what do you need to biuld a turbo?

[1s132c]

I was thinking about turboing my KA-E but I am not sure if I fully know how to biuld on. what is a list of everything I would need.I know:turboexausht manifoldwaste gateBOVI was going to use nissan hardbody pistons to drop compression.I think I need bigger jets but if so would I also need a fuel regulater.and I am not sure if I need to hack my MAF.and of course pippings

thats all I know so far if there is anything else I am missing from completing a turbo please let me know thanks..

[koukiKA240]

what u named plus:intercooler and piping downpipeprolly find a way to block off egr (its easy, took me an hr)larger injectors, depending on how much power you want will tell you the size of the injectors you will need.as for the MAF that also depends on the power, i dont know the psi that the stock one stops reading but there is a way to hack it, or upgrade to a 300zx maf, and that would mean you would need an ApexI safc or jwt reprogram.

as for the FPR, im running MSD 50# and stock FPR, while this may not be optimum, it works. I plan to upgrade when i come up with some money.

umm..what else...

different spark plugs perhaps? one step colder gapped to about 35 would do for 300hpish.

and let me be the first to welcome you to the boards.~Sam

[crzycav86]

Oil lines.

I was in the same boat as you last September(when I decided to go KA-T). I had the basic concept, didn't have any experience with engine work, and I didn't know about some of the more advanced parts of the ka-t. Now, several months later, I have a little more experience since I started on it, but more importantly, I know what I'm doing!

The moral of the story is: Read the threads in this forum religously. When you see parts that you've never heard of, do a SEARCH and learn about them. Also, don't be afraid to open up your hood and look around/tinker. It'll help a lot.

Anyway, that's basically me speaking from experience, and it works really well.

Good luck bro.

[eddiec]

Also, don't be afraid to open up your hood and look around/tinker. It'll help a lot.

^^^^what he said

[1s132c]

thanks alot, engine work is no problem. I stripped out a turbo from a 13b to put on my brothers 13b. it worked well but his car was already turbo. I was going to fabricate a turbo manifold of the stock headers. I dont want much horse maybe 20-30 horses is good. I was not going to put an intercooler, because it is not really needed plus they are expensive. Are the oil lines for the waste gate or do I just need to replace the stocks for bigger lines. Also can I leave the stock jets and maf if I only gain maybe 30 horses or put a low psi like 4

[Red-KAT]

at 4psi you should be fine with stock injectors... And I think the MAF is good to 8-9psi.

[KATwo40]

at 4psi you should be fine with stock injectors... And I think the MAF is good to 8-9psi.

Uhhh, not quite.

A 4psi on a t3 is not the same air flow as 4psi on a T3/T04e.

The stock injectors will work at 4psi, but that's pushing it. If you wanna keep the injectors, use a rising rate fuel psi regulator, otherwise known as an FMU (fuel management unit). You'll want a 12:1 ratio on the FMU. This way, you use no electronic tuning. Also, the stock MAF is good up to around 240whp. You won't be seeing those numbers on a 4psi setup, so don't bother messing with it.

If you choose to go with electronic tuning, I'd go ahead and step up to 370cc injectors. If you wanna push more than the 220-240whp range, I wouldn't recommend just an FMU, as you'll want some finer tuning capabilities. Also, I don't recommend pushing the stock injectors that hard.

Have fun!

[nissanfanatic]

12:1 with a T3? Uhhh I don't think so.I use an 8:1 for my T04B and it runs a little on the rich side.

A Rising Rate Fuel Pressure Regulator(RRFPR) is NOT a Fuel Management Unit(FMU) and should not be used as a permanent tuning tool. Slight changes yes, but long term, no. A RRFPR is used to equalize pressure in the fuel system for pressure in the intake manifold.

PSI is a bad way to rate engine power. As stated earlier, airflow differs between compressors. The stock MAFS maxxes out around 250whp give or take a little. Injectors max out below 200whp. IDK that anyone has really found a limit on them as no one cares. The average joe either goes with a FMU or larger injectors.

You need gauges too. A boost, oil pressure, and wideband AF are good places to start, but everyone has thier opinion on the subject. EGT is a waste of money.

Plan on making a million trips to the hardware store too. I probably spent $100+ at my local hardware store.

If you are looking to use the stock fuel system, at least upgrade the pump and filter. Walbro 255lph pumps are a good cost efficient pump. 300zx TT fuel filters are a good alternative to the stock fuel filter.

[KATwo40]

Intresting about your FMU. When I was searching for a kit (before I said screw it and built my own kit) many of them included a 12:1 FMU (which IS a rrfpr...). Either way, doesn't matter to me. I'm using 370's and SAFC.

[nissanfanatic]

Alright, here is a quote from Structure240sx from ka-t.org:

"here is a formula to figure out what a new fuel pressure will change you injectors to:

take the square root of the new pressure divided by the old pressure and multiply by the injector size.

so lets say an 8:1 fmu at 6psi. base fuel pressure of 40psi (thats mine some get higher number thanks to the walbro). so 8x6=48+40=88psi new fuel pressure. 88/40=2.2. sqaure root of 2.2=1.48x270cc= 400cc. this means that the 8:1 fmu at 6psi will change the stock 270cc injectors into 400cc injectors.

now dont think this means you can run a 12:1 fmu at 15psi and have 633cc injectors. fuel injectors can onlly take so much fuel pressure. a good rule of thumb is to not go over 100psi. plus although you add soo much pressure the injectors just cannot flow that much fuel"

I don't know about you, but I think 400ccs is plenty to cover any 6psi setup on a typical T04 compressor. And what happens at a 12:1? 115psi of fuel pressure. Do you know how much stress that puts on the injector? A lot.

A FMU is not a RRFPR. Take off the FPR and leave the FMU on. What happens? You have a large fuel circulator and zero pressure in the fuel rail. Because a FMU sure doesn't regulate fuel pressure. RRFPRs are used to adjust base pressure and equlize pressure between boost and fuel pressure, thats it. FMUs are used to increase fuel pressure per psi of boost.

[KATwo40]

blah, Ok, you got me on the technicality of the RRFPR / FMU argument.

Also, thanks for the math on the fuel psi / injector flow. That's very useful.

Good thing I didn't fall for one of those Ebay kits then LOL

I retract my miscalculated input.

[1s132c]

quick questions?I read it is better to run your airflow meter after the turbo is that true or does it make no differ.second, does capping off the fuel return line on do anything?

[1s132c]

i am getting a ct26 turbo. And I am going to start my transformation. I got the exaust manifold, Bov, pippings, down pipe, boost gauge, and I the only oil line I need is from the oil pan to the turbo right? also everything should be able to hold up right. since I am not going to increase boost injecters and everything should run fine right