Popular Post Roman Posted August 20, 2022 Author Popular Post Share Posted August 20, 2022 It's normally open, then pulls shut with vacuum applied. Today I managed to get the rear two parts finished-ish, enough to take it for a drive. There are still a few pinhole leaks to sort, yada yada. But first time taking it for a drive again after a long absence was awesome! Compared to previous tune it was running rich basically everywhere. Which isnt a good sign... Looking at the logs when I got back, either I have forgotten to plug the VVTI solenoid back in, or the pin in the pulley has jammed itself again. As the cam isnt moving from home position. So that explains it! Should be an easy fix. So no meaningful results yet, but hopefully tomorrow some time I'll fix some of the bangs and rattles from the exhaust, and give it another go. The absolutely awesome part of all this though, is that with the rest of the exhaust on, even when the valve is open the motor is a comfortable noise level at idle. At cruising speed it sounds almost the same as before, its well within comfortable limits. At full throttle is pretty rowdy but doesnt sound tinny or gross. I'm super stoked with that! 39 3 Quote Link to comment Share on other sites More sharing options...
Popular Post Roman Posted August 21, 2022 Author Popular Post Share Posted August 21, 2022 First run with VVTI working, and its looking promising! Using the existing fuel map it's now running lean through the majority of the rev range. Needing nearly 12% more fuel around 6100rpm, and 4% from about 7000 upwards. Any difference in fuel requirements is interesting, as I was not sure whether power difference would come just from reduced pumping losses. (gainz, even if AFR stays same) The road I drove on wasnt great, so virtual dyno results arent useful currently. The cam timing isnt optimized for this setup yet either, I think what KPR said is that it will probably want more cam advance at higher rpm now. I'll have to see if I can sneak back on the dyno some time soon. 28 Quote Link to comment Share on other sites More sharing options...
GARDRB Posted August 21, 2022 Share Posted August 21, 2022 Higher fuel needs in the midrange point towards the Garage1NZ Super Octopus SPL Header picking up strong midrange ga1NZ? 7 Quote Link to comment Share on other sites More sharing options...
Roman Posted August 22, 2022 Author Share Posted August 22, 2022 Yep anywhere it needs more fuel, should be some power gains hopefully! 2 Quote Link to comment Share on other sites More sharing options...
datlow Posted August 22, 2022 Share Posted August 22, 2022 12 sec 1/4 vid plz A+ WORK 5 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Muncie Posted August 22, 2022 Popular Post Share Posted August 22, 2022 Remember to uncheck the "rod ejection system" box when setting up the ecu again. 5 5 Quote Link to comment Share on other sites More sharing options...
Popular Post Roman Posted August 22, 2022 Author Popular Post Share Posted August 22, 2022 It's one of those cost saving measures, where instead of having a fuse installed for the rods. The rods are the fuse! I cut the pipe a bit shorter, it doesnt look as obnoxious as I first imagined it would. Might paint it black for a bit more stealthiness. I did some VVTI adjustments, just trying +- 5 degrees from existing settings. Seemed inconclusive, I dont think there will be any major wins or losses from VVTI in this case. However it might work out that a different runner length works better with the current exhaust. So will try some iterations and try get a few sets to swap while at the dyno this next time. I should probably also get back to figuring out a 2nd injector rail setup, so I can test that at the same time. 21 1 Quote Link to comment Share on other sites More sharing options...
Truenotch Posted August 22, 2022 Share Posted August 22, 2022 Nice work! Can we hear it now? 2 Quote Link to comment Share on other sites More sharing options...
Roman Posted August 22, 2022 Author Share Posted August 22, 2022 Yep soon, will just fix the rattles first 1 Quote Link to comment Share on other sites More sharing options...
kpr Posted August 22, 2022 Share Posted August 22, 2022 looks like should nicely fill that dip at 6k another run with those long bendy intake runners please Quote Link to comment Share on other sites More sharing options...
