If you ever wanted to port match your intake manifold to your throttle body then you gotta see the video below by Skunk2 Racing. It’s Awesome, Watch it, Enjoy!
If you buy a used engine with a damaged or malfunctioning Throttle Positioning Sensor(TPS), then you’ll need to replace this before starting your engine to make sure it will run properly. The throttle positioning sensor sends real time throttle position to the ECU which in turn adjusts the flow of fuel through the injectors to make sure you getting your proper fuel mixture to run your engine properly.
Click Here for a link to a Do It Yourself that was posted on D-Series.org on how to swap out your TPS on your throttle body.
If you ever wondered what’s inside a VTEC Solenoid assembly then here you go. I cleaned mine out from my D16Z6 engine and snapped a few pictures for reference. As you can see in my pictures below my pressure switch has a broken plug socket so I will have to replace that before I mount it back on my engine. The pressure switch gives the go ahead to the ECU when the oil pressure is high enough to engage VTEC. Once the ECU sends the signal to the VTEC Solenoid it opens a valve and feeds oil to the VTEC Assembly, this engages a higher torque cam lobe and gives you more power.
The car has been running good since this morning so I decided to wireup the VTEC tonight. I soldered all the wires to make sure I was getting good connections and used some zapstraps to keep the wires tidy. Overall it was an easy thing to do and now I don’t have the engine light any more. I took it for a couple rips down the street and man when that VTEC engages it pulls hard. The D16A with my intake, header and exhaust should be putting out about 145HP so getting up to 200-220HP with a turbo should be a realistic goal with some additional addons.
The engine still had issues running rough the last few days and I didn’t have time to do the valve adjustment to see if that would help so I messed around with the sensors last night and added some fuel injector cleaner into the tank and this morning it seems to be good. I also had a fuel odour coming out of the engine compartment but couldn’t see anything leaking badly but with a closer inpection and a sniff test I narrowed it down to an injector. I pull that injector out and I guess when I swapped the injectors last week i must of kinky the seal on this one, so in the future I will spray some WD-40 on the seal so it goes easier into the fuel rail. This morning there was no more fuel odour and engine ran better after adding the fuel injector cleaner and messing around with the sensors.
Great link about the maximum HP you can run with your stock injectors RTR Performance.
So looking at this formula 92-95 Stock injectors are 240cc divided by 5 = 47HP per injector so 47HP multiplied 4 =188HP
Both the D16z6 and D15B7 have a stock flow rate of 235(cc/min). So they seem to be the same injector.
So the stock injectors are good for upto 192HP more or less, I would say if you running anything more then 170HP i would run better injectors just to make sure you have enough fuel flowing into your cylinder. These numbers are just a overall rating because it there are other factors to consider such as dirty, old or used up injectors which now would be working at less then maximum efficiency.
Here is a list for more Honda injector Flow rates Accordingly Done
Another great link for figuring out the proper injectors. RCENG
