3/18/2024 0 Comments 1985 300zx air flow meter![]() ![]() Step 7 is to build the rest of the exhaust which I have already done, if you want to see what that looks like scroll up a bit Step 6 was to weld a stub onto the new flange to allow for the making of a fully custom high flow down pipe. Step 5 was to make up a new flange to bolt on top of the waste gate flange which would allow us to merge the OD all the way out to 76mm or 3" to allow a really smooth flowing rear housing. Step 4 once the waste gate housing was fully machined smooth was to slowly taper the flange outward to the edge Step 3 is to machine all the crap off the waste gate flange to give us something clean to work with Step 2 was to fully disassemble the turbo so that the turbine housing could be put on a 3 jaw chuck on the lathe Step 1 was to hacksaw off the horrendous cast rear elbow > see last pic for an OEM disgusting one I will probably have this turbo rebuilt as a t3/t4 at a later date since I already have the t4 front cover and compressor wheel from the turbo which nearly cooked itself. I'm not made of money so i chose to do something to my Factory T3 to improve the flow from the exhaust housing. I really want my car going so I'm less concerned about making power than just having a nice but fairly quick street car Well you guys already know that my big flash turbo didn't work at all so here is the modified turbo i have been promising. ( still needs some tweaks to get it to fit but you can see it steps down smoothly from 3" to 2.5" and then onto the turbo The factory Right Angle Bend.qualiy.Īnd the mock up of the super intake bend. Welding this is going to be a bitch because my welding isn't great and the metal is thin. So far i have done this with some offcuts and $15 of unwanted mandrel bend sections from the exhaust shop. So with all this downtime and so much energy I decided to make a "super Intake Pipe" Well I'm still waiting for the Turbo to be finished, the machinist hoped to have it done by tonight but he has had problems with the carbide cutting tips he is using. a couple of days has passed since this was posted on Datsun NZ and copied over here. the factory T3 is getting improved slightly by cutting off the horrible cast iron down pipe and boring out the flange to 3" to accept a 3" bit of pipe right off the back of the turbine wheelĪnd even though it looks tiny I'm told by an experienced man that its the best option until i have the rest of the car finished up ( LSD, back shocks, inter cooler etc ) However it wasn't making any boost before about 4500rpm and the turbo was getting really bad surge. Started tuning which went well got it running good at light to mid load across most of the fuel map. I don't but my very experienced engineer/fabricator/expert on many things has tuned a lot of cars and is doing this with me.Īs you can see here I have added a proper spare tire as the space saver requires pumped up by a tiny air compressor to save on space aka supercar style *Display gauge so the driver can see the air fuel mix ( and back the hell of if it lean spikes or something )Īnd the hardest part of all is somebody who knows what they are doing. *ECU which connects to laptop ( is what I used in my original ECU ) Is way off the mark, it seems you need so much crap to do it. "cos its a computer and it can just sort itself out" To anybody thinking tuning an EFI system is going to be cheap or easy Picked up my 3pc rims, i love them they are pretty dam 80's bad ass.Ĭenter bore needs to be opened up to fit so here is a pic with them held up to the car instead & other misc pics. This car has also been fitted with a brand new crank angle sensor and other "prone to failure" on old cars kind of stuffīled the clutch up & bypassed the stupid clutch damper with a 280zx brake hose, clutch still feels a bit light considering its a heavy duty one. Wired up my new Ignitor module, the old one still works fine but i don't want miss fires under boost in 5th gear at high rpm when something could easily be ruined from it. * Fitted a Flash new K&N high performance/race oil filter and dropped the running in oil with cam additives for some mineral 15/40 to finish running in before a switch to synthetic Ams Oil ( close enough to get me to a proper laser alignment place ) * Power Wires and fuses run through firewall for data logger ![]()
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