Popular Post Roman Posted August 22, 2022 Author Popular Post Share Posted August 22, 2022 Yeah that will be awesome if it does! As that means the entire rpm band that it uses at the drags will be out of the dips. Yeah I'll give the longer ones another go now. Here's some exhaust noises. Doesnt overpower the intake at all. Super happy with it! 20 8 Quote Link to comment Share on other sites More sharing options...
VitesseEFI Posted August 23, 2022 Share Posted August 23, 2022 Sounds pretty keen ….. seems very dark though, could maybe go a bit harder with the lights on? 2 Quote Link to comment Share on other sites More sharing options...
Roman Posted August 23, 2022 Author Share Posted August 23, 2022 Nah I would lose about 1/4 of my power by turning the lights on 3 2 Quote Link to comment Share on other sites More sharing options...
xsspeed Posted August 24, 2022 Share Posted August 24, 2022 jeah boi sounds hot AF 1 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Roman Posted August 24, 2022 Author Popular Post Share Posted August 24, 2022 I tried to get the exhaust valve working today. One problem is I've got nowhere good to get a vacuum source. I had plugged up the factory injector holes, and was running the BMW injectors on the throttles now. However it's felt a bit sluggy that way on transients, I think the BMW manifold sits closer to the head normally and has a straighter shot at the port. So it was going to be easier to switch back to the regular rail position, and use the BMW injector ports as a vacuum source. I figured since I'm here, I might as well try the 2016 blue Prius injectors. As they have a 12 or 16 hole injector that should have a pretty good spray pattern. Got them in and drove okay, but reached 100% duty real quick. Looks like they're something around 190cc. So not going to work, or they might be good as inners for staged injection. But then, I'd rather have the ability to switch just to 1 set of injectors if needed. So out they go. I put the 2ZZ injectors back in, at the port location. Car feels a little bit nicer on transients again, but needs fuel map sorted. I've found my graduated cylinder so I'll do some proper tests to characterize the injectors. It's night and day difference for things like temperature compensation, when the deadtimes and short pulse width tables are correct. So anyway, the point of all this before I got sidetracked. I ran a vacuum line from one of the throttles to the exhaust valve, and started the car up. And the valve is rattling like crazy as it pulls the valve half shut. There isnt steady enough vacuum to pull it all the way shut, and when its on part way travel and oscillating. Even if if I link up multiple throttles to a vacuum can, I'll still end up with some load and rpm point where it's just going to rattle. I guess I could fit a VSV to avoid that problem, but I think I'll just chop it back out. If I hold the valve shut, it doesnt seem to make so much difference now that the rest of the exhaust isnt leaking like a sieve. Was worth a try though! Here's a myspace selfie photo angle that hides most of my exceptionally messy wiring. 28 2 Quote Link to comment Share on other sites More sharing options...
ajg193 Posted August 24, 2022 Share Posted August 24, 2022 Is there no usable vacuum in your brake booster anymore that you could tap? Quote Link to comment Share on other sites More sharing options...
kpr Posted August 24, 2022 Share Posted August 24, 2022 Vac tank with 1 way valve, and 3 port solenoid would be way to go 2 Quote Link to comment Share on other sites More sharing options...
yoeddynz Posted August 24, 2022 Share Posted August 24, 2022 On 22/08/2022 at 15:56, Roman said: I should probably also get back to figuring out a 2nd injector rail setup Have you ever considered a Nikki carb with mechanical secondaries? 2 1 4 Quote Link to comment Share on other sites More sharing options...
smokin'joe Posted August 24, 2022 Share Posted August 24, 2022 31 minutes ago, kpr said: Vac tank with 1 way valve, and 3 port solenoid would be way to go or small diesel alternator ? 1 Quote Link to comment Share on other sites More sharing options...
mjrstar Posted August 24, 2022 Share Posted August 24, 2022 Fit teleflex cable to butterfly, then add a choke cable knob from a Morris minor mounted on the dashboard. No need for that vacuum fuckery. 5 3 1 Quote Link to comment Share on other sites More sharing options...
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