean that wave tuning is more important in the low/mid range and up top is all about mass flow? Quote Link to comment Share on other sites More sharing options...
Celica RA45 Posted September 2, 2020 Share Posted September 2, 2020 its a pity you cant move them back another 230mm away from the std spot like this here Quote Link to comment Share on other sites More sharing options...
Celica RA45 Posted September 2, 2020 Share Posted September 2, 2020 in the pic you can see the map sensor hose and air temp Quote Link to comment Share on other sites More sharing options...
kpr Posted September 2, 2020 Author Share Posted September 2, 2020 42 minutes ago, Truenotch said: So, does this mean that wave tuning is more important in the low/mid range and up top is all about mass flow? Not really, length works at both ends. so does diameter. Trying to combine the 2. on my first lot of tests best length for bottom end was 205mm. best for top end was 165mm. (or dropping way back to 65mm) but gains not worth the effort of a variable setup But combine the 205mm runner with with smaller diameter gives even more bottom end. then if can switch to the 165mm at top end with big diameter will have the gains from the airflow and correct length. Looks more worth chasing.. Would be a 2 stage variable length and diameter runner Would need to retest the lengths for the small runner to confirm. then see if its possible to get the power from the outer runner without the inner screwing the top end. 1 Quote Link to comment Share on other sites More sharing options...
Roman Posted September 2, 2020 Share Posted September 2, 2020 4 hours ago, kpr said: black all fixed , red bit slides up for low rpm position Wellll shit thas a friggen cool idea! 2 Quote Link to comment Share on other sites More sharing options...
kpr Posted September 7, 2020 Author Share Posted September 7, 2020 Made even bigger taper runners. the 2 on the left are new ones, 70mm - 52mm . then the red tape one is the 62mm-51mm that worked best so far. then the 51mm straight. Will be a little while before can test them. but the plan is to test them as is. then jam the small one down the middle. see if its possible to make top end power with the 2nd pipe in the middle. 8 Quote Link to comment Share on other sites More sharing options...
kpr Posted September 13, 2020 Author Share Posted September 13, 2020 Airbox testing : 2 1 Quote Link to comment Share on other sites More sharing options...
Celica RA45 Posted September 13, 2020 Share Posted September 13, 2020 now you need too try 6 inch hole into your airbox Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted September 13, 2020 Share Posted September 13, 2020 Those graphs are hard to read on my phone. Any chance of a spreadsheet showing the result from each tested configuration? Quote Link to comment Share on other sites More sharing options...
Truenotch Posted September 14, 2020 Share Posted September 14, 2020 Looks like there's something good happening here. How many KW difference at this point of the graph? Looks like 5ish kw to me. Quote Link to comment Share on other sites More sharing options...
kpr Posted September 14, 2020 Author Share Posted September 14, 2020 @RUNAMUCK I posted some of the dyno graphs from the airbox testing a page back. but can post them all here if you like. @Truenotch Thats same graph as a page back. Yeah about 5kw there. but a dip the other way either side of it. so just trading power from one place to another. Hard to get a gain in one place without loosing it somewhere else. 1 Quote Link to comment Share on other sites More sharing options...
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