tioga Posted March 7, 2020 Share Posted March 7, 2020 Rubber one. That’s a lot of valve when just a solenoid you pop open at cold start will do a great job and can be hidden like all your other plumbing. For warm idle control you can just add a big chunk of timing to your ignition map below your target idle and take a bit out at above. Works REALLY well. just doesn’t have quite enough bump when stone cold to start without touching the throttle. Once started will idle at any temp. And since it’s just a tweak to your closed throttle timing has zero effect on the way the motor runs. These Toyota ones have a adjustment on how much they kick up the idle too. Quote Link to comment Share on other sites More sharing options...
tioga Posted March 7, 2020 Share Posted March 7, 2020 (edited) I am a little concerned about the long span you have with no bolts on your plate. Do you have a o-ring groove in the top or gasket? I would be concerned it will suck in a gasket without a groove. I have seen plenty of throttle body and intake gaskets sucked in with much closer bolt spacing and larger bolts. Edited March 7, 2020 by tioga Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted March 8, 2020 Author Share Posted March 8, 2020 I got pretty far on the intake. I figured out my basic plan. I also tig welded the old holes and drilled and tapped new ones. So they are centered better. I tapped all existing holes for npt plugs. I also drilled each runner to 9mm. I bought a bspt 1/4 for the stock pcv fitting. Also a 5/8 hose Barb by 3/8 npt brass for the iac. I also had my stacks turned down to fit some cheap filters. Brass or no brass? Tioga- I will use a gasket. Either laser cut paper or silicone stuff. Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted March 8, 2020 Author Share Posted March 8, 2020 On 3/6/2020 at 6:17 PM, tioga said: Rubber one. That’s a lot of valve when just a solenoid you pop open at cold start will do a great job and can be hidden like all your other plumbing. For warm idle control you can just add a big chunk of timing to your ignition map below your target idle and take a bit out at above. Works REALLY well. just doesn’t have quite enough bump when stone cold to start without touching the throttle. Once started will idle at any temp. And since it’s just a tweak to your closed throttle timing has zero effect on the way the motor runs. These Toyota ones have a adjustment on how much they kick up the idle too. The iac needs to be 5/8 ID. This Bosch is just biggie then that. Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted March 8, 2020 Author Share Posted March 8, 2020 On 3/6/2020 at 9:36 AM, Zetsaz said: What IAC valve are you running? It’s a Bosch from a bmw Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted March 15, 2020 Author Share Posted March 15, 2020 now My decision on iac location. I can use the stock 12v + from the coil and also the coil negative wiring for the iac connected to my haltech. So all my wiring will stay the same. Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted March 15, 2020 Author Share Posted March 15, 2020 Well ITB with IAC and PCV is all in and plumbed. Only thing left is 2 wires and some software changes. Pretty happy with how it all turned out. Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted March 22, 2020 Author Share Posted March 22, 2020 Fully wired. I was able to use the coil wiring and leave original wires intact for my dpo negative trigger and positive. Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted March 25, 2020 Author Share Posted March 25, 2020 Well this bosch and all bosch IACs of this style let a ton of air by when closed. Bosch said roughly 30-35%. Which makes the butterfly's useless at idle. My next iac will be a ford. Which closes all the way and only lets a tiny bit of air by. Quote Link to comment Share on other sites More sharing options...
Derek Posted March 25, 2020 Share Posted March 25, 2020 2 hours ago, DuffyMahoney said: Well this bosch and all bosch IACs of this style let a ton of air by when closed. Bosch said roughly 30-35%. Which makes the butterfly's useless at idle. My next iac will be a ford. Which closes all the way and only lets a tiny bit of air by. In theory the butterfly's should be closed at idle and all of your idle air controlled by the valve. 6 butterflies slightly cracked is not a dependable metering method for the air. It can also build up gunk over time but I doubt that will ever be a problem with Mr " I can eat of my motor because it's so clean" Yes I'm jealous . Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted March 25, 2020 Author Share Posted March 25, 2020 3 minutes ago, Derek said: In theory the butterfly's should be closed at idle and all of your idle air controlled by the valve. 6 butterflies slightly cracked is not a dependable metering method for the air. It can also build up gunk over time but I doubt that will ever be a problem with Mr " I can eat of my motor because it's so clean" Yes I'm jealous . Butterfly’s on the Jenvy don’t seat well enough at full close. Spring sticks. So snapped closed doesn’t close enough. So this iac won’t work. Quote Link to comment Share on other sites More sharing options...
Derek Posted March 25, 2020 Share Posted March 25, 2020 13 minutes ago, DuffyMahoney said: Butterfly’s on the Jenvy don’t seat well enough at full close. Spring sticks. So snapped closed doesn’t close enough. So this iac won’t work. Yikes. Is the Ford a PWM controlled like the Bosch? Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted March 25, 2020 Author Share Posted March 25, 2020 8 minutes ago, Derek said: Yikes. Is the Ford a PWM controlled like the Bosch? 2 wire. Simple. It’s a popular iac for modders Quote Link to comment Share on other sites More sharing options...
tioga Posted March 25, 2020 Share Posted March 25, 2020 Bosch also does plunger type iac valves. I can give you a few part numbers if you like. The early bmw 325 used this style. Since we are one butterfly per cylinder the tiny bit you have to keep butterflies cracked to keep from binding when shut is enough for one cylinder to idle on. One butterfly Cracked per 6 would be insignificant. I don’t think it is a jenvey thing but a itb thing. Everything about the jenvey stuff has been extremely well made and thought out. Quote Link to comment Share on other sites More sharing options...
tioga Posted March 25, 2020 Share Posted March 25, 2020 (edited) I guess they were VDO valves now that I look back at them. 13 41 1 707 395 is a number to look at. Hose configuration is the same as your Bosch stepper motor valve. Edited March 25, 2020 by tioga Quote Link to comment Share on other sites More sharing options...
tioga Posted March 25, 2020 Share Posted March 25, 2020 That’s one of the reasons I said before you don’t need a lot of extra air with this set up. Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted March 25, 2020 Author Share Posted March 25, 2020 1 minute ago, tioga said: I guess they were VDO valves now that I look back at them. 13 41 1 707 395 is a number to look at. Hose configuration is the same as your Bosch stepper motor valve. Thanks!! Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted March 25, 2020 Author Share Posted March 25, 2020 1 minute ago, tioga said: That’s one of the reasons I said before you don’t need a lot of extra air with this set up. It’s not about air. But I could have gotten away with a 8mm hole im guessing. Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted March 25, 2020 Author Share Posted March 25, 2020 11 minutes ago, tioga said: That’s one of the reasons I said before you don’t need a lot of extra air with this set up. It lets zero air go by? Quote Link to comment Share on other sites More sharing options...
NewZed Posted March 25, 2020 Share Posted March 25, 2020 2 hours ago, DuffyMahoney said: Butterfly’s on the Jenvy don’t seat well enough at full close. Spring sticks. So snapped closed doesn’t close enough. So this iac won’t work. Just curious, but you're saying that you couldn't get the idle down with that IACV? You actually tried it, or you just did a calculation? Seems goofy to work around a sticky throttle body blade problem, by changing IACV's. Doesn't it? Can't you do more work on the TB's? And, more talking about stuff I don't know well, but will your single port evenly distribute the air to the cylinders? Using an IACV for idle control seems like a great idea. Just wondering about the final execution. Quote Link to comment Share on other sites More sharing options...
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