Puttin it together checklist!!!!

[Darchangl]

I have recently finished painting the engine bay and after 2 years i am ready to put her together. I just start a list of parts i have or am ordering and would like any imput on anything I might be forgetting.

t25ss auto manifoldic and pipingsr injectorswalbro 255 hi flowoil linesturbo elbowsblow off jim wolf tuned ecuexhauststage 4 clutchfidanza light weight flywheelnew beltsplugswaterpumppcv valvehead gasketexhaust gasket missing anything?

I have also been told both that i need and dont need a new fuel pressure regulater? whats the answer?also been contemplating a safc 2 as well with wide band .. any thoughts?

Last bit is i plan on runnin 7-8 pounds hoping for 230-250 hp. Eventually i will up the ante once my other engine is built.

[ken240sx]

get the wideband 02 sensor w/gauge....no need for an safc cause you have an ecu tune. You don't need an aftermarket fpr.

[ken240sx]

btw, what about a downpipe to hook that turbo to your exhaust....and an aftermarket exhaust. Are you re-circulating your bov?

[Darchangl]

i do have a downpipe and i didnt plan on a recircualtiing. however looks like some have issues when not running it.. so still up in the air..prolly stick with what i have unless i need the recirculating. as far as the wideband isnt that just a monitoring system? wont i still need the afc for fine tuning? i figured the jwt would be a round the park tune and i would get it dyno tuned with the safc. is this incorrect?

[ken240sx]

do you have the jwt ecu yet? if you don't don't buy one, they are horribly overpriced. Look up emance, he'll do your ecufor 125-150ish and it's really just as good or better. Also, you'll want a recirc, because the MAFS meters the air coming in and when the bov spits out a burst of air, the car runs way rich because it planned for a certain amount of air and the bov just shout out half of it. On top of that you get the benefits of air rushing back into the system before the turbine which will help your turbo stay spooled up more than if you had an atmospheric bov between shifts. If you don't go recirc you're going to want to do a blow-thru set-up, where you locate your MAFS between the intercooler and the throttle body.

[Darchangl]

what will moving th mafs onto the other side of the intercooler solve? just wondering how this works or if i understand what ur sayin. and btw...i havent ordered the jwt yet but for piece of mind i think im gonna stick with it since its gonna be a long term investment..a couple hundred bucks over the time of a year isnt to much imo

[240sxvaj]

You don't need an aftermarket fpr.

As long as the car isnt as old like my 91 240 then i think you should be fine. I was told i didnt need to replace it, and i took everyones advice and had my car die on me on the freeway many due to a bad fpr. If you want to be safe replace your afr now so later when you plan on upgrading turbo or boost high then you wouldnt have to worry about spending more money. Or you can buy a gauge.

[ken240sx]

If you have the mafs between the intercooler and the throttle body and your bov on the hot pipe then you don't need to recirc it because the air won't have been metered yet before it gets blown to the atmosphere, which means no juicy richness or stalling between shifts or letting off the throttle. Another good thing about it is that it's not exposed to as much heat over there. I'd say probably the main reasons I'm going to be converting over to a blow-thru set-up myself is the ability to use an atmospheric bov and the fact that if the maf is reading hte air right before the throttle body it's going to be more accurate and take less fine tuning....because if you're metering before the turbo, the air first heats up cause of the turbo and compression and then cools down to a certain point from the intercooler and piping, how is your maf going to figure out what temp the air is when it goes into the manifold? That's where the fine tuning say with an safc or good ecu tune would come into play. Oh and by the way, I don't know of anyone who hasn't been satisfied with an Emance tune...he's been doing it for some time. JWT is hugely overpriced because they know people will buy it and also that they are pretty much the only "company" that does the tunes for the 240 with so much experience. I recommend Emance because he'll do it for 1/3 of the price or less and it's a quality tune.

[480sx]

The stock FPR on the 240 was not designed for the volume of fuel that a Walbro will pump. You will get a fuel pressure spike when the pump kicks on. They are also known to fail.

Always a good buy to get an aftermarket 1:1 FPR.