DuffyMahoney
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Everything posted by DuffyMahoney
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No throttle blade on any carb or throttle body that I have seen is designed to seat 100%. On carbs that I have rebuilt you can see damage from people trying. I got it to run and idle down, but butterflys stick almost fully. I will fix it right and get an IAC that closes 90-100%. Really I want the IAC off after it's warm. OEMs that do ITB use a large balance log just like this, bmw etc..
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It lets zero air go by?
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It’s not about air. But I could have gotten away with a 8mm hole im guessing.
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Thanks!!
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2 wire. Simple. It’s a popular iac for modders
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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.
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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.
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Fully wired. I was able to use the coil wiring and leave original wires intact for my dpo negative trigger and positive.
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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.
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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.
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Let's talk brake system design
DuffyMahoney replied to 280Z-LS3's topic in Brakes, Wheels, Suspension and Chassis
If you have the money, the zcar kit is pretty darn amazing. It would take the guess work out of all of it. Designed by brake engineers. -
Let's talk brake system design
DuffyMahoney replied to 280Z-LS3's topic in Brakes, Wheels, Suspension and Chassis
With a 17" wheel you have lots of options for calipers. Google what others use and you could design your own brackets? A few calipers people use are the brembo sti calipers or the Cadillac sts calipers? Sts seems to be every ones favorite for cost. Then you could use a willwood proportioning valve to get your bias dialed in? Nissan R32 calipers are also popular. Tons of options unless you want to clear a 14 or 15" wheel. I have the Zcargarage which is a stoptech kit that was designed with the automotive engineers, the bias is about perfect. It's expensive, but I think its worth it. I wanted 15" wheels and a parking brake, plus as good of stopping as I can find. -
It’s a Bosch from a bmw
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The iac needs to be 5/8 ID. This Bosch is just biggie then that.
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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.
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ITB with IAC and pcv here I come. Which mount looks better. Stock coil mount or the rubber one? Rubber one looks lower profile.
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Balance bar cap is done.
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I was doing it from my phone?
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Iac balance bar is looking good. Next is having it cut.
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Thanks! I got slightly more. But not a lot. Stroker Diesel crank is back from marine crankshaft! Offset ground to 84.6mm Toyota rod ends 1.8896” Ground main journals to -020” Dynamic balance Ion plasma nitride, straighten and micro polished.
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L Diesel Stroker crank. Extra offset ground for toyota rods. I will have full details tomorrow. I had the work done at marine crank. I think it’s 84.5 stroke
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Starting cam mock up. I’m using the bonk .535 cam.
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Duffys E31 Flow Testing 63" Static 15" Static 63 Degree Shop 45 Intake Valves 36.5 Exhaust Valves DSI Big Valves LIFT Manometer CFM LIFT Manometer CFM Porting By Andrew Kazanis of Mad Greek 0.05 50 35 0.05 14 35 Date: 2/22/2020 0.1 45.25 60 0.1 13 55 0.15 41.75 90 0.15 12.1 80 0.2 36.5 125 0.2 11.5 95 0.25 33 140 0.25 11 115 0.3 31 160 0.3 10.7 125 0.35 27 190 0.35 10.5 130 0.4 23 220 0.4 10.3 135 0.45 21.5 235 0.45 10.1 145 0.5 21 235 0.5 10.1 145 0.55 21.2 230 0.55 10.1 145 0.6 27 190 0.6 10 150 Datsun Flow Testing Data.xlsx
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Numbers are in. She flows well!
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Datsun Spirit valves are in my E31! Next is flow testing. Thanks for all the help Andrew Kazanis Details: New guides, bronze guide liners, reamed to size, seats cut, three broken studs removed.
