Hi all,

 

The time has nearly come (finally) to unlock some more power on my zed. I want to up the boost post fitment of nismo 555's but I am unsure of what should/could be done in preparation.

 

Quick overview/current spec: Jimmer build ('07) with forged internals, Z1 GT525 turbochargers, Greddy SMIC intercoolers, divorced downpipes, decat, mongoose quad exit, apexi intake, koyo rad, Andy P chip. This spec produced 365fwhp @ 9psi and Charlie at Surrey rolling road said that all the vitals were good.

 

So the next step was to wind up the boost, however, the duty cycle @ 9psi was touching 90% according to datscan (accurate?). I now have some nismo 555 injectors but I have a few questions.

 

Once fitted (leaving everything else as is), will the car run and drive as normal without any mapping etc?

 

Will I need a specific map to match my spec? I'm pretty sure when Andy P did my chip me gave me a basic boost upgrade map due to my tubbies creating more power at stock psi, but I take it that I'll need a new one to match?

 

What advise do you have regarding monitoring? I'll have aftermarket, accurate gauges to replace the stock setup but what else should I consider or definitely have? I have a live datascan feed to a screen in the dash, is this acceptable/accurate to monitor AFR or any other useful parameters available?

 

I will be using boost jets to up the boost to a fixed level and will keep an eye on the spikes. What is a sensible pressure to aim for with this setup for a safe, reliable (lol) power? Also, at this pressure, what is the general consensus of the initial boost spike using jets, ie what is it likely to peak at before it settles to a set pressure? This will help decide what boost gauge scale range to use in order to monitor the spike.

 

Apologies for the amount of questions and thank you for taking the time to read them, any advice or suggestions welcomed.

 

CheerZ

you will need your car remapping for the 555 injectors m8 ... sticking them in with out the correct cycle timing and map will not run right ... some time not at all due to Flooding the engine

Buy a chip for 555 injectors, fit then sell your old chip.

Buy an Electronic boost controller and have it set up correctly by someone who knows what they doing.

 

When funds allow further down the line, have the car mapped for a specific map to suit your mods and available "safe" power

Then sell your 555 chip.

 

Smithy

Thanks for the input lads.

 

I have a 555 chip that came with the injectors but I'll be sticking with boost jets for now (possibly forever!). So if I fit this 555 chip at the same time as the injectors, I can just get in and drive it?

Thanks for the input lads.

 

I have a 555 chip that came with the injectors but I'll be sticking with boost jets for now (possibly forever!). So if I fit this 555 chip at the same time as the injectors, I can just get in and drive it?

 

Yep you certainly can mate :-)

smithy

 

Yep you certainly can mate :-)

smithy

 

Cool, just wasn't sure if I would need to trailer it to be mapped.

Yep you certainly can mate :-)

smithy

 

you can, I would still be cautious with it until you get the fuelling checked

 

you can, I would still be cautious with it until you get the fuelling checked

 

I think I'll make it my first trip tbh. Any advice on monitoring?

you can either get yourself an AFR gauge to monitor yourself, or just pop over to a dyno for a power run (better).

 

until then, I would stay off boost