Roman Posted July 13, 2022 Author Share Posted July 13, 2022 Yeah the idle is a bit rough as well, basically I've got a 4k with a 3/4 race cam. 5 4 Quote Link to comment Share on other sites More sharing options...
deankdx Posted July 13, 2022 Share Posted July 13, 2022 3 hours ago, Roman said: Yeah the idle is a bit rough as well, basically I've got a 4k with a 3/4 race cam. would it do a 15.xx second 1/4 mile or is it slower than a stock one? Quote Link to comment Share on other sites More sharing options...
Roman Posted July 13, 2022 Author Share Posted July 13, 2022 No at the moment it's considerably slower than when I had the standard cams with ITB on. Something is wrong but I'm quite sure what. I've checked plugs and cam timing and injectors. Seems like it's running on all cylinders fine. I think I might need to do a compression test. Maybe one or more of the valves is leaking a little. It actually kind of feels like when I'm doing the VVTI tests, and you set the cam to 40 degrees advance. When you do this the motor can barely get to the redline, it feels so sluggy. Currently it feels like that everywhere. I am wondering if it would perform a lot better with the intake cam 1 tooth back on the chain, like my previous motor had. It's also got a more grumpy idle, like what happens when you advance the cam too much at idle. Weird. I guess it still could possibly be 1 tooth out on the crank end of the chain. As that's hard to check 100% without the cover off. Dunno. I've exhausted the easy options and CBF is setting in. I might just pull the exhaust out and start planning for the new manifold. 5 1 Quote Link to comment Share on other sites More sharing options...
kpr Posted July 13, 2022 Share Posted July 13, 2022 can you get in there to measure the valve lift at tdc with dial gauge or even by eye? should give you a pretty good idea if cam timing is right. Quote Link to comment Share on other sites More sharing options...
ajg193 Posted July 13, 2022 Share Posted July 13, 2022 What static/dynamic compression ratio are you running with this combo? Quote Link to comment Share on other sites More sharing options...
NickJ Posted July 13, 2022 Share Posted July 13, 2022 On 12/07/2022 at 06:44, RUNAMUCK said: I've often wondered if you could use Kaowool instead of fiberglass in a muffler. Mate tried earthwool on his racebike, worked for a few days then the binders let go and it all collapsed, imagine Kaowool would be much the same. Quote Link to comment Share on other sites More sharing options...
xsspeed Posted July 13, 2022 Share Posted July 13, 2022 was just rereading a the first 20 or so pages, are you going to do the earlier prius motor, the 13:1 one? 1 Quote Link to comment Share on other sites More sharing options...
Roman Posted July 13, 2022 Author Share Posted July 13, 2022 Im just tossing this up. Because the bellhousing situation with the newer motor isnt really as bad as I first moaned about. What I thought was a missing top bolt that is supposed to go through to my engine simply doesnt exist on the normal block either. So there are only two bolts that arent great. One, instead of just drilling this time. I could drill smaller and use a tap, and it would be super legit. The other side is less great though, but could be figured out. The dowels hold it all correctly, and Ithink ive given it enough of a beating to prove it works well enough. I guess im concerned that the only earlier motors I can find look a bit grotty and have been sitting on trademe for a looooong time. Where as the newer motors, I know exactly what im in for. With a newer motor theres less chance of spending the contributed money on a motor that might be a dud. Also I can go back to dodsons and see if they will sell me another one for a little cheaper without warranty again. No such luck with the older motors from a different wrecker, that are more expensive to start with. And might be fucked. Hmmm. 4 Quote Link to comment Share on other sites More sharing options...
Roman Posted July 13, 2022 Author Share Posted July 13, 2022 15 hours ago, ajg193 said: What static/dynamic compression ratio are you running with this combo? 10.5:1 static comp, dynamic varies with vvti. Quote Link to comment Share on other sites More sharing options...
xsspeed Posted July 13, 2022 Share Posted July 13, 2022 i think i missed it but what did you do in the end for clearing the valves and pistons on the 13.4's Quote Link to comment Share on other sites More sharing options...
GARDRB Posted July 14, 2022 Share Posted July 14, 2022 1 hour ago, Roman said: 10.5:1 static comp, dynamic varies with vvti. That seems super low? Is that a typo? Quote Link to comment Share on other sites More sharing options...
xsspeed Posted July 14, 2022 Share Posted July 14, 2022 thats normal for a standard 2nz? its not a atkinson cycle spec hybrid unit 1 Quote Link to comment Share on other sites More sharing options...
GARDRB Posted July 14, 2022 Share Posted July 14, 2022 27 minutes ago, xsspeed said: thats normal for a standard 2nz? its not a atkinson cycle spec hybrid unit Oh true, David and I had been discussing putting the Prius pistons in the 2nz so my brain was still there. 2 Quote Link to comment Share on other sites More sharing options...
shrike Posted July 14, 2022 Share Posted July 14, 2022 According to Wikipedia the 1NZ-FXE and 1NZ-FXP also have forged Rods Along with the 13:1 compression but guessing they are the older motors your speaking of Quote Link to comment Share on other sites More sharing options...
kpr Posted July 14, 2022 Share Posted July 14, 2022 "forged" likely the same process as toyota has been using since forever, they just started making them lighter in the late 90's. not like the 80's-90's stuff that you can run a zillion hp on factory bottom end 1 1 1 Quote Link to comment Share on other sites More sharing options...
Roman Posted July 14, 2022 Author Share Posted July 14, 2022 10 hours ago, xsspeed said: i think i missed it but what did you do in the end for clearing the valves and pistons on the 13.4's I set the intake cam 1 tooth back on the chain, and then used a small stopper inside the pulley to limit the last few degrees of travel. So the stopper limits the total travel to around 37 degrees instead of 40ish, and moving the cam back 1 tooth means it gets to +17 deg instead of +37. So this gets as close as it could to the top of the piston without modification. My new home position for the cam is effectively -20 deg However it worked out well, because at high rpm I'm actually retarding the cam further than it would normally be able to go. Effectively at -7 degrees by 9000rpm. And yes it says "forged rods" on wikipedia but I dont think 1NZFXE has anything special compared to normal 1NZ. Just "wikifacts" they are still pencil sized haha. 4 Quote Link to comment Share on other sites More sharing options...
GARDRB Posted July 15, 2022 Share Posted July 15, 2022 14 hours ago, Roman said: Just "wikifacts" they are still pencil sized haha. Yep, a pencil sized forging is still a pencil sized forging 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Roman Posted July 15, 2022 Author Popular Post Share Posted July 15, 2022 Sooooo.... 56 pages and 651 days later, I'm finally putting an exhaust on it @kpr's awesome awesome awesome manifold fits up great. Thankfully it could fit in from under the car, without having to undo engine mounts or anything. It sits a little too low with the 1300cc motor in there, as the block is shorter. But it will be perfecto once I get a new prius engine. Which I'll get next week. Enjoy some tractor noises! 24 2 Quote Link to comment Share on other sites More sharing options...
xsspeed Posted July 15, 2022 Share Posted July 15, 2022 i missed contributing to engine, can i send some dimes for your dimes @kpr A+ for doing this man, feels like such a pet/vicarious project with how Romandayf shares everything lol 5 Quote Link to comment Share on other sites More sharing options...
xsspeed Posted July 15, 2022 Share Posted July 15, 2022 well not everything i havent subscribed to his only fans 2 Quote Link to comment Share on other sites More sharing options...
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